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luckie2hav3her
10-13-2005, 03:17 PM
searched around some bit and found out that so far the top speed on a 240, sr swapped, is around 140mph?? of course this is with no speed limiter, so basically 140 is the fastest? my question is has anyone gone faster?? dont trip i have my flame suit on :fawkd:

TheSnail
10-13-2005, 04:39 PM
This is the fastest one Ive seen (170+ in 4th). Its all about the tallnest of your tires, diff, and hp. I am going for 180mph as my NewYears resolution.


http://www.zilvia.net/f/showthread.php?t=85596&highlight=170mph

Here is a top speed calculator
http://www.mustangii.net/topspeed.asp

OJmobileII
10-13-2005, 05:11 PM
personally 155mph s13 coupe w/ t28 red top in fifth at 6500rpm. stopped b/c the inner fender liner on front passenger flew out making a loud noise.

gsracer
10-13-2005, 05:14 PM
167 mph according to police radar . and still when another 800 rpm in 5th after i saw the cop. lol

timmybgood
10-13-2005, 10:08 PM
soo.....what happened after that?

TheSnail
10-13-2005, 10:15 PM
He met Derik Jones, X-football player. And now can eat 12" subs without using his mouth.

driftyour40
10-13-2005, 11:03 PM
^^^ :bowrofl:

MakotoS13
10-14-2005, 07:20 AM
im working on some projects to increase aerodynamic efficiency for the car. i can't seem to find any GT style functional front spoilers made for the car, however. this is unrelated to what im planning on but it'd certainly help for when i get enough power to go 150+.

Ian
10-14-2005, 07:40 AM
make some underbody splitters

slam the car low w a home depot lip

get a big wing that hangs off the back 2 feet

MakotoS13
10-14-2005, 07:56 AM
make some underbody splitters

slam the car low w a home depot lip

get a big wing that hangs off the back 2 feet


1- no such thing. they're called diffusors

2- slamming the car is stupid

3- home depot lips do dick for stopping 150+mph wind

4- NO

S14DB
10-14-2005, 08:04 AM
diffusers?

MakotoS13
10-14-2005, 08:10 AM
something like that.

m072514
10-14-2005, 08:33 AM
1- no such thing. they're called diffusors

2- slamming the car is stupid

3- home depot lips do dick for stopping 150+mph wind

4- NO

diffusers actually DO work, but most of the aerodynamic resistance comes from turbulence in the rugged underbody of the car. mini-fins on the rear of the car would help induce a tapering effect, much like those on the tops of EVO8's. and slamming the car is NOT stupid, if all youre looking for is top speed. the bugatti veyron quadturbo LOWERS itself 2" to make a top speed of 250+ mph. also, reduce downforce. but you start to lose drivability and cornering capability, and if you are worried about going over 140 mph, YOU BETTER BE DOING IT ON A TRACK.

Jcb890
10-14-2005, 10:12 AM
diffusers actually DO work, but most of the aerodynamic resistance comes from turbulence in the rugged underbody of the car. mini-fins on the rear of the car would help induce a tapering effect, much like those on the tops of EVO8's. and slamming the car is NOT stupid, if all youre looking for is top speed. the bugatti veyron quadturbo LOWERS itself 2" to make a top speed of 250+ mph. also, reduce downforce. but you start to lose drivability and cornering capability, and if you are worried about going over 140 mph, YOU BETTER BE DOING IT ON A TRACK.

werd. couldn't have said it any better. however, not everyone has access to a track and i know not everyone would if they could... so just be careful.

MakotoS13
10-14-2005, 10:23 AM
diffusers actually DO work, but most of the aerodynamic resistance comes from turbulence in the rugged underbody of the car. mini-fins on the rear of the car would help induce a tapering effect, much like those on the tops of EVO8's.

nobody's saying they don't but some white trash rubber lip from home depot isn't going to add dick to the front of the car as far as downforce is concerned. i'm working on aluminum plating for the front and rear underside of the car to decrease turbulence. this should help substantially, a faggot home depot lip isn't going to do near as much as a REAL front lip that adds downforce at speed.

and slamming the car is NOT stupid,

most of us drive street cars. a fraction of a percent MIGHT have dedicated race cars, slamming is RETARDED and 250mph is a LOT more than 200mph.

if all youre looking for is top speed. the bugatti veyron quadturbo LOWERS itself 2" to make a top speed of 250+ mph. also, reduce downforce. but you start to lose drivability and cornering capability, and if you are worried about going over 140 mph, YOU BETTER BE DOING IT ON A TRACK.

obviously nobody is going to be in the pigglywiggly parking lot going for a land speed record. a quick blast to 160 is safe so long as you do it in the right place.

Jcb890
10-14-2005, 10:29 AM
nobody's saying they don't but some white trash rubber lip from home depot isn't going to add dick to the front of the car as far as downforce is concerned. i'm working on aluminum plating for the front and rear underside of the car to decrease turbulence. this should help substantially, a faggot home depot lip isn't going to do near as much as a REAL front lip that adds downforce at speed.

most of us drive street cars. a fraction of a percent MIGHT have dedicated race cars, slamming is RETARDED and 250mph is a LOT more than 200mph.

obviously nobody is going to be in the pigglywiggly parking lot going for a land speed record. a quick blast to 160 is safe so long as you do it in the right place.

he said he wanted top speed, so for when he goes out and does his "top speed run" he can slam the car then bring it back to the ride height he likes when he's done. thats why they're adjustable ;)

but yeah, a home depot lip isnt gonna do very much compare to a real nice lip thats specifically made for speed and stability. people use the home depot method because its easy and cheap.

MakotoS13
10-14-2005, 11:56 AM
i know of some highways in texas where high powered cars get near 200 if they have the balls at the right time of night. you can plan things like that and drastically decrease risk just dont expect to maintain that speed for more than a second or two.

luckie2hav3her
10-14-2005, 12:21 PM
yea i just recently got back from a cross country trip, drove from NJ back to so cal, when i went through texas i swear i was going straight for like the whole night nshit (which was like 7 hrs of driving), i took the car i was driving up to like 130 hehe, little stock mr2 was decent

i-love-my-s14
10-14-2005, 12:41 PM
Ive only taken mine to 155 racing my friends M3, I could of kept going, but I think that 155 is fast enough. plus I beat him.

m072514
10-14-2005, 02:06 PM
obviously nobody is going to be in the pigglywiggly parking lot going for a land speed record. a quick blast to 160 is safe so long as you do it in the right place.

a quick blast to 160 isnt safe on public roads. or highways. and if you drive a street car, you shouldnt be worried about anything CLOSE to your top speed. for someone who is always defending cops you seriously make their lives/jobs alot harder. and makoto, what exactly is a "faggot" home depot lip? you dont want that much downforce at high velocity because it creates too much of a low pressure system that detracts from that coveted top speed you so avidly seek.

Gnnr
10-14-2005, 11:20 PM
I believe there's a nismo gear that you replace 5th with to get over 160 in the 240. I dont think the gearing is correct for very high speeds in our cars. Not sure. And there are public roads that aren't regulated= no speed limit.

MakotoS13, have you checked into Aero kits? I'm sure you have, I've read of companies in japan that design aerodynamic body parts, hence Aero kits and not body kits, but they cost a lot, dont know it there are any for the S13.

BTW, does anyone have a video of a 240 topping out? I was looking for one the other day, would be great for my video collection. :D

cotbu
10-15-2005, 06:15 AM
The elusive Top Speed demon... What do you do when you find her? Better have footage of it, nobody believes she exist.

the head
10-17-2005, 09:18 AM
a quick blast to 160 isnt safe on public roads. or highways. and if you drive a street car, you shouldnt be worried about anything CLOSE to your top speed. for someone who is always defending cops you seriously make their lives/jobs alot harder. and makoto, what exactly is a "faggot" home depot lip? you dont want that much downforce at high velocity because it creates too much of a low pressure system that detracts from that coveted top speed you so avidly seek.

yes but without the additional front end downforce the possibilities of getting frontend float or high speed instability can also increase thus minimizing your potential for living to tell about your endavor. My first suggestion is put underpans on the car to make the undercarrage as flat as possible then look into diffusers and adjustable chin spoilers once you get that completed.

axiomatik
10-17-2005, 11:22 AM
As mentioned above, lower your car as much as you can while maintaining drivability and put a splitter on the front end. This minimizes the amount of air that goes under your car, reducing both drag and lift. Add undertrays to smooth airflow under the car. I would also suggest a vented hood. At 150 mph, a lot of air is going through the radiator, and you don't want that air escaping under your car. Finally, a rear diffuser will help, but that is the most difficult to implement properly due to the gass tank.

HyperTek
10-17-2005, 11:29 AM
140mph stock KA is possible.. Ive done it, S13 hatchback lowered no aftermarket aero, headlights up *was at night*.. dunno about the aerodynamics of s14 KA powered.

I dont really plan on ever running that fast anymore, not with big wheels and body kit..

Jcb890
10-17-2005, 11:37 AM
140mph stock KA is possible.. Ive done it, S13 hatchback lowered no aftermarket aero, headlights up *was at night*.. dunno about the aerodynamics of s14 KA powered.

I dont really plan on ever running that fast anymore, not with big wheels and body kit..

a stock s13 KA? for some reason i have trouble believing you went 140mph.

MakotoS13
10-17-2005, 11:50 AM
i have trouble believing you haven't choked on your own tongue by now but apparently evidence of that is your very post on this thread.

Jcb890
10-17-2005, 12:56 PM
i have trouble believing you haven't choked on your own tongue by now but apparently evidence of that is your very post on this thread.

the best part of you dribbled down your mother's leg.

i dont pretend to know everything about 240sx's and KAs, i was just saying i didnt think a KA would hit 140 unless on a HUGE straight away going downhill w/ a tailwind, thats all.

Bryants95240sx
10-17-2005, 02:21 PM
it wouldnt be hard to hit a 140 with a stock KA, he didnt say he got there fast

S14DB
10-17-2005, 02:29 PM
the best part of you dribbled down your mother's leg.

i dont pretend to know everything about 240sx's and KAs, i was just saying i didnt think a KA would hit 140 unless on a HUGE straight away going downhill w/ a tailwind, thats all.
Once again you have no clue what you are talking about. You are insulting other members. Hell, you can't even compose a sentence properly. You're rep is way in the negative...

You are fast on the way to banned-vile buddy.

sideview_180sx
10-17-2005, 03:33 PM
wow this thread went the way of a ricer on a california mtn. road, straight and right off a cliff and hit every branch on the way down. Don't post info unless you have proof idiots. KAs can pull up to 140 once fuel and ign cut are bypassed. m072514 you are an idiot to think the front lip could create enough downforce to hold him back, you want front the end to stick. Easiest way is to look at top speed skylines. Not slammed, usually 17s and 18s, the front end is usually big too cool the engine that will create much heat for sustained WOT, and they run a softer suspension and have the luxury of very smooth roads. Plus they make plenty of power to get to there goal. Sure every car is different, but you still follow the same methods of getting the initial quirks fixed before you start going all crazy with underbody components.

MugeNismo
10-17-2005, 04:30 PM
I been to about 130 in my stock fastback s13 sohc with bad struts, my speedometer has a mind of its own but my friend said he was doing 110 when i flew past him. very scary :eek3:

SHIFT_control
10-17-2005, 04:43 PM
I believe there's a nismo gear that you replace 5th with to get over 160 in the 240. I dont think the gearing is correct for very high speeds in our cars. Not sure. And there are public roads that aren't regulated= no speed limit.

MakotoS13, have you checked into Aero kits? I'm sure you have, I've read of companies in japan that design aerodynamic body parts, hence Aero kits and not body kits, but they cost a lot, dont know it there are any for the S13.

BTW, does anyone have a video of a 240 topping out? I was looking for one the other day, would be great for my video collection. :D

Actually the gear you speak of shortens the ratio of 5th, I have never taken my car above the 118 mph cut, but the trans should max out at about 155 with the stock gears, and lessw with this Nissan Motorsports (not NISMO) gear.

Jcb890
10-17-2005, 05:17 PM
k, just figured it wouldnt be that easy for an s13 KA to hit 140 since its not a very powerful car. guess i was wrong.

240SeXy!
10-17-2005, 05:32 PM
You could allways do what that rx-7 did on the Salt Flats, 205 catch and little wind and now its a frisbee..

:D :nono:

MakotoS13
10-17-2005, 11:07 PM
205 is REALLY far from 150.

you need like 350hp in a vette to do 173 ish. you need 500 to do 205.... and thats a fuggin aerodynamic mother. think about it.

drift freaq
10-18-2005, 12:30 AM
hehehehehe did 125 on the 5 today on my way up to norcal and it had room left to go more but I had to break off due to upcoming traffic in front of me. hahahhahhahhaha auto to 5 speed swap running auto ecu. no speed cut!! Single cam KA!! 89 Base stock bodywork!!
Guys before you go dispelling top speed capabilities of the S13 realize a few facts about it. It has a drag coefficent of .031 and center of gravity of .029 and a near 50/50 weight balance, add to that a .89 stock skidpad rating. Which basicaly translates to car that is very slippery and capable of stable high speeds, (even in corners) in the 100's.

AllenRPS13
10-18-2005, 12:57 AM
140mph stock KA is possible.. Ive done it, S13 hatchback lowered no aftermarket aero, headlights up *was at night*.. dunno about the aerodynamics of s14 KA powered.

I dont really plan on ever running that fast anymore, not with big wheels and body kit..

oh, really? I just go to 110-115 something (my turbo timer display 190km)... on highway 5... but too fast for me tho... i dun have guts to go faster...

HyperTek
10-18-2005, 01:37 AM
takes a long stretch.. i forgot where i did it.. this was off a jdm cluster calibrated to read up to 180mph..

I will never do that again, I never had a speeding ticket and dont ever want one.

240SeXy!
10-18-2005, 01:41 AM
JINX! JINX austin haahahaha JK :keke: :keke:

!Zar!
10-18-2005, 01:55 AM
Not sure of my exact top speed. But with a dohc hatchback 5spd and a auto ecu, my speedo needle was pointing straight to the second digit of my trip guage... It gets kinds scary not knowing how fast you are going.

mr_240sx
10-18-2005, 08:38 AM
well i still got my speed limiter on my sr'd s13 but ive dont 260kmp/h on my gixxer 750! :boink:

golfer17
10-18-2005, 11:05 AM
i cant imagine doing 140 in a na ka24. that thing took so long just to get to around 110, i just gave up even flooring it on the highway. my 3000gt on the other hand gets up to 120 like its nothing (and pretty quickly too) but it still took forever to get to 135 it seemed and by the time i got there it was time to slow down so i didnt pass someone going that fast. 140 with a mostly stock ka? thats gotta take a very long straight, and a very long time without any cars around, i dont know how you could do it without blowing by cars at 100+ which is a very bad idea because you never know when a car could change lanes in front of you.

Gnnr
10-18-2005, 11:58 AM
Oh yeah, tell that to this guy.

R33 doing 300+ km/h over Tokyo Bay bridge
http://www.exvitermini.com/movies/wngn0.mpg

Site has lots of nice vids. If you never seen it check it out (http://www.exvitermini.com).

m072514
10-18-2005, 12:45 PM
Don't post info unless you have proof idiots. KAs can pull up to 140 once fuel and ign cut are bypassed. m072514 you are an idiot to think the front lip could create enough downforce to hold him back, you want front the end to stick. Easiest way is to look at top speed skylines. Not slammed, usually 17s and 18s

Mr. Sideview, let's take physics into account. The coefficient of drag (Cd) is directly affected by the frontal area, which includes the pressure difference beneath the car. This frontal area is INCREASED by the presence of a front lip, increasing downforce, which is A GOOD THING FOR ROAD RACING / CORNERING. However, this topic is about top speed. Lowering the car even one inch can reduce the frontal area by as much as 3 square feet, which is important because the frontal area is a multiplier AGAINST V(max). Positive downforce, or lift, is not really a problem with a car that weighs 2600+ lbs. Also, the weight of the car doesn't matter as much for top speed as it does for acceleration.

but you still follow the same methods of getting the initial quirks fixed before you start going all crazy with underbody components.

The undercarraige of most cars (ours included) is the worst for aerodynamics. A simple belly pan would smooth out the airflow, decreasing drag. It wouldn't cost any more than a couple hundred dollars to fabricate. Ask that Bernoulli guy. He knew a thing or two about aerodynamics.

In conclusion, you could look do like Sideview here and look at JDM TyTe pictures of "top speed" Skylines and begin your analysis there, or you could do what I did and go to one of the top engineering schools in America. I'm not saying I have all the answers, but I do have THIS one... and obviously you don't. Who is the idiot now?

sideview_180sx
10-18-2005, 04:53 PM
Mr. Sideview, let's take physics into account. The coefficient of drag (Cd) is directly affected by the frontal area, which includes the pressure difference beneath the car. This frontal area is INCREASED by the presence of a front lip, increasing downforce, which is A GOOD THING FOR ROAD RACING / CORNERING. However, this topic is about top speed. Lowering the car even one inch can reduce the frontal area by as much as 3 square feet, which is important because the frontal area is a multiplier AGAINST V(max). Positive downforce, or lift, is not really a problem with a car that weighs 2600+ lbs. Also, the weight of the car doesn't matter as much for top speed as it does for acceleration.



The undercarraige of most cars (ours included) is the worst for aerodynamics. A simple belly pan would smooth out the airflow, decreasing drag. It wouldn't cost any more than a couple hundred dollars to fabricate. Ask that Bernoulli guy. He knew a thing or two about aerodynamics.

In conclusion, you could look do like Sideview here and look at JDM TyTe pictures of "top speed" Skylines and begin your analysis there, or you could do what I did and go to one of the top engineering schools in America. I'm not saying I have all the answers, but I do have THIS one... and obviously you don't. Who is the idiot now?

All that schooling to say a flat underbody is better, yet the clk-gtr that went airborne because of flat underbody says other wise. Besides this isn't testing in a lab. Spending hundreds to make an underbody, get some sheet metal and weld it. You use facts and figures, so go out and test your theory. Why use computers and formulas when you can just use what has already been in use for awhile. Quit trying to re-invent the wheel. Besides search Matchless Crowd Racing, they use real world items, search and see what they do. You speak of front downforce so much, have you felt 240s get light in the rear above 150, get up to that speed first then make suggestions. Don't make suggestions from a lab when you aren't the one on the track or driver seat.

luckie2hav3her
10-18-2005, 09:22 PM
as long as im faster than a cop when he see's me going 100+ im straight, gg no re

axiomatik
10-18-2005, 09:29 PM
All GT race cars and all modern supercars have a flat underbody to reduce drag. You also can't really get any use out of a rear diffuser without a flat underbody. Just because a single version of a Mercedes race car had some unstable aerodynamics doesn't mean that a flat underbody doesn't reduce drag. That Mercedes also had a spoiler, that doesn't mean that having a spoiler will make your car flip over too.

luckie - you'll never be faster than a Police radio

theicecreamdan
10-18-2005, 09:39 PM
and if you run, chances are they will get your plates and be waiting at your house.

theicecreamdan
10-18-2005, 09:41 PM
i cant imagine doing 140 in a na ka24. that thing took so long just to get to around 110, .

It was never very hard for me to bounce off my speed limiter.

Jcb890
10-18-2005, 09:42 PM
All that schooling to say a flat underbody is better, yet the clk-gtr that went airborne because of flat underbody says other wise. Besides this isn't testing in a lab. Spending hundreds to make an underbody, get some sheet metal and weld it. You use facts and figures, so go out and test your theory. Why use computers and formulas when you can just use what has already been in use for awhile. Quit trying to re-invent the wheel. Besides search Matchless Crowd Racing, they use real world items, search and see what they do. You speak of front downforce so much, have you felt 240s get light in the rear above 150, get up to that speed first then make suggestions. Don't make suggestions from a lab when you aren't the one on the track or driver seat.

thats a lot of "facts" and strong opinions for someone that saying having a flat underbody is bad. tisk tisk. ;)

Jcb890
10-18-2005, 09:45 PM
All GT race cars and all modern supercars have a flat underbody to reduce drag. You also can't really get any use out of a rear diffuser without a flat underbody. Just because a single version of a Mercedes race car had some unstable aerodynamics doesn't mean that a flat underbody doesn't reduce drag. That Mercedes also had a spoiler, that doesn't mean that having a spoiler will make your car flip over too.

luckie - you'll never be faster than a Police radio

+1. good points.

MakotoS13
10-18-2005, 10:05 PM
i doubt its completely flat. some air WILL be under the car so some air ducting (however subtle) is probably there. like a riffle here and there to help air move out from under the car to reduce LIFT. easing the release of this air by decreasing turbulence should be very beneficial. if we could make the 240 flat on the bottom (not very practical) you'd be surprised at how smooth and fast it could be given the right suspension setup at high speeds. the top of the car is about as good as it gets (till you get to the tail where it drops off and creates drag between the bumper and tailights).

whatever, its nite for me.

Jcb890
10-18-2005, 10:12 PM
i doubt its completely flat. some air WILL be under the car so some air ducting (however subtle) is probably there. like a riffle here and there to help air move out from under the car to reduce LIFT. easing the release of this air by decreasing turbulence should be very beneficial. if we could make the 240 flat on the bottom (not very practical) you'd be surprised at how smooth and fast it could be given the right suspension setup at high speeds. the top of the car is about as good as it gets (till you get to the tail where it drops off and creates drag between the bumper and tailights).

whatever, its nite for me.

i believe i've seen the underbody of a couple racing cars from pics online and its not 100% flat, but everything is covered and the only things making it not flat are for cooling and to reduce lift while keeping drag at a minimum.

TheSnail
10-18-2005, 10:14 PM
You should of seen my mr2 turbo. I dont know if yall have looked under one of those things but it is nothing but plastic panels and pure flatness (I was impressed). How else could they make the 165rwhp car go 147mph stock. Driving it at 100mph, I had to tell the passenger to look at the speedo for them to believe we were going 100. As for the s13, look at your passenger next time your going 85mph+, see if they're holding the "oh shit" handle.

waynehead05
10-18-2005, 10:21 PM
I believe there's a nismo gear that you replace 5th with to get over 160 in the 240. I dont think the gearing is correct for very high speeds in our cars. Not sure. And there are public roads that aren't regulated= no speed limit.

MakotoS13, have you checked into Aero kits? I'm sure you have, I've read of companies in japan that design aerodynamic body parts, hence Aero kits and not body kits, but they cost a lot, dont know it there are any for the S13.

BTW, does anyone have a video of a 240 topping out? I was looking for one the other day, would be great for my video collection. :D


yes there is a gear to do that. the KA revs out at 167mph according to math. if you want to go faster you could always swap out the r200 rear end for 300zx rear. that'll put you in the 187 mph range.

sideview_180sx
10-18-2005, 10:59 PM
If you're asking this just to be able to run from cops, hopefully you get caught...idiot!!! Here I am thinking you had a legitamate reason, don't do any flat underbody, just build the motor so you can go fast then crash and hit a wall.

Gnnr
10-19-2005, 07:36 AM
Nah...I don't think anyone is trying to run from the cops here, afaik. Just discussing top speed possibilities.

chibo
10-20-2005, 06:50 AM
All that schooling to say a flat underbody is better, yet the clk-gtr that went airborne because of flat underbody says other wise.
Those GTRs went airborne because of the track... A sudden loss of downforce because of the huge elevation drop when coming down the hill + flat bottom + 200mph+ = Let's go fly............. :sadwavey:

A flat underbody is still better.

---
As for me... a 290whp SR20 in a S13... I'm sorry, but anything over 100 is not stable in a S13. Heavy rattling, shimmy, everything... These cars are just too old and plain not engineered to sustain that kind of speed safely.

Omarius Maximus
10-20-2005, 02:37 PM
Well, high speeds with 240 aero dynamics= lift. The key to "proper" downforce isnt a giant wing or splitters or lips. Its all about how low you can make your car go. Also instead of underbody diffusors, a set of aluminum side skirts that go really low to the ground would work equally well.

m072514
10-20-2005, 05:56 PM
All that schooling to say a flat underbody is better, yet the clk-gtr that went airborne because of flat underbody says other wise. Besides this isn't testing in a lab. Spending hundreds to make an underbody, get some sheet metal and weld it. You use facts and figures, so go out and test your theory. Why use computers and formulas when you can just use what has already been in use for awhile. Quit trying to re-invent the wheel. Besides search Matchless Crowd Racing, they use real world items, search and see what they do. You speak of front downforce so much, have you felt 240s get light in the rear above 150, get up to that speed first then make suggestions. Don't make suggestions from a lab when you aren't the one on the track or driver seat.

owned! ...by other knowledgable zilvians and myself!!! im not gonna beat the dead horse, but what i am going to do is ask that you dont make assumptions about me. yes, i have spent time and continue to do so in a lab. i would much rather talk cars with a physics or engineering professor who has extensive experience in the world of motorsports than some kid with a 3" muffler and stickers on his civic. but who is to say that i am not out there actually testing this data in the real world? how do you know how many track days or drift events, or autocross experiences i have had? you dont.

here is my suggestion, sideview:
1. humbly gleam as much as you can from people who are more knowledgable than you, whether on this forum or in a "lab."
2. gain an immense respect for the laws of physics and you will be better equipped to go faster, turn harder, and stop safer.
3. stop trying to insult people. youre hardcore attitude reflects nothing on these boards. it only works to embarrass yourself.

happy motoring,
-jack

WideS13
10-20-2005, 06:51 PM
If you run out to the hardware store and grab stuff to make the bottom of your car *flat* to go faster, your gona screw yourself. You just made your car more efficent at going flying. The race cars you see all take advantage of the high pressure area under the car (that would otherwise just make lift) and either vent or duct it to in a manner that it is creating more downforce. Two of the type of ducts used are convengent ">" or divengent. "<". The convengent duct will increase pressure, but decrease velocity. The divengert (hint: diffuser) will cause a decrease in pressure but an increase in velocity. Now that you know that, all a diffuser is, a angled peice that directs airflow back while tapering upwards. It helps increase the speed of the air going under the car and helps decrease aerodynamic lift by closing the airspeed gap between the airflow over and the airflow under the car. Next time you go flying somewhere in a big commercial jet, look at feel what hapens when they lower the flaps when you come in to land. You'll see that the flaps angle down, slowing the air under the wing and you'll feel the immediant effect of the added lift. A Diffuser is just like a wing flap for your car, except the whole thing is upsidedown.

Oh, and sence we have Mr. I go to an uber school, I'm a flight engineer for the Marines and a qualified turbine engine mechanic so if you want to argue aerodynamics, bring it on. :D

drift freaq
10-20-2005, 06:51 PM
yes there is a gear to do that. the KA revs out at 167mph according to math. if you want to go faster you could always swap out the r200 rear end for 300zx rear. that'll put you in the 187 mph range.
eh get your rear ends right. a NA 300ZX rear end which is a R200 has the same gears as our cars. A TT has a R230 (3.70 gears) differential it will not bolt into our cars. different driveshaft and output flanges.
You could bolt in a J30 diff. which has 3.92 gears.

SW20Racer
10-20-2005, 07:19 PM
somehow posted in wrong section. oops. delete or whatever.

m072514
10-20-2005, 08:02 PM
Oh, and sence we have Mr. I go to an uber school, I'm a flight engineer for the Marines and a qualified turbine engine mechanic so if you want to argue aerodynamics, bring it on. :D

WideS13, im not saying i go to an uber-school, OR that i wanna argue aerodynamics. in fact, i agree with everything you said above. im just saying that looking at websites and reading magazines is a poor substitute for actually studying the mechanics and physics of cars.

here is my suggestion, sideview:
1. humbly gleam as much as you can from people who are more knowledgable than you, whether on this forum or in a "lab."

i was talking about people like you. -jack


P.S. i appreciate your service in the marines, sir. i am a MIDN 2/C at the US naval academy, in annapolis. i will be receiving my commission as a 2LT in the marine corps or an ENS in the navy in spring of 2007. my best friend is a CPL at 29 Palms and is going BACK to iraq in january. again, thank you for your service. ill be joining you in the fleet soon.

S14DB
10-20-2005, 08:13 PM
I going to Home Deopt for some 3ply tommorow!!!

ryan hagen
02-09-2006, 07:27 PM
a guy i know has a stock engine ka24de, in a 91 coupe, its a factory freak cause it beat 3 other 240sx's with headers and intakes, but he raced our other friend in a z32 300zx 91, they raced until the z32 hit its speed limiter and my friend passed the z while it was on its limiter. i dont know what a z is limited at but he said against his dads vette they hit 140, the 240 takes awhile to get there, but his has no speed limiter. i ve been with him once when he maxxed it out it stopped at 5500-6000 ish in 5th and just couldnt rev or move any faster, the needle was way burried.

i work on alot of vipers, mainly just take them apart, and the 03+ have a piece that goes from the front bumper bottom back under themotor, leave the oil pan stick out, then the tunnel has a cover, floor pan is flat, then the tunnel cover goes back to a rear cover that has a scoop to direct air by the diff. then a cover off of that one that meets the bumper, then holes in the rear bumper to let that diff air pass through with out haveing the parachute effect. so basically the air only hits object under the car that it should cool. and the front bumper has all kinds of air deflecting stuff all over in it. it even has the little spliters below the rear bumper. crazy cars, now if i can only get my boss to borrow me his.

i did pick up a pair of viper gen3 seats from him though to put in my car, i think next is a pair of gen2 brembo calipers to replace my z32 calipers.

TibDrifter
03-16-2006, 12:48 PM
165 @ 7000rpm in my sr s14 @ 1 bar boost.(mines ecu) dont need to go anymore faster and please dont try.

Nan Desu Ka?!
03-16-2006, 01:12 PM
a guy i know has a stock engine ka24de, in a 91 coupe, its a factory freak cause it beat 3 other 240sx's with headers and intakes, but he raced our other friend in a z32 300zx 91, they raced until the z32 hit its speed limiter and my friend passed the z while it was on its limiter. i dont know what a z is limited at but he said against his dads vette they hit 140, the 240 takes awhile to get there, but his has no speed limiter. i ve been with him once when he maxxed it out it stopped at 5500-6000 ish in 5th and just couldnt rev or move any faster, the needle was way burried.

i work on alot of vipers, mainly just take them apart, and the 03+ have a piece that goes from the front bumper bottom back under themotor, leave the oil pan stick out, then the tunnel has a cover, floor pan is flat, then the tunnel cover goes back to a rear cover that has a scoop to direct air by the diff. then a cover off of that one that meets the bumper, then holes in the rear bumper to let that diff air pass through with out haveing the parachute effect. so basically the air only hits object under the car that it should cool. and the front bumper has all kinds of air deflecting stuff all over in it. it even has the little spliters below the rear bumper. crazy cars, now if i can only get my boss to borrow me his.

i did pick up a pair of viper gen3 seats from him though to put in my car, i think next is a pair of gen2 brembo calipers to replace my z32 calipers.


Im still very confused.... what happend to all the periods? and why did you bump this old as thread to talk about vipers??? :ugh: