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09-06-2003, 09:37 AM | #1 |
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Auto-X and tires...
Well... I can't be competitive in the SM class with Bridgestone Bald Potenzas. Last weekend, we had a rapid course. The kind of course that you hit 65-70mph (120kph) with no really tight turns. The kind of course you'd need power AND grip. I had the power, but I had no grip. On a 50 second course, I'm 3.5 seconds back of the leader.
Next year, I'm getting some R's... Here's a few pics:
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09-06-2003, 11:26 PM | #3 |
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The potenza's didn't like the yoko sticker and were treating you like a traiter. Maybe you should run yoko's if you are going to have a yoko sticker :-) I don't see Ferrari wearing yoko stickers and they seem to win on "bald" potenza's. looks pretty good though, no tires off the ground not gripping or anything. how much boost did you run in the event?
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09-07-2003, 01:07 AM | #4 |
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Oh... Maybe that's why...
Actually, the Yoko sticker is there because they sponsor all our events in the area and it is "polite" to them that we shove some stickers on the car for pictures... Next year, I'll probably run A032R for Auto-X and ES100 for street. As for boost, I was running 10 psi. Had so many problems with the car that weekend. First, I came there with a faulty hydrolic clutch system. Clutch was soft, hard, stuck to the floor. I took out the damper box the day before and bleed the system. Nothing changed. I order a new slave cylinder from Nissan, hopefully that will fix the problem. So my 1rst run was screwed up. I was fighting with my car. In between my 1rst and 2nd pass, my e-fan broke. So I ran my 3 last runs with no e-fan. Managed to get better times, but it kept bothering me. I also believe I'm scared of my car. Too much power, little grip, very nervous engine. I can't seem to be able to floor the pedal on straights and to take the corners more agressively. I brake early, accelerate late... I hope I'm going to shake that off next year because it annoys me a lot.
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09-08-2003, 08:37 AM | #5 | |
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Allen Delta Region SCCA SM 1990 240SX SR20DET |
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09-08-2003, 09:46 AM | #7 | |
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Keep in mind that we have some events in the rain...
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09-08-2003, 09:47 AM | #8 | |
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Quote:
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09-08-2003, 09:50 AM | #9 |
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same deal with the RA-1. The RA-1 is the spec tire for the camaro mustang challenge road races. Some guys report running an entire season on one set of those. That should tell you that they're no good for autocrossing. Don't worry about the rain. The kumhos are still good in the rain when they are new. If it rains, you will slide around, simple as that. If it's dry, you will be slower than you're competition if you're not on kumhos or hoosiers.
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Allen Delta Region SCCA SM 1990 240SX SR20DET |
09-08-2003, 10:15 AM | #10 | |
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Would running street tires in rain be more acceptable than running Hoosiers? And what model of Kumho's are we talking about?
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09-08-2003, 10:26 AM | #11 |
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it depends on the conditions. If the majority of the track is covered in standing water then the street tires would be better. if the track is just wet then kumhos would be better. The kumho I am talking about is the victoracer or Ecsta autocross tire. yokohama did just come out with a softer compound for the A032R. Grassroots Motorsports is testing them on a Mini Cooper S at the National Championships this week. It'll be interesting to see what they think of the new tire.
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Allen Delta Region SCCA SM 1990 240SX SR20DET |
09-08-2003, 10:36 AM | #12 |
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While we're talking about tires, what's the difference between a heat-cycled tire and a regular R tire?
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09-08-2003, 11:04 AM | #13 |
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another point is that the yoko's are MUCH more expensive than the Kumho's.
Get a harness, and s14 seats. Just having the harness will hold you in the seat better, and increase your ability to drive the car in a more controlled manner. Since your auto-xing even a 4-point harness would help dramatically.
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09-08-2003, 11:46 AM | #14 | |
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Quote:
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09-08-2003, 11:54 AM | #15 |
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The 4 point y-type harnesses are fine for what you are doing, you don't need a cage to use them. A heat cycled tire has been brought up to it's ideal operating temperature and allowed to cool back to ambient. This is done because the compounds have more grip once they have been heated one time. Too much chemistry to go into. IMO, it's not worth paying the extra money tire rack wants for heat cycled tires unless you plan on running them at nationals without using them beforehand.
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Allen Delta Region SCCA SM 1990 240SX SR20DET |
09-08-2003, 12:00 PM | #16 | |
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Quote:
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09-08-2003, 12:47 PM | #17 |
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two lap straps bolt to the rear seat floor bolts.. shoulder belts can be attached to the rear seatbelt mounting points.
Check this: http://www.soloracer.com/harnessbelts.html
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09-08-2003, 01:07 PM | #18 | |
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09-08-2003, 02:14 PM | #19 | |
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sykikchimp: Basically, I have to drill the floor in order to install the 2 lower points of the 4-pt harness while my 2 shoulders points should both be on the rear shoulder point of the rear seatbelt? I thought I could use both lower stock points for the 4 point harness and the strut bar for the higher points. Would that work?Ã* And what about the 3 point harness? Is that any good?
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09-08-2003, 02:51 PM | #20 |
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If I was to use a 4 point, I would mount the two lap belts to the exsisting bolts that hold the seat rail in the back. Maybe use the exsisting seatbelt bolt on the right side of the driver.
I would mount the 2 shoulder belts to the rear seatbelt lapbelt mounting bolts. Where the little latch peice that pop through the rear seat are attached to the rear deck. You could use the rear seatbelt mounting point from the c-pillar (hatch frame rail), but I hear it being kind of at an angle allows it to slide around a little while your wearing it. Doesn't hurt to try both ways. The 3-point will work just as good as the 4-point. Just easer to install. I wouldn't mount the belts to the STB, because it's not meant to hold you if you do hit something. Say you have an encounter with a concrete based light pole.. I wouldn't trust the strut bolts to hold ****.
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09-08-2003, 02:56 PM | #21 | |
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Quote:
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-> HaLo Race Car: '98 E36 BMW M3 Daily Driver: '08 Fiji Blue Honda Civic Si SOLD: 01 GPW Honda S2000 PARTED: 93 Pearl White 240SX LE Fastback w/SR20DET SOLD: 93 Super White 240SX SE Convertible w/Silvia Front |
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09-10-2003, 12:23 AM | #22 |
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im pulling out of auto'x for track schools instead. more money, but it'll be good. ill probably go to a few though to keep my skills up. i do pretty well, usually one of the top 3 on street tires. there is a pesky WRX and my room mates SER that get in the way alot though. its nice to see the 240's getting into it though. there are a few local drifters that go to them for some skill improvement. thats always nice to see!
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09-12-2003, 09:26 AM | #23 |
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sykikchimp:
I followed your advice and got some s14 seats.. I can't believe what a difference only the seats make.. Can't wait for my harness to come in!
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09-12-2003, 01:02 PM | #24 |
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They made a big difference for me too.. they have much better side bolstering.
just a heads up, but you loose about 1-2" of leg room with the s14 seats as long as the lapbelt at the right rear corner of the seat is there. The s14 seats hit it.. the s13 didn't. You have to install the manual seat belts (s14 or Canadian s13) to gain the space back. probably not an issue for you, but it is one I thing I plan to do.. I'm 6'4" though.. so leg room is a comodity EDIT: Nevermind.. I just noticed you already have Manual belts.. DAM CANADIANS!! lol
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09-12-2003, 01:27 PM | #25 |
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does anyone remember the old S13 seat modification that used to be on the 240sx.org site?? i pulled the seat covers and foam off my s14 seats and noticed that you can *sorta* do the same. just used a large crescent wrench and a pair of pliers to bend the frame of the seat in slightly. Tried to get it so I could fit into the bolstering a bit "deeper". Kinda works. Some people actually notice the difference, some don't (basically... it helps ever so slightly).
I should've done a writeup on it but it's way too easy to do....
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09-12-2003, 02:21 PM | #26 |
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you can get a sparco speed for like $250. it helps SO much. like you dont worry about sliding around, u just drive. my seat was one of my favorite mods! and it looks damn cool, it shows u mean buisness!
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09-12-2003, 02:39 PM | #27 |
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sykikchimp:
Lucky us that the auto belts are illegal in Canada. The don't pass safety inspections. Ace: A friend with a S14 did it with his car and it makes a big difference too. I plan to do it on my S14 seats too. They are a tiny bit wide. (I'm on the skinny side. ) hurleyboi514: Considering I paid 250CDN (~180$) for both seats, I believe I got a steal. I plan on getting 1 Bride seat with rails in the long run. For the moment, those S14 seats will do it.
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09-14-2003, 05:50 PM | #28 |
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I have a lame little write up of how I installed my 4 point harness without a roll-cage, for autocross
http://members.dslextreme.com/users/...x/harness.html |
09-14-2003, 06:40 PM | #29 | |
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Quote:
It's still not a racing seat, but at least any amount better than stock is good.
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