View Full Version : rx7 hood
RacerBoy
09-27-2006, 09:26 AM
does any1 have pics of a functional rx7 scoop on a 240??? Broke so cants affort cf for now.. plus i want to start learning basic body work shit....(glassing, molding, etc.)
were can i get a replica (fiber scoop).... i found one on ebay (real deal) but i dont want metal though.
http://www.jcar.biz/image00318.jpg...
chmercer
09-27-2006, 11:08 AM
rx7 hood scoops arent functional in the first place
Dousan_PG
09-27-2006, 11:10 AM
hahahaha
omg one of thse posts
please stop
Flybert
09-27-2006, 11:49 AM
Put one on your roof too. That shit would be tight.
91rps13
09-27-2006, 11:52 AM
huuu square-ish!!!!!!!!!!!!!!!!
rsxrcr87
09-27-2006, 02:07 PM
i thought they went to the intercooler?
they do go to the intercooler. but on a 240sx it wouldn't be functional.
http://i21.photobucket.com/albums/b271/KasheMoney/1156597670256.jpg
HyperTek
09-27-2006, 02:25 PM
rx7 hood scoops arent functional in the first place
Top mount intercooler
LB.Motoring
09-27-2006, 02:32 PM
Ouch.
insertfoothere
91rps13
09-27-2006, 02:37 PM
any source of outside air to the engine is fuctional
LB.Motoring
09-27-2006, 02:43 PM
and thats why you live in texas........ the motor loves to obsorb air from its block... :doh:
plays the spoon and harmonica :keke:
in reality, its really not needed kid, its ok.. :keke:
any source of outside air to the engine is fuctional
correct, that's why cars are designed to GET air from the front end of the car. it brings the air in, hits the top of the hood
http://img242.imageshack.us/img242/5462/enginezo1.jpg
anyone want me to draw a pic of a hood with a inverted scoop?
91rps13
09-27-2006, 03:21 PM
draw it pikazooooo.... jk good drawing man
chmercer
09-27-2006, 04:15 PM
fc hood scoop is retarded because it was designed in the 80s and the aerodynamics is completly wrong. no air goes into that scoop. the air flow misses it by like a foot because of the bumper angle. it might work if it was like the sti scoop which is really tall to account for the shit ass brick shaped subaru front end
wootwoot
09-27-2006, 04:51 PM
Yeah its definitely functional....Are you just speculating here?...It even has aerodynamic elements designed into it.
big_schaf
09-27-2006, 04:56 PM
correct, that's why cars are designed to GET air from the front end of the car. it brings the air in, hits the top of the hood
http://img242.imageshack.us/img242/5462/enginezo1.jpg
anyone want me to draw a pic of a hood with a inverted scoop?
unreal drawing:wackit:
chmercer
09-27-2006, 05:11 PM
Yeah its definitely functional....Are you just speculating here?...It even has aerodynamic elements designed into it.
please elaborate on these "aerodynamic elements designed into it". because im seeing a mail slot cut into a hood.
if the nose didnt dip down like it does at the front, the scoop would catch a very small amount of air due to the opening being hella small, but as it sits, it gets practically no airflow because the front bumper angle ramps the air up over the scoop inlet, plus the fact that air would want to try to exit the engine bay from that scoop making it a high pressure area.
its a worthless scoop
would be better performance wise if you just cut a square out of the middle of your hood
HyperTek
09-27-2006, 05:16 PM
under defuser must not do anything either becuase the car is soo low.. why would air be under there? I only know drifting and thats it.
aznpoopy
09-27-2006, 05:17 PM
fc hood scoop is retarded because it was designed in the 80s and the aerodynamics is completly wrong. no air goes into that scoop. the air flow misses it by like a foot because of the bumper angle. it might work if it was like the sti scoop which is really tall to account for the shit ass brick shaped subaru front end
the t2 hood scoop isn't perfect, but it is functional.
it's been tested by old school rx7club members. its useless until you start going faster than 45mph. up to 45 mph, hot air actually comes out of it. 45mph+ it starts taking air in.
voila
http://www.rx7club.com/showpost.php?p=657357&postcount=31
HyperTek
09-27-2006, 05:21 PM
crack your window open about an inch,.. what happens?? imagine this on the front of the car, but in a smaller concentrated area like the center of teh hood.
LB.Motoring
09-27-2006, 05:21 PM
please elaborate on these "aerodynamic elements designed into it". because im seeing a mail slot cut into a hood.
if the nose didnt dip down like it does at the front, the scoop would catch a very small amount of air due to the opening being hella small, but as it sits, it gets practically no airflow because the front bumper angle ramps the air up over the scoop inlet, plus the fact that air would want to try to exit the engine bay from that scoop making it a high pressure area.
its a worthless scoop
would be better performance wise if you just cut a square out of the middle of your hood
lets not get too hella technical... if you cut a square out, it would actually pull air opposite than the scoop. the air flowing into the bay from the front would push air up and out of your technical "square hole"
heres something that is worthless...
http://www.fc3s.org/car_of_the_month/images_november_2002/attack.jpg
aznpoopy
09-27-2006, 05:27 PM
crack your window open about an inch,.. what happens?? imagine this on the front of the car, but in a smaller concentrated area like the center of teh hood.
bad analogy...
for one thing, the air inside the cabin is not hot as hell.
for another, you dont sit over a gaping hole with air rushing up at you.
HyperTek
09-27-2006, 05:29 PM
^^ HEHE ok ok, but you do feel a change in pressure, and give or take, an intercooler is a heat exchanger
aznpoopy
09-27-2006, 05:31 PM
lol hyper... :) well you are right that it IS functional. see my above above post. its just not taking in cool air until 45mph+
backroadtouge
09-27-2006, 05:34 PM
step one: take off hood.
step two: ??????
step three: Profit.
wootwoot
09-27-2006, 05:55 PM
The hoodscope does have some unvisible dividers within it to direct air evenly across the intercooler. Why would Mazda put that there if it diddnt even do anything?...
chmercer
09-27-2006, 06:02 PM
i didnt say it dosent do anything, i said it was retarded. obviously it isnt goign to be designed with function before style because they have to sell to the general public. it dosent have dividers it has a rubber accordian thing that is supposed to seal around the intercooler hole. if you could manage to flip the scoop around it would flow way more. as it sits, the intake air has to fight the high pressure of the engine bay which is stupid and just makes hella turbulence. if it was backward it would suck air through the front bumper and up through the bottom of the intercooler (not really because the intercooler is like smack on top of the intake manifold).
cliffsnotes - forward facing scoops are generally retarded, especially ones made in the 80s, similar to how intercoolers baking on top of your engine are retarded.
McRussellPants
09-27-2006, 06:23 PM
UUUUUUUUUUUUGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHH.
Zilvia, just stop trying to figure out aero dynamics, please. its like watching someone break their knuckles with a hammer.
T2 scoop is retarded on FC becuase the huge angle from the front bumper to the hood seperates the air flow off the hood at highspeeds. its called a boundry layer, and on cars like the Impreza and FC its huge due to the front bumper angling the air up so hard.
T2 hood scoop on a 240 would be retarded, assuming it actually works and gets clean laminar air, its just gonna make a high pressure area under the hood behind the radiator and under the car making air less willing to flow through the core and amounting to more lift or less downforce.
Hypertek, just shut up you stupid motherfucker, damn. want to know what happens when you crack your window? air flows in because unless you drive a total heap of shit it will be laminar/highpressure in that area. then, you lose rear down force since theres less total flow over the rear of the car. any retard with wikipedia knows how a diffuser works so you can stop prancing around like you know shit now.
And Charlie is right, a square hole in the case of the FC and most likely any other snub nose car would probably would pull as much air. reguardless of it being laminar its still a high pressure area, the scoops not so much "scooping" air, its just alowing air to push itself in.
If you want to pull air out you need to force a low pressure condition, which you would do with a small flap at the front (which only works in laminar flow). if its in a boundry layer your really just allowing the air pressure to push itself out, which is unlikely since the pressure in the engine bay is probably lower than that above the hood.
Fuck, Im not even in fluid dynamics and I know this is true. You dudes need less internet and more books.
Why would Mazda put that there if it diddnt even do anything?...
Thats the worst logic ever. why would Mazda use the rotary if its less effecient? why would they use DTSS if it makes the car less consistant around a racetrack?
Why? its because stupid douchebags will gobble it up as a novelty and then be able to tell all their buddys they have a "cutting edge racecar"
HyperTek
09-27-2006, 07:25 PM
thanks for the personal attack =D
exactly, bust your windshield, and air comes in.. its a no brainer... same goes for the "functionless" scope on a FC at 45+mph as stated above..
koukimonster139
09-27-2006, 07:30 PM
lmao @ mail slot..
youknowwhoyouare
btw get the fricken scoop and see what it does. if its no good you have a hole in your hood thats supposedly better than a scoop.
wootwoot
09-28-2006, 02:24 PM
I do drive an rx7 you "douchebag". DTSS was put on the cars because a lot of people with first gens complained about them being too tail happy. The top mount was done because Mazda has a hard on for top mounts with the lack of piping, easy servicing, and easier packaging. It was prooved by someone with instruments that it works, so what are you bitching about? The hood scoop does have dividers within it. You can even see them in the picture of the gray rx7. My top mount is going to be running over 100% efficency anyway so I'm not worried (thank you methanol/water injection)
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