Has anyone worked on the aerodynamics of the 4gen,picks would be nice

The underside rear looks like a paraschute

i´m thinking of doing something to improove it other then a cowl

 

hope that helps

brandon

 

did taping up the front fascia and such help your times any? and im in the same boat after doing a TD echaust setup i now have the huge parachute in the back ned with no muffler there. that has to catch air.

 

thats what the third pic is of. i put a thin alum. plate in there to help w/ air flow..... then what i did was put 2 holes on each side of the lisence plate to allow any trapped air to escape.... then i put my lisence plate on a hinge at the top of the plate and cut out behind the plate so that more air can escape

-brandon

 

If you want aerodynamics just lower the car, all that stuff under the car is useless unless you're running 200+ mph.

 

well it dosen´t matter if i lower the car the rear aeria is still an air trap

Anybody running in the 10s change to a cowl? do you have any gain numbers

If you have looked under Porche and such cars you see the diffrence

 

demonicbird - you should tape up the car and run a few passes - then take off the tape and the aluminum piece and run a few more passes.

post time slips.

 

ill try to do it.....the back aluminum piece may be tricky tho... i but the screws into the old heat shield holes and dont wanna strip them out by removing and reinstalling.....

but i will do the tape.... that will show mph

lemme go get a few more pics of the L plate and ill post them

-brandon

 

-brandon

 

Look around on the net and see if you can find anything that was done to the IROC cars.

My opinion, the IROC cars, equal cars different colors and drivers. Isn't that almost the car of tomorrow in NASCAR today?

A grumpy sometimes angry old man and his dog - Jake

 

The biggest thing you can do to any car to reduce aero dynamic drag is lower the car. Reducing the frontal area will effect drag more than anything else you can do, second thing will be closing off areas in the front that will trap air, openings, air ducts, head lights.

 

me running 13 flat at 107. would taping the front be worth it at all for me? im guessing it wouldnt even take half a tenth off my times.

 

the ta bumper is full of holes in the front...clean it up and you should see gains look at nascar there arent any opening in the nose of there cars....

if all that stuff is useless under the car under 200mph then what is the purpose of ferrari,porsche,vettes,lambos etc. having belly pans and rear defussers those cars dont cruise at 200+

like w/ weight everything adds up

-brandon

 

I like the idea of better aerodynamics. I agree, every little bit adds up. I couldn't see the harm in using some of these techniques at the track.

I think this would be alot of use to the fellas doing Silver State, bonneville, high speed road course work and stuff like that as well.

 

lexus for years have been doing undercarriage aerodynamics to improve power at higher speeds and gas mileage

 

Ding Ding Ding we have a winner! This is correct. There is not enough air under the car to have an adverse effect to aerodynamics. Closing off the openings will help, but just like he said lowering the car will have the most effect. Other items would be remove the mirrors, windshield wipers, and antenna. The angle of the windshield is very favorable. Once you lower the car a add a diffuser to allow less air to get under the car.

I would suspect that a lot of the exotics are done that way because of the percieved benefits.

Trust me, I have a Nova that is wide open under the trunk area. If it was worth anything we would have covered it. Why do I say this? My best freind does components for all the major Pro Stock Chassis builders. He has been in the Lockheed wind tunnel as well as the GM wind tunnel. He knows a little about areodynamics

It's nice to see guy thinking and trying their ideas. Test test test, sooner or later you will find somehting that bill benefit your combination.

Robin

 

i also remove the side mirrors as well. theres a few other things i wanna try in the wheel wells as well

-brandon

 

well thing is trust me when the stock muffler is gone and you run a TSP dual exhaust. the back bumper Catches a HELL of alot of air. is it like a Giant C shape facing towards the front.

stick your hand out the window at 70mph feel the push against it imagine something with about the air cathcing surface area of a umbrella basically. i just cant see that not hampering the car some. but then again mabe their really isnt that much air pushing underneath the car.

 

gxp.... yeah i know what your talking about.... i have the TDs on the car...and after removing the rear bumper support its def like a parachute back there.... do you understand the pics i posted w/ the aluminum plate back there? and also thats the reason for cutting out behind the lisence plate to allow any air back there to leave. i want to eventually close the whole back end up

-brandon

 

I aggree with lowering the car and you allways try to get as close but the rear is still bad for aerodynamics

To see if there is any benefit from it is to hook up a digital pressure sensor and monitor the pressures before and after modifications

The Nova is diffrent to 4gen.so you can´t compare them but there is definetly a diffrence from doing so but to monitor the change in 1/4 pass times is hard,cause of the 100 variables in every run