Rage13

When I'm going about 120-130 mph the nose starts to feel very light and I sometimes feeling like I'm kinda fighting the wind from pushing me left and right.. I have plans for a fiberglass hood, tubular k-member/a-arms and LS1/T56. And I have a feeling these are going to make it worse. So what can I do to keep the nose down where it belongs?

I've thought about making a fiberglass pan under the car to smooth everything out, but have heard unless its very, very low (like formula 1 car low) it would actually make the problem much worse.
So any ideas?

DoBeR

iTrader: (1)

What about a larger front spoiler?? I remember seeing some pictures of a guys car that had a big front spoiler that came a few inches out past the lower gfx. It looked pretty decent but Im no aerodynamics expert but would something like that help?

FLYNLOW92rs

iTrader: (53)

Drop it to the ground...

Fender Vents help to lower the front end at high speeds....

vsixtoy

Duct tape the front grill closed, And watch your temp gauge to make sure your still doing O.K. there. Thats a little tip I picked up from watching NASCAR. git-r-done

Rage13

Dober, I know the pic your talking about. I bet that would work, but I would end up trearing that thing off before I got to work..

Flynlow, I plan on droping it, just don't know how much yet. I had no idea those fender vents of yours would lower the front end. I've wanted to add something like those to my car sence I saw yours, just trying to find a way to do it and not look like I totaly ripped off your idea.

Vsixtoy, car already over heats..

vsixtoy

Rage, You know I was kidding
On a serious note: More strut/shock rebound force will do wonders for highspeed control. Its hard to beat a go set of Koni yellows for this situation. My next struts will psitively be some custom GroundControl strut assembies.

"What is harsh at 40mph, is perfect at 140mph, and spongy at 240mph"

ME Leigh

Chin spoiler, belly pan and headlight covers.

paul_huryk

You will need to vent the hood as there is a lot of air piling up under it and giving the front end lift. You can reduce it otherwise by having a lower front spoiler (so less air makes it under the car). Your shocks are probably not up to par either.

Rage13

shocks are close to shot, just can't deside witch ones to go with yet.
headlight covers are an idea. any idea if the clear ones are still made?
i've still heard mixed things about the belly pans, i would really like to try it out but that would really suck to find out it don't work at that speed...

vsixtoy

If you are driving the car at 120+, there is only one aftermarket over-the-counter Strut assembly to consider that has the damper force you need = Koni Yellows.

Lets put it this way. If you were to slam a basketball into the ground at 120mph, how high do you think it would bounce from the force exerted? It alot more than bouncing it into the ground at 60mph. The faster you drive, the higher the damper rate the shocks need to control the spring frequency when it recoils further.

Now this only goes to a certain point- so yes you can have too much force. But not with an over-the-counter street performance shock/strut, not even close.

Too much rebound will cause the tire at high speed to glance over imperfections in the road and not return to the ground fast enough for the next imperfection. Asphalt roads are not bad, but do some speed on concrete and you'll experience this at a much slower speed than asphalt. It makes the car jittery at high speeds (were talking mainly over 120mph, but really depends on the car and areodynamics, and several other factors)

rx7speed

seems with the second gen rx7 crowd the KYB AGX has some good luck also with being a nice shock.

vsixtoy

Yes very much so. Its alot lighter car and the adjusting rates of the dampers range is more fitting to accepting very high speed performance in KYB's quality range

Rage13

those Koni Yellows are looking pretty good right about now, one more thing on the list.

how much do you think scoops under the front of the car would help? i've got an idea to put 3 scoops under the front, big one under the middle for the rad (with vents in the hood and fenders) and 1 smaller scoop on each side right infront of the front tires for the intercoolers and duct the air into the front brakes.
sound like something that mite work?

ME Leigh

What do you mean under the car. You want the vents on top of the car. The idea is to try and eliminate, reduce the amount of air under the car. Air under the car is what causes instability as the high pressure trys to lift the car. Vents just behind the radiator and on the fenders will work. A belly pan also reduces the amount of drag, turbulence and pressure under the car the reducing lift.