The foam increased the stiffness of the cars chassis. This is independent of the suspension stiffness. Presumably, since the chassis isn't twisting and wiggling, the suspension works differently now resulting in understeer.

I removed the ST front swaybar and the balance is back the way is was, plus traction and ride are better.

I hope that makes better sense.

MK

 

so what was wrong with riding with a stiffer chassis.. and Front ST sway bar.. did you leave the rear sway bar? or did you replace that with stock as well?

 

I put the stock front swaybar back on, using the urethane bushings. The rear still has the ST bar.

In my case, the ST front swaybar would unload the inside tire too much while cornering, and cause extra wheelspin. It also increased ride harshness quite a bit over single wheel bumps and potholes.

Unfortunately the car wanders much more now that the ST bar is off.

In my opinion a stiff chassis (frame of the car) is good. This has nothing to do with the stiffnes (or frequency) of the suspension (the part the connects the wheels to the chassis). I personally like a softer suspension with lots of travel (and damping). Which means I need to make some coil-overs.

MK

 

Mmmm glad I have LSD.
with the subframes, ST sways, FSTB, Tokicos, Eibachs.. the car handles pretty much neutral, except when I'm trying to get ont he gas out of the corners.. BOTH front wheels spin in my case, and I just end up going straight..
I'm sure a lot of that can be cured by simply changing my driving style though (easier on the gas coming out of corners). also possibly changing to the SE sway bar up front might do some good, as the car is VERY flat on the corners. I'll play with that once the turbo is on and see where that goes.


Also Jeff didn't kill his engine.. engine's fine. the turbo he used was an original T3 from a Z31 (same setup I'll be running at first), and the turbo itself lost the oil seals in it and became a James Bond type smokescreen.. so he pulled it and had it rebuilt. no big deal there. 13+ year old turbos are allowed to blow a ring someday.

 

The maximas over there are rear wheel drive. That explains the 4th gen with a stock !!turbo!! VQ30DE being put in there.

 

yeah the cimas. .

 

is the compression exactly 10.0:1 ?

 

uhhh, #1. if you had used the search fuction, you'd know that it's 10:1 already.

#2. 10.0:1 is close enough for whatever you're doing. incredibly specific numbers won't change your requirements much.. it's pretty close to that, not much farther off than .1.. and it varies with each engine's condition.... some have higher compression because the cylinders are full of carbon deposits..

 

thanks, i knew it was 10:1 just making sure it was 10.0:1

 

[stupid voice] duhhhhhhhhhhhh okay George.. whatever you say George. [/stupid voice]
you just answered your own question.

 

 

how much hp are you pulling with that high of boost? Thanks.

 

read his other posts. he's said it before.