tbal

Im trying to get these 275/45/18 DR's to fit, but unless I drive the car in 4x4 mode they will not work.

Question is, if my car sits in 4x4 mode or higher, will it effect performance? What if the car is higher in the rear than the front?

Thanks guys

iAMGod

I think your ride height will have about as much effect on your cars performance as the Coriolis effect of the earth.

Damn I wish I could join you guys tomorrow...

GregMB

Angelo (scratch) had all sorts of weird issues with the ESP when using large diameter rear tires. It seems that the differential in diameter between front and rear caused the traction control system to go haywire.... Might be worth making a couple of high speed runs just to see if the yellow triangle goes nuts or not.

-G

skratch77

If your car is like mine the traction light will blink down the whole track and the car will sway back and forth from the car using the brakes to try and correct the wheel speed.

can you nail second gear all the way to red line without the tc coming on?

AKnight55

Your changing the gearing of the car.. Your mph is going to go way down with a tire that tall.. possibly even by about 4-5 mph.. I noticed a difference in my trap speed going from a 275/35/18 to 265/40/18 drag radials.. I would look for some other tires

Forrest Gump 9

Have you tried them on your car yet? If the front tires and rear tires are more than one inch different in diameter your car will freak out. Your ESP will be on, and worse case your tranny will lock in second gear.

And yes, with our car top out third gear right around 130mph. If anything, you want shorter rear tires to maximize the hp curve.

skratch77

mine also threw a wrong gear ration code and went into limp mode,Andrew was at the track that day and the car was fighting me down the whole track applying the brakes at 100 mph,it was not fun and I thought I was going to crash the thing.

after talking to kleemann about it they told me I have less than 2% before the ecu freaks out and my car is wicked sensitive about it,so bad that I even took my 275/35/18s off and swapped them for stock 265/35/18s.

tbal

Thanks guys! I will run just street tires tomm I guess,
And find proper drag radials....

Scratch in 2nd I can't pin it the traction light does come on...

tbal

Thanks bro! thank you Greg!

I also have set of Hoosier r6s layin around. Any good for the strip?

GregMB

Angelo,

Did you ever try making a 1/4 mile pass in dyno mode or is the car too much of a handful that way?

I was just curious if completely disabling ESP could be a possible workaround for the tire diameter issue.


-G

tbal

I'm using 275/35/18s right now and no issues..

AKnight55

Good point, but I would be scared to drive that car down the strip with no computer assisting it

AWOL

When i go to the track i raise just the rear. No harm done and was cutting 1.70's on DR's. Could have done better with more preload but i was a little biitch

skratch77

Ill be taking it to the track soon and in dyno mode I cant get any decent 60ft because it spins to easily.

Should be fun as Im installing a bigger tb and doing a few more cooling mods.My 160 degree thermo stat came in today and waiting for a few more goodies

tbal

You crazy

AKnight55

What size tb did you go with?

skratch77

I have a few 80 mm ones coming.

Ill port the hell out of one and use the other for daily driving

tbal

Hook one up brah

chiromikey

wow, you got it already!?!

tbal,

when it comes to drag racing, i always launch in comfort mode and raised suspension. but keep in mind that at 74mph your car will take itself out of raised mode so if the tires don't fit under normal suspension settings you WILL have problems by half track regardless of whether the computer decides to intervene or not.

skratch77

yeah the t=stat came in today,gotta love the post office