speed_demon24

iTrader: (6)

Right now I'm running 315 555r's in the back and just 275 street tires up front. I'm thinking about keeping the 315's out back and running 275 555RII's up front for the track. Would this be a good combo, or will it make the car way too tight? My other option would be just run 275's on all 4 corners.

JimMueller

iTrader: (9)

Stickier tire compound and/or larger tire contact patch both in the rear should make the car push/understeer while cornering. It can be reduced by the proper selection of aftermarket suspension parts, but I prefer to use the same compound and size on all four wheels.

OldeSkool

i say keep the 315's for more traction under accel. get a larger rear sway bar to make up for the difference

WILWAXU

iTrader: (6)

I've ran that combo for years without issues.

Nitto 555 in the front & Nitto 555R (DR) in the rear.

HAMRHEAD

iTrader: (8)

There won't be any issues. It's been done many times

mitchntx

iTrader: (14)

Picking up a corner exit push is a real issue, IMHO.

You can wait a little longer before rolling on the gas or you can increase effective rear spring rate bias or you can run the same size tires all the way around.

Some how, you will need to overcome all the increased traction you have in the rear.

speed_demon24

iTrader: (6)

It looks like I'll just have to save up for 4 new tires then. I'm going to be running strano springs/swaybars, koni s/a's, and a UMI panhard bar which I'm still waiting on.

JimMueller

iTrader: (9)

Say, if you're interested in autocross also, we're having our semi-annual 'high-speed' autocross at the Gainesville Raceway test track on 4/7/07. Lake county might be too far for a monthly event (for me it would from Ocala). PM me if interested.

speed_demon24

iTrader: (6)

I noticed that track at gainesville, is it really a roadcoarse or more of an autocross track? I know they have open test/tune days on it for $50 all day, it doesn't seem like that bad of a deal.

JimMueller

iTrader: (9)

It's more of a short roadcourse and depending upon course configuration lap is only 1-2 minutes long. You need to stay on course during the rainy season or you'll end up in the deep end, though.

http://www.nhra.com/2005/images/Gain...oadcourse1.jpg