348 competition tires HELP

It would be helpful to know your wheel widths.

 

http://www.tirerack.com/tires/tires.jsp?tireMake=Goodyear&tireModel=Eagle+F1+GS-D3&partnum=935YR8F1GSD3



http://www.discount-tires-2go.com/Store_Detail.cfm?ID=184583&InfoID=4853&ShowLarge=True




http://discounttires.com/product_detail.php?c=OTlkODJjMmZlZjdkZjMyMWRlMWIwZjJlNTNlMTZjMWE=&prodID=6706



http://cgi.ebay.com/ebaymotors/New-Toyo-Proxes-T1R-Tire(s)-295%2f35R18-295%2f35-18-2953518_W0QQitemZ350188449762QQcmdZViewItem?rvr_id=&itemid=350188449762



http://www.tirerack.com/tires/tires.jsp?tireMake=Kumho&tireModel=Ecsta+MX&partnum=935YR8EMX

 

FIRST come out with us sunday http://ferrarichat.com/forum/showthread.php?t=263554

On tires don't worry just use the 30's. The 1/2" is not going to be a problem on the rev's. What it will do is change the rear grip and the over/understeer charactor. I used to race a 348 and it is very sensitive aka tuneable with alignment and chassis rake. Lowering rake in these cars I liked because it reduced dive on heavy braking and made the back stick better. Going to a DOT tire and dropping the rear 1/2" will make you feel very planted. I got extra 355C wheels by the way too. If you plan to track this car talk to me I got some counter intuitive tricks that help these cars work. Search through some old threads I talked about homemade delrin bushings, brake ducts, Delta Vee spring/shock revalving and set-ups. You can also shoehore 315's on there if they are hoosiers A6/R6 and using a 10" rim like a 355C wheel. The hoosier has a funny lip on the bead and you can oversize the wheel a bit and not loose support for the sidewall like you might on another brand tire. Personally I on race on properly sized tires for the wheels unless there is lots of data to show its safe and fast to do otherwise. For example we run 315's on 10" wheels on T1 vettes in SCCA with zero issues all because of that hoosier lip. I have run countless tire combos on 348's including mixed brand front and rear slicks which is totally doable but you have to tune the chassis to do that.