largest front wheel tire combo (265/35 YR18 ?)
11-26-2005, 08:43 PM
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largest front wheel tire combo (265/35 YR18 ?)
I would like to go with 265/35 YR18 Michelin Pilot Sport Cup on 9" up to 10" rims on the front of my 89 930 with coilovers. I am having Kinesis widen the rims on the inside. The overall dia of the 265 is 25.2" and section width 10.9" and I am running 25.1" dia with a section width 9.2"on my 225's now. I rolled the inside lip of my front fender and do not rub my 225/40 18 now but would like to know if it is asking to much for 265/35 YR18 to fit up front.
11-26-2005, 10:25 PM
#3
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Originally Posted by Dknebes
I would like to go with 265/35 YR18 Michelin Pilot Sport Cup on 9" up to 10" rims on the front of my 89 930 with coilovers. I am having Kinesis widen the rims on the inside. The overall dia of the 265 is 25.2" and section width 10.9" and I am running 25.1" dia with a section width 9.2"on my 225's now. I rolled the inside lip of my front fender and do not rub my 225/40 18 now but would like to know if it is asking to much for 265/35 YR18 to fit up front.
11-27-2005, 01:14 AM
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Thanks for the reply. Well I make 755rwhp which is a bear on the track and it is not absurdly stiff and I know for sure I am not the 2nd coming of Shumi. I am not looking for the fronts to stick on the street but explain to me why they won’t get hot on the track. My other setup with 225's in the front and 295's in the rear got hot if I lowered the tire presure. . The main reason for this change was to get more tire in the rear (315/30 18) to help control wheel spin. If this was strictly a track car I would never have gone with this much hp, but now I need additional traction for the street.
11-27-2005, 09:02 AM
#5
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David,
I have found that with certain tires (MPSC) and a street alignment, I could not push the car hard enough to heat up the front tires beyond about 160 degrees F while on the track. These tires really like to be between 180-220F for them to work properly. Larger tires will just increase the issue because there is more surface area to heat up. If your car is capable of an agressive track oriented alignment (-3 degrees camber), then it would make sense for the wider rubber and your car being 3000lbs or so would need the extra rubber and would be able to heat them up.
I have found that about 550hp is a very nice track setup for a street suspensioned 930. Beyond that, the chassis cannot handle the extra power and the car becomes harder to drive. It needs a cage to keep the chassis from flexing, stiffer suspension to keep the tires from hitting the qtr panels, and a more agressive alignment to keep the tires wearing properly.
I have found that with certain tires (MPSC) and a street alignment, I could not push the car hard enough to heat up the front tires beyond about 160 degrees F while on the track. These tires really like to be between 180-220F for them to work properly. Larger tires will just increase the issue because there is more surface area to heat up. If your car is capable of an agressive track oriented alignment (-3 degrees camber), then it would make sense for the wider rubber and your car being 3000lbs or so would need the extra rubber and would be able to heat them up.
I have found that about 550hp is a very nice track setup for a street suspensioned 930. Beyond that, the chassis cannot handle the extra power and the car becomes harder to drive. It needs a cage to keep the chassis from flexing, stiffer suspension to keep the tires from hitting the qtr panels, and a more agressive alignment to keep the tires wearing properly.