Yep, so driver mod aside (I used the launch control at 3000 then at 4000k on both tires for a more controlled experiment ) I switched from the factory 235/50 r18 all season Neuros to the factory 'Foundry rims' with 265/40r20 Summer Pirelli's. I understand that a bigger wheel will slow down your times, but i figured with a wider summer tire i would AT MINIMUM stay the same. These are my 0-60 times with Launch Control:
@3000 RPM
235's All seasons - 5.2 (which I figured with 235s figured that was the reason i was so far off the '4.6' 60 ft the mags are claiming)
265 summers- 5.7 (???? what????)
@ 4000 RPM
235s- 5.3 consistent
265- 5.9 & 6.1 ( my god!) (with a mini burn out to boot)
How in the world?? These tires feel like im on ice! ZERO hook and horrible (and i mean horrible) wheel hop. The 235s wheel hopped but I could slip the clutch and peel out (non launch control) to a 5.1. I tried to manually launch the car with the 265s to no avail. There's no way the 2 inch rim makes THAT much of a difference. ( I took the car to the track with the 235s and ran a 2.2 60ft and a 13.3 @ 110. The 265s want to get sideways in 2nd; something i didnt feel with the 235s. What could be the problem??? Im scared to run at the track with the 265s, I dont want to put it into the wall. Something I thought the 265s would fix. Help
@3000 RPM
235's All seasons - 5.2 (which I figured with 235s figured that was the reason i was so far off the '4.6' 60 ft the mags are claiming)
265 summers- 5.7 (???? what????)
@ 4000 RPM
235s- 5.3 consistent
265- 5.9 & 6.1 ( my god!) (with a mini burn out to boot)
How in the world?? These tires feel like im on ice! ZERO hook and horrible (and i mean horrible) wheel hop. The 235s wheel hopped but I could slip the clutch and peel out (non launch control) to a 5.1. I tried to manually launch the car with the 265s to no avail. There's no way the 2 inch rim makes THAT much of a difference. ( I took the car to the track with the 235s and ran a 2.2 60ft and a 13.3 @ 110. The 265s want to get sideways in 2nd; something i didnt feel with the 235s. What could be the problem??? Im scared to run at the track with the 265s, I dont want to put it into the wall. Something I thought the 265s would fix. Help