Hey guys, so... as the title goes, I'm kinda looking for Semi Slick 19" tires.
Story is as follows. My car is an e46 M3, supercharged, running 3psi low boost for now as the car literally wants to kill me. I have water meth and 6psi boost waiting, but before I commit to more power, I need to sort out my traction issues.
The car also has a 3:91 diff gear set. For those that do not know, the stock gear set is 3:64, so this gear set I have is a shorter set. This allows for more acceleration and low down torque. It's often referred to as the poor mans supercharger.
Now I am not sure whether the problem is because the diff and supercharger combo are too much, or that I need tires that can grip more, or that my recently redone suspension bushes are not that great or that my suspension/subframe carrier was installed wrong. All I know is, the car is wanting to go sideways any chance it has.
I am running Michellin Pilot Super Sport 2's at the rear. They have tonnes of tread left, (or I'm just doff and they're finished, but I doubt it). They are 275/35/19. I have been told they are the wrong profile and that I need to run 275/30/19 at the rear. I used to run Hankook Evo 19's at the rear in the 275/30/19 and they stuck like glue. That being said, ever since I first installed these Michellin's last year August, I've felt that they were a bit wonky and gave me weird sideways action. Could very well be the tires.
Once tires warm up, I have better grip, but she's still pretty wild.
First gear up to third gear are just stupid sideways action. I'll launch and spin tires all the way into third gear. By the time I've hit 140kph I'm still spinning. Now as much as this is awesome for guys who love to make smoke and leave 11's on the raod, it's bloody annoying for me, someone who wants grip. I want the old feel of my M3 where I would engage a lower gear, accelerate and the car would shoot forward. Now, I engage a lower gear, accelerate and suddenly I'm sideways and counter steering.
Don't get me wrong. The car is fast. Scary fast. and before you all tell me to get rid of the 3:91 diff, there are countless e46 M3's overseas that are running 9psi boost with 3:91 diff and do not have the issue I am having. I've spoken with many of these owners, all of whom either suspect diff was installed incorrectly, tires are the issue, or subframe isn't mounted right. (reason I think the latter may be true is that it feels as if the rear wheels twist under hard acceleration.) The DSC light blinks like a Christmas tree lights on LSD.
I have sourced a replacement diff with stock 3.64 gears. So I am going to test that soon, but I noticed even before the supercharger how sideways this car was. And I'm sorry, but no one running a 3:91 diff in their NA e46 M3's report the car losing use of 1st and 2nd gear. Often I've heard how potent 2nd gear is and how the car just pulls relentlessly. I, on the other hand, am sitting trying to try keep the car aiming straight. Having to throttle control like mad.
I have bilstein Pss10 coilover suspension and before all this diff and rear bushing work, the car used to stick to the road like it was on rails. Now, not so much. I don't trust the car in corners and have literally lost the nerve to throw her into a fast tight corner for fear of the rear giving up.
The diff was built by boetie budler after the first diff workshop completely messed up the ring and pinion install. I'd trust boetie's knowledge when it comes to rebuilding the diff.
Any advice on a place I can go to to inspect diff, tires, suspension setup, etc to understand why I have no traction. I'm guessing it will need to be a proper race tuning shop, as I've lost faith in most normal suspension and mechie shops.
I'm wanting to try some Semi Slicks to see if this eradicates the problem. So if anyone has any semi's I can try use for a day to see how they work, I'd appreciate it.
Story is as follows. My car is an e46 M3, supercharged, running 3psi low boost for now as the car literally wants to kill me. I have water meth and 6psi boost waiting, but before I commit to more power, I need to sort out my traction issues.
The car also has a 3:91 diff gear set. For those that do not know, the stock gear set is 3:64, so this gear set I have is a shorter set. This allows for more acceleration and low down torque. It's often referred to as the poor mans supercharger.
Now I am not sure whether the problem is because the diff and supercharger combo are too much, or that I need tires that can grip more, or that my recently redone suspension bushes are not that great or that my suspension/subframe carrier was installed wrong. All I know is, the car is wanting to go sideways any chance it has.
I am running Michellin Pilot Super Sport 2's at the rear. They have tonnes of tread left, (or I'm just doff and they're finished, but I doubt it). They are 275/35/19. I have been told they are the wrong profile and that I need to run 275/30/19 at the rear. I used to run Hankook Evo 19's at the rear in the 275/30/19 and they stuck like glue. That being said, ever since I first installed these Michellin's last year August, I've felt that they were a bit wonky and gave me weird sideways action. Could very well be the tires.
Once tires warm up, I have better grip, but she's still pretty wild.
First gear up to third gear are just stupid sideways action. I'll launch and spin tires all the way into third gear. By the time I've hit 140kph I'm still spinning. Now as much as this is awesome for guys who love to make smoke and leave 11's on the raod, it's bloody annoying for me, someone who wants grip. I want the old feel of my M3 where I would engage a lower gear, accelerate and the car would shoot forward. Now, I engage a lower gear, accelerate and suddenly I'm sideways and counter steering.
Don't get me wrong. The car is fast. Scary fast. and before you all tell me to get rid of the 3:91 diff, there are countless e46 M3's overseas that are running 9psi boost with 3:91 diff and do not have the issue I am having. I've spoken with many of these owners, all of whom either suspect diff was installed incorrectly, tires are the issue, or subframe isn't mounted right. (reason I think the latter may be true is that it feels as if the rear wheels twist under hard acceleration.) The DSC light blinks like a Christmas tree lights on LSD.
I have sourced a replacement diff with stock 3.64 gears. So I am going to test that soon, but I noticed even before the supercharger how sideways this car was. And I'm sorry, but no one running a 3:91 diff in their NA e46 M3's report the car losing use of 1st and 2nd gear. Often I've heard how potent 2nd gear is and how the car just pulls relentlessly. I, on the other hand, am sitting trying to try keep the car aiming straight. Having to throttle control like mad.
I have bilstein Pss10 coilover suspension and before all this diff and rear bushing work, the car used to stick to the road like it was on rails. Now, not so much. I don't trust the car in corners and have literally lost the nerve to throw her into a fast tight corner for fear of the rear giving up.
The diff was built by boetie budler after the first diff workshop completely messed up the ring and pinion install. I'd trust boetie's knowledge when it comes to rebuilding the diff.
Any advice on a place I can go to to inspect diff, tires, suspension setup, etc to understand why I have no traction. I'm guessing it will need to be a proper race tuning shop, as I've lost faith in most normal suspension and mechie shops.
I'm wanting to try some Semi Slicks to see if this eradicates the problem. So if anyone has any semi's I can try use for a day to see how they work, I'd appreciate it.