[thormessiah]

Very curious since I’ve heard the rear is very tight even with the fenders rolled. Please specify if it is a 235 or 240i

[RoundelM3]

By way of reference, I'm just over 500 WHP in my tuned M3, with 275 rear tires and can break them free at will, at up to 60 mph. Next time tires are due for replacement, I'm going with 295s. Don't think those will fit a 235/240, though.

[Dylan86]

Originally Posted by RoundelM3

By way of reference, I'm just over 500 WHP in my tuned M3, with 275 rear tires and can break them free at will, at up to 60 mph. Next time tires are due for replacement, I'm going with 295s. Don't think those will fit a 235/240, though.

What tire are you using, though? Tire choice is more important than width in most cases. Cold grip (street) tires you're best with Michelin PS4S's or Cup2's. If still using PSS's, they perform quite a bit worse than they're newest replacement..

For track tires (heat cycle REQ'd)/ R comps, they will spin a lot more until they're at operating temps.

[Throttlesteer14]

Don't forget RE-71Rs, but they're somewhere in the middle. They do come up to temp reasonable quick.

[Dylan86]

Originally Posted by Throttlesteer14

Don't forget RE-71Rs, but they're somewhere in the middle. They do come up to temp reasonable quick.

For straight line (big power) grip on street I wouldn't recommend these. I run them, but as a road track tire. I can spin the 265 RE's cold 1-3rd gear w/ LSD. With cold PS4S's in 245 I could barely spin 1st! Big difference. The RE71R shines very well on track or when warmed up properly but most street drives won't get enough heat into them to warrant using them for "more grip" on acceleration/street driving. If drag racing a lot then you might as well get drag radials, imo..

[Throttlesteer14]

Originally Posted by Dylan86

For straight line (big power) grip on street I wouldn't recommend these. I run them, but as a road track tire. I can spin the 265 RE's cold 1-3rd gear w/ LSD. With cold PS4S's in 245 I could barely spin 1st! Big difference. The RE71R shines very well on track or when warmed up properly but most street drives won't get enough heat into them to warrant using them for "more grip" on acceleration/street driving. If drag racing a lot then you might as well get drag radials, imo..

True, I wasn't sure the application was stoplight driving. I can't imagine too many folks are running R compounds or cheater tires on the street. Pretty expensive investment for the life you get out of them.

[Joe240]

I was running PS4S 235/265 with a m240ix with a JB4 map 5 (no meth), CAI and sport DP so was only at 380ish whp, but still would spin a bit through 1st

[Dylan86]

Originally Posted by Throttlesteer14

True, I wasn't sure the application was stoplight driving. I can't imagine too many folks are running R compounds or cheater tires on the street. Pretty expensive investment for the life you get out of them.

Yea for sure.. I do see a LOT of people running RE71R's and R888's on the street. I think it makes them feel better using an R comp tire ? Either way you're 100% right, it's a waste of money unless you're mostly driving to/from the track and want one tire that does it all with some decent livability on the street side. Don't get me wrong, they're great even on street (for me) but I expect the oversteer at colder temps and they are still very manageable when spinning, like how the PSS's felt in the past.

[RoundelM3]

Originally Posted by Dylan86

What tire are you using, though? Tire choice is more important than width in most cases. Cold grip (street) tires you're best with Michelin PS4S's or Cup2's. If still using PSS's, they perform quite a bit worse than they're newest replacement..

For track tires (heat cycle REQ'd)/ R comps, they will spin a lot more until they're at operating temps.

I have Continental Extreme Contact Sport non-runflats on both cars - longer tread life, good ride, and more than adequate grip. Not as extreme performance or expensive as the more track-focused types, but they work for my kind of driving (no track days). Wouldn't matter which compound I ran on the M3 - it needs a larger contact patch from a wider tire.

[cristo]

The Conti ECS are pretty darn good.
A bit better than the Conti DW and not
that far behind the Mich PSS4. I’ve had
all 3 on MINIs and the PSS4 on our M240i.

[Maynard]

You might want to check out the Bridgestone s007 - grippier, but the same tread pattern for good wet traction; not as good as the Conti's in heavy rain, but close. I moved up to these last year from Conti ECs and have been very happy with them, even up in the mountains at mid-30's temps.

[B58togo]

Around 475-480 WHP and a bit more torque, running MPS4S 265/35-18 and I can break them loose at 55 mph if it’s under 55 degrees. Once temps warm up into the 70’s, they’re decent, but 1st and 2nd gear are still dicey. The LSD has helped immensely.

[BimBimM2]

Originally Posted by B58togo

Around 475-480 WHP and a bit more torque, running MPS4S 265/35-18 and I can break them loose at 55 mph if it’s under 55 degrees. Once temps warm up into the 70’s, they’re decent, but 1st and 2nd gear are still dicey. The LSD has helped immensely.

I spent a good ten minutes going through your post history, and couldn't find the exact answer to what mods you are running. Can you kindly share what mods you have? My target is same as yours.

I have an XDrive convertible so considerably heavier than your coupe, however can you share your 0-60 and/or best quarter mile timings as well?

As you can tell I am very curious about your car!

Thank you (and sorry OP for asking this in your forum!)

[B58togo]

Running Bootmod3 Stage 2+ (E30 map for upgraded HPFP), Dorch Stage 1 HPFP, ER catless DP, BMS intake, Remus axle back and xHP Stage 3 transmission flash. Last fall I went to the track and ran 11.8-11.9 @ 118-119 mph. That was on the Stage 2 map and stock pump, so more like 435 WHP. I have to charge up my Dragy, but as it stands, I have no doubts the car will now run 11.50s @ 121-122. Protuning Freaks dynos are showing 475-480 with this new map, up from 435-440 on the stock pump. I am going to purchase an F80 Paul tune shortly and see how much more he can squeeze out on E40. MHD actually got 522 WHP on E30, but rumor has it that was a kill map, right on the ragged edge. Still, breaking 500 on the stock turbo is impressive.

[c-m]

I’m currently 440whp on 93. M235i F23. Running MPS4S 245/35/18 in the rear. I spin to 3rd. Going full E85 next month which means I’ll be over 500whp. Getting a set of R888Rs for the rear. I’ve heard great things about them. Friend runs them on his 480whp A90 Supra and he hooks constantly.

[thormessiah]

Originally Posted by B58togo

Running Bootmod3 Stage 2+ (E30 map for upgraded HPFP), Dorch Stage 1 HPFP, ER catless DP, BMS intake, Remus axle back and xHP Stage 3 transmission flash. Last fall I went to the track and ran 11.8-11.9 @ 118-119 mph. That was on the Stage 2 map and stock pump, so more like 435 WHP. I have to charge up my Dragy, but as it stands, I have no doubts the car will now run 11.50s @ 121-122. Protuning Freaks dynos are showing 475-480 with this new map, up from 435-440 on the stock pump. I am going to purchase an F80 Paul tune shortly and see how much more he can squeeze out on E40. MHD actually got 522 WHP on E30, but rumor has it that was a kill map, right on the ragged edge. Still, breaking 500 on the stock turbo is impressive.

Do you think going X drive would be beneficial if I’m planning on going 500whp for traction?

[B58togo]

X-Drive is always going to be 2-3 tenths quicker, mod for mod and it’ll put the power down more effectively. I personally don’t care for it. Not worth the extra weight or complexity and less fun overall. The launches are brutal though.

[dradernh]

Originally Posted by c-m

Getting a set of R888Rs for the rear. I’ve heard great things about them.

You're probably already aware, but beware in the wet, esp. standing water.

[XutvJet]

Originally Posted by c-m

I’m currently 440whp on 93. M235i F23. Running MPS4S 245/35/18 in the rear. I spin to 3rd. Going full E85 next month which means I’ll be over 500whp. Getting a set of R888Rs for the rear. I’ve heard great things about them. Friend runs them on his 480whp A90 Supra and he hooks constantly.

Do you have an LSD?

I use to think my 6MT had major traction problems in 1st and 2nd. Turned out the lack of an LSD the issue. The difference was way more dramatic than I would have ever thought.

[dradernh]

Originally Posted by XutvJet

Do you have an LSD?

Apparently not: https://www.2addicts.com/forums/show...4&postcount=19.

I'd suggest that an LSD might well be considered Mod No. 1 on a street car.

[c-m]

That’s my next purchase. I need one badly. I’m aware of the R888Rs and water. That’s why I’m going to get a spare set of rear wheels to use them just for track stuff.

[B58togo]

LSD is a must have at these power levels. I’m putting down 480 WHP more effectively with the LSD, than I was putting down 380 WHP (JB4 only) without it. Granted I’m now on 265s vs 245s, but the LSD is responsible for most of it.