|
|
07-25-2020, 12:04 PM | #1 |
Colonel
970
Rep 2,436
Posts |
305 square ....
This topic is a meeting of the minds
So who's done it? Also ...who has done it with MCS suspension? For this to be accomplished, spring perch needs to be raised some. I'm on 6" 2.25 900lb springs. Currently run on 18x10.5 et33 with 20mm spacer upfront on 285 Hoosier slicks. Had a tire blow out at the Glen last session of a 2 day event. Tire got severely hot, expanded and hit the spring perch. 285 square feel great, but I want to step up. Obviously shorter spring will compromise travel...would love some feedback of the .....Minds. Thank you. |
07-25-2020, 12:27 PM | #2 |
Major
1074
Rep 1,025
Posts |
With that heavy of a front spring I doubt you'd have issues with it fully compressing by going shorter. Spring manufacturers should be able to tell you what the block height is of any given spring so you can see just how much travel you may lose.
__________________
Steve::::2012 AW E92::::IG - @sjs0433
|
Appreciate
0
|
07-25-2020, 05:49 PM | #3 |
Colonel
970
Rep 2,436
Posts |
I agree, very good point ! This is what MCS sent to me when I emailed them
|
Appreciate
0
|
07-25-2020, 07:24 PM | #5 |
Colonel
970
Rep 2,436
Posts |
|
Appreciate
0
|
07-25-2020, 07:35 PM | #6 |
Colonel
970
Rep 2,436
Posts |
|
Appreciate
0
|
07-25-2020, 08:13 PM | #7 | |
///M Powered for Life
11500
Rep 10,333
Posts |
Quote:
If there's no such thing as a 4.5 inch spring then i guess you have to lose the helpers. I should have measured today, I swapped the MCS 2WNR for the 3WR on the F80 CS. |
|
Appreciate
0
|
07-25-2020, 09:42 PM | #8 |
Colonel
5356
Rep 2,806
Posts
Drives: '09 E90 M3 - IB
Join Date: Feb 2012
Location: 93 million miles from the Sun
|
If you want 305, go with a 5” spring and ditch the helper springs. That’s what I did. No issues.
|
Appreciate
4
|
07-26-2020, 08:08 PM | #9 |
Lieutenant Colonel
1525
Rep 1,597
Posts |
Only go to a shorter spring if you can do so without comprising shock stroke. It depends on your current spring, but you might be able to get a 5in spring that allows full stroke. If you can't, then stick with your setup. Going to a 1 size bigger tire is not worth it if you need to compromise the performance of your suspension (reducing stroke) to do so.
What's your clearance like to the fender? Since you don't got room to move in, do you got any room to move out? How much camber you running? |
Appreciate
0
|
07-26-2020, 08:33 PM | #10 |
B.E.
444
Rep 761
Posts |
I have mcs and went with a shorter spring with no helper, like dogbone mentioned. I run 305 Pirelli DH with no problems. As you can see in the pic attached, the perch sits above the tire
__________________
Current: 2022 TRX & 2010 GT3RS
Past: 2016 M3 Individual Grigio Telesto Pearl, Sakhir Orange/Black Full Leather w/ CF trim, 6MT, ZCP, CCB, etc... Previous: 2011 E92 M3 Melbourne Red on Black 6MT ZCP. --> now 2010 dedicated track car |
Appreciate
5
|
07-26-2020, 08:35 PM | #11 |
///M Powered for Life
11500
Rep 10,333
Posts |
What do you do about the springs in full droop? Do they clang when they resettle?
|
Appreciate
0
|
07-26-2020, 09:01 PM | #12 | |
B.E.
444
Rep 761
Posts |
Quote:
__________________
Current: 2022 TRX & 2010 GT3RS
Past: 2016 M3 Individual Grigio Telesto Pearl, Sakhir Orange/Black Full Leather w/ CF trim, 6MT, ZCP, CCB, etc... Previous: 2011 E92 M3 Melbourne Red on Black 6MT ZCP. --> now 2010 dedicated track car |
|
Appreciate
1
SYT_Shadow11500.00 |
07-26-2020, 09:19 PM | #13 |
Colonel
970
Rep 2,436
Posts |
Everyone here has such great feedback, guys thank you.
I'm running -3.7 camber upfront so I have room even if I run spacers. On my e36 I ditched the helpers and went shorter spring like 3 years ago..no issues at all...like a member said earlier..just lower the car down slowly when it's jacked up. |
Appreciate
0
|
07-26-2020, 11:33 PM | #14 | |
Major
1132
Rep 1,366
Posts |
Quote:
Also, anyone out there running the KW’s with big tires? I’ve got the shorter eibach spring and recently raised up my ride height but I think I’m cutting it a bit close. Looking to dump the helper spring on mine but not sure there’s enough threads on the shock body to raise the spring perch enough and maintain similar to my current ride height.
__________________
#ladydriven Heavy-spec M3 // KW Clubsports // AA x-pipe // Gintani muffler // Macht-Schnell intake // Gintani tune // OMP Seats // Too Many Apex Wheels // Stoptech ST-60 // Cobalt Friction brake pads |
|
Appreciate
0
|
07-26-2020, 11:37 PM | #15 | |
B.E.
444
Rep 761
Posts |
Quote:
__________________
Current: 2022 TRX & 2010 GT3RS
Past: 2016 M3 Individual Grigio Telesto Pearl, Sakhir Orange/Black Full Leather w/ CF trim, 6MT, ZCP, CCB, etc... Previous: 2011 E92 M3 Melbourne Red on Black 6MT ZCP. --> now 2010 dedicated track car |
|
Appreciate
0
|
07-27-2020, 07:25 AM | #16 |
Major General
2745
Rep 6,734
Posts
Drives: 'E46 M3 Race Car, '23 X7
Join Date: Jan 2009
Location: Wisconsin - Instagram - @slicer_m
|
Pirelli DH 305 runs relatively narrow. It's actually narrower than a 295/30/18 A052. Pics for reference.
__________________
'23 X7
'04 M3 - Fall Line Motorsports Built Race Car - S65 swap, Dry Sump, Bosch Stand-Alone ECU, Drenth Sequential Trans, MCS 3-Way, Flossmann Wide Body, Brembo Motorsports Brakes, Drexler LSD, BBS E88 Etc. INSTAGRAM - @Slicer_M |
07-27-2020, 01:10 PM | #17 |
First Lieutenant
620
Rep 327
Posts |
Great comparison slicer ! Is the 295 AR1 also on an 11" wheel? Looks like it, mine were not quite as stretched on a 10.5"
I'm going to try fitting the 315 AR1s soon. Hopefully they run true to size like the 295 does. 315/30-18 Hoosiers on 18x11 ET25 wheels don't quite fit under stock fenders. No way its going to fit up front, even with camber at -3.7 its still a ways outside the fender. In the rear it might work with a ET30-33 wheel and a lot of camber.
__________________
Chris
|
Appreciate
0
|
07-27-2020, 02:16 PM | #18 | |
///M Powered for Life
11500
Rep 10,333
Posts |
Quote:
|
|
Appreciate
1
nicksm3969.50 |
07-27-2020, 06:58 PM | #19 |
Second Lieutenant
331
Rep 285
Posts |
I'm running kw cs without helper springs
Apex 18 x 10.5 +27, 5mm I feel like would clear but I have 12mm on and have been okay the last 2 events in this crazy heat 295/30 hoosier a7
__________________
NASA Mid Atlantic - TT3 #97
'12 E92 M3 ZCP Sponsored by Andrewtech Automotive |
Appreciate
0
|
07-27-2020, 08:44 PM | #21 | |
Lieutenant Colonel
1525
Rep 1,597
Posts |
Quote:
Debated doing this myself, it's just a question of it turning out and looking half decent. |
|
Appreciate
1
Kelse921131.50 |
07-27-2020, 08:51 PM | #22 |
Lieutenant Colonel
746
Rep 1,848
Posts |
I feel like such a loser with my 245's
|
Appreciate
1
Longboarder3435.00 |
Post Reply |
Bookmarks |
|
|