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Clutch slipping - suggestions?
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02-10-2019, 11:28 AM | #1 |
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Clutch slipping - suggestions?
Hi,
Since I had a custom tune the original stock clutch finally gave up so I fitted a 335is USA clutch to my 2007 UK 335i and everything has been running great. I have had the car on the rollers 406bhp and 650nm torque and my latest re tune feels a little more torquey. On a spirited run today I noticed the clutch slipping on higher revs 5k+ 3rd/4th on WOT and full boost up to 21psi. When I stopped at my designation I could smell the usual clutch burning smell. So... I need to look for a heavy duty replacement that can handle with spare capacity over 650nm torque. Can I have some suggestions on ones to look at. I'd need the cluck kit and replacement flywheel. Thanks. |
02-10-2019, 11:31 AM | #2 | |
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02-10-2019, 03:02 PM | #3 |
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I think I'd look to have more tolerance in torque for any future changes I may make so the spec 3+ kit looks like the best option for me.
I'd like to keep using a DMF as opposed to a SMF. Just looking at costs I can get one either delivered to UK or from within the UK. I believe the factory OEM DMF is a branded LUK part around £420. |
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02-10-2019, 04:26 PM | #4 |
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Go with what Jeff suggested. I am running 530 + whp with the same setup. If you are going to go high power, thus needing a Spec 3+ you will not be able to use the DMFW. The big power guys (600 +) fought with timing issues causing misses years ago. It was found that the DMFW was the cause. The rule of thumb is < 500 hp DMFW ok. > 500 SMFW is a must. For most street applications the Spec 2 + is the best choice.
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02-11-2019, 11:40 AM | #5 |
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Ozzie and Jeff are right, you'll want a SMFW if you're chasing power.
FWIW, I'm running a 335is/550i w/ DMFW over 600wtq but I know it's a ticking time bomb. My plan for when it starts to go is mfactory steel smfw and either (a) twin-disc or (b) spec 3+
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02-11-2019, 12:48 PM | #6 |
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The 335is clutch is a great value but ultimately limited in capacity. I wouldn't bother with 2+, I'd go with the 3+ and a SMFW, or if you're going to get real serious one of the twin disk options.
Chris |
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02-11-2019, 02:15 PM | #7 |
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Before anything else do the cdv delete ASAP! It may not fix all of your problems but it will help for now.
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2009 118i Monaco Blue "Maximillion"
2009 335i Saphire Black M Sport "Leopold" Cobb stage 2 aggressive tune, Mishimoto FMIC, Cobb charge pipe, Cobb catted down pipes, Forge diverter valves, BMS inlets and DCI, Cyba scoops and M Individual Audio retrofit and M3 gauge cluster retrofit. 2011 328i Titan Silver M Sport "Franzel" <--Wife's car |
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tisdrew97.50 |
02-11-2019, 03:56 PM | #8 | ||
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I always encourage folks to use the clutch kit based on their actual power output and goals. 3+ is a great clutch but it's made for applications that 2+ cannot hold. The 2+ has better drivability and life expectancy which is why we encourage it. Quote:
Only a matter of time for sure. Let us know when you're ready |
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02-12-2019, 01:19 PM | #9 |
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Thanks for the comments guys appreciate it.
I think the spec 2+ will work for me and the power outputs I want for this car. @ Jeff - would you ship a spec 2+ to me in the UK? |
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02-12-2019, 02:05 PM | #10 |
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02-12-2019, 02:31 PM | #11 |
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Good, at least you know that isn’t adding to the issues.
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2009 118i Monaco Blue "Maximillion"
2009 335i Saphire Black M Sport "Leopold" Cobb stage 2 aggressive tune, Mishimoto FMIC, Cobb charge pipe, Cobb catted down pipes, Forge diverter valves, BMS inlets and DCI, Cyba scoops and M Individual Audio retrofit and M3 gauge cluster retrofit. 2011 328i Titan Silver M Sport "Franzel" <--Wife's car |
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02-12-2019, 02:56 PM | #12 |
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Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com
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02-12-2019, 05:58 PM | #13 |
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@jeff PM sent. Thanks.
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Jeff@TopGearSolutions3440.50 |
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335i, clutch |
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