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The ZHP front bar is actually lighter than stock. I don't know why, but someone here once ascribed it to BMW wisdom.
I went with a M3 bar and felt an immediate and substantial improvement in handling in my ZHP. Never looked back.
I have a stock ZHP bar you can have if you want it.
I may have to consider that! I’ll be PM’ing youQuote:
Originally Posted by Dual
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Does anyone have a CarSoft or a peake SRS reset tool? After installing my E46 M3 seats, I managed to get the SRS light on my dash and PASoft won’t work to turn the light off
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That might be indicative of another problem. I've reset plenty of SRS lights through PA Soft.Quote:
Originally Posted by ZHP_Brandon
how much power can the 6-speed and rear end handle? Are there any upgrades for these parts? I'm assuming an M3 rear-end, but how about the tranny?
Vibrations: okay, so my steering wheel is shaking like crazy. The severity is intermittent, but when it’s bad, it’s REALLY bad. Tramlining seems a lot worse lately, but the tires look to have plenty of meat left. It‘s really only bad above ~60mph. It gets terrible under acceleration or going uphill, gets better as I coast on flat surfaces, but gets terrible again if I’m coasting/under load on a downhill surface.
I don’t think it’s anything on the back end, since it’s MUCH more noticeable in the steering wheel than in the seats. Because it’s worse under load, I’m not thinking it’s a balance problem, but I’m leaning towards driveshaft guibo and/or engine mounts? Thoughts? I have a steering guibo ready to go in as well.
Replaced items include shocks, springs, end links, front control arms (FCABs are fairly new), tie rods, tranny mounts, and it was aligned last week (but still pulling right?)
Are you running a square setup? If so, move the front tires to the back and see what happens...
One thing I've learned with these cars over the years is that they are really finicky when it comes to tires...
It’s staggered, but I switched front left and right tires before the drive back from Ohio and it still pulls right. I don’t think I have a dragging brake, since the dust accumulation is even on both sides, and I can’t hear anything. Bad wheel bearing, perhaps?Quote:
Originally Posted by Sockethead
You'd hear a bad wheel bearing before it affected handing that bad... I wouldn't rule out a frozen caliper but there are so many things that can cause a vibration/handing issues
if it's vibrating under acceleration, then it's either in the drivetrain (engine/trans mounts or driveshaft), or the rear suspension. rear suspension issues on these cars can indeed manifest themselves as vibrations in the steering wheel...
since you mention the tramlining is increasingly worse, i would look at suspension over drivetrain mounts. did you replace the rear outer control arm bushings yet? if not, definitely a good idea, and go with the upper unit in the lower location too.