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I posted in Tech Talk, but received mixed answers that were more car specific than I thought the answers would be. So I'm posting the same question in the BMW section. For those of you that don't...

I need to change my stock diff in an 89 325is to a 4.10 diff. I see them for sale from BMP for a pretty steep price. Can I visit my local junk yard and use one from a crashed M3? Would that be...

I've been building an E30 ('89 325is) race car for the past year. I started with a stock car and in the first year added the cage and other safety equipment. Over the winter, a new suspension was...

Is there a resource (book, website) that would help with suspension adjustments or do I resort to trial and error? For my '89 325is, I am setting the camber at 1.8 and setting the shocks mid-way...

My suspension is done. I got t drive the car around the neighborhood today. The car is off to the shop for an alignment tomorrow and to put the new race tires on the rims. My region has a "once a...

All is well. The parts are cut and ready to be welded. zracer22 thanks for your help.

So your spring perch is at the same location as the stock perch, but you've taken an inch out of the strut housing above the spring perch. Your ride height is lowered only by the shorter springs.
...

After further analysis, I think the correct thing is to cut the housing. The strut nut is self tapping. That, I assume, is why zracer22 said to have straight cuts. Without a straight cut, I won't...

I'm looking at the directions from Ground Control to install the lower spring seat on the strut housing, but I'm not clear on something. The picture shows the seat being welded 3 inches from the...

Can someone recommend where to get a proportioning valve, a vendor and a model? Thanks.

Sorry for the lack of reply on my part, I've been in California for awhile.

I had no trouble getting the old suspension out. So far so good.

The rear is done and went together easily.
...

Anyone have suggestons on enhancing the stock brake ducting on an 89 325is? Turner and BMP both sell duct kits. Does anyone have experience in installing these. To get them on, do I need to pull...

I'm installing a race suspension in an '89 325is. I've completed the rear and I am now tackling the front. While I've got it in pieces, I'm also replacing the control arms. Anyone have any...

Marshall,

I've misplaced your e-mail address. Can you drop me a line to [email protected].

Are you racing with WDC at Summit PT in April?

Thanks.

Marshall (or anyone else),

Have you installed this fuel T?

I can attest to the fact that building a car is very expensive and time consuming. Although its big fun.

If your plan is to have racing as your hobby rather than car building and tuning, then...

To disconnect the ABS for an SCCA race school, I pulled the sensor connection plug on the left sid of the eengine compartment and the ABS shut down. The brakes worked. I only locked them badly once...

The www.stackinc.com address went to a BT website selling web hosting services. The DA you describe sounds awesome,but proably outside this year's racing budget.

What is a Stack DA?

--Ray

The 2001 GCR says "coil over struts and shock absorbers, where a threaded sleeve is permanently attached to a housing, are prohitbited unless fitted as standard equipment". Can someone tell me how...

Questions for James Clay (and anyone else that would like to add sage advice):

No rear sway bar? Does anyone else run without one? How does no bar help in corners? Is the lack of a bar...

Any suggestion on Ground Control parts? I went to their site, no package. A previous poster seems to imply that you need to know what you want before you buy Ground Control parts. I'm not sure. ...

I ran my stock suspension on my E30 last week at Summit Point. A wild (and slow) ride to say the least.

I'm shopping for a full upgrade to a race suspension. Turner sells a "J-Stock" kit for...