Norcal BMWCCA AutoX photos

[CrazyB]

anything lower that 3.73 is kind of hard to find in lsd

[race2win]

What suspension you running?
I had same issue with gearing, I run 3.73 lsd rear with same tires and wheels and was bouncing of the rev limiter in some spots.

I really need to get some camber plates as the front would wash out on some of the more high speed turns.

My suspension is pretty simple...Vogtland springs (I think they are the proggressive type, I don't think they are the stiff ones) & Billy sports, with I believe ST sway bars front & rear. Most of it was on the car before I got it, it's a decent street set up with a pretty good ride, but definitely not the hot autocross set-up. I may put in a set of Konis & H&R race springs to keep it in class A for the time being, but if I decide to develope the car for SCCA STX next season then I'll probably go with a TC Kline coil-over set-up with double-adjustable Konis, camber plates, etc. with very stiff custom spring rates.

Run a different diff or is that against STX rules? (sorry I am in SM)

In the SCCA street touring category, the gear ratios must be stock original. In STX you are allowed any limited slip though, just as long as the ratio is original. So in the case of the 5-speed 87-91 325i/is you can run any limited slip in a stock case with a 3.73 ratio. I have a stock S3.73 diff ready to bolt in from an 89 325is, just haven't found time to do it yet.

So, the only legal way in STX to raise the max MPH in 2nd gear in an E30 is by tire size and/or a raised rev limit.

[CrazyB]

Yeah i was playing with idea of running the 245/50/15 after rs3 is done but not sure how a 245 will seat on a 15x8 wheel

[Jean]

My suspension is pretty simple...Vogtland springs (I think they are the proggressive type, I don't think they are the stiff ones) & Billy sports, with I believe ST sway bars front & rear. Most of it was on the car before I got it, it's a decent street set up with a pretty good ride, but definitely not the hot autocross set-up. I may put in a set of Konis & H&R race springs to keep it in class A for the time being, but if I decide to develope the car for SCCA STX next season then I'll probably go with a TC Kline coil-over set-up with double-adjustable Konis, camber plates, etc. with very stiff custom spring rates.



In the SCCA street touring category, the gear ratios must be stock original. In STX you are allowed any limited slip though, just as long as the ratio is original. So in the case of the 5-speed 87-91 325i/is you can run any limited slip in a stock case with a 3.73 ratio. I have a stock S3.73 diff ready to bolt in from an 89 325is, just haven't found time to do it yet.

So, the only legal way in STX to raise the max MPH in 2nd gear in an E30 is by tire size and/or a raised rev limit.

This was hard to read, so you mean the diff ratio has to be the same as it came on the car OR can it be changed to another STOCK ratio from another E30? Or are you saying ratio has to stay the same but the lock % can be changed?

[CrazyB]

Not sure in St but in Sp where I run it can be any of the stock diffs as i can update backdate parts on my car
I think in St to update backdate you have to do all of the options form the update or backdate car not just one component

[Bimmerman325i]

Great pics, I'll have to bring my brother and his E46 325iT to one of your events once I get out there....I'll just have my scoob for a while.

CrazyB, what 245/50/15 tire are you looking at? I didn't know those were even made.

[mohamadr89]

where is bmw cca auto x located at? and is it like thunder hill where you drift around the track?

[CrazyB]

Hoosier is available in 245/50/15 But really I want to find some 15x8.5 or 9 and run 255/40/17 as the rs3 are cheap in that size.

[CrazyB]

where is bmw cca auto x located at? and is it like thunder hill where you drift around the track?

Most events run at marina airport in Monterrey ca But this is at least for the Golden gate chapter

[race2win]

This was hard to read, so you mean the diff ratio has to be the same as it came on the car OR can it be changed to another STOCK ratio from another E30? Or are you saying ratio has to stay the same but the lock % can be changed?

In street touring, the diff ratio must be stock/original, but any limited slip may be used. This allows you to upgrade to an aftermarket limited slip unit or build the factory limited slip unit to have more or less lockup.

No, you can't use any E30 ratio, only the one that came stock on that particular model/package. So, in the case of my car, I have to run a 3.73 ratio diff since that is what came stock on all 89 325i 2D models with a 5-speed transmission. If say I wanted to use the 4.10 diff from the automatic E30s, it wouldn't be legal unless I converted the car to an automatic ;-)

I know it sounds confusing, but it is written this way to prevent mixing & matching of parts from different models to create frankenstien cars that cost a lot to build & develop.

In street prepared, you are able to mix & match, they call it "update-backdate". Street touring had this rule originally, but they changed it because a couple people built 88 Civic DX hatchbacks with 89 Si drivetrains that were so much faster than the regular Civic Si's that it would have forced EVERYONE to build the same car to be competitive.

[freeride53]

So...
How did the dude in the silver e46 xi do?
He's a good friend and classmate of mine.

[CrazyB]

Not sure here are the results.

http://xmdforum.com/brian/2011-AX2-ProvisionalResults.htm

[Jean]

And the fastest car there was - STI.

[CrazyB]

The sti was real fast sitting on wide sticky r compound and with many other mods. this thing was bad.

[Beemer Boy]

I can't wait to get back out there, I'm out out right now with some knee surgery that I just had.... but that didn't keep me from running mine around the block today haha as soon as I can drive again i'll be out there in that B class!!