M20B29 w/ Triple Webers into my '71 2002

[SkiFree]

Igor, congrats on the E30 win at Socalvintage. Thanks for passing this on to Max.

deutschman - bummed you couldn't come down. Hope all is well.

Jonathan - as if your car isn't insane enough already... haha. Sending you a couple more pictures you might like.

Short Term to-do "write-up" list.
-Hidden stereo system
-Getrag E21 323 4speed tranny/combine with Getrag 245 to create skinny M20 compatible 5-speed.

[deutschman]

Im having a blast at boat building school right now. Ill be back in the Bay Area next year around September, and will be looking for another 2002 then. Alex at Caltuned has my m20 project 02 and will be finishing and fixing my mistakes when he finds the time. Should be nice just like all their other cars.
Ill be at the next vintage!

[88SuperETABD]

Hot Damn! This work is beautiful, Is this your car andrew? or a company car? I remember talking to you about your 02 over the phone...

[SirSwag]

Sick build man just blew my mind!!

[SkiFree]

88SuperETABD - This is my personal car, currently it sees about 60 miles a day. I do remember talking with you!

Couple little updates.

STEREO SETUP -----------------------------------------------------------------------

Radio - Finished wiring diagram for an ipod-controlled hidden stereo setup. Thanks to the guys in the audio section for edu-ma-cating me.



Tried to work with the rusty becker radio, didn't work out so good. It was just too far gone for me and my limited electronic knowledge. Instead I found a practically new-old-stock Becker Europa that was miss-labeled on ebay, got it for a steal! It was wrapped in 1972 newspaper, but USPS managed to crack the faceplate during shipping. Ordered a nice replacement from Becker Autosound.

Dismantled the radio for a good cleaning, put on the replacement faceplate. Pretty excited to get this bad boy in there.


TRANSMISSION ---------------------------------------------------------------------

As mentioned before I'm going to combine the 4-speed bellhousing (getrag 242) from the euro E21 320/6 with the guts of the us-spec. E21 320i (5-speed getrag 245). Combined this should give me a tranny that does not require me to do any cutting to the transmission tunnel.

Steve (not sure on user name) was kind enough to ship me the euro 4-speed tranny, to mate with a 245 here in the shop.

Lined up the transmissions to get a visual understanding of the differences. Note the M20 260 bellhousing and case is pretty thick, hence the reason behind the need to expand the tranny tunnel.



You can also see the bellhousing dimensional differences between the M10 and M20 tranny's

[SkiFree]

Pretty stoked! Got the go ahead to start playing around with velocity stacks with the intent to put them into production (of course this coincides nicely with this project). Since Weber production switched from Italy to Spain, slip-fit velocity stacks for the sidedraft DCOE40 carb have only been produced in the 1.5" length. I want something longer (either 3-4" straight, or 3" angled [to clear brake booster]).

Playing around yesterday ....


Alfa inspiration (since they too have clearance issues)....

[SkiFree]

Getting closer, next its off to the powder coater. (Thinking red, like the old Alpina A4 injection setups.)

[SkiFree]

Heyoh! Back from the powder-coaters. One more thing down.



Another "workbench update" almost ready to start putting in the stereo. Will have writeup in within the next couple weeks.

[2002maniac]

Great build! I miss my 2002s.

[CorvallisBMW]

I can't wait to see those Webers on the engine!

[FunfGan]

This is so fantastic.

[deutschman]

Wow Andrew! Great job on those stacks. They look great, and I think they will sound really nice as well.

[SkiFree]

I can't wait to see those Webers on the engine!

Preaching to the Choir! Can't happen soon enough.

Clutch and Flywheel setup:



Lightened/balanced stock 325i single mass flywheel:

18.5 pounds stock machined down to 13.8 pounds. Wouldn't want to go more than that. You can see that machining the lip any closer to the ring gear can cause the ring gear loose. You'd be able to flip the flywheel over and extend the center bevel for a bit more weight savings but the minute amount of material you'd be able remove doesn't justify the added effort/expense in my mind.



E30 M3 Pressure Plate (not sport):
Stiffer center diaphragm spring over the 325i pressure plate (but not quite as stiff as the Clutch Masters +1 pp), should be just right for a hot-rod street engine.

E30 clutch disk and throwout bearing:
Debated going to Kevlar, but since there will be a fair amount of stop and go the stock disk should be up to the job.

Not bothering with the Spec and F1 setups, simply have seen too many fail. Common problems and failure points: tolerances on clutch disk splines not very accurate, pressure plate side straps made from some less-than-ideal material (snapping under a hard shift), disk de-laminating, etc. While they are a bargain, just not worth skimping on.

[catuned]

Sweet

[MR 325]

That will be the perfect setup Andrew. Still nice and drivable!