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For Sale / Re: Conforti & Dinan chips for the m42
« on: April 30, 2016, 10:54:46 AM »Price dropped on Dinan chip, I paid less than I thought.
What is the new lower price?
Thanks,
Stan
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Price dropped on Dinan chip, I paid less than I thought.



I weighed the flywheel today at 28 lbs without the clutch. I'd rather not have to buy an M20 flywheel and change the starter.You can remove the starter ring gear from the M42 flywheel and put it on the M20 flywheel to retain the M42 starter.
It is washer for chain guide.
I'd be looking for a late-model M42 myself. Improved cam chain guides, lower-maintenance serpentine accessory belts. The later DISA manifold won't fit under the E30 hood, from what I've heard. Not sure if your oil pan would swap over either - it might - but later M42s got the E36 single-piece rear sump setup.
I'd have a custom exhaust made up - the manifold looks great but IMHO the M42 cat-back is a bit stuffy.
As for handling, I wouldn't go larger than 15" wheels. Five nice light rims with small tires can save a lot of weight. IMHO larger wheels look a bit too modern.
I'd tune the diff ratio to the speeds you'll be driving. My 3.73 is good for highway; perhaps a 4.1 or even a 4.27 to improve acceleration if you do urban drives. Late model Z3s came with a torsen geared diff that might be a good upgrade. If you can find a small-case diff it'll save you 20 pounds. A smaller battery might help - those lithium starter batts are coming down in price and they're a whole lot lighter.
A light single-mass clutch would help.
I'd also optimize the motor with mild upgrades. Do the hose mod (delete the TB heater), upgrade the injectors to 22# 4-hole disc-type, delete P/S & A/C. Biggest efficiency differences I saw was a solid 2.4 MPG improvement after upgrading to 19# 4-hole injectors and the hose mod. I added another 1.1 MPG with really thin oil - synthetic 0w20. I wouldn't recommend oil that thin, however. Used oil analysis reported uncomfortable amounts of iron, lead, aluminum and chromium (cams, bearings, pistons, rings). I run 15w50 now, it brought the wear metals back down.
Install an electric fan to replace the engine-driven one. All synthetic lubes, dilute the coolant as far as you feel comfortable (I run 66% distilled water). I'd also run a higher-temp thermostat. A MarkD chip would finish off the package nicely.