From MrReel325_at_juno.com Fri Oct 10 13:33:34 1997
Subject: 1984-85 e to i modifications
1984-85 e to i modifications
Hello fellow Bimmerheads. If you are as crazy about the E30 325 cars as i am
then like me....you are always searching for ways to improve your car. A few
years ago i was faced with a dilema.......get a 90 E30 M3 (Salmon
Silver/Silver w/80K) for 17K or just keep the old faithful 85 325e
(Bronzit/Black w/90K), paid for. Although the E30 M3's are stunning both in
performance and appearance, I decided to keep the 85 and modify it.
My mods include an engine transplant....but not with just an "i" engine. I
didn't want to go from a 2.7 to 2.5 just to get Revs and HP from the head and
put out about the same torque as the ETA engine did before. It didn't make
sense to me. So after some studying...and calls to the almighty Pete
McHenry, I found that I couldn't just bolt an "i" head to an "E" block with
out changing pistons....and the cost of that is almost like buying another
The basic Motronic was thrown out...in favor of a Motronic 1.3 unit (89-91).
For the 86-88 Eta cars.....this was a piece of cake because the C101
connector (fuse box) was the circular type.....same as all "i" cars. But the
earlier pre 86 cars have a rectangular C101 connector which has to be
modified (I converted it to a circular connector and added 2-3 more wires for
the "Check Engine" light and M3 oil temperature sender).
To keep this short heres a list of my mods:
Engine: 2.7 liter "i" engine, K&N filter, Jacobs ignition
Lubrication: Oil cooler
Management: Motronic 1.3 w/ chip
Transmission: Auto to 5spd conversion (Getrag 260) single mass flywheel.
Exhaust: "i" complete dual pipe exhaust (catalyzed) w/ Ansa rear muff.
Suspension: Boge Turbo Gas, Eibach Springs, M3 control arm bushings, M3 sway
bar, Eibach Strut Tower Brace.
Rear End: 3.46 LSD
Exterior: factory front spoiler(with all BMW underbody, brake ducts), M
technic rear tail (not M3), side skirts, apron, 86-88 bumper fillers, mirrors
(all body color matched). Hella Elypsoid Headlight conversion, Blacked out
chrome, Blacked out Grill, Blacked out widow trim, tinted side markers and
clear front turn signals.
(1/98) I have added Tinted Taillights and ATE POWER DISC brake rotors and
Stainless Steel braided-Teflon Brake lines.
Interior: M3 instrument cluster(reworked) (modified with "Check Engine"
light, working Oil temp gauge), M-tech steering wheel, factory tweeter
assemblies, M-striped shift boot, leather wrapped hand brake handle and boot,
lighted switches, updated door panel clips.
Wheels: 16x7.5 TSW Blades with Nitto NT501's
I haven't dyno'd my car yet ....but I estimate 195 HP / 200 torque
conservatively. Not bad for an engine built with genuine BMW parts
unmachined. I plan to raise the compression, Shrick 272 or 288 cam, big bore
throttle, and port work. I still want an E30 M3.....but I am no longer in a
rush to get one. My car looks damn good but the flares on the M3 are
legendary. I hope this info will enlighten those of you who have an early
E30 or E28 Eta car.
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