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e21 swap - Click HERE for Original Thread

omniman69
has anyone here ever swapped a M20 engine into a E21 320i?, or know of anyone?, or have the info that might be related into such a task?.

picked up a '79 320i that needs frost plugs, and my '81 733i has a pretty rough body. So put 2 and 2 together, 6 cyl and 5 spd into a light 320i should be a fun car once finished and that is my overall plan.

mike

EK9Hatch
I would do a search on google for a BMW forum. They would have much more useful tech info.

Jamie

omniman69
i have, i am on bimmerworld, the 320i forum, the e23 forum, i am checking everywhere so in case there is someone out there that does know, i won't miss them.

never know, there might be someone on here.

mike

arabian_ryda
it will fit. but im not sure if it will be a bolt on. my uncle ust to have a m5 swaped 1979 310 race car(europe version) he had to modify the fire wall a bit that engine was huge in such a small car.

omniman69
the engine should drop right in. Like i said, ALPINA built a bunch of these cars, and from what i have found so far there was no firewall issues.

mike

Flamewerkz
Bimmerforums.com is where I always go. http://forums.bimmerforums.com/foru...p;highlight=m20

http://forums.bimmerforums.com/foru...earchid=6004581

omniman69
thnx, thats exactly what i needed.

mike

quertreiber
The 733i engine is a M30, not a M20. M30s are bigger than M20s and they don't fit without work.
Your 733i is a standard? Thats rare. I'm looking for a M30 standard tranny.
And the E21 came from factory with the M20 engines. They fit without a problem.

omniman69
my 320i came from the factory with the m10 4 cyl, the 323i and the 325i cars came with the 6 from my research.

My plan is to swap the crossmember from a 6cyl car, or build up the little 4 cyl and swap the 5 spd i got in my shop while the engine and trans are out since i have to do the frost plugs on it.


mike

quertreiber
Turbocharge the M10. The M10 is the strongest engine BMW ever build. Run 15psi and you kill every E30 and e36. You can install a nice turbo setup for around 2000 Dollar.

JustinL
I used to have a turbo M10 and it IS a tough engine. Here's the build up thread for the guy I sold the kit to.

http://www.msruns.com/viewtopic.php?t=22431

omniman69
a turbo build is lookin more and more interesting right now, lol.

mike

quertreiber
Turbo is the way to go. Cheap and lots of power. I drive a M20 Turbo and I'm pretty even with an E46 M3. 335i no problem. And my setup was only around $2500.

b_w.
will it beat every e36:D

turbo is definately the way to go. any specs on your setup?

omniman69
ya?, specs would be nice.

not to "replicate" your build, but it might be a good base to start with.

mike

quertreiber
My setup is a very basic setup. T3T4 turbo, bigger injectors, FMU and 9psi boost. Most of the stuff I bought on ebay. It is a budget setup. When you are really interested in turbocharging a bmw take a look on www.e30tech.com
I never raced a supercharged M54 but I drove some at work. Dinan, Autowerke and VF. Even the Autowerke Stage 2 Z3 M Roadster would loose. My car is quicker, believe me :D You need a supercharged eurospec S54.




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