Ok so does anyone on here know how far you can push an m20 b25 or b27 before running into reliability issues? I wanna build a DD E30 and would like to see how far i can take the straight 6, before i decide to try. If its not worth it i'll just throw another motor in it and get to having fun. I looked at the turbo kits, the internal kits, the stroker kits, but nobody has anything with them together that i can see and compare. Basically i was thinking about stroking the motor to somewhere around 2.8 - 3 liters, adding a remote mounted turbo ( probably some where under the car, or at least out of sight) and running methanol injection to eliminate the FMI. Any how, enough Daydreaming....
anyone doing anything with their E30's? Anyone know anything? Thanks

 

I know one guy from Austria who has mad skills in turboing E30's

have a look at his machine

BMW e30 m5 turbo ......austrian fastest [ 3er BMW - E30 ] - www.BMW-Syndikat.de [Fotos - Bilder - Stories]

Its pushing 840 bhp out of 22 PSI and is capable of ~1000 bhp @ 26 PSI

he also has a methanol injection for his FMIC, runnning with nitrous and also a fuel catch tank.

He has got his email adress published in this photostory, so I think its ok to hit him up


I dont know if he can explain you everything in the imperial measurement system, since austria also use the metric system.

If there are any language issues,hit me up, I'll translate your questions or his answers.

 

there are tons of people making good numbers with stock internals, first things first go on e30tech and get yourself one of the premaid plug and play megasquirt kits that a few of the guys over there make. then go to 666fabrications.com and get yourslef a manifold. get a precision intercooler and turbo and the piping can be bought from a local shop like gearhead. only engine parts i would change would be head studs and a cometic gasket, this setup should get you over 300whp.

 

log manifold off the diesel with a little work fits the m20 block. i ran on stock internals, big injectors, walbror pump, mega squirt gosh that was fun for a while until the stock head gasket blew then i had an offer that made me sell the parts and shes been stock ever since. put down 270ish on a mustang dyno. super fun in a convertible.

the m20 LOVES boost. the auto trans on the other hand hates it with a passion lol

 

Holly Shit that turbos huge....... Thats way bigger than i was thinking of running! Thanks fellas, Bam just turned me on to an E30 so hopefully i'll be able to get this deal going....

 

i would stay away from the td manfold only because its a decent amount of work to locate and modify it and it really isnt a very good manifold.
however if you are on a budget it will work, u may also need a clutch but first thing you should do is go megasquirt, even without the turbo setup it will be a night and day difference because that air meter is terrible. in the long run an awesome budget motor build is to use the eta motor with a turbo deisel crank and rods and some forged pistons and a 325i head these setups can handle 500whp and would prolly only cost you 500 bucks if you can build an engine yourself.
i have a feeling 300whp will be good enough for quite a while, a 2600 pound car with 300whp and some good handling abilities is a blast.
btw 270whp on a mustang dyno is about 310whp in actuality, the dynojet dynos are much more accurate.

 

Thats good to know. I was thinking between 3-400 whp would be plenty for a DD at least until i started breaking things...
How difficult is it to find the parts mentioned above?
I wonder how difficult it is to do machine work???? I dont foresee an issue with tearing the block down and replacing the internals, with the exception of cleaning everything up and making sure it all fits properly. I have heard that the stock internals were good up to 20lbs? Not so sure on that though, new to forced induction. Last random thought for the post.... How much weight can you take off and still be "budget"

 

finding the parts is not the easiest thing in the world your best bet might be to buy em right form bmw, of course at that point they may not be much cheaper then a forged unit, eagle seems to have pretty reasonable prices usually.
you cant say that there good to 20 lbs because 20 pounds on a 50 trim is not quite the same as 20lbs on a 40r but stock should hold up to around 380whp with a really good tune and some head studs and a gasket, you might want to go slightly taller on the gasket to lower compression but too tall and you will have timing issues.

 

I see...