E21 Turbo M10 into an E30?

[SLOWER]

i didnt bump it

[Farbin Kaiber]

^ You did see that this is a four year old thread, right?

[SLOWER]

im in the middle of a e21 to e30 swap right now.

im reusing everything off the old e30 motor i can. if it looks diffrerent im changing it.

if you have both motors you should be fine is my guess. one just gets scrapped.

but seriously, why would you tear a sweet e21 apart? id rather have that e21.

[e30matty318]

were the motor mount locations the same? If they were different what did you have to do?

[Hadrian]

I think its the other way around, my cars an 82 320is and it has the injectors in the head

Is it possible someone changed the engine for an older one for larger displacement?

[Hadrian]

I wouldnt go with "good", i would go with "kinda"

Reason?

[Mr Deagle]

People also do custom CIS turbo setups, they work good.

I wouldnt go with "good", i would go with "kinda"

[Projectp]

IIRC the early E21 M10 engines have the injectors in the cylinder head, late E21 M10s have them in the inlet manifold.

I think its the other way around, my cars an 82 320is and it has the injectors in the head

[winstontj]

You can always just bore out the injector bungs in the head. You only need to bore a little to accept the standard e30 size injectors and seals. We do this with the 2002 tii manifolds all the time. I'm taking an early e21 manifold (log style) and boring out the injector bungs for a megasquirted setup.

Only downside is if you put a ton of work into the head and then it cracks....

Sounds like there already may be a ton of work (porting, CC, valves, cam, etc) into that head)

[Hadrian]

IIRC the early E21 M10 engines have the injectors in the cylinder head, late E21 M10s have them in the inlet manifold.

There's nothing wrong with a turbo CIS system. Porsche, Volvo and Audi did it along with others. People also do custom CIS turbo setups, they work good.

[ecorrea21]

Some e21 motors have injector bosses in the head and others have the bosses in the manifold.

If it has the injectors in the head, you will have to plug those bosses and use a e30 318 manifold/injection.

I have one of those heads with the injector bosses in the head. I was thinkong that would be a great place for wet NOS nozzles.

[Roadsterd]

You will need the 318i oilpan.

Thanks, I was hoping someone would answer that.

[Good & Tight]

You will need the 318i oilpan.

[Roadsterd]

Some e21 motors have injector bosses in the head and others have the bosses in the manifold.

If it has the injectors in the head, you will have to plug those bosses and use a e30 318 manifold/injection.

Ah, the intake manifold isn't factory and I don't recall seeing injector bungs in the pics from the engine build. So I guess that means I will have to plug the head. Hopefully I can get the aftermarket manifold modified to fit the e30 injection, seems like going back to a stock manifold would be a waste.

[2002maniac]

Some e21 motors have injector bosses in the head and others have the bosses in the manifold.

If it has the injectors in the head, you will have to plug those bosses and use a e30 318 manifold/injection.