Few M30 turbo questions.

[Bimmer_man]

So i am getting a M30 soon and need to see what the community can assist me with.

this engine will be going into a special e30 i will disclose once i get more parts for it. anyhoo here are a couple of my questions.

the engine is a M30B35 and was KAMotors M30. I have a new crank for it. for the swap i know i can use the M20 harness or the M30 harness. what would you all recommend?
Also if anyone can assist with this. I would like to know the port size of the M88 individual throttle bodies compared to a S38B35/B36 throttle bodies. ( yes one of those will be installed on the engine.
I also need to know the best radiator to use with this build. I want to make sure the engine will stay cool.
Note: the engine will be turbo charged as well.

[Lurker27]

M20 and M30 harnesses are identical, M30 is probably easier.

I haven't had overheating issues with an e28 535 radiator but a mishimoto would be better. you can fit a MUCH thicker radiator if you go wasted spark AND get a distributor plate delete. I would 100% do this, the spark is MUCH stronger as well.

I use an M60 throttlebody, which is >3.5" bore. If you're doing a flipped manifold i recommend a big V8 throttle body and 3" charge piping since it adds to plenum volume, which the M30 lacks in stock configuration.

Also this is obvious but megasquirt or go home

[Bimmer_man]

I plan on a coil on plug system because I think its awesome. So the destributor delete is on the list. And I'll more than likely get the mishimoto radiator just for the extra security.

[e30m3s54turbo]

I'm using 55 pin m20 harness with (Whowho) mega squirt.

M88 b35 46mm itbs

S36 b36 48mm itbs

S38 b38. 50mm itbs

I'm using e28 radiator. I will be using oil cooler.

[Bimmer_man]

Thanks raul.

So when putting the M30 in the furthest back position, Is there anything that needs to be removed as far as climate control to fit the M30 because I want to retain all the climate control stuff.

[CorvallisBMW]

No, you should be able to keep all of your climate control stuff. You can possibly keep A/C too, depending on how thick your radiator is. An e28 535i rad will allow you to keep A/C, but if you go with wasted spark and a thicker aftermarket rad, you may not be able to fit the compressor.

You'll also need a very large (minimum 16") electric fan to keep it all cool.