what turbo for m20b25?

[einstein57]

Most people feel 18 psi is fine fine a proper tune and a stronger clutch.

[e30leigh]

18psi with factory internals? seriously? the pistons can take that?

[ak-]

18psi with factory internals? seriously? the pistons can take that?

Proper tune is the key as he mentioned.
Skim e30tech. Everyone is doin' it.

[sayed ali]

Stock m20 can handle more than 25 psi but with a pretty PERFECT TUNE ;)

so many people have done it ..

[einstein57]

I'll be in the 20+ club in a couple weeks.

Also my buddy is selling a low mileage stock turbo from his evo8 for $250. He was boosting 30lbs so i think it can handle 12psi on a 2.5l motor no problem.

[e30leigh]

evo turbos are available locally. that real interesting with how much boost the m20 can take. thats great. i guess when the time comes to getting it all together and we sit her on the dyno we will just keep going till we get some nice out of it.

[0000000000]

Yea the internals can handle a lot lol, if you run MLS and head studs. My buddy ran 23lbs for the longest time lol.

[NOTORIOUS VR]

MLS is a fail... don't even bother with it as it will leak eventually... if you want to run over 20 psi to be safe just o-ring the block.

Otherwise stock HG all the way.

[The Humjet]

Chuck a BA/BF Falcon turbo on it. They're pretty cheap second hand. I know a guy running one on his vl turbo factory cast manifold, Falcon Gt35 turbo internal gated no boost control issues what so ever he pushed 354rwkw.

[Firefighter3244]

Wow. I had no idea the stock motor could handle that type of abuse.
I have a 87 325IS and was going to go with a newer motor just so I could boost it.

But sounds like my best bet is get another motor, Rebuild it with quality parts
and Headstuds and I'll be fine. I'm looking for 300WHP.