what turbo for m20b25?

[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.

[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.

[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.

[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.

[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.

[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.

[sayed ali]

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

so many people have done it ..

[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.

[e30leigh]

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

[einstein57]

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

[e30leigh]

they seem quite well sized to suit. but i can get gt35's here cheep and they are ment to be good. not a rubbish item made in china. but when the time comes i might spend the extra money to get the better turbo.

id say id run the antisurge 4" intake front housing if i got the t3 6262

[sayed ali]

thats not too bad. is there anything else done to the motor other than the turbo hanging off the side of it?

Stock motor..

Btw the precicion t3 6262 is better in my openion, I'm planning to put in one oneday:)

[e30leigh]

i have a precicion t3 6262 and it comes in at a perfect time and make good power

what do you boost and when does it come on?

i compaired them quick to a gt35. and they are about the same size.

[bmwdready347]

i have a precicion t3 6262 and it comes in at a perfect time and make good power

[e30leigh]

i havnt found a gt30 in t3 flange. that doesnt mean i cant get it.

and 12psi is almost 1bar. im just saying 12psi because i know the motor is going on handle that safely. if the motor can take more. then we will give it more.