M20 Turbo

[619E30]

I am planning on building a m20 turbo'd motor. My question is, could a freshly rebuilt m20 motor (stock) be capable of handling a turbo (about 15-20 lbs. of boost) ?

I was thinking of using Raceware head studs, ARP main bolts, rod bolts, and mls gasket.

[619E30]

Bump

[ak-]

No,

[xwill112x]

your going to need low comp pistons for more than 12-13 psi

[lifeiskaos]

I am planning on building a m20 turbo'd motor. My question is, could a freshly rebuilt m20 motor (stock) be capable of handling a turbo (about 15-20 lbs. of boost) ?

I was thinking of using Raceware head studs, ARP main bolts, rod bolts, and metal gasket.

Absolutely. I wouldn't push much more than that though. There are a bunch of guys on e30tech running very similar setups.

[619E30]

http://www.e30tech.com/forum/showthread.php?t=59124

This guy is running 20psi on stock internals with head studs and metal gasket. Had this set-up for a year now

[lifeiskaos]

I would avoid an MLS gasket. OEM headgasket with orings is where it's at.

I don't know why xwill or ak said you can't run that much boost on a stock engine...

[xwill112x]

This guy is running 20psi on stock internals with head studs and metal gasket. Had this set-up for a year now

i always was told 12-13 psi would pop stockie internals.

[619E30]

I'm confused. Wouldn't the MLS gasket be stronger than stock?

[lifeiskaos]

I'm confused. Wouldn't the MLS gasket be stronger than stock?

Sure, but it'll probably leak, and you'll probably end up melting a piston or bending a rod.

OEM headgaskets are like fuses. If you fuck up the tuning, get detonation, overheat a bit, you made a $50 mistake. But if you don't make any mistakes, OEM headgaksets can hold plenty of boost (power), especially with orings.

[619E30]

What's the difference between orings and stock rings (sorry, sorta new to turbo scene)

[lifeiskaos]

Grooves are cut into the head or the block and wire is inserted into the grooves, so it protrudes past the surface of the head or block. That wire compresses the headgasket so it seals better. Stock engines don't have any orings.

more info: http://www.e30tech.com/forum/showthread.php?t=22030

[619E30]

I see. So where could I find those?

[xwill112x]

you have to get the block and head machined for them, probly have to have them custom made

[619E30]

Fuck, haha. So if you could turbo the stock m20, how come most people build a low-compression stroker?