I need some BMW engine skooling, help me out

[tbruz]

So I just bought my e30 in a spur of the moment needing a car deal. Came out with a good deal and I love the car but I know nothing about BMW engines just ford and Chevy small blocks. Help me out all I know Is I have an I block and a M head supposivly.

[LJ851]

You didn't ask any questions, bro. What do you want to know?

[devon.818]

uhm no

no no no lol
year and model?

options-
m20b25 good, keep it
m20b27 no, dont keep
m42 no dont keep
m10 hell no
1988 m20b27 luck bastard
lets just stick to US

[Cabriolet]

shoot me a PM and ill help you out. im in the San Jose/Campbell/Cupertino area.

[immajackuup]

m42 is a good motor why not keep it?

[devon.818]

m42 is a good motor why not keep it?

because 2 less cylinders than the eta, and the eta is the ultimate shitty motor.

because racecar damnit.

[YosemiteSam]

Might it be swapped? M5x block with an S5x head?

To OP: pictures would help a lot.

[tbruz]

It's a 85 and I got it from a chick haha all she knew was I block and m head put in 6 months ago because she slung a rod in the last motor it was a turbo car when she acquired it from her ex boyfriend.

[tbruz]

I'll take pics tommarow I'm getting exhaust put on now because the cat had a hole in it haha

[devon.818]

is the intake manifold plastic or metal?

[GaryE30]

uhm no

no no no lol
year and model?

options-
m20b25 good, keep it
m20b27 no, dont keep
m42 no dont keep
m10 hell no
1988 m20b27 luck bastard
lets just stick to US

typical ignorant post

[acolella76]

m42 is a good motor why not keep it?

Because they have no torque at all

It's a 85 and I got it from a chick haha all she knew was I block and m head put in 6 months ago because she slung a rod in the last motor it was a turbo car when she acquired it from her ex boyfriend.

There is no 'M' head that bolts onto an M20. Take pics. I am thinking either you got taken for a ride or it's an M5x with S5x head (which also means you got taken for a ride, M heads are no different than their base model variant..)

[ScHpAnKy]

because 2 less cylinders than the eta, and the eta is the ultimate shitty motor.

because racecar damnit.

lolno

m40 is the ultimate shitty motor, m42's have another cam and hydraulic lifters.
also, eta's have 20 less hp than the m42 stock with more weight.

Because they have no torque at all

so much hate! I'd rather take a 168hp m42 over an 168hp m20 anyday, torque or no torque... it's just a better engine in every sense except for displacement.
At the same power levels the m42 is always going to rev faster, like being in the higher revs better and weighs less.

[devon.818]

lolno

m40 is the ultimate shitty motor, m42's have another cam and hydraulic lifters.
also, eta's have 20 less hp than the m42 stock with more weight.



so much hate! I'd rather take a 168hp m42 over an 168hp m20 anyday, torque or no torque... it's just a better engine in every sense except for displacement.
At the same power levels the m42 is always going to rev faster, like being in the higher revs better and weighs less.

lets see, buttchugz has a built motor on forged internals, and gets close to 300whp, CLOSE TO!

frozensolid has a refreshed m20b25 with STOCK internals and STOCK HG making almost 500whp! WHAT!?

yep m20 wins

[acolella76]

lolno

m40 is the ultimate shitty motor, m42's have another cam and hydraulic lifters.
also, eta's have 20 less hp than the m42 stock with more weight.



so much hate! I'd rather take a 168hp m42 over an 168hp m20 anyday, torque or no torque... it's just a better engine in every sense except for displacement.
At the same power levels the m42 is always going to rev faster, like being in the higher revs better and weighs less.

Different strokes for different folks I guess, and I mean that literally. There is no replacement for displacement. And when has an M42 made 168hp stock? They made 134hp/127tq from the factory.

lets see, buttchugz has a built motor on forged internals, and gets close to 300whp, CLOSE TO!

frozensolid has a refreshed m20b25 with STOCK internals and STOCK HG making almost 500whp! WHAT!?

yep m20 wins

BMW also sleeved down an M10 to 1.5L and produced close to 1300hp, CRAZY!!!!! Boost is totally different than NA.