m20 engine craziness

[mikebloco]

Stupid thought.....so I know the i head is better in every way except the combustion chamber is bigger. So can you put the springs and cam from an i motor in a eta cylinder head and run it on an i motor. Compression ratio would raise slightly but the only thing that made me think of this is, is because eta heads are cheap as hell.

[digger]

pretty sure the domed m20b25 pistons will hit the eta head

[Cabriolet]

pretty sure the domed m20b25 pistons will hit the eta head

yup. you cant put an eta head on an I bottom. it wont clear the crown of the piston.

Also, OP, this could be the 3rd dumbest idea in practicality I've seen posted this year.

[mikebloco]

yessss

[MR 325]

Eta heads are cheap for a reason. They are not desirable.

You CAN modify an Eta head by porting/polishing to match i gaskets and drilling oil journals to make some good power but it would need to be paired with the Eta bottom end. It's a lot of work though.

[StereoInstaller1]

I have a 731 I will sell you if you think you want a high compression 2.7l

[4x4_e30]

A standard "i" head machined down to 4.909" has a combustion chamber volume of 37cc's. The same as an "e" head.

[mikebloco]

It's not that I want a high compression 2.7l, I just want my motor to not smoke as much. I'm going to do the valve seals this month and hopefully that's does the trick.

[AndrewBird]

Aren't the ports on an eta head smaller than an i?

[Hooffenstein HD]

Aren't the ports on an eta head smaller than an i?

Yes. A lot smaller.