FOR SALE: 3.1 pistons

Shaun41178(2) · Post by **Shaun41178(2)** » Tue Apr 12, 2005 10:30 pm

I have decided I am going with different pistons. 12:1 is just too high with boost. So I am getting rid of these.

Federal Mogul H562CP .040 oversized.

These are for a 3.1 iron head motor and is .040 oversized. With iron heads the compression ratio will be approx 8.8:1.

The skirts are coated with a teflon liner to reduce friction.

These retail for $30 a pop or about $180 for all 6. I want $110 shipped. They are still brand new and in the box.

THE PUNISHER · Post by **THE PUNISHER** » Wed Apr 13, 2005 1:42 pm

Whyt don't you actually decide to do something with all these parts you have...

The Dark Side of Will · Wed Apr 13, 2005 2:49 pm

Selling that cylinder head rack any time soon?

Doug Chase · Post by **Doug Chase** » Wed Apr 13, 2005 2:54 pm

So that would make these pistons something like 3.540"?

Are your compression numbers for a 3.1 or 2.8 crank? What's the compression height? I'd like to figure out compression in an iron head and aluminum head 2.8 to see if these will work for any projects I have in mind.

Shaun41178(2) · Post by **Shaun41178(2)** » Wed Apr 13, 2005 5:29 pm

these are 3.1 iron head pistons so I calculated the CR with a 3.1 crank.

You can't use these with a 2.8 crank unless you get custom rods. Compression height is stock for a 3.1 piston. I want to say 1.45 or something like that We had a chart posted here recently with all of that stuff.

But its the stock compression height.

With iron heads CR will be approx 8.8:1

With aluminum heads the CR will be abuot 11.8:1

Thats way too much for boost so I want different pistons for my al heads.

Yes bore size is 3.542 or there abouts with these pistons..

And Jon, you can lick my Ballzack