Building a low compression 390?

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Apr 26, 2007 | 02:17 PM

#16

krewat

FTE Leadership Emeritus

Joined: Jul 2002

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From: Long Island USA

Quote:

Originally Posted by rusty70f100

Hey, 3 compression rings and an iron top groove might be good on a forced induction motor!

Quite true. But then you get 50% more wear in the bore

Apr 26, 2007 | 03:18 PM

#17

rusty70f100

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Joined: Jan 2003

Posts: 8,600

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From: Iowa

Quote:

Originally Posted by hoxiii

Allright, I've never gone through and ordered a set of full custom pistons, so I have a quick question. I know I can order them with however deep or shallow of a dish I want, but is there a manufacturer out there that will cut the dish to the exact shape I want, like a mirror dish?

If not I'd be better off buying a set of off the shelf TRW flat tops and then send them off to a shop with autocad files of how i wanted the dishes cut.

Justin

Having not ordered a set of custom pistons before I couldn't tell you. I've come close to ordering a set, but always found what I needed in stock form. I would advise you to contact Ross pistons here:

http://www.rosspistons.com/

Be advised they aren't cheap.

Contact your machine shop about cutting a dish in the TRW's.

Apr 26, 2007 | 04:37 PM

#18

hoxiii

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Joined: Jul 2003

Posts: 2,711

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From: Pittsburgh

I know they aren't cheap, i've looked into a couple sets and all of the piston manufacturers want around $800-$900 a set.

That's why depending on if i could get exactly what i want or not from a manufacturer i may be better off buy the off the shelves and getting them modified.

Justin