High compression piston idea
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Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
High compression piston idea
I've got an idea for a high compression piston for the 4.0L. It's to use a 383 Chevy piston. Here's the specs:
http://www.kb-silvolite.com/performa...tails&P_id=222
I figure, since stock the 4.0L has a wrist pin diameter of .945", we could use a thicker bushing to take the small end of the connecting rods down to .9272" and use the Chevy size wrist pins. You would also have to bore the block .050" oversize to 4" bore to be able to do this.
As far as I've found, here's how the compression heights differ:
383 piston: 1.433"
Stock 4.0L piston: 1.441"
This is probably close enough we could deck the block and get to zero deck, or close to it.
The purpose would be for a high compression 4.0L, possibly for race use or for use with a high octane fuel such as E85.
What do you think?
EDIT:
You know what, never mind. I just found this beauty:
http://www.kb-silvolite.com/spistons...tails&S_id=477
http://www.kb-silvolite.com/performa...tails&P_id=222
I figure, since stock the 4.0L has a wrist pin diameter of .945", we could use a thicker bushing to take the small end of the connecting rods down to .9272" and use the Chevy size wrist pins. You would also have to bore the block .050" oversize to 4" bore to be able to do this.
As far as I've found, here's how the compression heights differ:
383 piston: 1.433"
Stock 4.0L piston: 1.441"
This is probably close enough we could deck the block and get to zero deck, or close to it.
The purpose would be for a high compression 4.0L, possibly for race use or for use with a high octane fuel such as E85.
What do you think?
EDIT:
You know what, never mind. I just found this beauty:
http://www.kb-silvolite.com/spistons...tails&S_id=477
Last edited by rusty70f100; Sep 1, 2006 at 02:24 PM.
