shelf stock or custom pistons?
shelf stock or custom pistons? This may not even be possible with a custom piston but what I want is a forged piston set for a LS1 that is compatible with nitrous (200-250 shot), for a 3.905 bore, 4.00 stroke and a 6.200 rod. This will be a pump gas engine. The closest I have found in shelf stock is from Arias but has very little material above the top ring and is a little short between top and 2nd rings as well for nitrous use.
Any suggestions or comments are appreciated, Thanks, Carl.
Any suggestions or comments are appreciated, Thanks, Carl.
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Joined: Aug 2006
Posts: 326
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From: North Bay, CA
With the right ring gaps, any off the shelf JE piston will handle that kind of nitrous use - I know they have a flat top piston in that size. With a good tune and no detonation you will never have a problem.
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Joined: Mar 2006
Posts: 302
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From: Sarasota, FL
Run a shorter rod. With a heavy nitrous load you want to be moving the top ring down, not up. Why wouldn't you just run the "standard" aftermarket 6.125" rod? Or you could step up to a tall deck block... 
Last edited by Gannet; Sep 30, 2007 at 01:31 PM.
Machinistone, I looked at JE's website and didn't find such a piston, I plan to gap the rings for nitrous use but thanks for the suggestions, they are appreciated!
Gannet, I already have the 6.200 rods
. I know I want to move the rings down I re-read My post but didn't see where I gave that idea?? Thanks for the suggestions as I don't claim to be a guru.
Update...I should have just done the math before posting such a question, with a 6.200 rod and a 4.00 stroke that leaves only 1.050 for comp. height which makes for a short ring pack to be running much nitrous...duh, sorry for bothering everyone. Now if they made a pin with a diameter of say .727...oh well I wouldn't be able to afford it anyway. Carl.
Gannet, I already have the 6.200 rods
. I know I want to move the rings down I re-read My post but didn't see where I gave that idea?? Thanks for the suggestions as I don't claim to be a guru.Update...I should have just done the math before posting such a question, with a 6.200 rod and a 4.00 stroke that leaves only 1.050 for comp. height which makes for a short ring pack to be running much nitrous...duh, sorry for bothering everyone. Now if they made a pin with a diameter of say .727...oh well I wouldn't be able to afford it anyway. Carl.
