Recommendations for mopar 383 ss

Chuck Norton · 12-03-2007, 11:21 PM

1. Use the pin dimension as listed on the NHRA sheet. Whatever it says is the operative spec.
2. Use the compression height for your application as listed.
3. Use the combustion chamber volume spec as listed. Don't factor in valve notches. It is what it is.

Div 5's information on deck height is the way it was a few years ago. The current rule allows moving the piston/deck height to accommodate the available gasket. If you have to push the piston out of the hole a few thousandths to make up for the fact that the only gasket available is too thick, it will pass.

Paul Precht · 12-04-2007, 01:53 AM

79.5 cc is the min for 69.The AVS flows about 630 CFM Give me a call if you need more info, 570 735 3895 Eves EST, Paul.

bsa633 · 12-04-2007, 02:25 AM

any pin is ok in SS and the .990 pin is the most common in use but there seem not to be any legal aftermarket rod ava. with that pin bore,but you can ofcourse bush the oem rod,not sure how they feel about bushing down an aftermarket rod that has the specs shown already? have you seen the other thread that should be interesting for you?
http://classracer.com/classforum/showthread.php?t=8181

Jeff Lee · 12-06-2007, 01:02 PM

You are not restricted in SS on pin size. If the approved rod has a larger small end than you would like, re-bush the rod to your specifications. Note you may also use rod and crank spacer bearings in SS.

12-03-2007, 11:21 PM	#1
Chuck Norton Member Join Date: Dec 2001 Location: Covina, CA Posts: 474 Likes: 114 Liked 89 Times in 19 Posts	Re: Recommendations for mopar 383 ss 1. Use the pin dimension as listed on the NHRA sheet. Whatever it says is the operative spec. 2. Use the compression height for your application as listed. 3. Use the combustion chamber volume spec as listed. Don't factor in valve notches. It is what it is. Div 5's information on deck height is the way it was a few years ago. The current rule allows moving the piston/deck height to accommodate the available gasket. If you have to push the piston out of the hole a few thousandths to make up for the fact that the only gasket available is too thick, it will pass.

12-04-2007, 01:53 AM	#2
Paul Precht Senior Member Join Date: Dec 2001 Location: Elysburg, Pa Posts: 733 Likes: 363 Liked 327 Times in 121 Posts	Re: Recommendations for mopar 383 ss 79.5 cc is the min for 69.The AVS flows about 630 CFM Give me a call if you need more info, 570 735 3895 Eves EST, Paul.

12-04-2007, 02:25 AM	#3
bsa633 Banned Join Date: Mar 2002 Posts: 310 Likes: 0 Liked 0 Times in 0 Posts	Re: Recommendations for mopar 383 ss any pin is ok in SS and the .990 pin is the most common in use but there seem not to be any legal aftermarket rod ava. with that pin bore,but you can ofcourse bush the oem rod,not sure how they feel about bushing down an aftermarket rod that has the specs shown already? have you seen the other thread that should be interesting for you? http://classracer.com/classforum/showthread.php?t=8181 Last edited by bsa633; 12-04-2007 at 02:28 AM.

12-06-2007, 01:02 PM	#4
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Recommendations for mopar 383 ss You are not restricted in SS on pin size. If the approved rod has a larger small end than you would like, re-bush the rod to your specifications. Note you may also use rod and crank spacer bearings in SS. __________________ Jeff Lee 7494 D/S '70 AMX