383 Second ring end gap with hyperteutic pistons
Thread Starter
Drifting
Joined: Jul 2005
Posts: 1,623
Likes: 29
From: The Netherlands
383 Second ring end gap with hyperteutic pistons
Hi 
I have a 383 (4.030" bore) in progress with 5cc KB hypers. Top ring end gap should be 0.026" as per instructions.
Now, should I also follow the instructions for the second ring gap? It states 0.004" per inch of bore, which would make end gap for the second rings 0.016". Common practice seems to be a larger second ring end gap to reduce top ring flutter or lifting.
So... What do you guys thinks I should set the second ring gap at?
I asked my machine shop and UEM, but looking for opinions
Both haven't responed yet, by the way (one week) 
I have a 383 (4.030" bore) in progress with 5cc KB hypers. Top ring end gap should be 0.026" as per instructions.
Now, should I also follow the instructions for the second ring gap? It states 0.004" per inch of bore, which would make end gap for the second rings 0.016". Common practice seems to be a larger second ring end gap to reduce top ring flutter or lifting.
So... What do you guys thinks I should set the second ring gap at?
I asked my machine shop and UEM, but looking for opinions
Both haven't responed yet, by the way (one week)
Melting Slicks
Joined: Oct 2005
Posts: 2,056
Likes: 8
From: Redruth Cornwall
After reading some of the horror stories and pics with hypers gone bad I would do exactly as the manufacturer says.
From what I have read and seen on the forum, wrong gaps on hypers can give major breakdowns.
I would go for manufacturers specs. If in doubt, call or email them to be sure.
From what I have read and seen on the forum, wrong gaps on hypers can give major breakdowns.
I would go for manufacturers specs. If in doubt, call or email them to be sure.
Burning Brakes
Joined: Feb 2009
Posts: 780
Likes: 1
From: Shelby NC
Replace all with forged pistons and scat rods--hope this headache is over--Good luck Worship79 for sure--
Last edited by RIO68; Nov 25, 2010 at 12:35 PM. Reason: errors
Burning Brakes
Joined: Aug 2006
Posts: 1,058
Likes: 27
From: Eastern North Carolina
I believe their web site states the top ring gap should be 40% larger then the manufactures recommendations. There is also a program that will determine the ring gap for you....Tim
