Piston Ring Gap Questions
ET,
I used .030 top and .034 second on my 4.060 bore x 3.48 stroke gen 1. It was fuel injected with a dry nitrous system, with 8 .036-.042 jets depending on speed needed. Best ET @ 3100# was 8.25@ 165.
Kurt
I used .030 top and .034 second on my 4.060 bore x 3.48 stroke gen 1. It was fuel injected with a dry nitrous system, with 8 .036-.042 jets depending on speed needed. Best ET @ 3100# was 8.25@ 165.
Kurt
Originally Posted by etperformance
This is definetly a race only application. I do appreciate the input. That is what makes LS1Tech so great.
Anyone else have suggestions on gap numbers, for nitrous applications?
Thanks to all
Anyone else have suggestions on gap numbers, for nitrous applications?
Thanks to all
[QUOTE=etperformance]This is definetly a race only application.
With this statement, I assumed this was a track only car? Is it? If it is then what RPM do you leave at, what do you shift at, what do you come through the lights at? If it is a street driven car at all, I would use the spec's the ring mfg has given. Good input can also be obtained from the piston mfg.
Chris
With this statement, I assumed this was a track only car? Is it? If it is then what RPM do you leave at, what do you shift at, what do you come through the lights at? If it is a street driven car at all, I would use the spec's the ring mfg has given. Good input can also be obtained from the piston mfg.
Chris
Thread Starter
On The Tree
Joined: Sep 2002
Posts: 105
Likes: 0
From: Texas
I leave at about 3500 RPM (3800 Stall), the current cam makes poer at about 4000-to rev limit(65-6600). Its an A4, and currently shifts right before rev limiter. And yes, it is trailered everywhere. As to what RPM's I was going through the lights, I have never paid attention. I do know that I am going a little larger on my split duration cam. My current cam is a
232/236 .598/601 on 114 XE-R advance. The power is for sure mid-high RPM range.
232/236 .598/601 on 114 XE-R advance. The power is for sure mid-high RPM range.
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Brett Foote Multiply .0075 by your bore size for the top ring with N20. I then add .003-.004 to the second.
If your bore was 3.9 I would use .029 on top and .032 on second.
Kurt
If your bore was 3.9 I would use .029 on top and .032 on second.
Kurt
Originally Posted by etperformance
Ok, looks like I am going with recommendations of tighter gap on top, anyone want to tell me the gap size for the top, so that I can determine the second?
TECH Resident
Joined: Sep 2003
Posts: 848
Likes: 1
From: Working in the shop 24/7
Originally Posted by 427
Multiply .0075 by your bore size for the top ring with N20. I then add .003-.004 to the second.
If your bore was 3.9 I would use .029 on top and .032 on second.
Kurt
If your bore was 3.9 I would use .029 on top and .032 on second.
Kurt
Ed
