What ring gap for this crazyness?
01-22-2005, 10:56 PM
#1
9 Second Club
Thread Starter
Join Date: Jul 2003
Posts: 1,195
Likes: 0
Received 0 Likes
on
0 Posts
What ring gap for this crazyness? Iron 408
Lunati billet crank and rods
Diamond Nitrous Pistons (12cc dome with valve releifs and gas ports)
Hellfire rings
Solid roller cam (265/278 625/631 112)
CNCed heads (59cc chamber)
cometic head gasket (.074in thinkness) Should put it abit over 15:1 CR
400 worth of bottle on top of it. LOL
Lots of race gas
I have sent various people emails on this and wanting to know some other peoples thoughts on this. I will be doing the ring gap myself and was wondering what I need to set them at.
Lunati billet crank and rods
Diamond Nitrous Pistons (12cc dome with valve releifs and gas ports)
Hellfire rings
Solid roller cam (265/278 625/631 112)
CNCed heads (59cc chamber)
cometic head gasket (.074in thinkness) Should put it abit over 15:1 CR
400 worth of bottle on top of it. LOL
Lots of race gas
I have sent various people emails on this and wanting to know some other peoples thoughts on this. I will be doing the ring gap myself and was wondering what I need to set them at.
01-22-2005, 11:20 PM
#2
TECH Junkie
Join Date: Aug 2002
Location: Fort Collins, CO
Posts: 3,726
Likes: 0
Received 0 Likes
on
0 Posts
Big. Haha.
That's a unique setup but if I had to answer I'd probably say about .024 on the top. Bigger probably wouldn't hurt you though. There are some variables here, however.There's a lot of debate about the second ring. .026 is probably the minimum gap for the second ring. Keep in mind that whatever gas gets past the top ring DEFINATELY needs to get past the second ring.
Consult your engine builder though.
That's a unique setup but if I had to answer I'd probably say about .024 on the top. Bigger probably wouldn't hurt you though. There are some variables here, however.There's a lot of debate about the second ring. .026 is probably the minimum gap for the second ring. Keep in mind that whatever gas gets past the top ring DEFINATELY needs to get past the second ring.
Consult your engine builder though.
01-23-2005, 03:02 PM
#5
TECH Fanatic
iTrader: (1)
Join Date: Nov 2002
Location: Venice, Ca
Posts: 1,829
Likes: 0
Received 0 Likes
on
0 Posts
I get 14.45-1 with a 4.100 bore gasket. The piston manufactuer gives you a multiplier to set the rings up for heavy nitrous or FI. Sounds like it will be a beast.
01-23-2005, 04:23 PM
#6
TECH Junkie
Join Date: Aug 2002
Location: Fort Collins, CO
Posts: 3,726
Likes: 0
Received 0 Likes
on
0 Posts
Most people use .004" per inch of bore for an N/A application and .006" per inch of bore on a nitrous application.
On a BIG nitrous application we've gone all the way to .008" per inch of bore. That was on a serious nitrous motor that saw lots of freshens and a plethora of new parts per freshen. She ran good though.
On a BIG nitrous application we've gone all the way to .008" per inch of bore. That was on a serious nitrous motor that saw lots of freshens and a plethora of new parts per freshen. She ran good though.
01-23-2005, 04:24 PM
#7
9 Second Club
Thread Starter
Join Date: Jul 2003
Posts: 1,195
Likes: 0
Received 0 Likes
on
0 Posts
Yes I do have a ring sheet to tell me this, but I was just wondering if anyone had some different thoughts on this. I know alot of engine builders don't go by the ring specs in the box.......and yes it should be a beast. Shooting for 525+ on motor through a PG and a 9in on slicks.
Trending Topics
01-23-2005, 04:29 PM
#8
TECH Junkie
Join Date: Aug 2002
Location: Fort Collins, CO
Posts: 3,726
Likes: 0
Received 0 Likes
on
0 Posts
It's pretty much the standard. A lot of nitrous motors have special hone jobs to help with ring seal. And I see you've already got the good Hellfire rings. All that's left is choosing an engine builder that's experienced with big nitrous motors.
01-24-2005, 07:19 PM
#9
9 Second Club
Thread Starter
Join Date: Jul 2003
Posts: 1,195
Likes: 0
Received 0 Likes
on
0 Posts
I have built my motor and many other LS1's. I consider myself a good engine builder but there are some differences for a nitrous motor. That was why the ? about the gap. Every other thing is pretty standard to install.
