What ring gap for this crazyness?
Thread Starter
9 Second Club
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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.
TECH Junkie
Joined: Aug 2002
Posts: 3,726
Likes: 0
From: Fort Collins, CO
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.
TECH Junkie
Joined: Aug 2002
Posts: 3,726
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From: Fort Collins, CO
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.
Thread Starter
9 Second Club
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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.
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TECH Junkie
Joined: Aug 2002
Posts: 3,726
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From: Fort Collins, CO
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.
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Verdad Gallardo Thread Starter
9 Second Club
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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.
