Re: small block nitrus questions
[Re: w2dak394]
#719448
06/08/10 08:37 PM
06/08/10 08:37 PM
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Joined: Dec 2008
Posts: 1,200
UK
602heavy
pro stock
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pro stock
Joined: Dec 2008
Posts: 1,200
UK
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Ring gaps?...........piston to bore?
Last edited by 602heavy; 06/08/10 08:38 PM.
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Re: small block nitrus questions
[Re: w2dak394]
#719451
06/08/10 10:14 PM
06/08/10 10:14 PM
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Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
cheapstreetdustr
master
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master
Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
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there are three issues as i see them
as you step on it..
first..your combo prolly makes a decent amount of power now..
so be careful when people throw out plate power levels...(added hp numbers)
its total power...that is the threshold..
for instance i know guys who run 250 shot on 300 hp 318..
that is relative to your 450hp 380" motor..
head gasket seal has come up for me a few times.
but crank shaft main cap walk will prolly be
the real factor..
i run about 380 hp engine ive put (.73 no2 pill in it) i think thats 200hp..?
i am not sure id go much past 250hp..with your power level...
fwiw..cheapst..
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured
[image][/image]
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Re: small block nitrus questions
[Re: w2dak394]
#719452
06/09/10 01:51 AM
06/09/10 01:51 AM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Quote:
Its 4.07 bore, dont remember but its what je recomended to me on phone, does .024 sound right. Rings are moly by mahle. Stroke is 3.79. Thanks
Two things wrong right here.....the gaps are too tight, plus you have moly rings. Nitrous and Moly rings don't mix well. I'm sure you will get plenty telling you they sprayed a ton of nitrous a million times on Moly rings and never had an issue. I call BS. It is not a matter of "if" but "when" the moly flakes off the rings, when using nitrous.
Monte
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Re: small block nitrus questions
[Re: Monte_Smith]
#719453
06/09/10 08:36 PM
06/09/10 08:36 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
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Lynchburg, VA
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75HP will run forever properly tuned.
Funny thing they are never properly tuned on the first pass.
Folks have ran 175HP and thought everything was OK and then got a real surprise when they tore the engine down. Cylinder wall scored and moly flaked off rings.
75HP will give you half a second on a 11 second ride. But that is a lot of trouble for half a second when you could properly gap the rings .030" and use a better ring and run 250HP.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: small block nitrus questions
[Re: cbarracuda]
#719455
06/09/10 11:02 PM
06/09/10 11:02 PM
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Joined: Jul 2003
Posts: 977
Colorado
506RR
super stock
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super stock
Joined: Jul 2003
Posts: 977
Colorado
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Quote:
WHAT IS THE BETTER RING
Hellfire rings
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Re: small block nitrus questions
[Re: SLOW67]
#719457
06/10/10 10:43 AM
06/10/10 10:43 AM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Quote:
Aren't hellfire gapless  ?
No. "Hellfire" just refers to the material, not the style ring. ANY ring material can be a gapless ring, if prepared for that. For a nitrous app, you can use stainless, a hellfire, tool steel, or even just a plain cast ring, just not Moly. Any type of ring flutter(common with nitrous improperly tuned) will knock the Moly off, so you don't use a coated ring.
As far as gaps on spray, I run more than most, because I DO NOT want the rings to butt and the motor will never see the extra gap. People put way too much stock in tiny ring gaps. The only way a motor notices the gaps, is if they are just crazy big. I have had the setting get off on my filer and have a hole with a .060 gap. The motor never knows. The only time I spend a lot of time filing rings, is on a class "record" motor. On these, the ring package is so light, it's done in 10 passes anyway and time for a freshen.
Monte
Monte
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Re: small block nitrus questions
[Re: 506RR]
#719459
06/10/10 02:35 PM
06/10/10 02:35 PM
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Joined: Dec 2008
Posts: 1,200
UK
602heavy
pro stock
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pro stock
Joined: Dec 2008
Posts: 1,200
UK
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Quote:
Do yourself a favor and talk to Monte Smith here on the board. He will get you all set up!
You on commission? 
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Re: small block nitrus questions
[Re: 602heavy]
#719460
06/10/10 09:11 PM
06/10/10 09:11 PM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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i have to agree more gap is better. Tight ring gaps murder the ring groove. I wouldn't go .060 on a small block on purpose but like Monte I don't know that you would notice a power decrease. I don't go bigger on the second gap either. I don't go tighter on the second as the little paper tells you. I'm told piston/ring manufacutures tell you to go tighter in case you had an oil control ring problem you would be less likely to pump oil between the upper rings.
Different strokes for different folks but .040" is nothing to be afraid of on a small block. Mine did not but rings on nitrous and made great power NA also.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: small block nitrus questions
[Re: 602heavy]
#719461
06/10/10 09:43 PM
06/10/10 09:43 PM
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Joined: Jul 2003
Posts: 977
Colorado
506RR
super stock
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super stock
Joined: Jul 2003
Posts: 977
Colorado
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Quote:
Quote:
Do yourself a favor and talk to Monte Smith here on the board. He will get you all set up!
You on commission?
Nope! Just a satisfied customer. Didn't know jack about nitrous when i started (still don't know much), but Monte has helped me out a lot.
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Re: small block nitrus questions
[Re: 506RR]
#719462
06/11/10 09:52 AM
06/11/10 09:52 AM
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Joined: Dec 2008
Posts: 1,200
UK
602heavy
pro stock
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pro stock
Joined: Dec 2008
Posts: 1,200
UK
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Quote:
Nope! Just a satisfied customer. Didn't know jack about nitrous when i started (still don't know much), but Monte has helped me out a lot.
I agree  , along with a few other sharp cookies over on the Bullet. 
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