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Old Dec 23, 2008 | 06:09 PM
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Default Head Gaskets For NOS

What head gaskets to use stock motor 150 - 175 shot. I just want to make sure I use the wright ones. How are the fel-pros?
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Old Dec 23, 2008 | 06:47 PM
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Cometic
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Old Dec 29, 2008 | 11:43 AM
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Originally Posted by ATVracr
Cometic
x2
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Old Dec 29, 2008 | 12:18 PM
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yea i have heard good things about cometic gaskets as well.
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Old Dec 29, 2008 | 12:55 PM
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Stock GM MLS gaskets. I am running them on my 383 with a 200 shot.
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Old Dec 29, 2008 | 02:41 PM
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Thanks I went with the Cometic.
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Old Dec 29, 2008 | 05:02 PM
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I guess it's too late but you could have saved some money and went with the GM MLS. They are just as good if not better than Cometics and only cost about $40.00

I use the GM MLS's and I have sprayed well over 300 with no problems. I'm sure your Cometics will work fine though.
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Old Dec 29, 2008 | 08:52 PM
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Cometic
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Old Dec 30, 2008 | 08:51 AM
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Originally Posted by baked
i guess it's too late but you could have saved some money and went with the gm mls. They are just as good if not better than cometics and only cost about $40.00

i use the gm mls's and i have sprayed well over 300 with no problems. I'm sure your cometics will work fine though.
+1....
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Old Dec 30, 2008 | 10:59 AM
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Originally Posted by KH504
What head gaskets to use stock motor 150 - 175 shot. I just want to make sure I use the wright ones. How are the fel-pros?
Stock MLS gaskets is what I use and I've had upwards of 350 on the car before without a gasket problem fwiw.
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Old Dec 30, 2008 | 12:01 PM
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Are there alot of sizes (bore and thickness) to choose from with the stock gaskets?
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Old Dec 30, 2008 | 12:41 PM
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Originally Posted by ATVracr
Are there alot of sizes (bore and thickness) to choose from with the stock gaskets?
Most choose between the LS6 3.9 bore gasket or the 6.0 L truck gasket for a 4.0 bore.
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Old Dec 30, 2008 | 01:01 PM
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Originally Posted by ATVracr
Are there alot of sizes (bore and thickness) to choose from with the stock gaskets?

I don't think they have diff thicknesses to choose from, but they have 3.9 and 4.0 bore and I'm not sure what they use on the ls3/l92, if it's the 4.0 or if they make a 4.060.
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Old Dec 30, 2008 | 01:36 PM
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Cometics here!
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Old Dec 30, 2008 | 01:36 PM
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So do you guys have your motors set up to run a certain thickness gasket?

The flexability to have multiple thickness's and bore sizes is a big advantage.
My motor is not even 4.030 and we use bigger than a 4.060 gasket.

Quench matters if your spraying alot of nitrous.

Last edited by ATVracr; Dec 30, 2008 at 01:42 PM.
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Old Dec 30, 2008 | 01:42 PM
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Originally Posted by ATVracr
So do you guys have your motors set up to run a certain thickness gasket?

The flexability to have multiple thickness's and bore sizes is a big advantage.
My motor is not even 4.030 and we use bigger than a 4.060 gasket.

Quench matters if your spraying alot of nitrous.

how tight is your quench on your motor?
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Old Dec 30, 2008 | 02:07 PM
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Originally Posted by ATVracr
So do you guys have your motors set up to run a certain thickness gasket?

The flexability to have multiple thickness's and bore sizes is a big advantage.
My motor is not even 4.030 and we use bigger than a 4.060 gasket.

Quench matters if your spraying alot of nitrous.
To be honest with you I don't even know what quench is, thought the gasket thickness was just to get a little more or less compression. What is the quench and what are the benefits of more or less? And what is the benefit of the bigger bore gasket on a smaller bore?
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Old Dec 30, 2008 | 02:24 PM
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quench is the distance from the piston to the bottom of the head.

like my motor for example, i run a .040" gasket, my pistons stick out of the hole .007, so my quench is .033".

from my understanding the tighter you can get it the better. it helps prevent detonation. but if you go to tight you have to worry about the piston hitting the head when the piston rocks at tdc
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Old Dec 30, 2008 | 02:28 PM
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My quench is around .065
http://www.yellowbullet.com/forum/sh...d.php?t=100545 ..... Quench thread

And Tony Mamo suggested we use the bigger bore gaskets a few years ago. Not sure exactly why but they have worked great so far as we have not had a failure yet.
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Old Dec 30, 2008 | 02:29 PM
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Originally Posted by JDP

from my understanding the tighter you can get it the better. it helps prevent detonation.
I think you have that backwards.

Shiz had a TIGHT quench and it made ALOT of heat.
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