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Old 08-10-2010, 11:00 AM
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Best gasket material for intake manifold?

I am running an old Larry Wenzler tunnel ram on my Poncho with dual quads.

The gasket material that separates the lower portion from the top plate is going bad and leaking vacuum.

Can you folks make a recommendation to me on what to use to replace it?


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Old 08-10-2010, 11:06 AM
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a new gasket
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Old 08-10-2010, 11:12 AM
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I would suggest a medium density fiber type, .030-.040" thick. Cork based I think will be too soft.

I would suggest a lot better air filters than those tiny things if you are wanting to make power.
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Old 08-10-2010, 11:28 AM
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If you are having a hard time finding the gasket you may have to buy a roll of gasket material and make your own.
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Old 08-10-2010, 01:21 PM
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I do have to make my own gaskets as noone makes this one. I will go to the parts store looking. I don't know much about air filters but bigger ones won't fit in the scoop.
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Old 08-10-2010, 01:36 PM
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Permatex Ultra Grey.It's the same material GM uses for non-gasket sealing.I have never had a leak with it.Go with 1/4 inch thick bead.
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Old 08-11-2010, 02:36 PM
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Thank you very much.
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Old 08-11-2010, 02:58 PM
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Any silicone in this case is a bad idea, gasoline will turn it to jelly over time, doesn't matter what color or brand.

Do it right, hand cut a new gasket.

K&N filters for the scoop.
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Old 08-11-2010, 03:17 PM
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Quote:
Originally Posted by ericnova72
Any silicone in this case is a bad idea, gasoline will turn it to jelly over time, doesn't matter what color or brand.

Do it right, hand cut a new gasket.

K&N filters for the scoop.
I agree, don't try to shortcut the job, do it right the first time and get a new gasket.
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Old 08-11-2010, 03:33 PM
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All the major parts stores carry FelPro bulk gasket material in any number of thicknesses. Look for Karropak, it will do the job for you. There's also a high temp material called Pro-Ramic.

Doesn't need to be too thick, anything in the 1/16" or less (obviously not "notebook paper" thin) will do, I'd probably choose 1/32" if it was available and the flanges were relatively flat and smooth.
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Old 08-11-2010, 06:32 PM
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NICE motor. Wish it was mine. I could not afford to drive to much though.
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