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Beware of this 4bbl gasket

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Thikstik View Drop Down
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    Posted: Jun/29/2018 at 11:23pm
I have used , since 2007, a Holley thick base gasket on my 258 Gremmy with a Cliffy manifold and a 390 Holley. I chose this gasket as it is 1/4 inch thick which helps insulate carb , and may help low end a tiny bit.  Well, Ive been fooled!!!  It has caused me to chase my tail as carb would go rich at idle, then lean, then rich....
So i put a new one on and guess what?  It was bad within 50 miles doing same thing.  Which is allow vacuum to leak past its cheap laminate design no matter how tight it is.  Sorry, I cant find the PN.  But avoid this thing. It is porous out of the wrapper.    
75 gremlin x, jeep 4L headed 258,Clifford cam, intake,header. 390 holley. I want a 282 VAM motor!

AC/PS/PDB.

72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Thikstik Quote  Post ReplyReply Direct Link To This Post Posted: Jun/30/2018 at 12:36pm
Can say , it is a 4 hole gasket.  Still cant find packaging that i hid so i can give PN.
75 gremlin x, jeep 4L headed 258,Clifford cam, intake,header. 390 holley. I want a 282 VAM motor!

AC/PS/PDB.

72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC.

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billd View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Jun/30/2018 at 4:09pm
Use the phenolic spacer to insulate. Thick gaskets only help in warping carb bases...they are otherwise not worth a lot.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Thikstik Quote  Post ReplyReply Direct Link To This Post Posted: Jul/02/2018 at 10:23am
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i do wonder if any spacing helps tork.  If so, it would be very little im sure at least because were dealing with small motor.  I remember being very surprised on my Pontiac 455.  It gave a seat of the pants improvement.
75 gremlin x, jeep 4L headed 258,Clifford cam, intake,header. 390 holley. I want a 282 VAM motor!

AC/PS/PDB.

72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC.

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Thikstik View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Thikstik Quote  Post ReplyReply Direct Link To This Post Posted: Jul/11/2018 at 11:12pm
Its Holley PN 758.  I bought both several years ago.
75 gremlin x, jeep 4L headed 258,Clifford cam, intake,header. 390 holley. I want a 282 VAM motor!

AC/PS/PDB.

72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote BrotherBamc Quote  Post ReplyReply Direct Link To This Post Posted: Jul/12/2018 at 2:16am
I used to run a big spacer on my 258. The gaskets that I always used and got good results from where the thin ones. I think they were Mr. Gasket... 


73 Gremlin
2006 Dodge Magnum R/T AWD
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