79 Mustang lean as a bean |
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KooK
Senior Member Joined: February-10-2014 Location: Iowa Status: Offline Points: 143 |
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I threw on some Mr. Gasket carb gaskets, those things are probably 5x thicker. Couldn't get the engine below 1500rpm without stalling. Toss on my paper thin Holley gaskets and the sucker idles at 650 with no problem. Spraying around with starting fluid, no leaks on the Holley gaskets. Weirdest thing because I figured the Holley gaskets were junk compared to Mr. Gasket stuff.
Side note, I can't get below an 18in-mg. I still feel like I have a small intake leak but I can't find the damn thing, I'll look at it again later. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11093 |
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Did you change the gasket under the intake spacer (between spacer and intake)
Sometimes those have a nasty habit of leaking if they're not wide enough. My guess would be that the Holley were big enough and the Mr Gasket aren't big enough to seal right. Look at the underside of the spacer to see what I mean, there's not a lot of sealing area. |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Any idea who makes Mr Gasket brand or vice versa |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11093 |
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Here's a picture of what the bottom of your spacer might look like.
You need just the right gasket to seal it to the manifold, some aren't quite wide enough like I mentioned above. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11093 |
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I know But i'm not telling Kook |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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On PCM's I have never found an aftermarket gasket that would fit between the intake and spacer always had to use the oem ones
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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I be speechless if you didn't
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11093 |
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Sometimes I hack out my own with plenty of overhang or I've also used a 1/8 spacer plate
between the manifold and spacer that gives a lot more sealing area. It made by Mr Holley Gasket |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11093 |
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Looks like this.
Seals much easier against the 1 inch spacer than the intake manifold does and stops that annoying vacuum leak |
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KooK
Senior Member Joined: February-10-2014 Location: Iowa Status: Offline Points: 143 |
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The heck, has Holley always owned Mr. Gasket?
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KooK
Senior Member Joined: February-10-2014 Location: Iowa Status: Offline Points: 143 |
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http://www.blowerdriveservice.com/store/289302-ford-671-manifold-p-843.html
Maybe I should just cut the doghouse and throw on a 6-71 with a bird catcher. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11093 |
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Kook
Where are you? Is that thing tweaked to perfection yet? |
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