Weber Set-Up and Tune Discussion - Page 34 - JeepForum.com

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post #496 of 1100 Old 08-08-2012, 01:12 PM Thread Starter
swatson454
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Quote:
Originally Posted by svenster View Post
Twitching to make progress...
Sorry man.

Yes. Compression test, check spark plugs for oil and excess fuel, ect. Triple check your manifold to head gasket for vacuum leaks. Those can be sneaky little critters!


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post #497 of 1100 Old 08-09-2012, 04:04 PM
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compression test done. #1-6. 100/115/115/105/120/110. i used water on the manifold gasket area and found that my idle drops when i pour it on heavy. i tried tightening the bolts and it didn't seem to help a whole lot. weird because the gasket is fairly new because of the recent build. sparks plugs were pretty dark but that would make sense due to running super rich.
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post #498 of 1100 Old 08-09-2012, 04:16 PM
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trying to upload a short video of the vacuum gauge but it won't allow me for some reason
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post #499 of 1100 Old 08-09-2012, 04:51 PM
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Quote:
Originally Posted by svenster
trying to upload a short video of the vacuum gauge but it won't allow me for some reason
Yeah no uploads I know of for videos

Put it o n you tube and imbed the link here.

Like this I think
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post #500 of 1100 Old 08-09-2012, 05:04 PM
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post #501 of 1100 Old 08-09-2012, 05:11 PM
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Quote:
Originally Posted by svenster
compression test done. #1-6. 100/115/115/105/120/110. [b]i used water on the manifold gasket area and found that my idle drops when i pour it on heavy. i tried tightening the bolts and it didn't seem to help a whole lot.[\b] weird because the gasket is fairly new because of the recent build. sparks plugs were pretty dark but that would make sense due to running super rich.
You need to fix this vacuum leak. I got an old BBD that is pulling 20"


Could the bolts you are using too long?
They might bottom out and you would think they are tight. But they are not sealing the manifold.
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post #502 of 1100 Old 08-09-2012, 05:11 PM
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svenster,

15" hg seems low for California. That puppy should pull 18-20 easy at sea level.

I'd still be looking for a leak.

Matt
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post #503 of 1100 Old 08-09-2012, 05:14 PM
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ok. i feel like i should pull off the intake and have it planed. i have the clifford and the weird washer shim set up. planing would get both surface closer to matching and make sure that i have a level plane to work with. sound right? what intake gasket would be the best so that i won't have to remove the manifold again for the umpteenth time?
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post #504 of 1100 Old 08-09-2012, 05:15 PM
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svenster,

15" hg seems low for California. That puppy should pull 18-20 easy at sea level.

I'd still be looking for a leak.

Matt
could my cam have something to do with that being as it is a clifford 264?
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post #505 of 1100 Old 08-09-2012, 05:15 PM
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I use felpro gasket with no problems.
I use a thin layer of axle grease on the gasket so I can reuse it if I have to take it off again. This only works if the surface is even and you did not over torque the gasket.
It does make removing the gasket years later a cinch.

If you get the exhaust manifold done at the same time, you probably don't need a gasket for the exhaust.

If you have money to burn, take the head in also and have guide pins installed for both manifolds.
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post #506 of 1100 Old 08-09-2012, 05:18 PM
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Quote:
Originally Posted by svenster

could my cam have something to do with that being as it is a clifford 264?
It could, how aggressive is that cam? What's the overlap?

A good torquey cam should still give you good vacuum.
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post #507 of 1100 Old 08-09-2012, 05:20 PM
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I use felpro gasket with no problems.

If you get the exhaust manifold done at the same time, you probably don't need a gasket for the exhaust.

If you have money to burn, take the head in also and have guide pins installed for both manifolds.
head has guide pins for the intake, but not exhaust. rather not pull the head again due to the fact that i have the smaller head bolts and aligning the head to the block so that it didnt leak coolant was a real pita.
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post #508 of 1100 Old 08-09-2012, 05:24 PM
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Originally Posted by John Strenk View Post
It could, how aggressive is that cam? What's the overlap?

A good torquey cam should still give you good vacuum.
here it is
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246.jpg  
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post #509 of 1100 Old 08-09-2012, 05:25 PM
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post #510 of 1100 Old 08-09-2012, 05:35 PM
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Quote:
Originally Posted by svenster
here it is
Looks torquey.
If a cam has a lot overlap, the you will get lower vacuum. But You have little overlap but a good lift. Good cam.

Here is factory
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