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Dec 11, 2004 | 12:56 PM

A DEE O

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Exhaust leakfound

APE tore into my car this week. Both headers were cracked. Now fixed. I will continue to post pics. Nick has been great keeping me in the loop as if I were there. My car is 360miles away.

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Dec 11, 2004 | 01:11 PM

A DEE O

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Here is the repaired passenger manifold. Angelo

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Dec 11, 2004 | 02:45 PM

Black LS1 T/A

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I had a cracked header once. My LTFT's for that side got a lot higher... maybe +10 or so, and my power was down (I think mostly because it threw off my tune).

Dec 11, 2004 | 05:30 PM

A DEE O

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Another pic of cracked 321.

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Dec 12, 2004 | 04:04 PM

Jammer

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Yours are 321? Cas has a few issues with the initial design from my standpoint. 1st, the flanges should be cut into two peices, right down the center basically (front to rear)....{simple to do at anytime} This will allow for some needed expansion room. Also, where the exterior welds are on the flange to the primarys, the welding should have been "stiched" not full welds...Save the full weld for the interior where the flange met the pipe. It appears that once the cracks are repaired on these kits, if you have any, that that does the job. Mine never cracked, but we've seen it on yours and noyzees kit. Corky Bell was pretty specific about these requirements, along with enlarging the log manifold bolt holes in same cases to keep the flanges from expanding and sheering the bolts....the ladder being hard for me to see happening.
BTW A-Dee-O, love that hood.

Last edited by Jammer; Dec 12, 2004 at 04:29 PM.

Dec 13, 2004 | 07:18 AM

Noyzee

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From: East Side Performance! mASShole

My headers cracked alot, they got better as they aged tho. it was like they settled into place.

Dec 13, 2004 | 05:14 PM

XJGPN

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From: Bardonia, NY

Quote:

Originally Posted by Jammer

Also, where the exterior welds are on the flange to the primarys, the welding should have been "stiched" not full welds...Save the full weld for the interior where the flange met the pipe. It appears that once the cracks are repaired on these kits, if you have any, that that does the job.

One of the things that I noticed about the welds on the CAS manifolds (based on pics that I have seen) is that they were clearly not backpurged during welding. I'm wondering how much of an affect that would have on their tendency to crack? Regardless, it is still a log manifold, so I really feel that any of these items we are referring to merely prolong the inevitable...

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Dec 13, 2004 | 06:44 PM

XJGPN

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From: Bardonia, NY

Quote:

Originally Posted by Jammer

Good point Xj with regards to backpurging... didnt notice it on mine however...not like inert gas is pricey!

It was something I noticed in this pic. You can tell from the crud on the inside of the tube where it was welded. If you properly backpurge stainless it will be a mirror image of the weld on the surface.

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