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Old 06-20-2009, 05:09 PM   #1
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Default warped manifold...too much heat?

Ok so all my studs are screwed-up, turbo flange is warped, and I discovered that my manifold is warped. Is this normal for a track car? AFR is 11.5:1 in boost, spark map has crazy advance...so am I possibly overheating this guy? I'm sending the manifold to BEGi to get all the work done and I'm adding an EGT because apparently I need to. Any thoughts on this?

Its easy to look at the gasket and notice that things are not good:


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Old 06-20-2009, 07:03 PM   #2
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Do you have any way to measure fuel delivery to each cylinder? I'd be worried you're running lean in one and creating a hot spot...

(Unless of course your faulty studs are creating a leak of some sort.)

- L
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Old 06-20-2009, 07:47 PM   #3
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Quote:
Originally Posted by l_bader View Post
Do you have any way to measure fuel delivery to each cylinder? I'd be worried you're running lean in one and creating a hot spot...

(Unless of course your faulty studs are creating a leak of some sort.)

- L
I don't have any way to do that, but I put cleaned injectors in them. Also, look how black that **** is...its definitely not lean. I guess i could put EGT on each cylinder with a bunch of $22 bungs, but that's going to get expensive.

Maybe Corky will chime in. Right now I'm thinking they will recommend surfacing (duh) and cutting bigger reliefs. I don't see how I'm hitting too-high EGT's if AFR is where's its supposed to be. As for spark, I have no less than 22* at the 15psi at 7k rpm...all of my settings are reasonable.

Studs are fine in the head.

Last edited by hustler; 06-20-2009 at 08:00 PM.
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Old 06-20-2009, 07:58 PM   #4
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Now that the bugger has warped. Deck the flange and reinstall.
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Old 06-20-2009, 08:14 PM   #5
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Quote:
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Now that the bugger has warped. Deck the flange and reinstall.
is this typical? will it happen again? Do I have a problem?

Thanks
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Old 06-20-2009, 08:37 PM   #6
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it looks like #1 and #4 never sealed....
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Old 06-20-2009, 09:01 PM   #7
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Are you sure it wasn't warped when you got it?
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Old 06-20-2009, 09:12 PM   #8
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once it's been heat cycled, it shouldn't re-warp. splitime's suggestion is solid.

also did you check the flange nuts or retighten them? were they loose at all?
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Old 06-20-2009, 10:38 PM   #9
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I dunno if this helps, but my greddy manifold is a bitch to get on and off now, I'm fairly certain it's warped. I tend to run on the hot side at the track as well, so I wouldn't be surprised if that's what caused it.
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Old 06-21-2009, 02:37 AM   #10
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Quote:
Originally Posted by JayL View Post
Are you sure it wasn't warped when you got it?
Quote:
Originally Posted by Braineack View Post
it looks like #1 and #4 never sealed....
it did, considering that it spooled 500rpm later after the track running.

Quote:
Originally Posted by y8s View Post
once it's been heat cycled, it shouldn't re-warp.

splitime's suggestion is solid.

also did you check the flange nuts or retighten them? were they loose at all?
nah, the bolts were tight. Splittime's suggestion makes sense...before I get the checkbook out. By checkbook, I mean "check card."
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Old 06-21-2009, 03:24 AM   #11
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So is heat cycling then having to resurface the flange again common practice? Or is this an exception since it was ran hard?
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Old 06-21-2009, 03:37 AM   #12
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Its one of those unknown unknowns I think.
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Old 06-21-2009, 04:01 AM   #13
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Quote:
Originally Posted by Splitime View Post
Now that the bugger has warped. Deck the flange and reinstall.
+ new relief cuts.

Chris
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Old 06-21-2009, 12:30 PM   #14
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my ETD manifold pulled the flange all over the place. I never re-decked it but I did do relief cuts and re-mounted it and it's been pretty solid and not leaky since. But there is only one track event on it...
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Old 06-21-2009, 12:54 PM   #15
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this manifold had relief cuts...now they're touching. Look at the shape of the stud-holes. lol
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Old 06-21-2009, 02:59 PM   #16
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Yup that's what mine did. I have all the suggested relief cuts on my greddy manifold, which is a lot more than yours by the looks of it. They're all touching now. We're kind of asking for it by separating the flange into multiple pieces.
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Old 06-21-2009, 03:33 PM   #17
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my first manifold warped so bad i had to cut it off the head....
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Old 06-21-2009, 03:41 PM   #18
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That sucks. Not seen it before. This is new:


Did you use a new gasket or reuse the old one? Was it clean as new when reused? It may be that the warping came after a small exhaust leak, that heated the outside too much and caused it loosening more and warping more.

Get a new exhaust gasket for sure, and retighten several times after heat cycling. And use your Rebond...
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Old 06-21-2009, 04:29 PM   #19
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I used a new gasket, so I guess I'll buy another. I'm not using the threadlocker there.
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Old 06-21-2009, 04:55 PM   #20
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i was waiting for this to happen! too much ignition advance = more heat = warped ****.
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