warped manifold...too much heat?
#1
Tour de Franzia
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
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:
Its easy to look at the gasket and notice that things are not good:
#3
Tour de Franzia
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
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 07:00 PM.
#9
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,429
Total Cats: 1,207
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.
#10
Tour de Franzia
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
it did, considering that it spooled 500rpm later after the track running.
nah, the bolts were tight. Splittime's suggestion makes sense...before I get the checkbook out. By checkbook, I mean "check card."
nah, the bolts were tight. Splittime's suggestion makes sense...before I get the checkbook out. By checkbook, I mean "check card."
#14
DEI liberal femininity
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 574
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...
#16
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,429
Total Cats: 1,207
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.
#18
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...
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...