Brains

iTrader: (7)

Cylinder 1:


Cylinder 7:


Cylinder 7 again:


Manifold flange:

V8_DSM_V8again

Yep....

Why I dont like logs.

NA$TY-TA

iTrader: (21)

Tiff's car Brian????

98Ztwentyeight

iTrader: (2)

do shorty headers crack/warp like that too?

Brains

iTrader: (7)

Kyle: yup, Tiff's.. Car was sounding like a clunker (really bad exhaust leak) that really sounded like a manifold gasket leak. Well, a gasket change didn't fix it, so we pulled it off today and found the cracks. I touched up the welds (nice having a tig) and its fine for now.

I'm wondering if this manifold wasn't originally warped -- or if it was warped when it was sent back to repair the first crack (cyl 7 primary, where it meets the log). Either way, the stress of clamping down that 1/8" or so gap definitely seems why it cracked on cyls 1 and 7.. I'm seriously considering rebuilding this manifold out of schedule 40 tubing and elbows

pwrtrip75

iTrader: (8)

you can get schedule 10 stainless elbows at mcmaster.com for real cheap they are on page 11 of their online catalog. thats what i made mine out of. 1 1/2 pipe is close to 1 7/8 tube. and sch 10 is strong enough not to crack and not heavy like sch 40.

StoleIt

iTrader: (3)

Tiff has the QMP/Stainless Work's hot parts right?

frcefed98

iTrader: (16)

pssst truck manifolds, just ditch those things already....and the sch 40 tubing is also cheap and is strong too. Import dudes love turbo manifolds made out of that stuff.
J

Brains

iTrader: (7)

Truck manis are nice, but tough to keep A/C Remember, this is her daily driver in the Texas heat.. We'll see how long this lasts, but I can forsee rebuilding in sched. 10 or 40 being a reality in the somewhat near future.

.. and yes, this is the QMP/SW kit.

NA$TY-TA

iTrader: (21)

damn man that sucks.............. glad u could fix it though.........

frcefed98

iTrader: (16)

DOH! I've been a/c-less for so long I thought it was normal for everyone to not have a/c

Zangel

iTrader: (11)

Although I could live without the AC, I don't think my son could. Besides, it could be pretty miserable in the summer (especially with the Houston humidity). I think I will keep the A/C and eventually get rid of this kit unless something else can be done. I am starting to get really tired of pulling the car apart every couple of months though.

engineermike

Any exhaust manifold runs much hotter than the head it's bolted to and, therefore, thermally expands much more. The log thermally expands axially as much as .100" more than the cylinder head. Log headers inherently don't have very much flexibility built into them.

If you weld them, they will crack again.

There are 2 things you can try:

1. Cut the flange between each cylinder. This will allow the flanges to slide independent of each other and the cylinder head. You'll need a metallic header gasket (not aluminum) like copper or stainless because the flange will be sliding back and forth across it.

2. Cut up the log and install bellows type expansion joints between each cylinder. The Turbo Regals have this feature in the stock log header.

Mike

TTSSZ

iTrader: (8)

Next time you see a used Incon kit come up for sale jump on it.

A DEE O

iTrader: (2)

I dealt with them for 3 years....................
I couldn't agree more.

engineermike

Mine works perfect and so does the Turbo Regal's. You just have to set it up right. It's in the details!

engineermike

http://www.gnttype.org/techarea/pict...stockhdrs.html

Here's a pic of the Turbo Buick log with expansion joints.

Like I said, though, I'd cut the flanges first.

Mike

RealQuick

iTrader: (14)

Try creating a bracket to support the turbo too if that hasnt been done already. I am making a kit right now where there is a drives and pas. log, but the they run independently from eachother (not q.m.p. or tti style). The turbo will be supported by a bracket that bolts to the head...