Cracked Exh manifolds: where r u?

[MP3racer]

OK, so I am told that some MSP owners are having trouble with the Calloway exhaust manifold cracking. I am looking into building a bracket to fix the problem. However, I would like to see where the manifolds are cracking and if they are all in similar spots. Please post pics of your cracked manifolds and give as much detail as to mods, mileage on manifold, etc.

Thanks!
Tom(burnout)

 

[210_ZOOM]

subn/bumpn for more info. Hopefully by the time this happens to me there will be a fix out there for it.

 

[ZenProtege]

I have a crack between every runner in my manifold in the gaps where the runners meet at the collector. The crotch for cyl. 2 and 3 has the worst crack of all. It is definately allowing exhaust gasses to escape....... The other two crotches have minor cracks that are very thin but I imagine they will become as bad as 2 and 3's.

 

[122 Vega]

Mine alsoo has a crack between #2 and #3 runners coming from the back side of the main runner. It isn't open yet, but will be eventually. I found the crack at 38,000 miles when I put my S/J pipe on, so I don't think that the weight of the turbo system caused it. I still had the factory bracket on at the time.

Britt

 

[MP3racer]

Mine alsoo has a crack between #2 and #3 runners coming from the back side of the main runner. It isn't open yet, but will be eventually. I found the crack at 38,000 miles when I put my S/J pipe on, so I don't think that the weight of the turbo system caused it. I still had the factory bracket on at the time.

Britt

Thanks to both replies!

Can either of you email or post pics??

 

[msp35]

What makes you think a bracket will solve a cracking exhaust manifold?
I don't think there is any movement transferred to the manifold, it's just a p.o.s. design on mazda's part, much like the LSD, Weak ass Rods, and putting in a bad head unit.

 

[MP3racer]

What makes you think a bracket will solve a cracking exhaust manifold?
I don't think there is any movement transferred to the manifold, it's just a p.o.s. design on mazda's part, much like the LSD, Weak ass Rods, and putting in a bad head unit.

I am not under the impression that a bracket will solve the problem....

I would like to investigate this further to determine the cause and then find a solution.

I agree, many of the parts on the MSP wanted for greater durability. However, the turbo system was developed and designed by Calloway. I have worked with them and know them to build proper parts. That is why I think a solution can be found....

Fire away with your thoughts, concerns, pics of cracked manifolds, etc.
I want to look into this futher.....

 

[atticus1398]

Crotch on runner 1

 

[II-Savy]

Is there any filler, or high heat cement that can fill a crack like that?

 

[atticus1398]

$20 for a welder to stick weld it

 

[orng1]

I think the manifold cracks form heat build up in the manifold. Just my opinion.

 

[MP3racer]

I think the manifold cracks form heat build up in the manifold. Just my opinion.

Not sure on that one....the race car runs for up to 3 hours at a time consistently in the 4000-7000 RPM range. The exhaust manifold is glowing red. So hot in fact that when we blew a motor the fragments of the block actually dented the underside of the mainfold. Through all this we have not had any cracks yet.

As far as welding the manifold, I'm going to look into it. The manifolds were made out of a special alloy and may require a slightly different technique than usual.

Has anyone else welded one up with good results yet?

 

[MP3racer]

Crotch on runner 1

Was this covered under warranty or are you beyond it?

 

[atticus1398]

past my warranty, but I just welded it for temp. I have a replacement stocker I may slap on till spring when this "stuff" goes in :

 

[Kansei]

*subscribes* I don't have any cracks yet, but I'll have the Callaway manifold on my car within the next couple days as soon as I figure out what do do about a messed up thread in one of the turbo to manifold stud holes

 

[fr0st]

if it ever cracks, are there any aftermarket manifs we can use?

 

[MP3racer]

if it ever cracks, are there any aftermarket manifs we can use?

Not that I know of to date.....

We are currently in discussion with a few manufacturers to see if we can get one in production!!

 

[Earful]

Bump for a reasonably priced replacement tubular OEM manifold for the FS-DE....something like the OBX....

 

[Kansei]

^^ or the much cheaper solution of bracing something or some other preventative measure to keep the stock manifolds intact since they seem to flow well from what I've read.

 

[Maz2001MP]

This is a huge concern of mine. I will be turboing this car soon and I have a MSP manifold to install. I hope I dont come across this problem because I am not in the mood to dump my whole budget into mani repairs...