turbo manifold....where to get one
04-22-2010, 04:30 PM
#26
It shouldn't - its a pretty good piece.
I just put mine through some pretty extreme situations that most people wont and I need something that won't crack under those conditions.
Functionally, there is not really much to be improved upon in that form factor and with the existing constraints.
I just put mine through some pretty extreme situations that most people wont and I need something that won't crack under those conditions.
Functionally, there is not really much to be improved upon in that form factor and with the existing constraints.
04-23-2010, 11:06 AM
#29
WAH WAH WAH
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It shouldn't - its a pretty good piece.
I just put mine through some pretty extreme situations that most people wont and I need something that won't crack under those conditions.
Functionally, there is not really much to be improved upon in that form factor and with the existing constraints.
I just put mine through some pretty extreme situations that most people wont and I need something that won't crack under those conditions.
Functionally, there is not really much to be improved upon in that form factor and with the existing constraints.
04-23-2010, 02:13 PM
#34
My 8 looks like a Smurf
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It shouldn't - its a pretty good piece.
I just put mine through some pretty extreme situations that most people wont and I need something that won't crack under those conditions.
Functionally, there is not really much to be improved upon in that form factor and with the existing constraints.
I just put mine through some pretty extreme situations that most people wont and I need something that won't crack under those conditions.
Functionally, there is not really much to be improved upon in that form factor and with the existing constraints.
Any thoughts on why so many of them cracked and how one could possibly be built to not have to worry about cracking?
04-23-2010, 02:19 PM
#35
They are made out of cast ductile iron.
If the casting is thick enough, they won't crack.
The problem is there are several very thin parts of the casting and because of the way our exhaust system is constructed, much of the stress of the weight of the exhaust system acts like a lever on the manifold (despite the brace on the midpipe, which acts more like a fulcrum than a brace).
I alleviated this in my setup with a flex-bellows on my midpipe, but a change in the way the flow is directed in the manifold and a thickening of the casting at the places where the flow direction changes would probably do the trick.
When I weld mine, I plate over the crack instead of just welding the crack itself.
Then, later, a new spot cracks and I plate over that. My manifold is now almost completely plated with stainless!
If the casting is thick enough, they won't crack.
The problem is there are several very thin parts of the casting and because of the way our exhaust system is constructed, much of the stress of the weight of the exhaust system acts like a lever on the manifold (despite the brace on the midpipe, which acts more like a fulcrum than a brace).
I alleviated this in my setup with a flex-bellows on my midpipe, but a change in the way the flow is directed in the manifold and a thickening of the casting at the places where the flow direction changes would probably do the trick.
When I weld mine, I plate over the crack instead of just welding the crack itself.
Then, later, a new spot cracks and I plate over that. My manifold is now almost completely plated with stainless!
04-23-2010, 02:30 PM
#36
My 8 looks like a Smurf
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Good call on the flex bellow, I didn't think of that. New BHR midpipe feature? 
We came to the same conclusion of the casting being a tad on the poor side [also that many welders can't repair cast iron properly].
Do you really think it's worth reinforced this part over designing a new manifold without these weak points? Or are you simply thinking of the reinforced manifold as a cost-friendly option for people who already bought the kit?
We came to the same conclusion of the casting being a tad on the poor side [also that many welders can't repair cast iron properly].
Do you really think it's worth reinforced this part over designing a new manifold without these weak points? Or are you simply thinking of the reinforced manifold as a cost-friendly option for people who already bought the kit?
04-23-2010, 02:43 PM
#38
The only thing I'm "keeping" from the GReddy design is the position of the flanges so that one can simply swap in this manifold in their GReddy kit (or their MM upgraded kit) and be done with it.
It sits in exactly the same place but looks/functions totally different.
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