Builds Frog's FJ159 (2 Viewers)
- Thread starter A10Driver
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- cummins 6bt diesel swap fj40
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Build a new manifold that puts the turbo flange closer to the front of the engine.
I agree with Johnny, that's one way to go.
From the picture, it looks like you may have room to run a downpipe with a tight radius and some trimming.
What does the original Turbo downpipe flange look like?
From the picture, it looks like you may have room to run a downpipe with a tight radius and some trimming.
What does the original Turbo downpipe flange look like?
When you build a manifold, you mill it flat after welding. Warping is not a concern, as long as you use plenty of tacks and move around enough. Cracking isn't a concern either, because you're fabricating a new manifold out of steel, but you can always wrap the manifold in a welding blanket after welding to let it cool slowly.
Alternately, a cobra head exhaust elbow would likely fit in that space. Hard to tell without measurements of the room you have though.
Glen's Surplus store: Cummins #3927862 Exhaust PPE Out | Automotive Accessories | Cummins-3927862 |
Alternately, a cobra head exhaust elbow would likely fit in that space. Hard to tell without measurements of the room you have though.
Glen's Surplus store: Cummins #3927862 Exhaust PPE Out | Automotive Accessories | Cummins-3927862 |
A10Driver
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- Thread starter
- #249
I looked at the top mount rv manifolds, turbo would be one inch into the hood. Zoomie option would be cool if I was 20 years younger. I think I am going to build a mini manifold that fits between the exhaust manifold and turbo. This will move turbo forward and down. The Glen's surplus downpipe is also an option that I may end up using
^^^ Look at that, never see this before, very cool!Alternately, a cobra head exhaust elbow would likely fit in that space. Hard to tell without measurements of the room you have though.
Glen's Surplus store: Cummins #3927862 Exhaust PPE Out | Automotive Accessories | Cummins-3927862 |
I don't like the idea of adding a mini manifold between your existing manifold and the turbo. This introduces yet another gasket mating surface for leaks to develop. There can also be a fair amount of stress applied to the turbo housing from the rest of the exhaust as the engine mounts and frame flex, you may be extending the lever arm and adding stress to the manifold/cyl head.
YMMV.
^^^ While it can work, I completely agree with Pacer. A mini manifold is a workaround, not a proper fix.
A10Driver
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- Thread starter
- #253
I hear and agree with both responses, however am going to try it and then decide. If the manifold can take the added stress of compounds then I don't think the extra torque will be an issue. The leaks are a concern, but I am more worried about cooking marshmallows on the passenger firewall for right now.
