7.3 Crossover pipe/manifold modification?
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7.3 Crossover pipe/manifold modification?
So the 7.3 IDI has a crossover pipe from driver's side manifold that dips all the way down around the oil pan before meeting with the passenger side manifold and into the turbine housing. Now I was looking at the 7.3 and 6.0 powerstroke with up pipes that join into a Y pipe before the turbine housing and was wondering why the IDI doesn't use a similar design. If the manifolds were "flipped" or modified to exit exhaust upwards and join together pre turbine housing, it would eliminate the extra piping and keep heat in better. Obviously I'm not the first who has looked at this and wondered why, so I'd like to know why it isn't being done? If the issue is the firewall, can it not be modified?
I'm still quite new to diesels and I may not totally grasp the concept. It seems this issue would be addressed by now with all the folks modifying their IDIs. The manifolds would need to be slightly modified and up pipes fabbed but it doesn't seem like a huge project?
Fill me in
I'm still quite new to diesels and I may not totally grasp the concept. It seems this issue would be addressed by now with all the folks modifying their IDIs. The manifolds would need to be slightly modified and up pipes fabbed but it doesn't seem like a huge project?
Fill me in
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yes it will work better, the turbos on the market are a retrofit kit, you install with the engine in the truck. those style up pipes will not work like that. idi performance sells pipes that work like that but if you have the stock style stuff jjust heat wrap it ans youll be fine unless your building a high hp motor (4-500+)
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Several people have done it but as you said, the firewall is an issue. The best way to do it is to just get rid of the factory manifolds and fabricate your own. Nmb2 did it in his idi but iirc he had to move his engine forward like an inch. This is fine with an obs truck, but if you have a 80-86 truck like mine, moving the engine forward is damn near impossible if you have an intercooler and a/c condenser up front. So yes it can be done, it just takes a decent amount of fab work
I don't know if it's worth the time and work but I have been thinking about building powerstroke style up-pipes for my 6.9. I just haven't found a way to make room yet
I don't know if it's worth the time and work but I have been thinking about building powerstroke style up-pipes for my 6.9. I just haven't found a way to make room yet
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Bottom line, easy. To do a divided up-pipe setup, it would cost more to make, more time, more time to install, therefor more money, all on an engine most deemed hardly worth it. It got the job done and was cheapest / easiest. The hypermax turbo actually is divided, but does a **** poor job of doing it.
Like beast said, Justin is building divided up-pipes for them, 7.3 psd style from what i understand. I pretty much assumed they have to fit one way or another because: the early banks, the up pipe is on the drivers side of tranny and DP is on the right. On the later model turbos, the up-pipe AND DP are on the right. This tells me there is room for an up-pipe on the left and room for up pipe and DP on the right. Im positive that this will require custom manifolds, but there in lies another little bonus. There is imo room to build some shorty header style manifolds which will help cut down on reversion and increase scavenging even more (the whole point of a divided / twin scroll setup). Its one of those things ive considered before, but imo not worth the time and effort for just my truck. However someone in justins position... once the first one was done, they would be easy to replicate, comparitively speaking.
Like beast said, Justin is building divided up-pipes for them, 7.3 psd style from what i understand. I pretty much assumed they have to fit one way or another because: the early banks, the up pipe is on the drivers side of tranny and DP is on the right. On the later model turbos, the up-pipe AND DP are on the right. This tells me there is room for an up-pipe on the left and room for up pipe and DP on the right. Im positive that this will require custom manifolds, but there in lies another little bonus. There is imo room to build some shorty header style manifolds which will help cut down on reversion and increase scavenging even more (the whole point of a divided / twin scroll setup). Its one of those things ive considered before, but imo not worth the time and effort for just my truck. However someone in justins position... once the first one was done, they would be easy to replicate, comparitively speaking.
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From: Maple Valley, WA
I have been working on it. It would require new manifolds, but ive crawled up there, and I think a small up-pipe (1.75") would clear on the drivers side. We don't have the clearance a PSD has on the accessory mounts, so it is tighter. I have a good Idea how to implement it, I just need to get caught up so I can build a prototype.
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Thanks for the replies. I understand that it isn't worth the trouble unless you're building something high HP or you have the engine pulled and it's easy to work on. I didn't know Justin was doing exhaust manifolds and up pipes also. It's really great what he's doing. Seeing as I live in BC, I may have to take a trip to see him in Washington shortly. I'd ultimately like to get my engine rebuilt and chase 400-450HP with R&D goodies and a little custom fab work. Nothing is concrete until the engine gets pulled though.
Thanks guys
Thanks guys
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I have been working on it. It would require new manifolds, but ive crawled up there, and I think a small up-pipe (1.75") would clear on the drivers side. We don't have the clearance a PSD has on the accessory mounts, so it is tighter. I have a good Idea how to implement it, I just need to get caught up so I can build a prototype.
Since you're knowledgable with these engines, round about what would it cost me for the bottom end to be rebuilt, cylinders honed, pistons cut, heads P&P, inspected for cracks and everything else that goes with it. My truck has 350xxxkm on her and would probably need a good going over.
Build would be full out: R&D cam, intake mani, RD4 180 (or the biggest you have when time comes) studs, Moose injectors, possibly your up pipes and exhaust manifolds if they make production, a big turbo (64 or 66mm) intercooler... the whole nine yards. I know it's going to cost a pretty penny for all the R&D goodies so I'd like to know where I'll stand for rebuilding the engine before hand.
Thanks a lot
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