7.3 idi build for my S1654

[Isaac Ristow]

How does it perform with only getting half the thermal energy?

It will have all the exhaust going though the turbo. It will have a crossover pipe between the 2 original manifold outlets just like a 6.5 gm or the turbo engineering Rajay turbo kit in my 7.3 bullnose. With the SAE bell housing and motor mounts in the way in the rear a valley mount turbo is definitely something that would be a pita and require a ton more fab and custom manifolds/headers to get that all done. I'll be wrapping the crossover pipe in header wrap to help keep the heat in it as well as the down pipe to keep under hood temps lower

 

[The_Josh_Bear]

Just because that RayJay turbo is so different and welded right to the header, I wonder if there would be any performance gain if you connected BOTH ends of each header together. So 2 crossover pipes.

I'm sure it wouldn't be much, and only at upper RPMs, but I do wonder.

 

[Isaac Ristow]

Just because that RayJay turbo is so different and welded right to the header, I wonder if there would be any performance gain if you connected BOTH ends of each header together. So 2 crossover pipes.

I'm sure it wouldn't be much, and only at upper RPMs, but I do wonder.

Would have to get creative to do that and allot more cast iron welding since these are factory cast manifolds. I'm sure it probably won't be as efficant as a valley mount with 2 up pipes. Now on the Rajay style kit in my bullnose the turbo flange is near the very front of the drivers exhaust manifold making 7 cylinders cram all the exhaust up to the front of the driver side. On the stuff I built for this international the exhaust already dumped out the front side on the passenger side but the exhaust manifold swooped downwards leaving the bolts on the top side. I used a driver side pickup manifold on the passenger side and the downspout came out in the same spot as the international manifold on the front end and the turbo flange is mounted allot closer to that so its in-between 3 exhaust ports on one side and 5 on the other side so its allot better balanced in-between so my thought behind that is it should breathe a little easier.

 

[nelstomlinson]

Isaac, are you going to run the crossover pipe under the front of the engine?

 

[Isaac Ristow]

Isaac, are you going to run the crossover pipe under the front of the engine?

Yes I will be doing that. It will be wrapped in header tape to help retain heat. Driveshaft is in I took it for a spin naturally asperated because it does not have exhaust yet.