MBN Problems....

I am a little undecided on the manifold swap thing.
Yes it lowers EGTs at the probe on the cool side of the turbo,
But is thats because the exhaust gas has room to move and cools before it hits the pyro probe but the temps are the same in the cylinder????
Or the EGTs are cooler because the gas is out of the cylinder quicker?????

 

Sleepless Nights had a 70 pin 6nz ecm that he offered to me. Don't remember the price, but it was pretty reasonable; I think he's also from around your neck of the woods. Might try looking him up.

 

Have you checked out Dave's diesel in edmonton? they were selling ecm's for 6NZ.

 

With bigger manifold you will lose boost and that actually raises the in-cylinder temperatures. And the gases are out of the cylinder slower not quicker.

I know someone will say against but I can only say read the books! Some books: Fundamentals of Turbocharging by Nicholas C. Baines and Internal Combustion Engine Gasexchange and Boosting by BoostBusters.

 

I heard of a guy that put 59s in a 625 Acert with PP box. I like that idea,putting 6nz ecm on a BXS.Your not worried about the higher compression due to the IVA's not working? Should be ok,I think.

 

The bxs has 18:1 comparied to 16:1 of the 6nz but I am not cranking the hp on this on, I am leaving the injectors stock and am going to flash to a 475 1750 fille. Will see have to see how it goes. The bxs gets poor fuel mileage, 4.1 canadian, the customer is looking to improve. I would like to just flash the ecm, but the ecm is locked out, will not allow the flash to even start, incorrect flash file error. I have a couple of used 70 pin ecms, so I will use one of them.

Update: I checked sis and some 6nz have 18:1 and some have 16:1, will have to check the ot specs in TMI to identify difference.

 

I agree with you,I think you'll see a fuel mileage improvement.Be careful though,I'm not sure how the Acert injectors work with injector codes.Had a BXS flashed to 2421860 file(check it out sometime,it has codes instead of trim files) and twice when the customer started it cold,it ran WOT until he shut er down.Probably not the injector codes,though.

 

I agree, on a stock turbo but not with the size of my turbo. I dont seem to be losing any boost. This manifold is a common upgrade for us here, without it you will cook the motor with my set up as its been done before.

You are dropping backpressure, the motor is breathing a lot better, i dont see the problem here.

Ill say it again, what works in your race trucks wont work on a road truck running the mountains.

 

If I understand right you didn't test that turbo with stock manifold, so how do you know you didn't lose boost?

The motor is not breathing better if you lose exhaust velocity. Everytime the gases expand when coming into big manifold and then contract going to exhaust housing they lose energy what could be used to spinning the turbo faster.

I dont see much difference between race trucks and on the road trucks. Race engines must have faster spooling turbo what means smaller exhaust housing and lost top end power. Pulling engines can use big housings like on the road trucks because they get more loading on their engines. If we dont blow our engines on 15-20 second sled pulls but you blow your engines on 10 second dyno pulls so how dont you blow them on long hills?

I earn my money driving truck all over the Europe so I know what it's like. We also have heavier weights and harder mountains than you over there.