When I built my 6.9 P'stroke turbo I used G code injecors. I thought they were the ones for a turbo motor. From what I have been reading that was a mistake. Should I replace them with BB code or just run them? Right now I hit 12+ psi before I back out because EGT (post turbo) is hitting 1200. I am moving probe to exhaust manifold (actully putting in second gauge) but have not got it done yet. Should I just put in IC? I can get an early cummins IC for $30 would that be worth it/large enough?

 

I think bb's would raise that egt number? Seems mighty high for 12psi ? I've read g's were more for emissions? Meaning less fuel??

 

I think 1200 is awful high also, especially post turbo. The gauge is an old ISSPro that was in truck when I got it. I had to replace thermocouple to get it working. I am installing another thermocouple in dirver side manifold with an old ISSPro 606 (3") that reads to 1500.

 

Run them. All the IDI injectors are pretty much the same as far as function.

Your EGTs are pretty high for that setup. Check your timing. Different code injectors could change the timing.

 

I would love to check my timing. The diesel mechanics I have talked to don't have the equipment. The fuel injection shop (taylor) doesn't even know of anybody that can do it. Should I look up an international dealer? I am in the St Louis area.

 

I'm surprised that none of your shops have the timing setup. All the IDI & GM 5.7/6.2 engines use the same luminosity setup.

Maybe there's a member local to you that has a meter?

Or try to buy one:
SNAP ON DIESEL TIMING METER MT480 ~ Used | eBay

If you can find someone with the meter, I have an extra probe tip you can borrow. That's small enough to ship around easily, the actual meter is more of a pain.

 

caution.
the meter listed there would be for parts only.
it's missing the lumy probe and mag pickup,rendering the meter useless as is.

 

Yep, missed that, thanks.

The probes you can find off and on. Most of these meters I've seen for sale have the pickup and may or may not have the probe. A probe off a 5.7/6.2 GM will fit the 6.9/7.3 idi motors.