7.3 idi with 088 ats kit boost problems

[Skidtech]

Hey guys I have this f350 used to have a 460 but we did a 7.3 idi swap and installed an ats 088 turbo kit on it we got cheap. This is a pretty heavy pickup stock with a custom flat bed it weighs about 8600lbs empty. The problem is that the best boost I have gotten out of it has been 6psi and that was climbing a 7% grade on flat ground I'm only getting 3 or 4 psi. I know these turbo are kinda weak anyway but I'm thinking it should at least put out 8 or 9. I considered getting a different t4 cartridge and installing the ats housings on it but not sure if the housings are why it doesnt want to boost. Anyone with insight to how I can make this turbo set up boost better it would be appreciated.

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[genscripter]

how many flats did you turn up the IP fuel screw?

 

[Skidtech]

We tried 2 but it was smoking way too much and didn't make much difference in boost so we backed it off one flat

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[Thewespaul]

Look around every exhaust connection for soot, that will point you to an exhaust leak which most likely is your issue.

 

[Skidtech]

I thought that but I didn't find any soot so I got my stethoscope out and listened for exhaust and intake leaks and could find none.

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[Thewespaul]

Is the turbo spinning when idling?

 

[Skidtech]

Ya and it spins easily by hand.

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[Thewespaul]

those non gated turbos will be pretty smokey if you nail it down low, what are your egts?

 

[Skidtech]

I considered that there may be excessive carbon build up in the turbine housing but I havent taken it apart to see. It has a pretty large housing on it though so I don't see how carbon could build up that badly.

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[Skidtech]

The egts are higher than I would like. Pulling the hill with the turbo at 6 psi I was running around 1100.

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[Thewespaul]

Have you timed the truck? You may be running too retarded to get that kind of egts with so little fuel adjustment

 

[Skidtech]

I timed it to 8 deg advanced.

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[Thewespaul]

thats where I like turbo idis to be timed at, so thats not the issue... What kind of intake setup do you have?

 

[Skidtech]

Its just the stock intake with the obvious add ons for the turbo.

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[genscripter]

How good is the seal between your intake hat and intake? When my seal wasn't tight, I had a boost leak and higher EGT's. Look around the intake neck for any oily residue that could clue you in on a potential boost leak.