I put a HPOP gauge on my truck today.

[907DAVE]

Awesome!

Glad to hear it's up and working for you.

[hayjayhorses]

what should a 17* HPOP max out at (pressure), I am also thinking I may need more then 90cc of fuel.

[907DAVE]

All depends on tuning, and injector type/ size.

But with stock programming all you are going to see is 2800psi.

[hayjayhorses]

thats what it's doing.
If I was to crank it up with tuning, high high can it safely go?

Will bumping the HPOP pressure do much for power or economy?

I want to do all I can to squezz out all mpg i can.

[907DAVE]

Originally Posted by hayjayhorses

thats what it's doing.
If I was to crank it up with tuning, high high can it safely go?

Seems like most tuners are raising it up to 3000-3200. After that you run the risk of floating poppet valves.

Will bumping the HPOP pressure do much for power or economy?

Both actually, increasing ICP also increases MPG's because of the higher atomization and slightly increased timing, same goes for HP's. But there can be a limit as the HPOP's can only support so much.

I want to do all I can to squezz out all mpg i can.

See blue.

Do you have a chip on order?

[hayjayhorses]

I sent Bill a message last week, (he has not responded yet, but thats OK I don't have the cash rite now) about getting an FU package and 3 chips, I want to chip a '99F350, '99 F450, and '00 F550 all with auto. I am told they are the same definition file.

Are the FU tunes, PCM specific or Definition File specific? Can I run one FU package (with additinal) chips on these 3 trucks (same definition file)?

[907DAVE]

Originally Posted by hayjayhorses

Are the FU tunes, PCM specific or Definition File specific? Can I run one FU package (with additinal) chips on these 3 trucks (same definition file)?

As long as all the trucks are in the same PCM family then you are good to go.

[hayjayhorses]

i was thinking it would be nice to run able to run the HPOP at max psi from 1800rpm and up, at like 75% throttle so it wouldn't down shift.

The trucks with 3.73 cruise nice at 1800ish R's down the highway.

wouldn't the mpg go up with 3000-3200 HPOP psi at 1800-2000rpm cruising rpms?

I had a 10k ohm mod on a '95 PS that gave me like 1-2 mpg gain.

will the rough idle (due to the single shots) hurt anything?

[907DAVE]

Originally Posted by hayjayhorses

wouldn't the mpg go up with 3000-3200 HPOP psi at 1800-2000rpm cruising rpms?

Maybe, but you will kill your HPOP in short order!

will the rough idle (due to the single shots) hurt anything?

Doubt it, as long as you dont let it idle for extended periods. You really need to get a chip for that thing, you will be much happier!

See Blue