I have a 99 suburban that has a GMPP HT383E in it with 0411 PCM swap. I'm trying to start dialing it in. it currently has a stock 02 express van tune on it.
first off, i'm curious of the flowrate of the stock injectors. i don't know if it makes a difference, but i installed the GM replacement MPFI injector spider. i have to measure my fuel rail pressure, but i was hoping to find out the rated flowrate at what pressure so i can adjust the actual flowrate based on my fuel pressure.
also is there a way to adjust the fuel pressure regulator on these to raise it a little so i dont have run more than 80% DC.
The HT383E is rated for like 320hp and 444TQ. i know that is probably at the crank under optimal conditions but i'd like to get as close to that as possible.
The truck has a K&N air filter with the stock intake, stock manifolds to 2" downpipes into 2.5" y-pipe and 2.5" straight pipe with the first O2 sensors in basically stock locations and sensor 2's deleted as there is no need to monitor catalyst performance as the cats are deleted. i built a homemade baffle design muffler that is currently installed to quiet it down for the drive moving across the country, but i will probably straight pipe it unless that sounds too terrible. it also has MSD 6AL ignition box with HVCII coil. I don't want to add too much more hardware right now.
I'm just trying set it up as accurately as possible for now with the current configuration. Also I am using HP Tuner. So far all I know about tuning is what is covered in Greg Banish's books and the basic physics knowledge I have.
any help/advice/information would be greatly appreciated.
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