Get a stock bin and start from there.
Type: Posts; User: matt5112
Get a stock bin and start from there.
1) You should monitor fuel pressure then insert what your injectors actually flow.
You should have 50.5 PSI of fuel pressure at 0 MAP, subtract 1 PSI for every PSI of manifold vacuum and add one...
1 IFR is Injector Flow Rate. If anything, your injectors will flow less in boost, not more. They should always flow the same though.
2 PCM doesn't look for 14.7. It looks to jump across the switch...
You appear to be running boost with 22 lb injectors.
Fuel trims are very negative.
IDC in one log is 110%.
Your air or fuel is way off, sort that out first.
Why does the IFR spike up just before boost?
Why is stoich 15.3?
Why is there no PE add vs TPS?
Why is there no PE add vs time?
Why is torque management on shifts removed as well as the...
Why would you do that?
He's probably seeing 68 PSI with 10 PSI of boost if his stock FPR is working correctly.
http://shop.zzperformance.com/store/p/146-33-GM-Injectors.aspx
Note a stock 1997 value uses a value of 38.26 which suggests GM calibrated that vehicle for an average effective fuel pressure of...
Is that really all your FPR is set to?
In the W body its set to maintain 58 PSI across the injectors under all conditions.
Try a larger pulley?
Whats wrong with running the stock PCM/ECM?
Does it rely on MAF or a combination of MAF and MAP for fueling?
As long as you have a rewire, that IFR table would be fine at that FP.
Unsure on setting FPR method.
Ideally you'd get the proper offsets for your injectors. It'll make tuning easier.
Define bigger TB.
Without knowing that, we can't suggest a maf calibration.
Changing the cross section of the point where the MAF sits is what would most greatly affect your maf readings, not...
Source:
page 16
http://books.google.ca/books?id=Mr-93vKGa-cC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
adjustable FPR or stock?
If stock, you need to find out what they flow at 3.5 bar (or use HPT's calculator), then insert that for your IFR table.
Look around to see if the injectors have been...
Ryan, that tuning method doesn't include the STFT's.
I would suggest this method instead:
http://www.hptuners.com/forum/showpost.php?p=61064&postcount=1
IFR should be set at what they're rated to flow.
Check rail pressure and use HPT's calc to find values to use.
Info on offset data as well as links to other threads on these injectors:...
Given his licensing information was associated with it, no it wasn't.
Not a problem at all.
Cheers
Thanks for the clarification.
I was not aware licensing information was associated with the software with that version of HPT.
The detail that licensing information was indeed associated...
From some source I couldn't verify, 15.4 was supposed to be maximum fuel economy.
Your licensing is associated with the key that is generated by HPT, not the software.
HPT doesn't allow access to much of the 3800 PCM.
And they rightfully have no interest in spending the time...
The correct thing to do would be to find out your actual AFR.
Fuel > Timing > Boost.
Aim for 11.3 actual AFR.
If your maf is accurate, and the fuel settings are accurate, then your PE...
Car seems to run great.
Thanks again.
I picked them up used for a fair price back in the day.
My other question to passingpower is: Offset vs PW vs MAP.
You mentioned elsewhere you didn't use it on your manifold/boost referenced...
Having read a bit last night, I would have never purchased these injectors knowing what I know now.
Numbers are very similar to what I had.
Thanks for your help.
Will see how this goes.