75 c10 braf

[ELSimple]

Vehicle: 1975 C10
Engine: 5.3 bore to 3.800 stock crank, gen 4 swingers, mahle power pak pistons, .024 ring gaps, ls7 lifters
Heads: 862's stock ports, 2" intake valves with hand blending, che trunions, stock rockers, Vinci dual ss valve springs, hardened pushrods
Cam: 216/224 .585 115+5A
Intake: Tbss with 92mm tbody
Exhaust: Long tubes, 2.5" tubing with x pipe, fake cats, dyno max ultraflows
Fueling: 450 lph in-tank pump, evil energy e85 fuel filter, racetronix adjustable fpr set to 43.5 base, IN1000's
Power Adder: Torqstorm 75mm unit with grip tec 2.9 and Ati crank dampener
Trans: 4l80e, most of a trans go hd2 kit, Circle D 2500/2700 stall converter, circle D sfi flex plate
Rear: 3.73's, 12 bolt
PCM: p59 2 bar speed density

Initial start up the braf will log 12 g/s at 198*. Turn off and restart, the braf will want less. My Idle affective table probably needs some work. I have verified my truck does not lose power after sitting over night or after sitting all day into the evening. I have thought of just leaving it somewhere in the middle so I dont have in gear issues. Looking for some insights. Maybe I am being too picky.

Also comb through the rest of the tune file maybe I set something goofy.

o2 sensor swapn side to side.hpl initial start up in the morning <--
10 11 o2 v check braf log.hpl
10 11 braf 2 op temp.hpl
10 11 braf 3 op temps closed throttle blade slightly to bring up iac counts.hpl
10 11 braf adj.hpt

TIA

[blindsquirrel]

Engine: 5.3 bore to 3.7800

How much did they charge you for that part?

[ELSimple]

How much did they charge you for that part?

quite a bit actually. I did edit the correction to 3.800.

[blindsquirrel]

lol, I mean... you just never know these days.

[ELSimple]

heard that

[SiriusC1024]

It's because you're tuning VE with a wideband. STIT goes high when the narrowbands come online. There are heater circuit codes for both, so they don't work until the exhaust heats them up. Look at the logs. The one that remained OL was negative on STIT. STIT went positive in both logs where the engine ran longer and CL enabled. In fact, if you look at the log where STIT isn't quite as high you'll notice that there was a period when it came out of CL at the 212 ECT column.

The voltage sweep of the narrowbands looks great even at idle. You should use them to tune VE up to 85kPa. Set Rich/Lean voltage to 450mV across, but it can be lowered to something like 396 for idle. The transition to OL/PE should be mapped with the wideband. When using the wideband to tune disable LTFT so that they don't interfere, but leave STFT on. When done tuning, re-enable LTFT and put PE thresholds where you want.

[ELSimple]

Ok, I was manually controlling the NBo2 sensors. I will set my NBo2 voltages to 450 and see what that does when I go back to NBCL tuning. I will re-enable STFT with the OL. I pretty much leave LTFT off. I reset my PE thresholds to 30% tonight and made some boost hits. Maybe I have been over thinking everything. Still new to the scene. Thanks for the reply.

should cylinder charge air be biased neutral? I have it more towards IAT's. I use to have heat soak issues before I moved the sensor location.

Polling hertz... are there recommendations for that per PID?

[SiriusC1024]

Yes bias toward IAT, which is zero.

No recommendations on PID's. Keep an eye on them and adjust accordingly. A few of us were on a thread a bit ago and noticed IAT lagged a lot. Check polling hz there.
https://forum.hptuners.com/showthrea...pulling-timing

[SiriusC1024]

Since you've set FPR to 3 bar has offset and SPA been adjusted? I'm seeing some problems with VE at low pulsewidths, and this is a good indicator of incorrect injector data.

[ELSimple]

Since you've set FPR to 3 bar has offset and SPA been adjusted? I'm seeing some problems with VE at low pulsewidths, and this is a good indicator of incorrect injector data.

I am using the data that I was given from the injector provider. They sent it over in a file. I can compare and make sure I copied appropriately. What indicators do you see at the lower pulse width? For my reference.

[SiriusC1024]

The GM data is for a 4bar/58psi fuel pressure setup. The discontinuities of trends in the low rpm/low map regions of the VE table show this. In this area, especially with large injectors, most of the injector firing event is in the non-linear region. Offset and SPA are critical here.

[ELSimple]

The GM data is for a 4bar/58psi fuel pressure setup. The discontinuities of trends in the low rpm/low map regions of the VE table show this. In this area, especially with large injectors, most of the injector firing event is in the non-linear region. Offset and SPA are critical here.

This is how the injector data was sent to me. I copied over the 0 column across the table. They are bosch cores.

2004Tahoe-53 IN1000-43psi.hpt

[blindsquirrel]

IN1000's

They are bosch cores.

Injector data supplied by means of... a tune file? What are these injectors, exactly? I was assuming IN1000 was a typo for ID1000 or something but apparently not.

[SiriusC1024]

They sent it in a tune file? Who made these? IN1000 shows Injector Nation. If so then they are drilled out injectors, and they'll perform poorly. The data is made up, too.

"All products are modified & tested in-house in southeastern Wisconsin with custom equipment built to our specs."
https://www.injectornation.com/pages/about-us

Good luck with those piles of shit. I see it in the VE table. You should get real injectors.

[SiriusC1024]

And those Bosch cores are wide spray angle meant for DOHC. Expect transients due to port wetting, among other quirks.

[ELSimple]

They sent it in a tune file? Who made these? IN1000 shows Injector Nation. If so then they are drilled out injectors, and they'll perform poorly. The data is made up, too.

"All products are modified & tested in-house in southeastern Wisconsin with custom equipment built to our specs."
https://www.injectornation.com/pages/about-us

Good luck with those piles of shit. I see it in the VE table. You should get real injectors.

This is what you get when you try to support ppl. Piinche boat anchors i guess.

[ELSimple]

Injector data supplied by means of... a tune file? What are these injectors, exactly? I was assuming IN1000 was a typo for ID1000 or something but apparently not.

Not a typo bubba.

[ELSimple]

The GM data is for a 4bar/58psi fuel pressure setup. The discontinuities of trends in the low rpm/low map regions of the VE table show this. In this area, especially with large injectors, most of the injector firing event is in the non-linear region. Offset and SPA are critical here.

For reference I downloaded ID1050X and FIC1000 injector data. I figured there would be slight differences in the data between the companies.

SPA min/defaults are the same
Offsets start at 0.0 but the tables are not wildly different from each other

My IN1000 data

SPA min/defaults are different
Offset starts a 6 and reminds me of my deka 80 tables with slightly more voltage.


I set my base psi to 43.5 because the injectors were rated for 43.5. Should I be running a base of 58?

[blindsquirrel]

Any real injector with GM-format data will have that data adjusted for the default GM 58psi. The 43.5psi/3bar numbers are normally like a standardized thing for advertising.

[blindsquirrel]

Oh, and the reason they didn't give you data for 58psi is because they don't have it, either.