changing injectors question about startup

[MWILSON1995Z]

You should really give more information about what you're tuning, mods, etc. up front.

358 ci LT1 all forged bottom end 10.3:1
Trick Flow 185cc heads, 5 angle VJ all 7/16 hardware SS 1.6 Rockers
Springs are set at 160# @ 1.895 & 425# @ 1.295
292XFI HR13
Factory Intake with BBK 58mm TB
Dougs 1 3/4" headers off road X with original flowmaster 40
Powerdyne BD11A @ 7-8psi draw thru Maf sensor
ARP studs everywhere
Canton racing oil pan & valve covers
Still running Optispark buit everything is new and working for now!

Thank you for any help! I have EE Hack I use for data logging and Flash hack for writing, tuner CATS for making adjustments

[spfautsch]

Sig is updated. Unfortunately I think you'll need to use TunerProRT because I'm not sure tunercat has the base pulsewidth multiplier defined. Also the readme is written specifically for TunerPro. If you have any feedback feel free to PM me or post here, I don't think anyone has used this other than myself.

I didn't catch the supercharger in your introduction post - so are you running pure MAF or do you have patches for >1bar MAP (if such a patch exists)? Intercooler?

[MWILSON1995Z]

I see the following:

ECM Constants Table
Minimum Injector Pulse Width--------1.099 msec

I also have MAF sensor tables

I just ordered an integrated AFR guage with 2 oxegen sensors for data logging

[spfautsch]

I see the following:

ECM Constants Table
Minimum Injector Pulse Width--------1.099 msec

If you look at your bin with the .xdf in the startup tables zip in TunerPro, there are actually two values that need to be changed here. The factory bin has 1.44 ms in both. One is the threshold, and the other is the value used when the threshold is reached. I think it's labeled '126d7 - use this value when MIN inj pulse reached'. I have mine set thusly:

126d5 : 0x002f (0.73 ms)
126d7 : 0x0030 (0.075 ms)

The larger # in the second constant is just to make sure the injector actually fires. I've never seen pulsewidths commanded this low, and you probably won't either, but it doesn't hurt to be thorough.

Addition items you'll want to modify are the 129f5 Injector Offset Adder table, and 129d5 Injector Voltage Offsets.

For the offset adder table, most folks zero this out because the bosch style injectors flow more below the knee (the point where the injector's flow rate goes static). The original Multec injectors have a lower flow rate below the knee.

The voltage offsets should have been provided by the vendor. You may have to interpolate some of the voltage points, but all that's critical here are the voltage range you'll actually be running in, say 7-16 volts.

[MWILSON1995Z]

If I load my bin in Tuner Pro I really dont know where to go from there and I dont think I have an XDF file? Im used to Tuner CAT which Im new at as well.

[MWILSON1995Z]

Typical Flow Rate in LB per hour: 60 LBS/HR @ 45 PSI
Typical Flow Rate in CC per minute: 630 CC/min @ 45 PSI
Actual flow rate of your injectors may vary but will be matched together ( mine vary from 54.5-55.5 )
Resistance: 10 ohms (High Impedance, High Resistance)
Voltage: 8-15 Volts, nominal 13.5 Volts
Amperage: 1.0 Amps
Pressure: Min 30 PSIG / Max 100 PSIG
Electrical connector type: EV1 (Minitimer, Jetronic)

[spfautsch]

If I load my bin in Tuner Pro I really dont know where to go from there and I dont think I have an XDF file? Im used to Tuner CAT which Im new at as well.

There's a readme file in the spreadsheet package in my sig that will get you started crawling with TunerPro. That's as close to spoon feeding you're going to get out of me, sorry.

As I mentioned in the PM, 1 lb/hr difference in a set of matched injectors seems really excessive. But at least they gave you that data. Are these injectors new / modified / used + cleaned? You'll need an offset table for them.

[MWILSON1995Z]

They are new, downloaded the file thank you

https://treperformance.com/i-2061898...jectors-8.html