I am looking for injector data for lsa 12598646 for a p59. I could not get any of the attachments to open.
I am looking for injector data for lsa 12598646 for a p59. I could not get any of the attachments to open.
https://forum.hptuners.com/showthrea...l=1#post821366
Unless you have those injectors in a LSA/LS9 blower manifold, and it's bolted to real rectangle port heads and not cathedrals with adapters, you're really going to want a different injector with a conventional straight spray pattern. The '8646's angled spray only works in that manifold with that injector location on rect port heads.
Originally Posted by SiriusC1024
New and a little tired so maybe I am missing it, looking through all 12 pages it seems all gen3 injector/pcm data is deleted? Only gen4 stuff here?
My spreadsheet is for Gen 4 injectors converted to Gen 3 format. Why can't you get Gen 3 data for Gen 3 injectors from... Gen 3 files that came with those injectors?
Does this help?
GM Gen4 injectors converted to Gen3 format for P01-P59 PCMs.xls
(it's the exact same file, just renamed)
Primarily was looking for 12580426 info.
Way too logical. Thank you
12580426 is the L59 injector, which is Gen 3-only, didn't carry over into Gen 4. 2004-down stock L59/VIN Z files if using the 2004-down return style rails with the 51psi regulator. 2005-up stock L59 files if using the later 58psi returnless setup. All variants of those are in the repository.
I've done one-off conversions for those injectors using non-L59 fuel systems or non-standard pressures, but those are specific to a given combo somebody's put together and requested data for, not something you'd put in a file like this. If you have something that can't use direct copy/paste data from another stock file because it's not got a fuel system that matches one of the two factory setups, just ask.
Thank you, that will at least help me in my journey. Using the returnless setup. My huge downfall is I am using the ?other? brand of tuning so HPT files will do me no good, and it seems far less out there on the other side.
Fortunately my fuel system will be correct psi and returnless. Downfall will be it is a 4.8 not a 5.3.
The injector data doesn't differ by engine displacement, it's a characterization of the injectors themselves. Nothing to do with the engine underneath them.
From a reliable source, the story of the super-cheap bulk packaged 12613412 injectors is something like this: GM had an absolutely huge fleet order that fell through after the parts started being sourced from suppliers but before the trucks were built. It would have cost them more to get the bulk injectors repackaged for retail than they would lose by just dumping the almost four million surplus injectors on the market as-is. Plus, even if repackaged, they would never ever in a million years sell that many pieces through straight retail. Or some variation of that story. Big order, oops not happening, now what?
screenshot.26-03-2025 04.12.59.png
Yikes. These must be more better though, right?
So you've graciously helped out with my tune providing the 12613412 data for a 3 bar / i.e 43psi setup.
Maybe this is a loaded question but seeing as most of these files (and ones provided by companies like FIC) are setup for 58psi, how would one go about converting it to 43psi.
As in I'd like to be able to help myself instead of having to be spoon-fed the exact settings, especially when the injector data is updated I'd like to compare and contrast with the current settings I'm running. and maybe help out some other guys.
I've searched the forum and couldn't find any clear answers outside of adjusting the flow-rate, not sure if any other tables/values need to be adjusted alongside with it.
Or is the advice just get an adjustable fuel pressure regulator and run at 58psi
Last edited by toonwarrior; 03-26-2025 at 10:04 AM.
The way you get the data for 43 PSI is, you do the whole conversion all over again from scratch, just using the columns from 308-388 kPa (or 300-380, if you get really picky and get rid of that 8 kPa/1.6 PSI misalignment) instead of from 408-488.
screenshot.26-03-2025 13.03.15.png
If it's 43 PSI referenced/return then only the one single 308/300 kPa column gets used. 43 PSI returnless/nonreferenced needs all the columns done.
Here's a silly question, the tables you referenced are ECM 12308 & 12307. Is that that like a gen 4 thing?
The one's I can see are ECM 12310 & ECM 12311, and in the injector data in that sheet also references those two tables. What is the process there for conversion to 43psi (or if the tables are actually there and i just can't find it)
Screenshots are from the Gen 4 file, Gen 3 does not use Pressure Delta-style tables. That's what the conversion is for.
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