looking for LS1 26lb injector information

They go by many names, P01, P59, VPW, '0411 etc. Also covering E38 and newer here.
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pmcquay
Posts: 34
Joined: Fri Jan 31, 2020 4:38 am

looking for LS1 26lb injector information

Post by pmcquay »

I'm working on converting my 5.7 Vortec truck (1996, with the spider injector assy) to a set of 26lb LS1 injectors, using a Holley 300-263 intake manifold.

Why those injectors? I got them for cheap, and they've got (I assumed) reasonably comprehensive data available, and theyre larger than the stockers.

Why the conversion? I did the lower intake gaskets on my truck and immediately had another coolant leak, after having it all apart and together again to change out an injector on the spider because it was locking open when left to heat soak with the engine off (I tested that injector with a heat gun out of the truck, I know that that was what was happening. If the engine was left to run it was fine, as soon as I killed it, fuel stops flowing, and air stops cooling the injector, and it locked open when turned back on). That was after having it open before that, to change the poppet injectors to MPFI. Long story short, I am so tired of taking the top half of my engine apart to deal with injectors, and dealing with the rotten cheese grade aluminum lower intake that is unavailable new, that I'm just replacing it with something that works and isn't a pain in the ass to service.

Anyway, before I knew there were 2 different sizes of LS1 injectors, I just bought these because they were one of the sizes supported by this manifold, and theyre definitely larger than the spider injectors. I now am having trouble finding injector maps for these. The best I've found is this bin: https://github.com/Snoman002/Engine-Tun ... G6X5111143 which should be for a 1999 vette, which should have the requisite smaller injectors in the calibration. It does not appear to, or I am missing something that allows it to compensate.

Does anyone have the injector tables for these, or know why the bin I refer to appears not to?
Thorwon
Posts: 95
Joined: Wed Jan 16, 2019 1:34 am
cars: 2007 Hemi powered JKUR
1987 YJ
1955 CJ5
1988 MJ Comanche
Location: Commerce GA.

Re: looking for LS1 26lb injector information

Post by Thorwon »

Check this site out. It has lots of good info on it.
This thread is a good place to start.
https://www.thirdgen.org/forums/tpi/317 ... tings.html
Bad things happen FAST!!!
pmcquay
Posts: 34
Joined: Fri Jan 31, 2020 4:38 am

Re: looking for LS1 26lb injector information

Post by pmcquay »

Ahh, my apologies I was not clear. I know their flow rates at 4 bar. What I need is the maps in the bin that compensate for battery voltage and such. I am running a vacuum referenced fuel system, so I don't need the injector flow rate ramp, or the horizontal axis of the injector pulse width voltage adjustment table.

I spent some time looking around there and it looks like there is a fair amount of information, but this feels like needle in a haystack type stuff. I'll keep looking around, I was just hoping someone would have a bin laying around that shows what I need.

More generally, what I want to understand is if I have missed something looking at these bins and they can compensate, or if the one that should have 26lb/hr injectors was modified (even though it says it wasn't). I suppose technically in closed loop mode the pcm could compensate with fuel trims, but I don't think GM would have been that lazy, especially since these two injectors will probably have different voltage compensation ramps.
pmcquay
Posts: 34
Joined: Fri Jan 31, 2020 4:38 am

Re: looking for LS1 26lb injector information

Post by pmcquay »

Oh, one other detail, I'm running a 12212156 OS, and a lot of the bins I'm finding are either 12212156 OS, and they dont work with my XDF (using DzidaV8's v4, also tried another that might be by him?), or theyre for a different OS (0938 something something). I assume that was an older pcm, but I cant seem to find an xdf for that one. I've also looked here: http://www.gearhead-efi.com/Fuel-Inject ... -Bin-Files in the 99, 2000, and 2001 threads.
pmcquay
Posts: 34
Joined: Fri Jan 31, 2020 4:38 am

Re: looking for LS1 26lb injector information

Post by pmcquay »

I Found it!

Using universalpatcher, I opened the 99 camaro ls1 a4 bin here: http://www.gearhead-efi.com/Fuel-Inject ... &styleid=3, and then I could copy the values from the IFR table in universalpatcher to tunerpro. I couldnt for the life of me find an xdf for that OS, but I think one exists/existed? The values for the injector pulsewidth voltage adjustment table are fairly different, so its good to have them.

Is universalpatcher trying to be an all in one program? I dont really understand the relationship between tunerpro, universalpatcher, and pcm hammer. I do see that universalpatcher appears to contain a copy of pcm hammer, so it looks like to me that I could just use universalpatcher for everything?

Here are the relevant tables, in case anyone stumbles on this thread 10 years from now and has the same problem as me:

Injector Offset:

8.9397 8.9707 9.0171 9.0480 9.0944 9.1563 9.2181 9.2800 9.3419 9.3883 9.4347 9.4811 9.5275 9.6048 9.6667 9.7285 9.8059
8.9397 8.9707 9.0171 9.0480 9.0944 9.1563 9.2181 9.2800 9.3419 9.3883 9.4347 9.4811 9.5275 9.6048 9.6667 9.7285 9.8059
8.9397 8.9707 9.0171 9.0480 9.0944 9.1563 9.2181 9.2800 9.3419 9.3883 9.4347 9.4811 9.5275 9.6048 9.6667 9.7285 9.8059
3.6347 3.6656 3.7120 3.7429 3.7739 3.8357 3.8976 3.9595 4.0213 4.0677 4.1296 4.1760 4.2224 4.2843 4.3616 4.4235 4.5008
2.9541 2.9851 3.0160 3.0315 3.0624 3.1088 3.1397 3.1861 3.2325 3.2635 3.2944 3.3253 3.3563 3.4027 3.4336 3.4800 3.5264
2.2736 2.2891 2.3200 2.3355 2.3509 2.3664 2.3819 2.4128 2.4283 2.4437 2.4592 2.4901 2.5056 2.5211 2.5211 2.5365 2.5520
1.9488 1.9643 1.9797 1.9952 2.0107 2.0261 2.0416 2.0571 2.0725 2.0880 2.1035 2.1189 2.1344 2.1499 2.1499 2.1653 2.1808
1.6240 1.6395 1.6549 1.6704 1.6859 1.6859 1.7013 1.7168 1.7168 1.7323 1.7477 1.7477 1.7632 1.7787 1.7787 1.7941 1.7941
1.4229 1.4384 1.4539 1.4693 1.4693 1.4848 1.5003 1.5003 1.5157 1.5157 1.5157 1.5312 1.5312 1.5312 1.5467 1.5467 1.5621
1.2373 1.2373 1.2528 1.2528 1.2683 1.2683 1.2837 1.2992 1.2992 1.2992 1.2992 1.2992 1.2992 1.2992 1.3147 1.3147 1.3301
1.0981 1.0981 1.1136 1.1136 1.1136 1.1291 1.1445 1.1445 1.1600 1.1600 1.1600 1.1600 1.1600 1.1600 1.1755 1.1755 1.1755
0.9589 0.9744 0.9744 0.9744 0.9744 0.9899 0.9899 1.0053 1.0053 1.0053 1.0208 1.0208 1.0208 1.0363 1.0363 1.0363 1.0363
0.8661 0.9125 0.9125 0.9125 0.8816 0.9280 0.9435 0.9435 0.8971 0.9589 0.9589 0.9589 0.9125 0.9589 0.9744 0.9744 0.9280
0.7733 0.8507 0.8507 0.8661 0.7888 0.8661 0.8816 0.8816 0.8043 0.8971 0.8971 0.8971 0.8043 0.8971 0.9125 0.9125 0.8197
0.7579 0.8043 0.8043 0.8043 0.7733 0.8197 0.8197 0.8352 0.7888 0.8352 0.8352 0.8352 0.7888 0.8352 0.8507 0.8507 0.8043
0.7424 0.7424 0.7424 0.7579 0.7579 0.7579 0.7733 0.7733 0.7888 0.7888 0.7888 0.7733 0.7733 0.7733 0.7888 0.7888 0.7888
0.6496 0.6651 0.6805 0.6805 0.6805 0.6960 0.6960 0.7115 0.7115 0.7115 0.7115 0.7115 0.6960 0.6960 0.7115 0.7115 0.7115
0.5568 0.6032 0.6032 0.6187 0.6187 0.6187 0.6341 0.6341 0.6341 0.6341 0.6341 0.6341 0.6187 0.6341 0.6341 0.6341 0.6341
0.4795 0.5259 0.5413 0.5413 0.5568 0.5568 0.5568 0.5568 0.5723 0.5568 0.5568 0.5568 0.5568 0.5568 0.5568 0.5568 0.5568
0.3867 0.4640 0.4640 0.4795 0.4795 0.4795 0.4949 0.4949 0.4949 0.4949 0.4795 0.4795 0.4795 0.4795 0.4795 0.4795 0.4795
0.3557 0.3867 0.4021 0.4021 0.4176 0.4176 0.4176 0.4176 0.4176 0.4176 0.4176 0.4021 0.4021 0.4021 0.4021 0.4021 0.4021
0.3093 0.3248 0.3248 0.3403 0.3403 0.3403 0.3403 0.3403 0.3403 0.3403 0.3403 0.3248 0.3248 0.3248 0.3248 0.3248 0.3248
0.2784 0.2939 0.2939 0.3093 0.3093 0.3093 0.3093 0.3093 0.3093 0.3093 0.3093 0.2939 0.2939 0.2939 0.2939 0.2939 0.2939
0.2475 0.2629 0.2629 0.2784 0.2784 0.2784 0.2784 0.2784 0.2784 0.2784 0.2629 0.2629 0.2629 0.2629 0.2629 0.2629 0.2629
0.2011 0.2165 0.2320 0.2475 0.2475 0.2475 0.2475 0.2475 0.2475 0.2320 0.2320 0.2320 0.2320 0.2320 0.2320 0.2320 0.2320
0.1701 0.1856 0.2011 0.2165 0.2165 0.2165 0.2165 0.2011 0.2011 0.2011 0.2011 0.2011 0.1856 0.1856 0.1856 0.1856 0.1856
0.1392 0.1547 0.1701 0.1701 0.1856 0.1856 0.1701 0.1701 0.1701 0.1701 0.1701 0.1547 0.1547 0.1547 0.1547 0.1547 0.1547
0.1083 0.1237 0.1392 0.1392 0.1547 0.1547 0.1392 0.1392 0.1392 0.1237 0.1237 0.1237 0.1237 0.1237 0.1237 0.1237 0.1237

IFR:

3.3281
3.3516
3.3750
3.3906
3.4141
3.4375
3.4531
3.4766
3.4922
3.5156
3.5313
3.5547
3.5703
3.5938
3.6094
3.6328
3.6484

Since my fuel system is vacuum referenced, I just used the leftmost column of the offset table, and the first value in the IFR table.
Thorwon
Posts: 95
Joined: Wed Jan 16, 2019 1:34 am
cars: 2007 Hemi powered JKUR
1987 YJ
1955 CJ5
1988 MJ Comanche
Location: Commerce GA.

Re: looking for LS1 26lb injector information

Post by Thorwon »

Glad you found it.
It's a little over my head but I'm learning.
Thanks for posting it.
Bad things happen FAST!!!
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antus
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Re: looking for LS1 26lb injector information

Post by antus »

Tunerpro is just a tuning and logging program. Its open ended in that it requires community members to create file definitions and data stream definitions, and it has a plugin architecture so 3rd parties can extend it too. Its been around the longest, and is possibly getting a bit dated now but still does whats needed, is updated and there have been a large number of definitions created for it.

pcmhammer is an open source flashing tool originally by myself and nsfw, and now with help from others as well. Since the vpw protocol ecms are so similar it currently supports p01, p59, p10, p12 and has limited p04 basic support if you build the latest version yourself. Anyone can do anything with it provided they keep the GPL license terms that it is provided under, and publically release any updates they create for the benifit of everyone. It is just a flash tool, it cant edit files, it cant log pcms.

I cant speak for the universal patcher authors but they are around the forums and my take is they are trying to make it easy to tune. They use definition files that look for magic numbers to decide what a bin file is, and search patterns to find tables in multiple operating systems. because of this it has wider support for more OSs than we have tunerpro definitions for. The better tunerpro definitions probably contain more items than universal patcher can find, but it is the most modern with wide support. It was originally a patcher and segment swapper but has grown in to an editor. Because of pcm hammers open GPL licence they are able to distribute pcmhammer with it to make life easy for tuners so the one package they provide can read/edit/write.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
In-Tech
Posts: 778
Joined: Mon Mar 09, 2020 4:35 pm
Location: California

Re: looking for LS1 26lb injector information

Post by In-Tech »

All you guys are awesome, it's truly what the ohio state majordomo was built on. Plenty of Ken Kelly's(yes there are two) and John Meany(there were two of those too. And not the one who worked at GM)
Anyway, keep on keepin on :)
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