12613412 injector data for Gen III, refined version

[blindsquirrel]

E38 source file:

Attachment 147404

[TURBOGNX]

Standard flow bench test is 3bar with n-heptane. GM injectors are rated at 4bar with Viscor to simulate gasoline. IFR2 = IFR1*SQRT(P2/P1) > IFR2 = 40.2*SQRT(4/3) > IFR2 = 48.5. Then multiply by 1.035 to get Viscor/gasoline rate due to density and viscosity difference > 48.5*1.035 = 50.2.

His data is correct, being that it comes from a factory calibration.

So would this apply to all engines, or only LS?
I have a 3800SC with these injectors and HPTuners has almost no tuning capability on these engines compared to a LS where you can change just about everything. I've always been told I have to put in the flow rate with changes for vacuum, then alter the MAF tables to get LTFT correct.

[blindsquirrel]

I'm going to get "flow rate is the least important part of injector data" tattooed across my fking forehead.

I have no idea what tables your "3800SC" file has available, because you haven't said, and besides this is the Gen 3 V8 section, in a thread specifically about injector data for Gen 3 V8 P01/P59s.

[TURBOGNX]

I'm going to get "flow rate is the least important part of injector data" tattooed across my fking forehead.

I have no idea what tables your "3800SC" file has available, because you haven't said, and besides this is the Gen 3 V8 section, in a thread specifically about injector data for Gen 3 V8 P01/P59s.

These are screenshots of the only adjustments I can make for fuel.

As for a specific V8 injector, I did a search for info on flow rate for these injectors, and this is what came up. Whether it's for a 4 cylinder, V6, V8, V12, or W16, shouldn't the flow rate info be the same?

If "Flow Rate" is so unimportant, why not set it in all tunes at 50 across the board, lock it out so no one can change it, and one less useless item to get in the way of tuning?

[blindsquirrel]

Flow rate by itself is pretty meaningless. Errors there are easily compensated by more/less in the MAF table. Who cares! The other data that isn't readily copied from other formats are the important parts - the Offsets, etc.

Fuel pressure for your 2004 VIN '1' is 51psi, right? Not 58, like all these you're looking at the conversions for? And it is a referenced/return regulator, but it sure does not look like it's 1:1 to me, based on stock flow rate tables. This is important not because of the flow rate tables themselves, but because of how the Offset tables need their data set up. The flow rate tables are just an indicator that something funky is going on.

If the stockers flow 36.0lb at 0kPa VAC x 51psi (351kPa), then with 100kPa VAC that should equal a rail pressure of 65.4psi (451kPa), which, if the regulator were 1:1, would give IFR of 40.7lb. But the 100kPa VAC cell in stock files is only 38.4lb.

[gtstorey]

He isn't saying the flow rate isn't important, it's just not any more important than the others setting, but everyone always jumps directly into flow rate, and then they usually only want to look at "flow rate" as what the injector is sold as, Injectors are much more complicated than that.

[blindsquirrel]

Oh, stupid me - of course it's not a 1:1 regulator, otherwise the flow rate & offset tables would be flat from left to right, not sloped.

Hey this may sound crazy but why don't you ask in the V6 section if anybody can convert 12613412 injector data into your weird P04 format? This just doesn't belong here.

[TURBOGNX]

So am I better off setting flow rate as you did, at 50.4 across the board, and then adjust the MAF?
I have it set at 53psi with a vacuum referenced regulator.

[gtstorey]

I did get him to post a log and tune in his v6 post, but I haven't had time to dig into it. I can only really do that on weekends. Not much traffic on that forum except when the v8 guys weigh in.

But definitely getting off track in this thread.

[johnny6696]

My cost was about 260? i think it was.
He wanted them so he paid for them.
I ordered some from Blind Squirrels guy off ebay to compare them to these on the flow bench.

Were you ever able to do a comparison on these injectors?

[eighty6gt]

I'm wondering why the links in the first post are dead; I downloaded these tunes and intend to incorporate the injector data into a tune I'm building from scratch.

[gtstorey]

I'm wondering why the links in the first post are dead; I downloaded these tunes and intend to incorporate the injector data into a tune I'm building from scratch.

I think BlindSquirrel decided he didn’t want them available anymore and pulled them.

[aaronc7]

Just use the file I have in the first reply, it was identical for all intents and purposes. What I run on my car and a few others now.

[epfatboy]

ASS CLOWN TESTING THREAD....

In case you don't know what an ASS CLOWN is or how to spot one this is a good learning tool right here.

Someone pulls together a very valuable set of files with a very specific purpose and posts it with a super easy to understand title.... AND THEN THE THREAD GOT ASS CLOWNED...

The Ass Clowns should be easy to spot but here are some quick tips,
- They ask stupid questions that shows they read 0 posts before posting here
-They post in multiple forums looks for the same response
- They challenge answers they know nothing about
- AND THE BEST PART... They don't know they are ass clowns.
SEE HOW MANY YOU CAN SPOT...

Blind Squirrel -
If your out there forgive or ignore the ass clowns and post those files back up, a lot of people appreciate them.
If not I get it and will make due with what I already found.

[blindsquirrel]

GM Gen4 injectors converted to Gen3 format for P01-P59 PCMs.xls

[epfatboy]

THANKS! That's a shit ton of work, really appreciated. I have a few buddy's who will appreciate the other injector data as well.

[FarmYard]

Thanks!!!!!!!!!