New Fuel Pump VE Try 2

[SiriusC1024]

Little tip for you guys. OP if you can get it to pop and note a very specific time stamp in your data log where it does it, Sirius, apply 10-15% over in your VE at that specific area, could be enough to fix the lean pop. You're overcompensating, and some of the time the trims will be pretty negative moving through there, but it may fix the problem.

Probably right. When I was doing VE, STFT's were calling for 7% during throttle stabs in some places. I graphically averaged it to try to make the best of the situation. Maybe not enough though. If I go too far it'll run poorly during a steady-state transition along those areas. Having to sort out some compromise is why I stated my displeasure with those injectors in the previous thread that kingtal0n hijacked.

Pretty wonky looking VE. At least it's controllable. I don't think I like those injectors. How come you're running such large ones on an NA build?

Next log take it to full throttle, shifting at redline.

[Lxjoshxl]

Probably right. When I was doing VE, STFT's were calling for 7% during throttle stabs in some places. I graphically averaged it to try to make the best of the situation. Maybe not enough though. If I go too far it'll run poorly during a steady-state transition along those areas. Having to sort out some compromise is why I stated my displeasure with those injectors in the previous thread that kingtal0n hijacked.

Yeah Im surprised they are so bad I thought they were a good brand. Well this run was pretty good didnt notice any popping. the popping was very sporadic before. Yeah That King guy just kept going on about irrelevant shit at the time. heres a log pulled it hard a few times
dyn 1 run 1.hpl

[edcmat-l1]

Probably right. When I was doing VE, STFT's were calling for 7% during throttle stabs in some places. I graphically averaged it to try to make the best of the situation. Maybe not enough though. If I go too far it'll run poorly during a steady-state transition along those areas. Having to sort out some compromise is why I stated my displeasure with those injectors in the previous thread that kingtal0n hijacked.

That made me LOL. I'm grateful to you for helping run him off.

[gtstorey]

My bad I totally spaced that I don?t have a floppy tape my kids took it lol I could always use string

Mark tire and concrete at bottom of tire. Drive one rotation (mark again at bottom of tire) and mark concrete. Circumference is distance between marks on concrete. Or drive multiple rotations and divide length by rotations and pi. Just count the rotations.

[edcmat-l1]

Pi, used to find circumference. 32" tire x 3.1415 = 100.5". The circumference of the tire, or the distance it travels in 1 revolution. Class dismissed.

[SiriusC1024]

https://www.mcmaster.com/products/pi-tape/

[SiriusC1024]

Let's have a log of MAF_4, please.

[SiriusC1024]

That made me LOL. I'm grateful to you for helping run him off.

It'd be nice if it didn't come to that, though. He just wouldn't stop. I told him to make his own threads, but no.

[Lxjoshxl]

Let's have a log of MAF_4, please.

this is from the dyn air tune
dyn 1 run 2.hpl
dyn 1 run 1.hpl

[SiriusC1024]

I know. Fuel trims are way off, so I wanted to check. I don't think it's going to work well in anything but SD. Want to do that?

[Lxjoshxl]

re created the pops longer log is 4min in to end
pops 4min in.hpl
pops.hpl

[Lxjoshxl]

popping at end of log.hpl

[SiriusC1024]

Which tune did you run on those?

[Lxjoshxl]

Which tune did you run on those?

The last tune with dynamic air

[SiriusC1024]

Alright, so try it like this. All the changes up to this point but set to SD. See if there's difference.

[Lxjoshxl]

Alright, so try it like this. All the changes up to this point but set to SD. See if there's difference.

No Popping Noticable But lost a lot of the responsiveness. If its really garbage injectors im about to just eat the 450$ or I just need to adjust the VE High Map High Load Lower RPMs?sd 8 1.hpl

[SiriusC1024]

SD and MAF are each close on fuel trims, but the two are different. When they're combined it goes to hell. That's what I was saying about MAF glossing over the details, and when SD is referenced it comes off MAF and wants to pull fuel. Strange that you're feeling less responsiveness with SD. Normally the opposite is true.

New injectors would be worth it. Sure, you already paid for them, but you keep paying for them if you know what I mean. Sunk cost fallacy. Set of Gen IV injectors from a reputable supplier (not amazon, ebay) would be my recommendation. Something like the 50lb L96 injectors 12613412. Blindsquirrel already has the data converted, and there's a sizing/PN sheet here:
https://forum.hptuners.com/showthrea...pository/page2

Maybe give this a shot before you decide. If this is fine we'll switch to the Enhanced SD custom OS so High and Low spark work again. This is about as good as it's going to get.

[Lxjoshxl]

SD and MAF are each close on fuel trims, but the two are different. When they're combined it goes to hell. That's what I was saying about MAF glossing over the details, and when SD is referenced it comes off MAF and wants to pull fuel. Strange that you're feeling less responsiveness with SD. Normally the opposite is true.

New injectors would be worth it. Sure, you already paid for them, but you keep paying for them if you know what I mean. Sunk cost fallacy. Set of Gen IV injectors from a reputable supplier (not amazon, ebay) would be my recommendation. Something like the 50lb L96 injectors 12613412. Blindsquirrel already has the data converted, and there's a sizing/PN sheet here:
https://forum.hptuners.com/showthrea...pository/page2

Maybe give this a shot before you decide. If this is fine we'll switch to the Enhanced SD custom OS so High and Low spark work again. This is about as good as it's going to get.

Yeah It’s a lot of time vs money at this point, if we’re just going off the injectors. I forgot which tune file it was but when we went to that it got way better, just recently the last few maf tune files before dynamic air was turned on I noticed the popping come back. The SD Files I can’t recall having it on the last ones too. We are getting a bunch of snow tomorrow so I’ll have time to play around with that last tune you posted and try to go back and see which tune file was running really good. Do you think the Gm injectors whether 40lb 50lb etc are just better than aftermarket ones? Is it because the injectors are just way oversized for my setup? While in PE it runs like a champ but that takes all the other fuel tables out of the equation right? Or am I mistaken on that. Also Fueling aside like I was mentioning that issue I was having with aluminum content being high in my oil could anything internally be causing these issues?
Thanks-Josh

[SiriusC1024]

The GM injectors are the best option. Good data and meant for the application. The current injectors don't have accurate data in my opinion. Not only IFR is questionable, as evidenced by the high VE values, but the inaccuracy of the non-linear region is magnified by the injectors being oversized. Larger proportion of flow is non-linear.

Those other tunes you mentioned might have removed the popping, but that was because they were rich. The lean spots not able to be tracked weren't apparent then.

PE is open loop. Just like OL, PE still references the airflow tables. PE adds to them, but it's informed by the LTFT's. That's why I shake my head when I see a tune with only STFT turned on. During PE the narrowbands are ignored because they can't track anything beyond a literally narrow band around a stoichiometric air/fuel ratio.

[Lxjoshxl]

Well for now MAF 4 Is whats working turned the regulator a hair up. Either way motors unfortunately going to have to come apart soon i think.
01 SILVERADO 2500-231216 blackstone.pdf
maf 4 warmup.hpl
maf 4 1.hpl
maf 4 2.hpl
maf 4 3.hpl
maf 4 4.hpl