What a mess

[horsepowerguru427]

This is not my build Im just trying to help the guy. Hes already had one engine blown up by his tooner and reached out for help. So far i think im SOL on injector data and 2 bar MAP data, but ill list everything i know at this point.
Popping at idle, dies when placed in gear. Wideband is currently being installed as well.

94 Camaro with 97 harness and P01 pcm from 02 yukon OS 12212156, LT1 stroked to 383 yet cyl displacement in tune still shows 45.5178 (6.0), -30cc dish pistons, M122 supercharger, 0280158279 injectors (cant find data and the tuner changed the flow rate and nothing else, but set flow rate for non-ref system when the car has a referenced system), new fuel regulator installed a couple days ago, 2 bar MAP 307008 FAST, yet the tune was never changed to a 2bar OS and the owner states the tuner installed 2 MAP sensors in remote locations. Walbro 225 pump that was recently changed and fuel pressure verified yesterday. NO MAF by request of the tuner but he never failed or removed it from the tune. No EGR, FAST 6000-6300 ignition box.

Including a few videos for reference along with tune and log. If i forgot any pertinent info then just ask and i can find out. So, other than converting to a 2 BAR OS does anyone have some suggestions? I tried a few changes and it didnt have the intended effect, so i thought id just get some advice.

EDIT: cant upload the videos, but he has 2 remote mounted MAPs. vaccuum from manifold goes to one, which leads to another and it looks like theyre tied together as far as vacuum lines. The electrical from one map goes from the sensor to the ignition box and coils?!?!

[blindsquirrel]

https://en.wikipedia.org/wiki/Law_of_holes

[SiriusC1024]

Get the MAP sensor and injector data correct. Make the guy buy new if that's what it takes. Verify every mod. Set the displacement correct. Spark is much too high for FI.

[horsepowerguru427]

https://en.wikipedia.org/wiki/Law_of_holes

lol thanks for the advice. Thats why im on here. I dont get to play with forced induction much and ive never tuned an LT platform. im pretty familiar with the P01 as most of the tunes i do are gen 3 ls. I just got tune and log files from him 2 days ago and just looked at all of it yesterday, so after my first try at adjusting a couple things that seemed wrong to me the trims went very rich and had trouble starting. So, here i am. I didnt make the situation, the tune, the build or anything. I'm just trying to help the guy if its possible.

[horsepowerguru427]

Get the MAP sensor and injector data correct. Make the guy buy new if that's what it takes. Verify every mod. Set the displacement correct. Spark is much too high for FI.

That was my first thought on spark as well, however when i looked into it a lot of people with similar setups were stating that they ran 36-48* at WOT. Seems too high for me but then again most of what i do is LS. I asked Blindsquirrel earlier in the day about the injectors and he didnt have info and stated he doesnt mess with ford stuff much. I get that. His tuner is the one that told him to buy them since theyre "bosch 52lbs", but clearly his tuner isnt the most knowledgeable. I also wasnt able to find anything on them other than flow rate. I couldnt find anything on the FAST MAP other than sales related stuff...

[blindsquirrel]

I didn't mean that in the sense of 'give up', but trying to plow forward with so many unknowns isn't going to get you anywhere. If dude isn't ready to step back and get things sorted out properly, THEN you should walk away.

What's the ignition system - still Optijunk/single coil or converted to COP? The whole thing needs to be started over from scratch using parts that'll actually work together, this smells like just a random collection of parts that somebody tried to make work through brute force.

[blindsquirrel]

The FAST/Holley/whatever electrical parts are meant to be used with FAST/Holley/whatever EFI systems where you select the components from a predefined menu, they don't need to bother with supplying the specs needed to make them work with other brands of EFI - and especially not the stock PCM.

[2xLS1]

<they ran 36-48* at WOT>

You can run 36-38 on a NA LT1 but not FI.

[horsepowerguru427]

Blindsquirrel,
No, I didnt take it as "just give up" and the owner seems to be willing to put money and time into doing what is needed. Told him to get a wideband, he bought one that day. He just seems excited to actually have someone help him instead of just sending a tune revision every 4 months and not answering messages.
Thats kinda what i figured about the parts and data for them. I guess i was just hoping someone would have ran into this and figured something out before now, but it just looks like hes stuck with what he has or needs to buy different usable stuff.

2xLS1, Its been a while since ive had my LT1 camaro or even ran a SBC, but thats where i recalled timing being for NA engines. Again, i dont get to mess with FI much, but i assumed it needed to be a lot lower for the boost.

Thanks for the input everyone.

[LS ROB]

https://en.wikipedia.org/wiki/Law_of_holes

I sift through these forums whenever time permits, to gain knowledge. I chuckled out loud when I saw this! Universal lesson right here that can be applied to any situation. Good stuff.

[edcmat-l1]

94 Camaro with 97 harness and P01 pcm from 02 yukon OS 12212156, LT1 stroked to 383 yet cyl displacement in tune still shows 45.5178 (6.0), -30cc dish pistons, M122 supercharger, 0280158279 injectors (cant find data and the tuner changed the flow rate and nothing else, but set flow rate for non-ref system when the car has a referenced system),

Spark is much too high for FI.

Not if that piston spec is correct. Has to be pretty low compression. I'd bet 8-9:1ish. Depending on the pulley combo, etc. that might not be too much.

That being said I'd start lower and see what kinda boost it's making.

[horsepowerguru427]

Not if that piston spec is correct. Has to be pretty low compression. I'd bet 8-9:1ish. Depending on the pulley combo, etc. that might not be too much.

That being said I'd start lower and see what kinda boost it's making.

My thoughts as well on the pistons and timing. Lowering it is exactly what i did and sent him a 2 bar OS back with timing and other changes made. We'll see how or if it helps.

[horsepowerguru427]

So, the owner finally decided he'll "splurge" on some new injectors WITH DATA, thank god. It looks like he's got USCAR connectors for the injectors, but its going into an LT1 sbc intake manifold with a supercharger. I feel like my options are limited with this combo. Any of you injector gurus have some suggestions?

[blindsquirrel]

Same dimensions as LS1/LS6 at 14mm/14mm x 64mm long.

[horsepowerguru427]

Same dimensions as LS1/LS6 at 14mm/14mm x 64mm long.

oh, right on! thanks squirrel!!

[blindsquirrel]

Also, the factory LT1 heads have absolutely tiny chambers (53-55cc) so compression is probably higher than you'd think, despite the "30cc dish" being such a large number. It's probably somewhere around 9.5:1 depending on deck height & gasket & etc.

[horsepowerguru427]

Also, the factory LT1 heads have absolutely tiny chambers (53-55cc) so compression is probably higher than you'd think, despite the "30cc dish" being such a large number. It's probably somewhere around 9.5:1 depending on deck height & gasket & etc.

This things is such a fustercluck and im not there in person to verify anything. Im just happy hes willing to spend the money on good injectors finally. Thank you for the input, its Always appreciated.