08 silverado LY5 with 228/230 cam and DoD delete, shorty headers, stock cats, 3" straight pipe. stock 243 heads port and polished, stock 87mm TB ported and polished. trying to get this thing dialed in for best overall performance on 93 octane fuel. heres my current tune and most recent logs.
For one you're super rich - clean that up before you start messing with timing. Next you have to think about what a cam is giving you and adversely what you are losing with it. Think of it from an adiabatic efficiency standpoint. No different than a diesel being low on compression for example. With most cams you lose dynamic compression in the lower rpms then hopefully gain it back and then some in the higher rpms, so you have to adjust timing thinking about it from that perspective. Also knock settings on these guys are super sensitive - up to you on whether or not to dial them back a little, but typically even 30% will still show plenty of false knock.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Dunno why from the little I looked, but timing is ~10* less than what's in the maps, even after the knock retard goes away. IAT being sky-high is the usual cause but yours looks OK (87* or so, I think it was?).
i just flashed this in and it seems to be running great. anything need to be adjusted?
I have a stock everything-but-tune 5.3 LH6 that makes 400lb-ft & 390hp and only needs 87-88% injector duty cycle. Same injectors as yours. Someting bad wrong.
You shouldn't need 130% duty cycle to make 40 less HP.
where are you seeing the injector duty cycle>?
screenshot.12-03-2023 00.17.50.png screenshot.12-03-2023 00.16.44.png
What it should look like:
screenshot.11-03-2023 14.30.05.png
Are you following a step-by-step guide for tuning this, or just flinging things at it to see what runs good?
been working at it. this is my latest.. any suggestions?
You aren't doing something silly like trying to tune with wideband data while it's still in closed loop, are you?
What are you doing for 'tuning'? Forcing open loop and using wideband data, or closed loop and using trims? It's still between a half and one full point richer, according to the wideband, than commanded. Whatever you're doing should be working to correct that, and it doesn't appear to be doing that.
Oh. This would explain a lot.
screenshot.16-03-2023 05.56.08.png
Put a mechanical gauge on it, verify this pressure reading is real.
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