I'm maxing out the spark table at around 3200 rpms on a LS 6.0 with a 78/75 turbo. Is there a fix for this?
I'm maxing out the spark table at around 3200 rpms on a LS 6.0 with a 78/75 turbo. Is there a fix for this?
You could scale the entire tune but that's a lot of work. Most just live with it. Pick a timing value you want to run past 1.20 and deal with the stock computer.
Making sure the tune is spot on helps with how quickly you reach that number too. Like making sure cylinder airmass is right for the engine size, the VE is dialed in and matches the commanded AFR.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Thanks. I don't want to scale the entire tuneOriginally Posted by 5FDP
Or you can use the fuel spark adder table to modify spark. It scales with EQ ratio. EQ ratio scales with MAP on the Boost Enrich Table.
Look in the logs and correlate MAP with CylAir. Subtract on the fuel adder table accordingly.
...I assume your not getting there anytime your not at WOT? Assuming that is the case, beside the advice already given, you just use the last row (1.2) as your timing for WOT, which can obviously still be adjusted based on rpm for everything at and above 1.2
Really though, hitting 1.24g at 150kPa makes me think your injector data isn't correct. 88.92lb/hr, 152kPa, 3300rpm but only 29% duty cycle? Map values could be wrong. Cylinder volume. Fuel pressure. Let's see the tune and part numbers.
Oh shoot, I didn't see the .HPL when I first responded. Yes, let's see the .HPT.
If you need more fidelity in timing you can setup Boost PE to target different AFR's and then use that AFR to pull timing. does that make sense? It's a old trick.
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I just looked at one of my logs and noticed I'm above 1.2 by 3500 rpm and 4 psi of boost (rolling in the throttle and stopping at about 60% throttle angle) with a centri. supercharger. 6.3L LS1, good aftermarket heads and cam.
That's only a reliable indicator if you know it has been tuned properly, and for somebody new who shows up here that we don't know from Adam's housecat that would be a bad assumption to make. I could show you a log with a 100% stock 5.3 truck engine doing 1.60g. It's easy, just multiply the stock VE table by 2.
Plenty of NA stuff will get up near or even over 1.00 properly tuned. If you actually do the VE math and compare it will run near the true VE %. If you have 100% in the VE table it will read very close to 1.00 dyn/air. Not exact but close.
I would double check fuel pressure and injector data for sure.
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