problem spark advance rpm tuning
07-03-2013, 05:27 PM
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problem spark advance rpm tuning so ive finally got my timing somewhat locked at 22 * (150 shot) my only problem is it locks at 4000 rpm i know its not suppose to be consistant at low rpm but i would like to at least get its some where around 3 grand. In my high octane table i have it start at 1800 i have no knock i dont know whats going on if anyone can give some input that would be great thanks.
07-09-2013, 05:16 PM
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I don't even understand what you're saying, about
"locks" and wanting something by some RPM. But
22 degrees timing against a 150 shot seems kinda
troubling, though I'm no nitrous guru.
"locks" and wanting something by some RPM. But
22 degrees timing against a 150 shot seems kinda
troubling, though I'm no nitrous guru.
07-11-2013, 10:19 AM
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Assuming that your nitrous kit has a WOT switch like most do, I would say you really only need to worry about what your timing is doing at WOT. Also, an RPM window switch is usually something worthwhile as well - so you know exactly when the nitrous will kick on/off (ex. on @ 3k RPM and off @ 6k RPM). Set up the kit for the car....not the tune for the kit. Just my $0.02...
As for locking in timing at WOT, you need to figure out which cells in your timing table are referenced at WOT (grams/cyl). Once you figure that out, I'd go through the timing tables (high and low) and set them where you want them.
As for locking in timing at WOT, you need to figure out which cells in your timing table are referenced at WOT (grams/cyl). Once you figure that out, I'd go through the timing tables (high and low) and set them where you want them.
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07-16-2013, 09:40 AM
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Great - so you just need to log the right PIDs to show you how many grams/cyl your seeing at each RPM interval. Once you have that, you can make the changes in and around those cells in the timing map.
07-16-2013, 08:22 PM
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I haven't been in HPT in a while. In EFI Live, it's called something like DYNCYLAIR. You're looking for a decimal. On a near stock car, it should be in the neighborhood of .72 grams per cyl around 3500-5500 RPM (if I recall correctly). Maybe someone else who is actively using the HPT data logger could chime in?