Dry tuning
Dry tuning What table in ls1 edit can i add fuel just when spraying? Ive got the timing coming out per Robert's instruction according to maf. Also does the maf max out at 483.12 g/s. And how accurate is commanded A/F log in efi live?
The easiest is to just change your WOT PE Multiplier, to get the commanded a/f you desire. Now, commanded and what you actually get spraying can be off a bit. So, start fat and work leaner till your satisfied. For instance, a multiplier of 1.275 will give a commanded 11.53 a/f, now the spray, from my experience it will be richer than commanded. It's not perfect because of the cold/dense reading (depends on nozzle location) and the subsequent increased duty cycle. So you'll have to play around with the PE multiplier.
Here is the math for n/a a/f tuning of the WOT PE Multiplier:
14.7 / multiplier = commanded a/f @ WOT
So using the above example/numbers,
14.7 / 1.275 = 11.529, or 11.53 commanded a/f
Hope this helps. My set-up, I was able to keep all my n/a a/f across the board in the 13.x range, and 11.5 range on spray. But, I do have four nozzles and tuning of said nozzles was easier than some set-ups.
There are other ways. But you could just save a spray tune and a n/a tune. On the HP Tuners, it takes just a matter of seconds to change from one to the other.
Robert
Edit: Check out my new web, in my sig, doing a write up currently on timing pull for the dry hit. Also, started a nozzle location/tuning write up.
Here is the math for n/a a/f tuning of the WOT PE Multiplier:
14.7 / multiplier = commanded a/f @ WOT
So using the above example/numbers,
14.7 / 1.275 = 11.529, or 11.53 commanded a/f
Hope this helps. My set-up, I was able to keep all my n/a a/f across the board in the 13.x range, and 11.5 range on spray. But, I do have four nozzles and tuning of said nozzles was easier than some set-ups.
There are other ways. But you could just save a spray tune and a n/a tune. On the HP Tuners, it takes just a matter of seconds to change from one to the other.
Robert
Edit: Check out my new web, in my sig, doing a write up currently on timing pull for the dry hit. Also, started a nozzle location/tuning write up.
Last edited by Robert56; Nov 24, 2007 at 12:00 PM.
How accurate is the commanded A/F log in EFI Live? Commanded is what the PCM is telling the car to be at for AFR, so its not really how accurate the commanded AFR is (as long as it what you selected/programed for the various conditions), its how close the actual AFR is to Commanded. This is the reason tuning is both art and science, the best tuners will have the actual AFR very close to commanded without using tricks like just lower or raise the commanded PE till you get what you want for actual...Doing it that way may work, but its a shortcut to solve other issues for someone who does not want to put time in to solve the other combination of errors such as IFR or VE tables etc...
Last edited by Beer99C5; Nov 24, 2007 at 04:03 PM.
