HP Tuners
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Burning Brakes
Joined: Jun 2002
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From: Frisco Texas
HP Tuners
I just received my HPTuners edit and scanner. I made some adjustments and it works great. I also did some scans, at WOT my car only pulls 18 to 19 degrees of timing. My knock factor goes up every time I go WOT which pulls timing. I believe my car is running on the low octain table exclusively. I need to figure out how to tune timing. The good thing about HPT is I was able to download my LS1edit pcm and edit it so I did not have to start over.
Safety Car
Joined: Nov 2003
Posts: 4,979
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From: San Diego, CA "leaf" "tee" "e"
I'm still learning, but I copied my high octane spark table to the low octane table. This allows me to KNOW what my timing is, and that it's not going into the low octane table. After I'm done, I'll knock off >4 degrees off the entire low octane table. How are your LTFTs?
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 996
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From: Frisco Texas
Originally Posted by leaftye
I'm still learning, but I copied my high octane spark table to the low octane table. This allows me to KNOW what my timing is, and that it's not going into the low octane table. After I'm done, I'll knock off >4 degrees off the entire low octane table. How are your LTFTs?
Racer
Joined: Mar 2004
Posts: 338
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From: Lancaster Ohio
leaftye, am I reading you right you just copied the table over long enough to get your tuning done then you're gonna return it? I would have a low octane table there to act as a safety net.
cscollis, the Lterms you'll want to look at are the load cell Lterms 6-14. You want all those to be slightly negative. Negative cells means the computer doesn't dump extra fuel when you go to WOT. So when logging you want cells 6-14 to be negative and cell 22 to go to zero at WOT. How much knock are you getting? and give your car "learn" time between adjustments. I put ~50 miles on mine at least to see where it settles at.
cscollis, the Lterms you'll want to look at are the load cell Lterms 6-14. You want all those to be slightly negative. Negative cells means the computer doesn't dump extra fuel when you go to WOT. So when logging you want cells 6-14 to be negative and cell 22 to go to zero at WOT. How much knock are you getting? and give your car "learn" time between adjustments. I put ~50 miles on mine at least to see where it settles at.
Safety Car
Joined: Nov 2003
Posts: 4,979
Likes: 5
From: San Diego, CA "leaf" "tee" "e"
Originally Posted by 0rion
leaftye, am I reading you right you just copied the table over long enough to get your tuning done then you're gonna return it? I would have a low octane table there to act as a safety net.
Originally Posted by 0rion
cscollis, the Lterms you'll want to look at are the load cell Lterms 6-14. You want all those to be slightly negative. Negative cells means the computer doesn't dump extra fuel when you go to WOT. So when logging you want cells 6-14 to be negative and cell 22 to go to zero at WOT. How much knock are you getting? and give your car "learn" time between adjustments. I put ~50 miles on mine at least to see where it settles at.
Most people aim for -2 for their LTFTs. Don't forget to reset the LTFTs from inside HPTuners after writing to the PCM.
Originally Posted by cscollis
Most of the time, my ltrms are -5 to -6. Does that mean I am running rich or lean?
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 996
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From: Frisco Texas
Originally Posted by 0rion
leaftye, am I reading you right you just copied the table over long enough to get your tuning done then you're gonna return it? I would have a low octane table there to act as a safety net.
cscollis, the Lterms you'll want to look at are the load cell Lterms 6-14. You want all those to be slightly negative. Negative cells means the computer doesn't dump extra fuel when you go to WOT. So when logging you want cells 6-14 to be negative and cell 22 to go to zero at WOT. How much knock are you getting? and give your car "learn" time between adjustments. I put ~50 miles on mine at least to see where it settles at.
cscollis, the Lterms you'll want to look at are the load cell Lterms 6-14. You want all those to be slightly negative. Negative cells means the computer doesn't dump extra fuel when you go to WOT. So when logging you want cells 6-14 to be negative and cell 22 to go to zero at WOT. How much knock are you getting? and give your car "learn" time between adjustments. I put ~50 miles on mine at least to see where it settles at.
Thanks for the info. The funny thing is my there is almost no knock but my timing on WOT passes is 19 to 20. The most knock I get is 1.9 to .X from 4000-6400 and most ranges are 0. Does the knock learn number need to be 1 to get full timing? Right now mine is .41 and climbs with every pass. I am guessing that the higher the number, the more timing is pulled.
