PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Found My Lost Timing

Old Oct 27, 2002 | 04:22 PM
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Default Found My Lost Timing

Guys, I found my lost timing (timing was around 18-20 and now is 25 degrees or so and I haven't even tried to add any yet). If you have adjusted your MAF table in ls1 edit it can only be adjusted so far before you start to loose timing. I zeroed my table back to stock figures and then adjusted via Injector Flow Rates. In order to bring Ltrims down (make the car run richer so your ltrims will not adjust for a lean condition)you simply take the values down by a percentage. This is not exact so if your ltrims are +10 you do not simply just multiply by 90 percent (taking away 10 percent) so make small changes and then monitor with autotap and see where your at. Just thought I'd through this information out there and give something back from all the information recieved from this board.

P.S. My car runs like a raped ape now, poor 15/275/50 bfgs are hatin' life
<img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" /> ls1 edit
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Old Oct 27, 2002 | 07:59 PM
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From: DFW
Default Re: Found My Lost Timing

How much did you adjust your MAF table that caused the loss of timing?
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Old Oct 27, 2002 | 08:05 PM
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Default Re: Found My Lost Timing

I believe it was just over 115%. If you are really interested I can compare values that I have saved on my laptop.
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Old Oct 27, 2002 | 08:51 PM
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From: DFW
Default Re: Found My Lost Timing

I just wonder @ what percentage in the MAF table the loss of timing may occur.
I have 112% in the MAF table and experienced the same low timing @ WOT -- actually it used timing in the Low Octane Table (even though the gas tank is full).
So I made Hi & Low Octane tables the same...to bring back up the timing.
I may try the Injector Flow Rates table to see what happens.
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Old Oct 28, 2002 | 04:59 PM
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Default Re: Found My Lost Timing

I running the same setup, don't alter you MAF tables, i perfer to alter the Fuel Injector table.
I alter my table a little at a time, happy now with -2-3 ltrims.
The result was to multiply the table be 102% with lowered my ltrims by around 10 to 12 points, like my ltrims were around +8 +10 so DON'T work a percent to correct this, do a little at a time as mention above.
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Old Oct 28, 2002 | 07:06 PM
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Default Re: Found My Lost Timing

I did have to lower my table by a significant amount, however, to get my ltrims around -2,-3. I believe all said and done I lovered my table by 15%. Seemed to work great for me. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
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