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Premium Member
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4,248 Posts
Discussion Starter · #1 ·
Well i have hp tuners and spent some time working on my 93 oct tune. I have been happy with it and got it where I want.

Is there an easy way to goto 87 oct, maybe -3 my whole timing table, or just load stock values. Of course i have already tuned MAF so its a MAF only tune. Car has headers and intake. Nothing major. I want run 87 to save a little money on gas for an up coming vacation


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Premium Member
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4,248 Posts
Discussion Starter · #2 ·
anyone????

maybe I will just take out 3 deg globaly and then take it out for a spin and log, if I take 3 out globaly all the WOT tables will be below stock timing anyways, and the stock table was made to run 87 oct anyways. my 93 tune timing is only maybe 1 or 2 deg above stock in a few cells anyways, for WOT at least

any ideas?
 

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HPT Pro Tuner
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3,815 Posts
Mattewo, i've said this a lot in our tuning section, the stock Hi octane timing table wasn't made to run 87 per se, we can run 87 because the knock sensors would adjust your global timing after KR to run 87 safely, but the tables are too advanced in stock form to run 87 octane without having KR, so the PCM would spent a lot more time in the Lo octane table, trying to remove KR out of the stock tune.

Stock minus 3-4* in some spots is what i run for 91 octane, she'll want less than that for 87 octane, burn as much as you can from the current gas tank, and top her off with 87, then start at minus -3 globally, make the lo octane table the same as your high octane, flash and test, remove timing where needed (from both timing tables) until KR is gone, then restore the lo octane table, and compare the Lo octane table with the Hi octane table to make sure the Lo octane has at least 8-10* less timing in the cruising-WOT areas than the high octane table (change the Lo as needed).
 
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