High Spark Table Question?????
Thread Starter
Joined: Apr 2003
Posts: 2,597
Likes: 4
From: Lawrenceville, GA
High Spark Table Question????? Where would you set the WOT Timing in the High Octane Table using Edit? What line should I start to increase the WOT timing-like 0.8 Gms/Cyl??
Thanks,
Bill
Thanks,
Bill
Well 100% volumetric efficiency on a standard day at sea level is .873 g/cyl. If your volumetric efficiency is, say 90% at 4000 rpm and 80% at 6000 rpm, you'd be looking at about .786 g/cyl at 400 rpm and .698 g/cyl at 6000 rpm.
You can also take your MAF/RPM * 15 to get grams per cylinder.
You can also take your MAF/RPM * 15 to get grams per cylinder.
The g/cyl you will see depends a lot on your engine combo.
Mine is still near-stock and 0.77 was typical until I gutted
the cats, now I see 0.80 occasionally / in some regions.
Headers, cam should up this.
I've been going along, nudging up timing and searching
for the ping limit all across the map. With my eventual
intent being that once I get consistent 1 degree of KR
in most every cell, during a long mixed-driving logging
session, I will subtract 2 degrees everywhere and
consider it done. Basically every time I do the drive,
I add 1 degree in regions where I -didn't- see any KR.
If I saw 2 or more on the histogram I subtract (N-1).
Mine is still near-stock and 0.77 was typical until I gutted
the cats, now I see 0.80 occasionally / in some regions.
Headers, cam should up this.
I've been going along, nudging up timing and searching
for the ping limit all across the map. With my eventual
intent being that once I get consistent 1 degree of KR
in most every cell, during a long mixed-driving logging
session, I will subtract 2 degrees everywhere and
consider it done. Basically every time I do the drive,
I add 1 degree in regions where I -didn't- see any KR.
If I saw 2 or more on the histogram I subtract (N-1).
TECH Addict
Joined: Jul 2002
Posts: 2,261
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Originally Posted by Bill Bowling
Where would you set the WOT Timing in the High Octane Table using Edit? What line should I start to increase the WOT timing-like 0.8 Gms/Cyl??
Thanks,
Bill
Thanks,
Bill
https://ls1tech.com/forums/showthrea...ghlight=Timing
Ooooops....sorry no ChrisB. Has anyone heard from him lately? Still working on his PhD??
joel 
Good link...that's basically what I did last year with my TR224 cam and picked up a bunch of midrange tq and hp.
BTW, Bill, you need to log MAF flow at WOT and see what range your car runs at. Then go into the HO Timing in that range and up the timing. Mine for instance, from 1st - 4th gears, goes from like .56 g/cyl to .80 g/cyl.
BTW, Bill, you need to log MAF flow at WOT and see what range your car runs at. Then go into the HO Timing in that range and up the timing. Mine for instance, from 1st - 4th gears, goes from like .56 g/cyl to .80 g/cyl.
