First of...I have no plans on changing it....I already understand not to change it in any way shape or form
but what I want to know is has anybody just copied and pasted it into their spark tables???
if its thoeretiocal MAX timing for optimum torque...then how did they come up with it and why isnt our spark table more like it??
really just trying to get a better grasp of how they came up with that table and what it is really for...and why they didnt use it for our V8 F-body timing table
-Scott -
Pasting the max theoretical table into the high octane table is pretty much a standard procedure on the Fords, so I don't know why it wouldn't be worth trying on the GM cars. I am still pulling timing out of my wife's stock timing table to avoid KR at 5000 rpm in 2nd gear, however.
Joe
2002 A4 Corvette, 1967 327 Corvette, 1999 Cobra Mustang \'vert nitrous car (10.7, 128), SCT Pro Racer Package for Ford tuning, HPTuner for Vette.
Pardon the newbie question , but where is this table located ? Also since we use 98 Octane fuel here , I have already taken my copied my high octane to my low octane table ;D . I haven't done anything else yet but timing is on my to-do list. Is this worth trying ? Or should we just do it as everyone says ? Keep giving it timing UNTIL we get KR then back it off a notch or two ?
03 Mercedes ML55 AMG - Stock
06 S2000
06 GMC Sierra 3500 - Tuned
09 GT-R - Stock
09 Lexus LX570
10 Camaro SS , Bolt Ons , Tuned
same page as you High and Low Octane tables....
Engine-> Spark Control-> Spark Advance-> General-> Max Torque Timing vs RPM vs Cylinder Air
not really sure if it appears in other OS's or not
I'm sure its like all GM stuff...some have it, some dont :-/
-Scott -
On many cars, the table axes are not the same, so you can't just copy one table to the other. The table values between the high octane and max are not the same, so just compare them before changing anything.
Joe
2002 A4 Corvette, 1967 327 Corvette, 1999 Cobra Mustang \'vert nitrous car (10.7, 128), SCT Pro Racer Package for Ford tuning, HPTuner for Vette.
Soundengineer--what engine is that max graph for? It doesn't have the dip in the timing around 4400 rpm that my wife's '02 has.
Joe
2002 A4 Corvette, 1967 327 Corvette, 1999 Cobra Mustang \'vert nitrous car (10.7, 128), SCT Pro Racer Package for Ford tuning, HPTuner for Vette.
2002 V8 Fbody
OS 12212156
-Scott -
I guess the Vette's are different. Her's has four 24 degree cells around 4400 rpm. I ran it today at the drag strip after backing off the knock sensor thresholds and finally got it back to around 28 degrees at WOT 4000-6000 rpm. Car ran good, 13.6 at 105 mph, in 2500 feet density altitude air. Street tires, stock gears.
Joe
2002 A4 Corvette, 1967 327 Corvette, 1999 Cobra Mustang \'vert nitrous car (10.7, 128), SCT Pro Racer Package for Ford tuning, HPTuner for Vette.
dam joe...somebody needs to learn how to drive...
I hit a 12.7 bone stock on street tires....
I made a table today....havent had a chance to flash it.....have to drive about an hour and a half to go to work tomorrow....and I'm considering trying it out tomorrow....
-Scott -
My new tables ended up looking like this
remember I have a 2000 Camaro SS
and I am using a 2002 OS...
so I had to do a little conversion...
the 2000 table is RPM on Y axis and Cyl ari on X axis....and not all teh values are there so I had to do a little interpolation between some of the cells....
-Scott -
That looks really aggressive! Did you get major kr?
98 M6 TA, mods: tsp torquer(233/233 .589 112), Patriot golds, ls6 oil pump, ls6 intake, tsp lid, pacesetter LT\'s and ORY, magnaflow, fra, HPTUNER!
havent driven with it yet....
I might try it later today
I also set up the PCM to allow knock retard at all rpms and allowed it to be able to reduce timing by more * just in case...
I'm not going to be romping on it too hard till I can see what it does
-Scott -
WOOF, that is steep!!!
Let us know how it works... I made my best rwhp at 27-28* (peak rpms) but that is with 11.05 to 1 compression (8.30 DCR)...
2007 CTS-V LS2
I drove it...feels good..no knock....
gonna try taking out a few degrees to see if it has better SOP feel...
might do a 2nd or 3rd gear pull and just measure time to accelerate....and use the quickest as my best...gotta have time first....LOL
seems to work though...
-Scott -
damn that is a lot of timing. esp down low. you saw my bin. i have about 29-31 deg wot and no knock. im at about stock compression right now though.
Sulski Performance Tuning
2000 WS6 M6 - LS6 (long block, refreshed top end), 10.8:1 CR, 90 mm ported FAST, Exo-Skel, 227/232 cam, QTP HVMC, EWP, GMMG, 9" w/4.11s
2018 Sierra SLT 5.3L A8 - Airaid intake tube, GM Borla catback, L86 Intake/Ported TB
I tried 26, 28, and 30 WOT timing at the drag strip yesterday. Best time and mph were at 28. Stock A4 '02 Vette.
Joe
2002 A4 Corvette, 1967 327 Corvette, 1999 Cobra Mustang \'vert nitrous car (10.7, 128), SCT Pro Racer Package for Ford tuning, HPTuner for Vette.
The timing for max torque is going to depend a lot on
cylinder filling (cam, exhaust, etc.), available fuel, any
dimension that affects the burn rate. I expect the table
matches up to a stock vehicle by GM engineering's
opinion, but beyond that I question its usefulness as
any kind of guide. It could work, or not.
I never saw any gain by over 30* at the track. This was headers, Ls6 intake, heads, 222/236 114 cam. I don't remember if there was any gain from 28* to 30.
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