blacksssc06

i just wanted to see some of your timing maps for the high octane im just trying to get a idea of what some people are running also if you post one please leave your mods done to thanks mike

Maxim_X

I don't have my map, but I'm running 23* @wot on 93 . I have 60's, 2.8, duall pass and cobra, and catless DP. Oh yeah, not a hint of knock. But I'm kinda rich, real low 11's to maybe 11.5

shaunmcdee

i dont have hptuners on this pc, but i have a modded stage 2 map with 6 degrees of timing added everywhere. My top end is all 25 degrees.
im a 2.6, with meth. No knock.

blacksssc06

can use guys explain to me how i read the cylnder aimass like what 0.08 i mean iknow the rpm

Infernokron

Your spark tables are based on how much air you have in the cylinder at a given RPM. So if I'm at 2,000 RPM and have 0.12 grams of air per cylinder, then I'll run 36* of timing. That's the base timing, before IAT modifiers etc. Now if I'm still at 2,000 RPM, but I suddenly go WOT, and I'm running 1.32 grams of air in the cylinders now, I'll run 1* of timing. Again that's before your modifiers. Those numbers are just made up btw (happen to be what's in my spark table). The general rule is the more air you have in the cylinder at a given RPM the less spark you have, while also the more RPM's you have per amount of air the more timing you have as well. In other words, lots of air at low RPM = very little spark advance. The more RPM's you add the more timing you can add as well (assuming you don't change anything else, IAT's, amount of air, etc.). If you open up the histograms in the scanner it has how much actual timing your running (averaged out) per RPM/(g/cyl). It's the same table as your spark advance tables in the editor, except it shows what your actually getting after all your modifiers.

The grams per cylinder is just how the computers happens to measure the air for that particular table.

This is my High Octane Spark Advance table, it's deffinatly still a work in progress. My mods are in my sig. I've only been tuning for between 3-5 weeks (havn't bothered to keep track). So keep in mind that I may be wrong on some of this stuff, I'm still learning things too hehe.

(Click the picture to DL my table in .txt format)


When you say your running 23* at WOT, is that across the board or peak? Looking for more info on spark tables now that I'm messing with mine hehe.

an0malous

my actual timing after modifiers, builds from 23* to about 27-28. no knock.

blacksssc06

kool thanks this helps out a lot

Area47

anything over 25 degrees up top is pointless.

mine starts at 2k hits 27 degree's, and ramps down to 25 at 7k
2.8
pissed off 42's
meth injection.

an0malous

why is this?

Area47

the added pressure on the crank and rod bearings is not worth the .3 hp. i played with some timing last night on the dyno. my highest hp numbers came from 24.5 degrees of timing from 5500-7200.

Jimmys2007CobaltSS/C

iTrader: (1)

do u have hp tuners??

an0malous

very interesting.

but what about racegas + timing.
your gonna get alot higher than 24.5...

Area47

if i run 11.5 a/f i can run 30 degree's if i wanted.

water injection kicks ass.

an0malous

yeah but you just said it does no good lol.
i dunno it just doesnt make sense in my head.

I can run 27-28*, no knock with stock cooling and no injection.

Area47

in short, back your timing down 3 degree's, you won't feel the difference in the butt dyno. if you have the time and the money, id suggest playing on the dyno to find out what your car likes for timing. it may want 27 degree's every car is different.

im runnin a 2.8/42 set up.

an0malous

hmmm thanks for the info man.
im actually thinking seriously of some dyno time over the colder months.

blacksssc06

yeah

Maxim_X

It peaks @ that, I think it builds from about 20* @3k.

blacksssc06

im thinking about lower boost like 18 and run alot more timing i hear these cars like lower boost and more timing im running 20psi at 25*