mcamarols1

iTrader: (9)

im done w/ my ve tables, how do i tune my spark tables and wich ones do i adjust,???? how much do i add?? i added 3* to both the low & high tables, and i made some runs and got zero knock everywhere. how far do i take these tables, or am i doing something wrong??? im working w/ HPT

SSpdDmon

iTrader: (10)

Where did you add the timing in the high/low tables?

mcamarols1

iTrader: (9)

everywhere, im running SD

SSpdDmon

iTrader: (10)

You don't really need to touch the timing below .70 grams/cyl in the high/low spark tables when you're running a stock internals motor. Above that, you can add timing. Usually, you don't need more than 2 degrees...

oange ss

iTrader: (50)

start by using timing tables from a 99-00 F-Body, the 01-02 timing tables suck

SSpdDmon

iTrader: (10)

Ummm....not always true. Timing has to do with more than just a number. 01-02s have different head design, different exhaust manifolds, different cam, etc. All of these have an effect on the overall flow characteristics and the true volumetric efficiency of the motor. Therefore, the timing tables are different. I can't run more than 18~19 degrees timing around 4000~4400rpms. But, I still went 12.5@109mph earlier this year with a full 3700+ lb race weight and just bolt-ons. Timing was virtually stock...added a little above 4400rpms. Had I run a 99 table, I woulda been knockin all the way down the track.

oange ss

iTrader: (50)

head design is the same, only the casting process is different.....smaller cam yes, but better intake.....better manifolds but not leaps and bounds above the 99-00....cam timing, chamber design, quench, etc.. all have an effect on the ability to not need or need timing to make the power effeiciently....mcmarols1 try the 99-00 timing tables you'll see what i'm talking about

SSpdDmon

iTrader: (10)

So, you're telling me you can run a 99 timing table in an 02 when at WOT (specifically 2200rpms) the 99 table has nearly 16* more advance and 10* more advance at 3600rpms???? I'd like to see the KR logs from the first WOT run on that one....


**Edit**
FYI - Here's the difference between a 99 and 02 table. The 02 is this much less...

0.76grams/cyl.....0.8grams/cyl.....RPMS
-1.977539........-1.779786........400
-4.987793........-4.790039........600
-4.987793........-4.790039........800
-4.987793........-4.790039.......1000
-5.295411........-5.295411.......1200
-8.283692........-8.283692.......1400
-10.283204.......-10.283204.....1600
-11.469726.......-11.469726.....1800
-14.523926.......-14.523926.....2000
-15.930176.......-15.930176.....2200
-15.446777.......-15.446777.....2400
-12.766113.......-12.766113.....2800
-11.99707........-12.172851......3200
-9.997558........-9.997558.......3600
-7.009277........-7.009277.......4000
-5.229493........-5.998535.......4400
-3.999023........-5.009765.......4800
-5.756836........-6.503906.......5200
-5.976562........-6.877441.......5600
-4.636230........-5.559082.......6000
-4.614258........-5.537109.......6400
-4.592285........-5.493164.......6800
-4.570312........-5.471191.......7200
-4.548340........-5.449219.......7600
-4.526367........-5.427246.......8000

oange ss

iTrader: (50)

i did it in my car with no KR and it made a world of difference, so dont knock it till you've tried it

mcamarols1

iTrader: (9)

can you send me the stock tables for a 99-00 ls1??? also do i work my way down, or up from these tables??? how do i kno if i took it too far or if i took it back too far???

SSpdDmon

iTrader: (10)

You can download a stock tune from http://www.horist.com/hptuners/search.asp?page=search to copy the spark tables. Just keep a real close eye on knock retard and a sharp ear open for ping when you hit the gas if you choose to do this. The numbers I posted above are how much less the '02 table is from a '99-'00 table at WOT (.76~.80 grams/cylinder). It reads, at 6000rpm for example, the '02 tables have 4.5*~5.5* less timing than the '99-'00 tables.

Now, I know the engineers over here at GM (yes, I'm writing this from the Tech Center in Warren, MI) have been known to do some things a little conservative at times. But, to leave that much timing on the table (no pun intended) and not in the PCM for a stock cam'd car is a bit rediculous if you ask me. There must be a reason why they removed it from one year to the next...don't ya think?

oange ss

iTrader: (50)

to keep power down i would imagine...with a better intake and exhaust manifolds i guess they had to do something....maybe they thought the F-Body's were creeping to close to the Vettes.........

silverTA2002

iTrader: (1)

Forget about using other years tables.

To start, I just added 3* across the board. Then I fine tuned the higher load cells (.5 and up) by adding a little at a time, and backing off with any knock.

With Hptuners, using the histogram to find out the exact cells in which you get KR occurs is really easy.

This really helps mid and full throttle power and response. In fact, adding timing for part throttle was where I noticed the biggest SOTP differences with tuning.

mcamarols1

iTrader: (9)

SOTP^????????

Rick@Synergy

iTrader: (5)

I have been able to be more agressive in open loop depending on what AFR you run with the stock cam. Its very possible.

Rick