timing for a stock 02 cam???
timing for a stock 02 cam??? 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
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...
Originally Posted by oange ss
start by using timing tables from a 99-00 F-Body, the 01-02 timing tables suck
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
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Originally Posted by oange ss
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
**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
Last edited by SSpdDmon; Jun 5, 2006 at 10:03 PM.
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Originally Posted by oange ss
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 
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?
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?
Last edited by SSpdDmon; Jun 6, 2006 at 09:57 AM.
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.........
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.
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.
Originally Posted by silverTA2002
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.
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.
Originally Posted by SSpdDmon
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...
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
