PCM Diagnostics & Tuning HP Tuners | Holley | Diablo
Sponsored by:
Sponsored by:

Why does the timing decrease in the HO table?

Thread Tools
 
Search this Thread
 
Old 12-01-2004, 08:44 PM
  #1  
TECH Fanatic
Thread Starter
iTrader: (8)
 
BBADWS6's Avatar
 
Join Date: Sep 2003
Location: Houston/Magnolia, TX
Posts: 1,109
Likes: 0
Received 0 Likes on 0 Posts

Default Why does the timing decrease in the HO table?

on a stock tune, in the high octane table, why does the timing drop to 23 * at 4800 RPM at wide open throttle? This is on a 1999 WS6. It seems like you would want to hold the timing constant....
Thanks

Last edited by BBADWS6; 12-01-2004 at 08:49 PM.
Old 12-01-2004, 08:58 PM
  #2  
12 Second Club
iTrader: (1)
 
CamTom12's Avatar
 
Join Date: Apr 2004
Location: Clarksville, TN
Posts: 1,369
Likes: 0
Received 0 Likes on 0 Posts

Default

I'm not sure why, but I think GM puts that in all their cars. I have a friend with an LT1 and LT1 edit that had the same question the other day...
Old 12-01-2004, 09:54 PM
  #3  
TECH Fanatic
iTrader: (1)
 
luv2spd's Avatar
 
Join Date: Feb 2004
Location: Newton, KS
Posts: 1,152
Likes: 0
Received 0 Likes on 0 Posts

Default

I believe GM did this at peak torque to prevent kr.
Old 12-01-2004, 10:29 PM
  #4  
TECH Addict
 
Another_User's Avatar
 
Join Date: Feb 2004
Posts: 2,826
Likes: 0
Received 0 Likes on 0 Posts
Default

I believe GM did it at peak torque to prevent having a higher peak torque from the factory.
Old 12-01-2004, 10:44 PM
  #5  
TECH Enthusiast
iTrader: (3)
 
Third Gear's Avatar
 
Join Date: Jun 2004
Location: Chino Hills, CA
Posts: 640
Likes: 0
Received 0 Likes on 0 Posts

Default

I like the torque theory... perhaps that's why smoothing out my timing gave me way better torque gains, than horse power.

Oh Another User - nice Avatar man I laughed pretty hard when I saw that! Nice!
Old 12-01-2004, 10:53 PM
  #6  
TECH Addict
 
Another_User's Avatar
 
Join Date: Feb 2004
Posts: 2,826
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by NavySS
I like the torque theory... perhaps that's why smoothing out my timing gave me way better torque gains, than horse power.

Oh Another User - nice Avatar man I laughed pretty hard when I saw that! Nice!
I did a lot of work on that Avatar. I'm glad somebody appreciates it! Thanks!
Old 12-02-2004, 12:33 AM
  #7  
TECH Fanatic
iTrader: (1)
 
luv2spd's Avatar
 
Join Date: Feb 2004
Location: Newton, KS
Posts: 1,152
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Another_User
I believe GM did it at peak torque to prevent having a higher peak torque from the factory.
This very well could be, but I still think part of the reason is that GM wanted a "safe" tune b/c they couldn't tune each individual vehicle. At peak torque cyl. pressure will be the highest so they pulled a little timing as a safety net.
Old 12-02-2004, 01:04 AM
  #8  
12 Second Club
iTrader: (1)
 
CamTom12's Avatar
 
Join Date: Apr 2004
Location: Clarksville, TN
Posts: 1,369
Likes: 0
Received 0 Likes on 0 Posts

Default

Both ideas make sense to me.

I love the SD avatar, too! BTW, is your homepage down, Another_User?
Old 12-02-2004, 12:17 PM
  #9  
TECH Fanatic
Thread Starter
iTrader: (8)
 
BBADWS6's Avatar
 
Join Date: Sep 2003
Location: Houston/Magnolia, TX
Posts: 1,109
Likes: 0
Received 0 Likes on 0 Posts

Default

The peak torque idea makes a lot of sense to me, thanks. Any other imput guys?

-Chris




All times are GMT -5. The time now is 06:19 PM.