PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

PCM sometimes pulls timing but can't for what reason.

Thread Tools
 
Search this Thread
 
Old Nov 7, 2013 | 06:47 PM
  #21  
Chevy406's Avatar
9 Second Club
iTrader: (12)
 
Joined: Feb 2007
Posts: 781
Likes: 11
From: Huntsville, AL
Default

this may or may not fix your timing:

Engine > Torque Management > Spark Retard zero this table out
Engine > Torque Management > Torque Loss % zero this table out

Is it a safe bet to say you have some low speed idle & cruise driveabililty issues? You need to practice smoothing the VE and Spark tables and blend your High/Low octane tables with your idle advance tables. Lots of room for improvement. Idle adaptive spark control is quite aggressive. Maybe that works well for you?
Reply
Old Nov 7, 2013 | 07:10 PM
  #22  
mike13's Avatar
Thread Starter
10 Second Club
iTrader: (27)
 
Joined: Sep 2008
Posts: 2,229
Likes: 0
From: Lake Tapps, WA
Default

Originally Posted by Chevy406
this may or may not fix your timing:

Engine > Torque Management > Spark Retard zero this table out
Engine > Torque Management > Torque Loss % zero this table out

Is it a safe bet to say you have some low speed idle & cruise driveabililty issues? You need to practice smoothing the VE and Spark tables and blend your High/Low octane tables with your idle advance tables. Lots of room for improvement. Idle adaptive spark control is quite aggressive. Maybe that works well for you?
thank you, I'll try that, how should I smooth the tables? by interpolating?
Reply
Old Nov 8, 2013 | 08:14 AM
  #23  
Chevy406's Avatar
9 Second Club
iTrader: (12)
 
Joined: Feb 2007
Posts: 781
Likes: 11
From: Huntsville, AL
Default

I typically start in the graph mode and manually straighten it up. Then using the smooth and/or interpolating functions helps. For the ignition tables, after you smooth the high and low octane, copy the pertinent idle rpm columns from the high octane to the idle tables.

I'm really not sure how you ended up with the VE table. Apparently it works for you if you have taken a 4,000+ lb vehicle to over 140 mph in the 1/4 mile. Hopefully you are using a wideband to monitor?
Reply
Old Nov 8, 2013 | 08:21 AM
  #24  
mike13's Avatar
Thread Starter
10 Second Club
iTrader: (27)
 
Joined: Sep 2008
Posts: 2,229
Likes: 0
From: Lake Tapps, WA
Default

Originally Posted by Chevy406
I typically start in the graph mode and manually straighten it up. Then using the smooth and/or interpolating functions helps. For the ignition tables, after you smooth the high and low octane, copy the pertinent idle rpm columns from the high octane to the idle tables.

I'm really not sure how you ended up with the VE table. Apparently it works for you if you have taken a 4,000+ lb vehicle to over 140 mph in the 1/4 mile. Hopefully you are using a wideband to monitor?
yes using a wideband, I'm only at 14lbs boost. Thanks for your help
Reply
Old Nov 8, 2013 | 08:42 AM
  #25  
mike13's Avatar
Thread Starter
10 Second Club
iTrader: (27)
 
Joined: Sep 2008
Posts: 2,229
Likes: 0
From: Lake Tapps, WA
Default

Chevy406 The VE table is probably not what it should be, my focus was fuel and timing in boost, keeping the afr's in the 11.0 11.3 range. Also running a 50/50 of 114 and spraying 100% meth.

I slowly increased the timing going into boost and in boost to wake the car up and spool the turbo. Also added timing to spool the turbo being careful to look for any signs of KR. Not a tuner by any means and was just staying focused on the tune while racing the car. Only made changes 1 at a time and didn't pay attention to the drivability yet.
Reply




All times are GMT -5. The time now is 09:19 AM.