AFR, VE, Timing chart review before dyno tune
#1
Junior Member
Thread Starter
iTrader: (5)
Join Date: Nov 2010
Location: Maine
Posts: 400
Total Cats: -19
AFR, VE, Timing chart review before dyno tune
Hey guys,
I'm having a dyno tune done this week and wanted to post my map and charts for review before the tune. I've been using Tunerstudio VEAL to tune what I can with driving the car, but want a full range tune.
Specs:
2004 MSM
BEGI S4 manifold and downpipe
Garrett 2560R with ported wastegate
Artech 3" exhaust
FIC 775cc
MS3x ECU
BEGI #2 FMIC
3.63 gears
AEM UEGO WB 02
Hallman Pro RX MBC set to 11 PSI (would like to go to 12-13 after tune)
GM AIT
Turbosmart BOV
Thanks in advance.
I've also included my MSQ incase someone has a few extra minutes of review time.
I'm having a dyno tune done this week and wanted to post my map and charts for review before the tune. I've been using Tunerstudio VEAL to tune what I can with driving the car, but want a full range tune.
Specs:
2004 MSM
BEGI S4 manifold and downpipe
Garrett 2560R with ported wastegate
Artech 3" exhaust
FIC 775cc
MS3x ECU
BEGI #2 FMIC
3.63 gears
AEM UEGO WB 02
Hallman Pro RX MBC set to 11 PSI (would like to go to 12-13 after tune)
GM AIT
Turbosmart BOV
Thanks in advance.
I've also included my MSQ incase someone has a few extra minutes of review time.
#2
Sounds like a nice setup you've got there, should be a fun ride.
Assuming this is on 93 octane, I feel like you could safely add more timing and save yourself some time on the dyno. Then again, I'm use to looking at 9:1 CR timing maps so you may be closer than what I'm thinking. I'd be interested to see some opinions from other NB2 guys.
You know, that turbo would really like 14-15 psi...
Assuming this is on 93 octane, I feel like you could safely add more timing and save yourself some time on the dyno. Then again, I'm use to looking at 9:1 CR timing maps so you may be closer than what I'm thinking. I'd be interested to see some opinions from other NB2 guys.
You know, that turbo would really like 14-15 psi...
#3
Junior Member
Thread Starter
iTrader: (5)
Join Date: Nov 2010
Location: Maine
Posts: 400
Total Cats: -19
Unfortunately there is only 91 Octane here in Maine (at least around where I am). I know the timing is conservative, but in all honesty I understand the AFR’s and the VE fuel tables, but timing just gets me lost. How do I know what is good, what is bad, too much, not enough… I feel dumb when it comes to that.
I know the turbo would LOVE more PSI, but I’m not so sure about the stock MSM engine.
I know the turbo would LOVE more PSI, but I’m not so sure about the stock MSM engine.
#5
Junior Member
Thread Starter
iTrader: (5)
Join Date: Nov 2010
Location: Maine
Posts: 400
Total Cats: -19
Does these knock setting look correct? I'm having a hard time trusting the knock settings because it goes between %50-%80 at idle and I get the knock warning and it retards timing by 10 degrees. (This goes away as soon as throttle is given)
When tuning the timing and watching for knock, what perectage level is a good reference point to start backing off timing? %30, %50, %70 ???
When tuning the timing and watching for knock, what perectage level is a good reference point to start backing off timing? %30, %50, %70 ???
#16
Junior Member
Thread Starter
iTrader: (5)
Join Date: Nov 2010
Location: Maine
Posts: 400
Total Cats: -19
Ok, I was able to get on the dyno for about 2 hrs. I made a headphone det the night before and they worked great and I'm glad I had them. With the spark map above I had a bit of det around 3500 RPM and found a fuel hole in the same area. I was able to run VEAL in "hard" mode and run the car through the gears at different boost levels to smooth my map a bit. I then reduced VEAL to "normal" and did a few more runs. I then was able to run the car in certain areas of RPM/boost that I was concerned with and tune them manually until I was happy with the tune and comfortable with the spark. I still am running a bit rich at WOT (10.5 afr) but will work that out little bit at a time. The end result was 239HP with 218 TQ. Not quite as much as I was hoping for (250HP) but I'd rather be safe then sorry.
Please note that this was done solo by me, the shop I used for the dyno doesn't touch Megasquirt and is a VW/Audi specialized shop. I'm sure I could get the tune a little better but I don't know of any shops anywhere near me that would do that. This was the only dyno shop I know of within a 70 miles radius.
I'll post charts when I can.
Please note that this was done solo by me, the shop I used for the dyno doesn't touch Megasquirt and is a VW/Audi specialized shop. I'm sure I could get the tune a little better but I don't know of any shops anywhere near me that would do that. This was the only dyno shop I know of within a 70 miles radius.
I'll post charts when I can.
#20
Junior Member
Thread Starter
iTrader: (5)
Join Date: Nov 2010
Location: Maine
Posts: 400
Total Cats: -19
I don't have the laptop I did the tuning with me at the moment. I'll post both maps for comparison. I used the dyno to be able to tune the spark and upper boost fuel levels. I figured that way a could hold RPM and boost is certain areas I knew we're off a bit to tune them safely and legally (the street isn't a place to tune those areas.