Reccommendations for tuning on a dyno
Reccommendations for tuning on a dyno I'm going to have a little time on a dyno this weekend to tweak my tune.
I'll be using the dyno's WB to tweak my A/F and will be working on my spark tables also. What kind of things should I log? Does anyone have a .cfg file they use on the dyno?
Just looking for a little direction as far as procedures/what to expect so I can make the most of my time on the rollers. I poked around a little on the HPT forums, but wanted to get opinions from the masters here also.
Thanks in advance.
I'll be using the dyno's WB to tweak my A/F and will be working on my spark tables also. What kind of things should I log? Does anyone have a .cfg file they use on the dyno?
Just looking for a little direction as far as procedures/what to expect so I can make the most of my time on the rollers. I poked around a little on the HPT forums, but wanted to get opinions from the masters here also.
Thanks in advance.
Personally, I never use a dyno wideband stuck in the tail pipe... I put mine in the header in place of a stock front one (unless they have an extra bung installed)... much more accurate than sticking it in the pipe - especially at idle and part throttle, but even at WOT...
As far as logging, I log commanded AFR, wideband AFR, spark, knock, MAF frequency, MAP, TPS, RPM, INJDC, coolant temp, intake air temp...
As far as logging, I log commanded AFR, wideband AFR, spark, knock, MAF frequency, MAP, TPS, RPM, INJDC, coolant temp, intake air temp...
Thanks for the reply. I have an extra bung instilled in the driver's side collector that has an LC-1 installed, but I'm not using it yet since I don't have the Pro cable. I have catted mids, so would that extra bung be the best to use?
I've read so many threads in the past week that its starting to make my head spin. I'm running SD, by the way.
I've read so many threads in the past week that its starting to make my head spin. I'm running SD, by the way.
2nd that. Also, if you have cats they produce water which can coat the o2 sensor giving false readings. To get the most out of it get an extra bung welded in front of the cats and as close to the collector as possible.
EDIT: Damn, beat me by 6 minutes...
EDIT: Damn, beat me by 6 minutes...
I would put the wideband in a bung in front of the cats...
You did pretty damn good, I had to look at my log profile. 
nmcqueen469 - It would be best to get your LC-1 working so you can have your own wideband logged with the rest of the data.
nmcqueen469 - It would be best to get your LC-1 working so you can have your own wideband logged with the rest of the data.
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I like both WB's as well........sanity check's.
You mentioned you are SD, is the MAF still in place? If so I would dial the MAF in while on the dyno, quick & easy if you are on a load type.
You mentioned you are SD, is the MAF still in place? If so I would dial the MAF in while on the dyno, quick & easy if you are on a load type.
Here's my standard logging pids for both the real and street dyno. I guess I don't really need the o2 sensors anymore, but haven't found anything more usefull to replace them. Maybe someone can post an HPTuners version.
You can filter out all values greater than 0.0 in the KR histo so that nothing shows up unless it's KR. If you don't, all of the times that you DON'T knock and are in a cell, a zero is averaged in with the recorded KR value.
In this case, though, the knock map has the max value button (up arrow) selected not average so it shows the highest value in each cell. But you're right, if average is on the 0s can really distort the data unless you do like you said. 