Hey guys im finally gona take my car to the track on sunday. Its got a madz tune, the only changes ive made to it are switching it to open loop only by raising the temps for closed loop enable. Im almost certain that its running rich...but no real way to tell. I do have data master though...

So my question is what tables should i focus on? What things should i try. I'll probly get six runs or so in and have plenty of time inbetween runs to mess with my laptop...btw i use tunercats.

Thanks
James

 

Well, I'm still a beginner with the tuning, but I do know that you shouldn't focus on anything but the 95 and 100 kpa MAP columns. Since you'll be running at the track and you'll be WOT, that should be what you mostly focus on. I guess in the Spark Advance vs MAP and VE tables is where you'll make your changes. Since your car is set to run in closed loop (learn disabled) then you won't worry about your BLM's or INT's. They won't have an affect anymore. So, it will be near impossible to get the right fuel mixture. That is for the dyno or wideband O2 tuning. Add timing until you start to get knock and back it off a couple of degrees or to the spot of your fastest run. Try to run the car at the same temperature each time and that will help some with the consistency.

 

You need a wideband to measure and log your F/A ratio. After that you need to modify the PE vrs RPM table. I usually zero the PE vrs Temp table to remove that variable and apply changes to the PE vrs RPM table.

This is only for WOT. There is a lot more to it for idle tuning and cruising to get the open loop tune dialed in. A wideband becomes best friend for that matter.


RG

 

Are the VE tables the same as the PE tables? I know what each one stands for, but I wasn't sure if they were the same. I take it you use Lt1 edit?

 

PE stands for Power Enrichment.
There are two tables in edit.
One is PE/TEMP and the other is PE/RPM.
The VE are the Volumetric Efficency tables. These are only used in Speed Density mode. (MAF-less).

Yes, do my tuning with LT1 Edit.

RG

 

Well, for the guys that use TunerCat, the two "PE" tables are:

1) %Change To Fuel/Air Ratio Vs. Cool Temp @ WOT
2) %Change To Fuel/Air Ratio Vs. RPM @ WOT

Here's a description of what you're talking about from Dr. Mudge in a previous post:

For the dyno I took the 68º reading in PE vs. Coolant Temp (#1) and pasted it into the higher temps as well, to keep the readings from changing on me while tuning. So from there to get my AF to 13.0:1 or so I used the second mapping, and worked with PE vs. RPM (#2).