$EE Speed Density tune 383 LT1

[96lt4c4]

This is the same car that I have been working on that had the 41 degrees timing at WOT. That issue is fixed. The car also had some wierd surging going on that seems to come and go. I am taking the car home over this weekend to do some tuning and troubleshooting. I plan to get it lined out for my buddy, so that I can be done with it. Since I think the MAF could be causing some of the issues, I thought about ditching it all together. A lot of the LS1 guys go speed density, I was kicking around the idea of doing it to this car. As far as I can tell I need to set the speed desity bit and turn off the MAF error code. Anyone ever do this?

This gets the MAF out of the air flow into the engine, this car is easy 500 hp and I think could benefit from removing it.

[EagleMark]

Been done lots. Speed Density Mode (X= Enabled) uncheck and DTC MAF System Diagnostic, Error 48 uncheck. Then tune VE like always.

Dave W made a VE Spreadsheet for me somewhere here... I lost my copy with laptop failure...

[96lt4c4]

Working on this car this weekend, welded in a bung for the wide band, and tuning for speed density. Going pretty good so far except idle is going lean and BLM's are showing rich. I am trying raising idle RPM and raising idle timing, to get MAP reading to come down closer to 40 KPA. If I cant get this lined out how do I force Open Loop idle in this mask $EE. I see "Closed Loop Idle Enable Vehicle Speed" but not sure what it does. I modified the VE spread sheet floating around and added the RPM and MAP reading for this mask to help me with tuning off idle VE. But, if I cant fix idle I will have to go closed loop.

Here is the cam

http://www.compcams.com/Company/CC/c...csid=1111&sb=0

[EagleMark]

I've never found a way to OL Idle only with LT1 in TunerPro or TunerCat, but with that cam OL all the time does well. "Min. Cool. Temp. for Closed Loop" raise to max.

The O2 sensors are lieing at idle with that cam, but if it is running OK CL you can play with individual fuel trim at idle settings to remove/add fuel.

[96lt4c4]

I've never found a way to OL Idle only with LT1 in TunerPro or TunerCat, but with that cam OL all the time does well. "Min. Cool. Temp. for Closed Loop" raise to max.

The O2 sensors are lieing at idle with that cam, but if it is running OK CL you can play with individual fuel trim at idle settings to remove/add fuel.

Tuned on the car all day, raised idle to 950, and closed throtle advance is at 38 degrees. BLM's are still split but have came together some with these settings. Car idles really good so I will be leaving it in closed loop. Car pulls hard all the to 6500 RPM, was going a little lean up top though and timing was still a little too high. I subtracted some timing in the spark correction vs's temp table, -4 degrees. Now it sits at 32 degrees at WOT, AFR is about 13.2

[EagleMark]

Nice!

Trying to figure out why you took spark out of Spark Coolant table? Should be set to 0 at warmed up...

Did you ever notice the lack of Stoich and O2 paremeters in $EE?