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View Full Version : Wouldn't it be easier to tune with PE mode deleted/disabled?



Supercharged111
March 14th, 2009, 11:16 AM
Since I don't have EFI Live in my posession and can't seem to get a stock L31 tune, I'm left studying the LS1 tune provided with the demo. Why is there a PE mode in the first place? Why not just put in the desired value in the "Commanded Fuel when in open loop (normal)"? The only way to have 100kPa at 5,000 RPM's is to be at WOT anyway, why have 2 tables to come to this conclusion?

mr.prick
March 14th, 2009, 11:35 AM
Do you want to command 14.63AFR @ 5000RPM and 20kPa MAP?

Supercharged111
March 14th, 2009, 02:04 PM
Aww, my stupid ass missed the fact that that table is ECT vs. MAP and not RPM vs. MAP.

mr.prick
March 14th, 2009, 02:25 PM
Give yourself a credit for catching my retort. ;)
There's always the COS option. {B3647}

Supercharged111
March 14th, 2009, 03:47 PM
Well it's not that I've never tuned before, I've just never tuned anything this complicated. I've tuned an SAFC, SDS, and tweaked on an Apexi Power FC which is all child's play compared to this.

joecar
March 15th, 2009, 08:52 AM
Even with a COS, consider this:

B3616 PE Enable is based on TP...

B3647 AFR is based on MAP...

MAP lags behind TP (you snap TP open, MAP then follows after some very short delay).

B3618 provides that initial "pump" shot.

For tuning, I set B3618 flat across at say EQ 1.17, and the last 3 columns of B3647 to the same value.

Supercharged111
March 15th, 2009, 11:16 AM
I'm also wondering where's the intermediate pump shot? All there is is a no delay PE mode that dumps only when you give it 90%? There has to be a pump shot below that or the thing would stumble badly off the line. I also can't find the PE timing adder. Or is that the fuel mixture spark correction table? My feeble brain can't comprehend another use for it.