my new custom CAI and MAF

Megan370z · 01-30-2011, 01:35 PM

Quote:

Originally Posted by Jordo!

Great!

You may be stuck with a higher idle -- probably not much lower than 1K after adjusting. No luck just tuning the ECU map for it?

Wonder why it was pulling timing? Light knock maybe -- how lean was it approaching fuel cut?

Anyway -- great job!

after looking at the TB
there is enough adjustment on both screws on each TB to properly reduce the idle quite lot.
there shouldn't have any problem getting back the low rpm idle

as for the tuning with a lower idle ,,
no we didn't went too much in the tuning because the time was limited.
I did what I could but since I'm going back on the dyno in April ,
that will give me the time to fix those little details !

Quote:

Originally Posted by Jordo!

Wonder why it was pulling timing? Light knock maybe -- how lean was it approaching fuel cut?

!

previously before the Dyno I reduced the timing about 1-2 degree
it was getting close to 12.9-13.0 at 6800rpm in uprev which is about 13.4 on my WB

Jordo! · 01-30-2011, 08:51 PM

Quote:

Originally Posted by Megan370z

after looking at the TB
there is enough adjustment on both screws on each TB to properly reduce the idle quite lot.
there shouldn't have any problem getting back the low rpm idle

as for the tuning with a lower idle ,,
no we didn't went too much in the tuning because the time was limited.
I did what I could but since I'm going back on the dyno in April ,
that will give me the time to fix those little details !

Only reason I mention that is that idle speed is affected a lot by TB size, and there is some physically determined range that any given engine will idle smoothly at, which may nor may not be as low as stock with the new set up. Probalby more room to adjust due to VVEL, but no idea how the idle map affects that -- good luck!

Messing with the set screws may screw up TPS calibrations... just something to think about if you have to move things by more than very small increments.

Quote:

Originally Posted by Megan370z

previously before the Dyno I reduced the timing about 1-2 degree
it was getting close to 12.9-13.0 at 6800rpm in uprev which is about 13.4 on my WB

Hmm, not particualy lean for a NA car, but maybe a few 10ths of a point leaner than the ECU likes to see at WOT? I seem to be making best power on a steady 13.2 - 13.4 across the board at WOT (according to tailpipe sniffer, so not that lean in reality) with several extra degrees of timing down low through mid range, and only 1-2 over stock up top.

Megan370z · 01-30-2011, 08:56 PM

Quote:

Originally Posted by Jordo!

Messing with the set screws may screw up TPS calibrations... just something to think about if you have to move things by more than very small increments..

Im sure it will be fine because since its another set of Throttle body , we had to do a re-learn . once I close the gap in the TB with those screw , im sure its going to be alright.

Quote:

Originally Posted by Jordo!

Hmm, not particualy lean for a NA car, but maybe a few 10ths of a point leaner than the ECU likes to see at WOT? I seem to be making best power on a steady 13.2 - 13.4 across the board at WOT with several extra degrees of timing down low through mid range, and only 1-2 over stock up top
.

on my car its was between 12.7-12.9 on my WB (12.3-12.4 in Uprev)

Jordo! · 01-30-2011, 09:01 PM

Quote:

Originally Posted by Megan370z

Im sure it will be fine because since its another set of Throttle body , we had to do a re-learn . once I close the gap in the TB with those screw , im sure its going to be alright.

on my car its was between 12.7-12.9 on my WB (12.3-12.4 in Uprev)

Hmm. Not sure then. I'm convinced that maximum advance is seriously reigned in by VVEL. It's gotta be reading load differently or referencing some other look-up table that can't be accessed then. Hmm. Good luck -- keep us posted

Megan370z · 01-30-2011, 09:09 PM

Quote:

Originally Posted by Jordo!

Hmm. Not sure then. I'm convinced that maximum advance is seriously reigned in by VVEL. It's gotta be reading load differently or referencing some other look-up table that can't be accessed then. Hmm. Good luck -- keep us posted

I will update for sure once I get back on the dyno !!

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