pHEnomIC

iTrader: (14)

I have my tune dialed in fueling wise better than it's ever been before. I was able to get the VE dialed in +/- 4 and the MAF +/- 2%. Car drives phenomenally.

I am having some issues low rpm when I hammer the throttle in 2nd and 3rd gear. My fueling appears to be dead on but it is not making much power.

I am getting 13.0 a/f across the board wot and 26* advance.
Is this too rich for those low of rpms? What else can I try?

MontecarloDrag

iTrader: (3)

Those kind of stumbles are usually timing related
However, even if fuel is dialed, all engines need a lot of fuel in rapid throttle transitions like idle to wot. Think of it like a carburetor's accelerator pump
If the engine does not get enough fuel it will stumble. Combined with a timing curve not properly dialed will make the hesitation much worse

pHEnomIC

iTrader: (14)

Ok it looks like the timing is like 16* +/- around that w/ fueling 12.7-13.0. Once it goes through the low rpms the timing goes to 25s and it takes off.

Should I just set the timing aorund 25* all the way through there or is there a reason it is so low.

Also, In the low rpms in 3rd and 4th gear if you floor it, it sounds almost like its knocking. Drives perfect everywhere else though.