Well recently i have upgraded to bigger primaries. I use to have the stock 550's and of course those are easy to lean out at idle etc at 100 percent for the injectors. Now i have 750 injectors from rc engineering and i was wondering if any one has problems leaning them out without changing any settings. I was wondering if anyone is using - lag with a lesser percentage on the primaries or can i get away with 0 lag and 100%?

 

100% is for 550. The % for 750 is 550/750 = ??? by the manual, that is how you do it correctly. Even this way you will need low or negative lag.

Trying to use 100% with 750 will be almost imposible as that is 36% richer!

 

You need to DL log ADVANCE and log the tranistion form PRI to PRI + SEC.
Then adjust trans % and ms for best transistion.

I detailed this a while bcak on this forum. Is part of my tuning notes package.

 

This is probably the easiest way I've seen this explained (not that I've read your other posts).