Initial fuel trims before 1st log?

[jking29]

I could really use some recommendations for my fuel trims before my first log. I just got a logger and am installing a Walbro 190, 2g mas, and 550's. I know the 2g mas and the 550's are supposed to be a pretty good match, just not sure how much I should adjust my trims before I make the first log. I really want to get a little bit of tuning experience before my b16g shows up.

 

[dedlewamp]

You'll want to keep your trims around 100%. You can check out RRE's website, any they have some info on setting the low settings. Anything above 100% is lean, and lower is rich. Do you have a AFC?

 

[jking29]

Yes, its a Pivot ACS. It has +/- 10% @ 1600, 3400, 5200 and 7000. Its imported from Japan but the instructions are also in Japanese. Bought it cheap and its brand new, so I'm going to see how well it works.