Well last night I fired it up finally on my old 355 tune, it ran lean as expected but still stayed mostly 14.7 at the WB despite the 150-160 blms.
Now so far all I have done is changed the cylinder volume from 713 to 827 and also as I expected it brought most blms within range. (124-132)
Also added some PE vs RPM fuel due being 14.8 under hvy load.
But I seem to have picked up a slighty popping through exhaust
at idle and was not sure what would cause that. any thought?
Timing is floating 20-25 at idle ,cam is 230/230 560/560 110 lsa.
Would it be the cam purging raw fuel at idle and burning in the exhaust? Would more timing eliminate this maybe?

Also I still get a slight bucking under cruise around 2000-2500
Spark is around 36 degres there and of course Blms are good .

I hate to ask q's about something I have not myself even tried to trouble shoot, but I figured someone might have a quick answer to make this easy.

Well Im off to tune also,thx for any help.

 

Also I still get a slight bucking under cruise around 2000-2500
Spark is around 36 degres there and of course Blms are good

that much spark advance could cuase some missfires.

Timing is floating 20-25 at idle ,cam is 230/230 560/560 110 lsa.
Would it be the cam purging raw fuel at idle and burning in the exhaust? Would more timing eliminate this maybe?


try to clamp it at 20btdc.

 

Ok ill try reducing timing at cruise but I just tried a quick ride with it advanced some and I thought it was a little better.

And Idle is set in the prom at 20 but gets its 4.9 from the spark@ idle vs coolant temp.