Don’t worry about hi jacking the thread, I’m learning too!!

power looks pretty good. I don't know why he did 600rpm a sec. it would be nice to see o2 reAdings I see BSFC is very high on the top end may be power there if it's that Rich.

He did not have the ability to hook up o2 sensors so I’ll have to fine tune the rest out in my boat! Still happy with the power for the cubic inches though so far!! 3* timing was worth 50hp!

be carful tuning for power with timing especially dynoing it at 600rpm a second. Watch how far down the ground strap it burns. There is a big difference at 600rpm to 100rpm a second. What heat range plugs you run on dyno?

Ground straps still showed it would have probably taken more timing than we put in it, started at 29* and could hardly tell the tip of the strap was colored then I slowed the blower down and took 2 jet sizes out of front and back of both carbs and made a second pull, it picked up tq and lost a few ho but still had a flat spot around 5800rpm so I bumped timing up to 32* and the motor pulled cleaner and sounded a lot better still shows timing mark before the elbow on the ground strap but that pull picked up another 10tq and 50hp and had a nice smooth power curve with no dips or stumbles so I left it there plan on checking plugs and air fuel ratio once it’s in the boat?

That’s first pull at 10% overdriven with 29* timing and 82 & 86 jets