You wanna be careful around your peak TQ, too much timing there is death .

I don`t have my laptop handy but this is what I started with . Usually I`m at 35 at WOT and 28-29 peak TQ (4000rpm)
If I`m running 5 blade props that have a ton of cup and load the engine I have button that drops timing across the board a few degrees.

https://cimg1.ibsrv.net/gimg/www.off...b0600404d8.jpg

What's your WOT boost PSI? Your blower looks like it can crank out about whatever you wanted!

About 8 psi is all I`m comfortable with.
With the 10-71`s that was 4% overdriven so it had a lot more in it for sure

[QUOTE=ICDEDPPL;4786881]You wanna be careful around your peak TQ, too much timing there is death .

I don`t have my laptop handy but this is what I started with . Usually I`m at 35 at WOT and 28-29 peak TQ (4000rpm)
If I`m running 5 blade props that have a ton of cup and load the engine I have button that drops timing across the board a few degrees.



Good call with the button. Would make good sense especially when laboring under tucked in conditions.

IMO, you should easily be able to run 34* at WOT with that combo, but like was posted, bring the curve in gradually with full advance at around 4800-5000 rpms

588 Blown
 

Damn that is some great information that for the great input.

Now do share what or powering. Sounds like it will be a blast!

588 Blown
 

https://cimg6.ibsrv.net/gimg/www.off...1a78550dd1.jpg
https://cimg0.ibsrv.net/gimg/www.off...9f7a43c19f.jpg

You need to expand you OSO horizon and get out of the tech section once in a while! lol
A lot of great updates going on in sub forums.
https://www.offshoreonly.com/forums/...u-approve.html

Are you having issues keeping those Gaffrig mufflers clean and not tarnishing? I have had a he!! of a time. I'm sending them out to be professionally polished and then going to try a high temp ceramic coating.