I would say my boat spends most of its runnng time between 3-3,500RPMs but I do idle around as well. WOT pulls I do run to clean it out but short blasts never for more that 30sec or so. As mentioned prior I am going to be switching over to Holley HP since I have it all sitting in boxes in my house I just want to enjoy the summer and tear into it come fall. It already has the EFI intake on it but I plugged the injector ports with aluminum injector blanks, so all I need to do is remove the carb and bolt on the 1,000CFM TB.
So I don't want to get another ignition box, I rather just let the distributer control the timing for now until i switch over to EFI. I have another distributer, ignition box, coil and fuel pressure regulator I have to swap over too as well.

I guess play it safe if you see figure D, I switch to the 2 light blue springs and the green bushing stop I can set base at 12 and a total of 35 just after 3K. Right now it has the factory 2 heavy springs and blue bushing stop.


This was taken on the first test run with the new engine so dont kill me on the not neat wire. its neatened up since then LOL

1 have 575hp .red bushing 2 heavy springs . idle 14deg 3000 34deg 850 holley . 5200rpm wot. so I run a af box . at 3000rpm 13.5 af at wot 12.6 af . 34deg is safe 4 year running good . you have to prop boat so the rpm are at the max rpm.wot.proping the boat at wot put the motor in the power band, give you full hp. if you look at stock 502 on air cleaner it will have wot 4800rpm to 5200rpm and that's what they prop the boat at. I try all the bushing and springs for me this set up work the best for me' I have a 24 Baja 582 800hp red bushing 2 heavy spring.34deg at 3000. boat prop at 6000rpm 90mph . if your motor was dyno you will see the rpm number at the most hp the motor makes.my boat prop to go 6000rpm .

I just installed an innovate wideband in the boat so I can watch AFR and jet the 850 Holley as needed. My engine was never on the dyno but guesstimate is 550hp. With a 22P 4blade it will run up to 5,500Rpm and hit the limiter and run 62ishmph with the factory timing curve. I tossed on a 26p 4blade and it didn't like that wouldn't pull past 4,400rpm and ran 65mph but farted back thru the carb when coming up on plane. I think the lack of timing made it to rich and causing it to stumble. I think this boat will be happy with a bit more timing and a 24p 4blade prop so that's my plan for now.

I would assume optimizing the timing curve and AFR could net me another 50-60Hp im sure it was down on power last season.

the 26p prop is no good you aren't in power band!the 24 p will be better. you need to run the boat 5200no lower than 5000rpm then run the boat at 3000rpm see your af is jet the front jet around 13.5 after that run the boat wide open. then change the jets 12.5 on .no lower then 12.5 it will be to rich

I had my motor on Dyno .12.3 change the back jets 2 size got 45hp more . I am 12.6 now

https://www.youtube.com/watch?v=2KojmLUDThere my boat with 700hp

Says the video isn't available.

try this youtube bob boat doing 80

bajabob picture 090 - youtube google this me racing super charge waverunner