Yes and No..lol I dyno'd them when the solid cams were first installed and I had Merlin heads and it made 838HP/834ft lbs. After installing the AFR's and making zero changes I pulled 300 more RPM so I guestimated they had to be making somewhere in the 875-900hp'ish range with the AFR's. Last year after building them, I dyno'd the new combo it made 964hp/924ft lbs. Both dyno's had full accessories but they both used dyno headers so they're probably 10-15 hp less in the boat if I were to guess. When someone asks, I tell them they're 950's. I wish I could have run both engines on the same dyno but I moved and it was too far of a drive to go to Long Island.

One other thing I wish I could have done was get some numbers with my methanol system but the controller box took a dump as soon as I hooked power to it on the dyno. I went to hook up the Meth after making af ew pulls and a puff of smoke came out of the box (F me, right?)

However, the boat ran 94.5 without Methanol turned on and ran 95.4 with the methanol activated. I also saw a 2 point "increase" in AFR as soon as I switched the meth on. It was a pretty neat test!

One last thing. The new setup is MUCH louder.

First video is the old cams and going past my friends house two years ago and picking on my buddy in his Donzi.
https://youtu.be/eGcRlETHGU0

This is from the same location and the new setup. Too bad I wasn't laying into it!
https://youtu.be/s8sK-h6-XzI
https://youtu.be/RC1d61uuysk

Wow, I stumbled across this thread doing a search and two hours later I was done reading the 683 posts. There is some great info in here!

I know much less than most on this thread. But, I can comment on the 1.8 vs 1.7 ratio rockers. My Innovation Marine 500EFI had a cam similar to a 731, but with a 4/7 swap(496 cam). If I remember correctly it was .598/.610 lift. They used the 1.8 rockers to get more valve lift while still being able to use the stock GM roller lifters with the dogbones. I believe someone touched on this earlier, and I think this is a reason the 1.8s are sometimes used.

HaxbySpeed your pm box is full. trying to contact you.
r,

Eric

he last logged in here in 2018

F-2 Speedy,

I did see that but, hoped he might reply.

r,

E

Here:
About Haxby Speed & Marine | haxbyspeed.com

SB,

Thanks, i'm sure like most shops he very busy this time of year.

r,
E

what are you needing done, there are several good marine shops closer to you than Canada