That is what I thought too 670 lbs of torque at 3700 is not to shabby. I know how this works in a car but how does this torque work down low with an outdrive? Will this benefit in getting the boat up on plane quick?

Boat motor or tractor tailer? Lol

I just picked it up and they used 1 3/4 primary tube headers on this so the exhaust was crap. He also told me to go down one jet size all the way around.

I've seen some AFR headed 540 combos here on oso, that didn't make that kind of low end torque , with smaller CC heads, and smaller cams.

Are those heads using the stock 2.19 intake valves?

Certainly. It should be a nice combo for a 30ft single engine boat. Some larger headers would have helped , esp in the upper rpm band. 1.75 is small for that build.

I think your cam guy did a good job. I'm sure most were thinking, that cam was way too big, and not enough split, but I think it could have used a bit more cam. Hence why I said it will make more TQ, than HP.

This should be Getherdones favorite build. But he`d use a smaller cam for even more TQ .

They are 2.25 now. The cam was reground by this guy my machinist uses in socal. He has reground one of my solid drag race cams but I have not used it yet as the clay smith I had custom ground works so much better than the Erson I had in there. Good people over at Clay Smith.

I know everyone talks about HP numbers breaking outdrives but what does high torque down low do to them. I will state I am not planning on hole shots and abuse on the outdrive. I have already bought a spare one just in case.

Well I was within 1 hp but off with rpm. I woulda though even advanced 2 deg it woulda peaked out higher. Nice build

Hey now....

It is kinda funny though when your think of a tunnel ram 565 with 236/244 much smaller than 252/252 yet pulls peak hp at 6k. Port velocity??? Valve timing??? Wonder what OP's peak hp woulda been with some 315/325 worked over heads with 2.30 valves.

Btw I did end up with cams that even make yours look small. Lol