Tired of being passed

[RC65]

These guys are local to me and I've used them in the past for custom cams.
They also know they're stuff on marine cams.

[Quik Fix]

Karen, what engine do you have?

[Mako2]

Ludicrous speed? Where did I hear that before?

[Fisherlady2]

Think 'Space Balls'.... Lord Helmut....

[Mako2]

Musk’s favorite movie. He talks about the movie and Ludicrous speed often.

[GREGK]

Take your Ludicrous speeds, Jerry wants Plaid, Plaid is faster.

[S0uthernrebel78]

S. rebel. Thats what I'm talking about. What has been done to your 383? What boat do you have, exactly. Tower, enclosure, outriggers, etc. I would love to cruise at 25 Knots, or even 25 MPH. Positive proof it can be done. I actually had a long talk at the engine shop today. Take my 383, FI, aluminum heads, custom grind cam, higher compression and I will have what I want. My 351 is running perfectly so I won't make the switch til winter, but its going to happen.

Fairly plain 383 with a 600cfm Edelbrock carb, i stripped the bottom over the winter and barrier coated a long with new Pacifica plus bottom paint. I have a over built aluminum hard top that is not the lightest or most aerodynamic thing. There is 600’ of 1/2 rode in the bow along with a few hundred lbs of tackle and tools on board, i do not have any canvas on the boat and there is a set of 18’ Lee jr wishbone style riggers

[Fisherlady2]

Beautiful!

[S0uthernrebel78]

Thank you There was a lot of hard work this spring, coming up this winter is a full redo of the topside

[Quik Fix]

Except for the enclosure and the tower, the same boat. With my 383 in my 26 I ran 30 MPH wot. Cruise was about 22 and that was most likely at 3000 RPM. I'm going with the aluminum heads to get the higher compression and burn the 93 octane fuel. Longer burn, longer push, more power. Also less weight. FI also as long as I'm doing it. No tuning and carb guys are hard to find. Also better fuel economy. Just leave the cam to the engine builder. Thats what he does. I told him what I want, he says he can deliver. Will have it dynoed. Bringing him my engine this week.

[S0uthernrebel78]

I just ran 48 miles round trip and trolled for 41 miles with 3 people and all my gear plus 250lb of ice. The average speed running was about 22knots at 3-3100 rpm and trolling was around 5knots, ocean conditions were 3-5’ ground swell from Isaias total fuel burn for the day was 35 gallons. If i remember correctly 26 gallons for running and 9 gallons for trolling

[Quik Fix]

Thats more than I burned. I think you are into the secondaries more than I would have been. I cruised at 22 MPH and burned 9.5 gph. We will see. I need an engine for my PH project anyway. My 351 will go there.

[S0uthernrebel78]

Being I am currently over wheeled I know the motor is burning more fuel than it should, Im hoping the wheel i am having worked up now will be better and allow the motor to really run as it should. I’ll post my track and the data for the last trip

[Fisherlady2]

Karen, what engine do you have?

Chevy 5.7 FI, PCM conversion. 330 hp. Excalibur 330

[GREGK]

Jerry
talk to your guys about an LS. That’s what those 600HP egg beaters have. The LS platform stock, out of a junkyard with China turbos are holding together with 10 psi boost pushing out some great HP. Google them.

[GREGK]

Chevy 5.8 FI, PCM conversion. 330 hp

I think they are 5.7’s. That engine pushed my 246 at 31knots wot.

[Fisherlady2]

Yep, you are correct, wrong vehicle in my head when typing. It is the 5.7, with the PCM Excalibur conversion

[Quik Fix]

GM engines turn up a lot more than my 351. The faster you turn the prop, the faster ya go.

[Fisherlady2]

I know when we repower (which should be in 4 or 5 years) I am looking for the same or very similar engine. Very happy with it.

[S0uthernrebel78]

also I ran another 9 miles before i fueled the boat up the next day so it was really 90nm total burn of 35 gallons

[GREGK]

Ed
I think Jerry wants your secret on record 67 kts. How stable was she at that speed? LOL

[S0uthernrebel78]

That wasn’t on the Shamrock haha, think I accidentally turned on the track one day in the truck

[My My Hey Hey]

I would look at the prop and gear. With a power increase you might have to change a few things. Now you get into prop clearance, shaft size, and reduction ratios as well.

Is there a formula for all of that Ed?

[gary s]

Surplus gas turbine and an Arneson drive or a couple of sheets of plywood for the transom and 2 627 Seven Marines