Offshoreonly.com - Fastest Formulas

Offshoreonly.com (https://www.offshoreonly.com/forums/)

- Formula (https://www.offshoreonly.com/forums/formula-36/)

- - Fastest Formulas (https://www.offshoreonly.com/forums/formula/339297-fastest-formulas.html)

Quote:

Originally Posted by 40gt (Post 4820292)

Well we did the first sea trials today.
Only idled out for like 10 minutes and the starboard engine misfired and stalled.
Could not restart it.
Went home on the other engine.
At home started both engines again - seemed fine.
Let them idle for ~ 10 minutes. Oil pressures and temperatures fine.
Headed out again, only got a couple hundred meters and there was a bad knocking sound in the starboard engine.
Shut it down and went home on the port engine.
So ........... not sure what the forward plan of attack should be from here.
Frustrating really.

Sounds like water got into it. Did you do a leakdown before putting them in? Do one now.

Quote:

Originally Posted by JRM (Post 4820440)

Have a 353 Fastech with 565's and can only get 82. Not nearly fast enough. Looking for performance upgrades but can't seem to find anything for the 565's. In hindsight, I wish I went with the 525's as I could have thrown a set of Whipples on them.

I am working on a solution for the drive by wire setup now...just trying to see what will be easiest for a blower as there isn't a ton of room in the engine compartment. The 565 is the ticket over the 525....bigger motor, bigger valve, more power. The drive by wire...I'll never go back to cable.

In the meantime, what props do you have and what is your RPM at 82mph? My boat with 540s was setup with 29p Maximus and I only achieve 4950rpm. I don't have enough motor to turn them. I see 80 easily, 82 is my best. I just bought some different props and as soon as our water is liquid again I'm going to test and I'll pass that info to you to see if I get more RPM and speed. I'm betting you have the same props I do.

Quote:

Originally Posted by JRM (Post 4820440)

what year is your 353?

Quote:

Originally Posted by whistler (Post 4462632)

It still amazes me how quickly I got comfortable going 80+ after owning a 21'r that only went 50. I'd feel safe in my 382 at a 100+. It's the most solid go fast boat I've ever been in. Now that premium is less then 2.50 we go fast a lot more often.

I miss those days

I saw a 382 with vortech blower and Arnesons on one of the FB groups last week. Guy said he hit 102 and felt he had more.