Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   Formula (https://www.offshoreonly.com/forums/formula-36/)
-   -   Formula 311 vs 357. What to look out for? (https://www.offshoreonly.com/forums/formula/335006-formula-311-vs-357-what-look-out.html)

MericaboaterSR1 03-01-2016 09:25 PM

So it's gonna take 500 hp per side to see 70. And around 650-700 a side to see 70 on a 357? What does a stock 420 have in it

MericaboaterSR1 03-01-2016 09:26 PM

And full force define minimal? You say there is a minimal difference in fuel usage verse the two

Mr Maine 03-01-2016 09:56 PM


Originally Posted by donzi matt (Post 4410374)
Mine saw 70 on GPS with 420's with roller cams. TRS drives also. On bone stock 420's, one with 600 hours, it ran 68. Mr. Maine bought it, piped through the silent thunder exhaust straight and ran 72 as I recall.

Yes, I could always hit 70, sometimes a bit more, 71, 72 depending. I only do gps, and a 2 way pass to a count for wind, tide. There is no reason for me to make up numbers

payuppsucker 03-01-2016 10:02 PM

Merica, buy the biggest boat you can comfortably afford and grow into it skill wise. If not you'll be shopping again next year. If you've been on boats most of your life you be just fine.

payuppsucker 03-01-2016 10:10 PM


Originally Posted by MericaboaterSR1 (Post 4410388)
So it's gonna take 500 hp per side to see 70. And around 650-700 a side to see 70 on a 357? What does a stock 420 have in it

My 303 runs just shy of 85 with 675 x 2 to give you something to compare.

donzi matt 03-02-2016 08:36 AM


Originally Posted by MericaboaterSR1 (Post 4410388)
So it's gonna take 500 hp per side to see 70. And around 650-700 a side to see 70 on a 357? What does a stock 420 have in it

In my case it took 450 a side to run 70.

A 420 is an all forged 454, rectangle port heads, crane cam, crane gold rockers, Weiand single plane manifold (some had GM manifolds), Gil exhaust (early ones had an awful Mercruiser exhaust), and a Holley carb. They were a good running motor for the time. My motors went to 500 hours on one (lost an oil line) and 600 hours on the other (cracked head). The bottom end on the 600 hour motor looked great.

slugoslugo272 03-02-2016 09:21 AM

One thing to note about Formula they aren't the fastest boats but they handle the rough water great and you see many of the older boats still around and looking good which speaks of the quality of them, I purchased a 90 sr-1 272 a couple years back and love the boat but do wish I went a little bigger. I don't do it often but if you spend a weekend out on the boat it's nice to have that extra room so my advice would consider how you are going to use the boat. Day trip then the size doesn't matter as much.....

MericaboaterSR1 03-08-2016 06:00 PM

I guess will have to see how this goes. Cant wait to start looking. Had a rough winter (didnt plow much) so got more bills then i want now. But once the spring kicks up and i pay those off, cant wait to start looking. Already found some decent boats on the internet. Also it would be nice to meet up with some of you formula owners at put n bay before i make a final decision.

https://rochester.craigslist.org/boa/5480844728.html

http://www.pier45boatandauto.com/198..._259400478.veh

I heard peir 45 was a pain in the ass to deal with lol

https://newlondon.craigslist.org/boa/5480520808.html



This one looks kinda rough:
http://miami.craigslist.org/pbc/boa/5431664790.html

Cant wait to start seriously looking :ernaehrung004:

Fischan 03-10-2016 02:54 AM

Do you have a color preference? I'm always looking at boats that are for sale, very tough habit to break! I can keep an eye out.

Fischan 03-10-2016 03:24 AM

http://m.powerboatlistings.com/view/37049

http://m.powerboatlistings.com/view/38596


All times are GMT -5. The time now is 10:15 PM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.