85 272ls. 54mph
#1
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85 272ls. 54mph
Trimmed and as far as the throttle will go, can only go 54 at 3400rpm. Twin 350. 3 blade knifed props, not sure what the pitch is. Shouldn't I have more left to go?
#3
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Either your tachs are both wrong or you are way over proped. That speed at 3400 sounds like 23" props....and at 3400 you are just getting into the peak of the torque curve. Check the last 2 digits on the part number...thats your pitch.
#6
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Not really any serious harm in the short term...but you are for sure burdening the engines. Just for comparison...my 255 w/twin 350 Chevys, which is very close in size and weight as your 272 is turning 4300 RPM at 54 MPH and 5100 at 62~63.
I'm running 19" pitch and should be running 21"....I am slightly under proped....I keep my RPM at a max of about 4700~4800 by backing off.
Take a look at those props and let us know what you are running. If you are running Alphas with 1.5 gears your numbers should be close to mine.
I'm running 19" pitch and should be running 21"....I am slightly under proped....I keep my RPM at a max of about 4700~4800 by backing off.
Take a look at those props and let us know what you are running. If you are running Alphas with 1.5 gears your numbers should be close to mine.
#9
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OK...(the math still works) your running a 23" pitch...way too much prop. I'll bet your 27 is a pig out of the hole...especially with a load.
See if someone local can hook you up with a pair of 19" on loaner (even if they're aluminum) to see where that puts you.
I'm guessing your optimum is going to be a Mirage Plus Stainless in a 19" pitch.
What part of the country are you in? Check craigslist in your location and search under boats for "prop" in "title only".
See if someone local can hook you up with a pair of 19" on loaner (even if they're aluminum) to see where that puts you.
I'm guessing your optimum is going to be a Mirage Plus Stainless in a 19" pitch.
What part of the country are you in? Check craigslist in your location and search under boats for "prop" in "title only".
#10
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Join Date: Aug 2010
Location: Tacoma, WA
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Hey Sprink do you think you can send me an email at [email protected]. I have a few questions regarding your boat and time spent around the Formula Miami facility.
Sorry not to thread jack.
Sorry not to thread jack.