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Wow, I wonder what’s wrong with Monaco’s boat? 425 hp only gets him to 63.6. That’s pretty good for a 5300 lb. boat. Maybe he should get a gps like yours. I dunno
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I have a livorsi gps speedometer. Plenty of people on here with the same results. Jeff wurl
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Originally Posted by jwurl
(Post 4656361)
My box stock 502 magnum 415hp fastech 271 would run 68 mph on gps with a 28p labbed bravo one prop . Jeff wurl In boating magazin they testet the 271 Fastech with that power together with a lot of other boats, top speed 63 mph The distributer of Formula in Europe got 72 mph 271 Fastech with a Merc 525 ( They know what they are doing by the way) Your results are amazing I whish I could bee close ;-) I dear you all who have a 271 SR1 or Fastech who does more then 63 mph (GPS) with 496 HO stock 425 or 502 Stock 415 hp, to post a photo of the speed achived Jeff I do not doubt your word, its just an amazing result, who labbed your propp ? https://cimg2.ibsrv.net/gimg/www.off...fa3a3ac5d7.jpg The weight on the 271 dry are 5600 pounds |
You are making great speed for the weight you are pushing with the power that you have. And Formula stability never hurts. Fine tuning and reliable parts make Jack a happy boater. Nice boat Monaco. |
Here is a snippet of test results from boat magazines for the Formula 271's.
I almost bought a new 271 but the speeds quoted to me by Formula and the local dealer turned me off. I was told 68ish with a HP525. https://cimg9.ibsrv.net/gimg/www.off...6357bdca6d.jpg |
Originally Posted by dbkski
(Post 4656682)
Here is a snippet of test results from boat magazines for the Formula 271's.
I almost bought a new 271 but the speeds quoted to me by Formula and the local dealer turned me off. I was told 68ish with a HP525. https://cimg9.ibsrv.net/gimg/www.off...6357bdca6d.jpg it is mot very big differanse between the stepped hull and the normal V bottom. You should have bought the 271, its a great boat ;-) With the 525 the 271 fastech does 72, what is very interesting is the result with the Ligenfelter modified engine 540 HP it does 75,9 mph on the radar, and its an SR1 V bottom, this is a very good result, the boat must have been tuned in perfectly …. I have this test somewhere and I will post it here ;-) ;-) https://cimg2.ibsrv.net/gimg/www.off...fbe3770cbb.jpg Out of the water after my 502 545 HP racing engine broke... Installed the 496 HO ;-) https://cimg4.ibsrv.net/gimg/www.off...061c652c57.jpg 503 545 HP dynoed https://cimg8.ibsrv.net/gimg/www.off...3e714a41d3.jpg 496 HO |
Ligenfelter 271 test
https://books.google.no/books?id=M1H...felter&f=false Singel engine sport boat test https://books.google.no/books?id=Z-v...20test&f=false |
Originally Posted by jwurl
(Post 4656361)
My box stock 502 magnum 415hp fastech 271 would run 68 mph on gps with a 28p labbed bravo one prop . Jeff wurl GPS said 67 |
Originally Posted by oconnor marine
(Post 4656901)
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Would it be possible to show the 312 with 502s ? The picture is cutting off the 502 section. Also the 252 which I had hit 55 mph with gps, so you can really go by this chart IMO. |
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