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Formula 271 Sr1 Possible engine swap

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  • 1 Post By Monaco20

Formula 271 Sr1 Possible engine swap

Old 11-20-2019, 04:22 PM
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Default Formula 271 Sr1 Possible engine swap

Been a while since I posted anything at the Formula Forum ,)
Still have my Formula 271 SR1 496 HO, my old XR drive was broken and I changed to a Bravo1X drive 1.50 ..
So this summer I saw 64 mph at my Garmin GPS under ideal conditions spinning my Mirage+ 23`, not so bad
for an old 271 SR1... The owner before me, who did the total rebuild of the boat by the way, told me that he lifted
the hight of the drive a bit.
I do not know how much, if some one have an original 271 SR1 could be so kind to meassure from the bottom of the boat to
the Bravo Transom it would be very helpful ::: Then I would know how much higer my drive is set …

I have heard that Formula original is very conservative with drive hights..

I am consider to swap the 496 to a total rebuild 500 Efi dynoed @ 530 HP. ,)
Anyone have any experiance with the 500 EFI in a 271 Fastech or SR1 ?
What kind of top speed and crusing speed could be realistic
I hope the +105 hp should give at least 70 mph ++ ?
My only concern is that the 496 HO is a very good engine, and also the fact that it has closed cooling is big advantage …
My boat are in the water the whole season… I have installed the posibility to flush the engine …

I will appreciate any comments and tip

Br
Rune

Out of the water after my 502 545 HP racing engine broke... Installed the 496 HO ;-)
masi242 likes this.

Last edited by Monaco20; 11-21-2019 at 07:26 AM.
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Old 11-20-2019, 05:40 PM
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Beautiful boat, the 496 is a great engine. If I could swing it that would be my first pick. I like oem stuff where most people like the built to the hilt stuff. Good luck with your 70 mph goal.
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Old 11-21-2019, 12:15 PM
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Originally Posted by Alwhite00 View Post
Beautiful boat, the 496 is a great engine. If I could swing it that would be my first pick. I like oem stuff where most people like the built to the hilt stuff. Good luck with your 70 mph goal.

Thanks for the reply
If I go for this one, I hope to get there ,) Pic before rebuilding
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