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-   Fountain (https://www.offshoreonly.com/forums/fountain-37/)
-   -   How is fast 29 fever 96 twin 502 MPI ? (https://www.offshoreonly.com/forums/fountain/247947-how-fast-29-fever-96-twin-502-mpi.html)

Quebecfountain 02-22-2011 06:46 AM
Originally Posted by A.O. Razor (Post 3332030)
1. You need to check the drive ratio. 1.5 or 1.36.

2. That boat with stock power will NEVER run 90 or even 85. A 32 with that power is around 72-74 stock. In other words. BS!

3. Even with a 1.36 ratio and the engines spinning @ 5100 with a 25, slip would have to be 4%, no way. With a 27" @ 5000-5100 and 10-12% slip, that could run 85, IF the drive ratio is 1.36. If the drive ratio is 1.5, you would need a 30".

The 28" props and 75-78 tbrown stated, sounds bang on.
I dont know at this moment the ratio of the drive,, How i can check this? with the serial number i think? if it dont rebuilt maybe,,
Who is know that origine ratio on that boat,, if the boat have 454 stock before? it's different or optionnal?

But if is a 1.36,, your slip exemple is in a salt water or fresh water because i know is faster in salt?

Quebecfountain 02-22-2011 06:47 AM
Originally Posted by US1 Fountain (Post 3332415)
Yep. My '99 will touch 76-77 if the stars are aligned right, but a 74 ride ever day. Larger step though. Gain??????

Those prop,rpms and mph numbers didn't add up. But if that's what the seller said, then...... :party-smiley-004: I'd guess a speedo reading
Do you have twin big block in your 99?

Quebecfountain 02-22-2011 07:16 AM
Originally Posted by PARADISE ISLAND (Post 3332438)
I whould guess a 29' is faster than a 32&27' just a guess 2x502 in a 29' I could believe 80mph:cool:
And victory racing install this engine,, and i guess he reprograming the computer for exaust modification,, i guess but i dont know,,

US1 Fountain 02-22-2011 10:46 AM
Originally Posted by Quebecfountain (Post 3332740)
Do you have twin big block in your 99?
Yes, 502MPI's

Quebecfountain 02-22-2011 12:29 PM
Originally Posted by US1 Fountain (Post 3332948)
Yes, 502MPI's
Do you run this speed in salt or fresh water?
And what is your props size?

And this question is offtopic,, but why you change your 29 for 32 ? i think is because you have more space on 32 feets,,

Thanks

US1 Fountain 02-22-2011 01:23 PM
Fresh water use only. 26" hydromotives

Don't understand the 2nd question.

Quebecfountain 02-22-2011 01:42 PM
Originally Posted by US1 Fountain (Post 3333080)
Don't understand the 2nd question.
Excuse me,, i dont look you have a 32 feets,, not a 29 feets,,

Quebecfountain 02-22-2011 01:44 PM
Originally Posted by US1 Fountain (Post 3333080)
Fresh water use only. 26" hydromotives
And ho,, what is your drive ratio?

Roger 02-22-2011 03:13 PM
I have a 1995 29 with twin 502's. It was tested at the factory at 88.2 and the most I ever got it up to was 87.8 on GPS. It now runs 93-94 with rebuilds to 509's and 575 HP.

GRH 02-22-2011 03:17 PM
I owned a 95 29 with 454MAG EFI's(385hp)... Gill offshore exhaust & it ran on the limiters in fresh water with 27 labbed Hydromotives QIV's 81 and a "click" on GPS.... for years! no faster no slower... for what its worth...


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