29 Fever 525HP Mod Info
I have a 04 29ft Fountain Fever powered by the Mercury Racing 525HP with the XR drive turning a 4 blade 26p prop. Only gas 180 hours on it. I'd like to get the boat into the mid to low 80's. Was looking at the Hardin Marine Stage 2 Upgrade for Mercury 525 EFI. Just wondering if it's worth the $2k or save a little bit more $$ and put a whipple on it for an extra $4k. Just skeptical with long jevity with installing the supercharger. Also wondering if doing a prop change to a herring 5 blade?
Thanks for any help or input!! |
You need 20-25hp for 1mph increase. What's your current speed?
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I'm currently running a solid 78mph right now. The stage 2 kit claims that it increases the maximum power by more than 35HP* and 38 pounds of torque*.
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Originally Posted by Mtb_05
(Post 4451118)
I'm currently running a solid 78mph right now. The stage 2 kit claims that it increases the maximum power by more than 35HP* and 38 pounds of torque*.
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If he is a 1.5 gear in the drive and a close to stock b1 26 pitch the number work out if he is spinning it close to the limiter.
Just saying |
Originally Posted by indysupra
(Post 4451167)
If he is a 1.5 gear in the drive and a close to stock b1 26 pitch the number work out if he is spinning it close to the limiter.
Just saying |
My Gps speedo recall must not be working properly then?? I run 72 all day with full gear, 4 people and 3/4 tank of gas.
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Originally Posted by Mtb_05
(Post 4451194)
My Gps speedo recall must not be working properly then?? I run 72 all day with full gear, 4 people and 3/4 tank of gas.
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I know the Fountain advertised top speeds are, shall we say, obtained under optimal conditions but the ads claim the 525 equipped 29' will hit "close to 80." My 29 Fever with twin 6.2s is advertised at "close to 74." I've seen 70.5 GPS - slack tide - with 3/4 tank of gas, chain in the anchor locker and water in the tank and ports-potty, boat full of regular gear. (1:65 Bravo drives at 5300 r.p.m.s - I would guess my boat would hit the limiters - and/or run out of h.p. before it would hit an honest 74.) I can see no reason why a 525 equipped boat would not hit 75. Mob_05 claim of 72 with full gear and 4 people seems right to me as I hit about 67 under the same circumstances.
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Best I have seen in my non stepped 27 with a 525SC (balanced, 060 over, 9.0:1 MSD ignition and 5psi boost) is 75mph on Livorsi GPS with light load. -2 Imco and 24" P5X 5450rpm. No dyno, but guesstimate is 550hp.
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