502's in top gun
06-19-2005, 08:05 PM
#11
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Re: 502's in top gun
Originally Posted by VI Mike
What? This is how Cigarette lets their boats leave the factory? Porpoising at the top end?
06-19-2005, 08:34 PM
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Re: 502's in top gun
Originally Posted by pm203
Mostly underpowered non-step Bravo Guns porpoise depending upon water conditions.
06-20-2005, 06:35 AM
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Re: 502's in top gun
Originally Posted by pm203
Mostly underpowered non-step Bravo Guns porpoise depending upon water conditions.
06-20-2005, 09:25 AM
#16
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Re: 502's in top gun
The bottom of these boats were designed when the boats used TRS drives.Because of the transmissions,the motors and weight were more forward.When the Bravos came out,the weight distibution changed,and so did the ride.That is what I am told.I had the nicest 2000 Topgun out there (Lip-Ship half-cabin with the new T/S lighter layup and 500 EFIs that ran 78-79, and in certain conditions,that boat porpoised.The only way to correct it was to tuck in the drives and give it some tab.
Last edited by pm203; 06-20-2005 at 09:29 AM.
06-22-2005, 10:38 AM
#17
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Re: 502's in top gun
So a Bravo drive non-Kevlar conventional hull with a full cabin should put more weight forward and possibly ride better than a lighter cover girl cabin with Kevlar ? yes/no ?
ed
ed
06-22-2005, 06:50 PM
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Re: 502's in top gun
my 92 with 502/ 420hp bravo's ran 64. i never had problems unless you over trim. went to 600's low 70's no porpoise, 700's ,imco lowers 1 inch shorters lab 28"s gps says 81.5 i still don't get any porposing
06-22-2005, 07:12 PM
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Re: 502's in top gun
Our 95 w/3A's/600SCs & full cabin porpoises. I haven't had much time to dial it in and it "could be" user error 
but we ran it for two straight days in Havasu (lake/flat water) and I had to run tab to get it to stop porpoising. You just can't run the big non-stepped boats "drives out/tabs up" like you can smaller or stepped boats. I would think you would at least need to run tabs even. There's a sweet spot, but like I said, I haven't had time to dial it in 
Hopefully soon.....
but we ran it for two straight days in Havasu (lake/flat water) and I had to run tab to get it to stop porpoising. You just can't run the big non-stepped boats "drives out/tabs up" like you can smaller or stepped boats. I would think you would at least need to run tabs even. There's a sweet spot, but like I said, I haven't had time to dial it in Hopefully soon.....
06-22-2005, 07:27 PM
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Re: 502's in top gun
my 93 tg has merc.425's with trs's and full cabin, it has a sweet spot too, but it still has porpoising problem unless dialed in. can we prop our way out of this???
