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recommended carbs ???

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Old 08-19-2010, 09:34 AM
  #11
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The motors in this boat are 330's with cast iron intakes and the small oval port heads. They turn 4900 rpm. The 850 will do nothing but waste fuel. Go with a 700cfm. If these motors were the 365 mag with the aluminum intake and rect port head you might be ok with the 800. The HP 500 Merc motor uses the 800cfm Holley which is optimal for the stock hp 500. It has more compression it is a 502 and not a 454 and juiced up more then the 330. Plus it turns 5300 not 4900.

Vic would save more fuel with a 66-72 jet verse a 82 jet trying to obtain the proper air fuel mix.
Agree but still don't explain the speed because he is getting RPM. Oh your friend is cute.
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Old 08-19-2010, 09:57 AM
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Agree but still don't explain the speed because he is getting RPM. Oh your friend is cute.
LOL. Yeah she is. In the 60s is where that boat is with 330s. With mags it is at 70.
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Old 08-19-2010, 04:08 PM
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according to the engine tags on both engines there 365 or 385 NOT 330hps...not that the tags couldnt have been changed

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Originally Posted by Pro1 View Post
The motors in this boat are 330's with cast iron intakes and the small oval port heads. They turn 4900 rpm. The 850 will do nothing but waste fuel. Go with a 700cfm. If these motors were the 365 mag with the aluminum intake and rect port head you might be ok with the 800. The HP 500 Merc motor uses the 800cfm Holley which is optimal for the stock hp 500. It has more compression it is a 502 and not a 454 and juiced up more then the 330. Plus it turns 5300 not 4900.

Vic would save more fuel with a 66-72 jet verse a 82 jet trying to obtain the proper air fuel mix.
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Old 08-19-2010, 04:20 PM
  #14
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I don't think you're going to see much more speed out of the boat, even with small carbs.

The Mirage Plus props ran best on my Panther, just the same as they did for Blue Thunder even though I had TRS and he had Bravo's.

The Mirage "Plus" gives that boat the bow lift it needs. The regular Mirage props weren't as good. I spun the props in and out. In picked up 1-2 mph but the boat handled like chit in quartering seas.

I'd just run it the way it is.. he'll only see 1-2 mph with a carb change... Boat needs more power to run!

Last edited by Panther; 08-19-2010 at 04:22 PM.
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Old 08-19-2010, 04:25 PM
  #15
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Vic would save more fuel with a 66-72 jet verse a 82 jet trying to obtain the proper air fuel mix.
The carbs are too big for the engines in an ideal world but you can't just jet down to make up the difference if the carb is dwarfing the engine. In fact, sometimes you have to jet-up becaues the engine can't draw enough fuel because the venturi's are too big and there's no velocity.
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Old 08-19-2010, 04:57 PM
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Here's my vote! Keep the carbs and if he's not planning on doing engine work but maybe just looking for 1-2 mph... Spend the money he would have spent on carbs for a good dual-plane high-rise intake with 2" carb spacers. It might wake that engine up just a lil bit!

Oh yeah, and cut a 1" section out of the plenum divider.
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Old 08-19-2010, 06:02 PM
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I can attest to the fact that Blue Panthers boat is one bad mother. Sure suprised me. If anyone knows these boats, he is the guy.
Thanks Phil, yours is no slouch either and suprised me. We need a good rough water run with low or no passengers. That would just be titts.

Dave
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Old 08-19-2010, 07:49 PM
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Thanks Phil, yours is no slouch either and suprised me. We need a good rough water run with low or no passengers. That would just be titts.

Dave
You name the time and place. Mine runs a bit faster now that I have it propped correctly...

Saw 97mph with it a few weeks back. The only thing that slows me down is the girlfriend.
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