SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Ultra460 on February 27, 2009, 07:14:07 PM
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It's a 330hp 460. Mostly stock with a weiand stealth intake manifold, holley 850dp carb, mallory unilite distributor, long bolt logs.
That's about it.
The carb currently has
-choke horn milled off
-80's primary and secondary
-25cc primary acc. pump cam
-50cc secondary acc. pump cam
-65 powervalve
What do you think I should be running for jets?
Also should I bypass the power valve or leave it?
Thanks, John
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80's seem a little big for that set up,start off with 72 front 78 in the rear.
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80's seem a little big for that set up,start off with 72 front 78 in the rear.
Yeah I know thats what it came with. Carb is definately over kill but I had plans to grow into it... ;D
So should I keep the PV?
By the way I'll give you a call tomorrow.
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Yeah I know thats what it came with. Carb is definately over kill but I had plans to grow into it... ;D
So should I keep the PV?
By the way I'll give you a call tomorrow.
Keep the PV in the front and ditch the one in the rear.
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I have the same question for my boat, which jetting to start at??
460 ford, 425+ HP, victor JR manifold, MSD dizzy & Mallory Hyfire 6 Ignition..
I just ditched my Holly 750 vac carb for a Holly 850 mechanical..
This is the carb I'm putting on it.. http://www.socaljetboats.com/index.php?topic=5797.0
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Do you know the setup on the carb? what size jets, power valve ,air bleeds,give use more info.
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It's has the choke horn milled off..
- 80 Pri, 82 Sec
- 65 power valve (in both pri & secondary, only the secondary is stamped w/ the 65)??
- It does have air bleeds (they don't appear to be drilled larger than stock) and their not adjustable..
- The primary accelerator pump cam is light green/clear w/ 218 stamped on it..
- The secondary accelerator pump cam is white/clear w/ 466 stamped on it.. Not sure which one for sure though cause on Holley's site the orange has the same 466.. http://www.holley.com/20-12.asp
Am I missing anything?? Sorry, I'm not the best w/ Carbs, but I'm pretty mechanical and can learn.. I can read plugs and adjust OK, but I'm not the best at dialing a carb in.. Anyone know of any good books or knowledge of the in's-n-out's of tuning a carb?
-- Also, i've from reading above it doesn't seem like the secondary PV is needed?? If so, how is it removed? I know I can just unscrew it, but do i just leave the hole there or cover it up?
Thanks Guys! ;D
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