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Messages - 78millerjet

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Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 18, 2016, 11:59:58 AM »

Carb was rebuilt last winter. Engine runs good. Will have to look at stock manifold. At this point a full tune up and new ignition are in order. Maybe have the jet looked over. Its all original so its time

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 18, 2016, 11:48:01 AM »

Meant 4600rpm. I hadn't realized how spendy it was to get from 55 to 65.

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 17, 2016, 09:00:12 PM »

Sorry GT, didn't see your previous response..thx!

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 17, 2016, 08:55:09 PM »

Would the torker manifold and msd ignition do anything thing over stock? Figured if she breathes better maybe a bit better fuel economy.. if its best to just leave her stock. I'm ok with that too

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 17, 2016, 08:18:02 PM »

Thanks for all the advice guys!

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 17, 2016, 04:58:27 PM »

Its never been apart...I'm sure its a cast 1978 engineering special. Still has points and stock quad carb. Berkeley jet has never been rebuilt either. Its a great custom boat, ill never part with her even for a younger model...

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 17, 2016, 02:39:22 PM »

Its bone stock.. was thinking aftermarket intake manifold electronic ignition speed grate and diverter would wake her up a bit. About the only thing I do know about jets is it takes alot of hp to go fast

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 17, 2016, 02:30:27 PM »

Thanks for the replies!

Engine Mechanical / Electrical / Re: More jet boat speed

« on: February 17, 2016, 02:25:29 PM »

Pump is good. I believe its an A impeller. Sounds like 10 mph is unrealistic for 2k? Its a 9 out of 10 cosmetically and she's a keeper. If I cant get her to 65 ill leave her stock

Engine Mechanical / Electrical / More jet boat speed

« on: February 17, 2016, 01:52:24 PM »

Im new to the forums and a noob on engine mods. I have a 78 miller 20 ft mini cruiser with the bone stock 460 with log manifilfst. I believe top speed is 54 @ 4400rmp. She's a well built full stringer boat and a bit heavy. Besides an intake manifold electronic ignition speed grate and diverter, what will she need to reach 70? .I would be happy with an honest 65. Thx!

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