guys i have a 18 foot eliminator bubble deck that i baught from tom at jbp. it has a 496 bbc thats about a 10.5-1 motor,about 525hp the pump was redone by ars marine and added the larger bowl to the berk pump witch i also got from tom,it has a droop and a manuel diverter. i am running 72mph on gps, what can i do to pick up any more mph? would love to crack the 75mph mark? i am turnning 5000 maybe 5100 rpms? the pump also has a stuffer and a inducer, im pretty sure the hull was a original ss hull? as it came from the factory with over the tradnsome headers? its a 1976 boat? any tips any help would be great? im running a rpm air gap intake with a quick fuel 850 carb.also has pro comp alum heads. the baot does have a loader but dont know what it is? it was on the boat when i got it from tom? i will help with any info i can! pics info what ever you guys need to try to help me break the 75mph mark?? lol its only 3mph more that i want to get?

thanks for the help all
jason

Jet boat performance has a good chart on it. Tried to upload it, but not sure how to do that yet.

That was 3 guys full tanks and a ice chest ! Every little bit hurts !

How bout a pic of it running.
My Saguaro ran 74 with a Clay Smith cam and cleaned up 049 heads on a 454.

-beerjet-

A shoe and a ride plate would free that thing up a bunch. how far down are the loader ramps hanging below the keel? cutting the ramps to keel or above will help too. jmo
 

Looks like the loader is a little deep I'd put a straight edge and see how far your biting edge is. Thrust angle pin angle nozzle angle numbers would help to

when i get home today i will put a straight edge across it and get a measurement! just electric how do i check the thrust angle and the pin angle?

thanks again for all the help

It's all based on which impeller it has. If I remember right the A impeller peaks at 5,200 rpm. You may need to go to a stainless impeller

This is not true. I spun my stainless "A" to 6000 RPMs all day long.

Of course a stainless impeller will go up 6,000. An aluminum impeller, not so much.

The aluminum impellers are NOT limited by rpm, but rather HPabsorbed. You don't have enough information in any posts to tell you what needs to be done other than to kick your buddies out of the boat.

Jet boats live and die from weight and weight distribution.

Anything past around 500 HP and I say lose the aluminum impeller.

A shoe and a rideplate may or may not help, but at the same time, if done right, won't hurt either.

You should have enough HP to make the droop work for you, as long as you can fly the bow I say run it.

JMHO

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The aluminum impellers are NOT limited by rpm, but rather HPabsorbed. You don't have enough information in any posts to tell you what needs to be done other than to kick your buddies out of the boat.

Jet boats live and die from weight and weight distribution.

Anything past around 500 HP and I say lose the aluminum impeller.

A shoe and a rideplate may or may not help, but at the same time, if done right, won't hurt either.

You should have enough HP to make the droop work for you, as long as you can fly the bow I say run it.

JMHO

Sent from my SGH-T989 using SoCalJetBoats mobile app

Well said.

and in the next day or so will see if i can get a pic or a video of the boat running?

thanks guys

Looks like a southwind tunnel hull and yes that's a fast hull

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