Cool video. Just a FYI On the liquid fill gauge there's a round rubber plug of some sort on the back, air gets trapped overtime from laying around or something just pop it out halfway and the needle will go back original to reading "0"
Hey guys. I just bought a 1979 eliminator jet boat with a 460. I see that the plumbing im my boat needs an update considering there is a ball valve by drivers seat to regulate temp.WTF!! I have been looking for a pressure relief valve that has a low pressure range. All I can find are 50psi and up. I know that there are companys selling valves for jet boats but they want 79.99 for a 15.00 valve. Can you point me in the right area to find one . Thanks
This is snake oil. Your jet drive doesn't push enough water pressure to do damage to the engine. I admit I sold my jet boat around 2010 and never seen this before. Ill say this to mr 455, My 455 put out way more hp than yours and I never blew anything in the cooling system. One I know how to build my 455, ported heads, 10:1 forged pistons, oil cooler, 10 quart pan, block bored .60 over, nodular crank, stock olds rods, Mondello main oil plugs, engine balanced, fly wheel not a flex plate, Offenhauser dual 4 tunnel ram, dual 750 Holley's, Nitrious Oxide cheater system using 250 shot, Berkley pump with AA impeller, place diverter. If your jet drives water pressure is doing damage to your engine then you have did something wrong. The only damage I ever did to my engine was a bent rod and 3 scored pistons from standing on the nitrious button to long. I owned my jet boat 20 years, 3 rebuilds and 2 blocks. I was hard on it because I like going as fast as I can. But never once any type of damage due to extreme water pressure or overheating. And btw I never ran a water restrictor plate at the thermostat housing. I also used Hardin marine exhaust logs and through the transom trumpets using the largest opening for flow. I got tired of getting burned. Only jet drive boat I could see needing this is top fuel drag or even maybe alcohol. I see CP performance is selling this so ill look through my CP performance book from the mid 90's to see if they sold this.
Oldsmob455 Okay well i am new to the jet boating scene and right now I’m building a drag boat. Got a Sanger super jet hull with a built Berkeley pump. I’m a custom engine builder for a UMP modified dirt team and I’ve just got my sbc off the dyno and ready for my hull. Just need some insight on plumbing this. 800 hp 400 cubic inch sbc that spins 9,000 rpm. I am running dry open headers which is obvious. I am running a racepak data logger and dash and running sensors everywhere. Where do i put my relief valves? And I’m running either -12 or -16 an braided line on everything plumbing.
I'll say this, we plan on converting to a water to water cooler with a electric pump so we are not running lake water through our block. I think we had a video on our plumbing after this one where we plumbed in a v block. A guy at Mondellos once told me he has a releif valve at all four corners of his intake. My setup is attempting to releive the pressure before it gets to the block. The key to your set up is going to be getting the right impeller that makes the sbc run where it likes it.
Oldsmob455 thanks man. I’ll try and look into what needs to be done! I have the right angle cut impeller for my rpm. Just gonna be plumbing this thing to get the right temp and pressure.
Cool video. Just a FYI On the liquid fill gauge there's a round rubber plug of some sort on the back, air gets trapped overtime from laying around or something just pop it out halfway and the needle will go back original to reading "0"
Would it be possible to find out what brand the gauge is that isn't liquid filled ???
yup mine is ontop of the intake
So u have to have two pressure relief valves. And where do you run the r/v discharge hoses
Hey guys. I just bought a 1979 eliminator jet boat with a 460. I see that the plumbing im my boat needs an update considering there is a ball valve by drivers seat to regulate temp.WTF!! I have been looking for a pressure relief valve that has a low pressure range. All I can find are 50psi and up. I know that there are companys selling valves for jet boats but they want 79.99 for a 15.00 valve. Can you point me in the right area to find one . Thanks
so turning the valve in raises the pressure correct ???
This is snake oil. Your jet drive doesn't push enough water pressure to do damage to the engine. I admit I sold my jet boat around 2010 and never seen this before. Ill say this to mr 455, My 455 put out way more hp than yours and I never blew anything in the cooling system. One I know how to build my 455, ported heads, 10:1 forged pistons, oil cooler, 10 quart pan, block bored .60 over, nodular crank, stock olds rods, Mondello main oil plugs, engine balanced, fly wheel not a flex plate, Offenhauser dual 4 tunnel ram, dual 750 Holley's, Nitrious Oxide cheater system using 250 shot, Berkley pump with AA impeller, place diverter. If your jet drives water pressure is doing damage to your engine then you have did something wrong. The only damage I ever did to my engine was a bent rod and 3 scored pistons from standing on the nitrious button to long. I owned my jet boat 20 years, 3 rebuilds and 2 blocks. I was hard on it because I like going as fast as I can. But never once any type of damage due to extreme water pressure or overheating. And btw I never ran a water restrictor plate at the thermostat housing. I also used Hardin marine exhaust logs and through the transom trumpets using the largest opening for flow. I got tired of getting burned. Only jet drive boat I could see needing this is top fuel drag or even maybe alcohol. I see CP performance is selling this so ill look through my CP performance book from the mid 90's to see if they sold this.
There is a reason your radiator cap relieves pressure at a certain psi.
@@Oldsmob455 thats in a car not the same for a boat. this type of boat has no radiator
What’s the second relief port for?
We have enough horsepower that one isn't enough when we put the hamer down.
Oldsmob455 Okay well i am new to the jet boating scene and right now I’m building a drag boat. Got a Sanger super jet hull with a built Berkeley pump. I’m a custom engine builder for a UMP modified dirt team and I’ve just got my sbc off the dyno and ready for my hull. Just need some insight on plumbing this. 800 hp 400 cubic inch sbc that spins 9,000 rpm. I am running dry open headers which is obvious. I am running a racepak data logger and dash and running sensors everywhere. Where do i put my relief valves? And I’m running either -12 or -16 an braided line on everything plumbing.
I'll say this, we plan on converting to a water to water cooler with a electric pump so we are not running lake water through our block. I think we had a video on our plumbing after this one where we plumbed in a v block. A guy at Mondellos once told me he has a releif valve at all four corners of his intake. My setup is attempting to releive the pressure before it gets to the block. The key to your set up is going to be getting the right impeller that makes the sbc run where it likes it.
Oldsmob455 thanks man. I’ll try and look into what needs to be done! I have the right angle cut impeller for my rpm. Just gonna be plumbing this thing to get the right temp and pressure.