74 hallett

« **Reply #150 on:** September 23, 2013, 09:03:52 AM »

Quote from: Bunger on September 17, 2013, 06:27:39 AM

Had my buddys dad color sand buff and wax her. Ready for parker this weekend

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Looks clean man! I want to do this to my boat

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« **Reply #151 on:** September 23, 2013, 10:09:42 AM »

Quote from: Bunger on September 23, 2013, 08:44:26 AM

I usually dont run water through the headers at idle just because of the big cam i have. But when im at cruising speed i usually turn the valve to the med or high position and will get quite abit of water coming out. I didnt think sucking water in above idle was an issue?

reversion will kill exhaust valves, etc... its not gonna suck it into the oil side of the motor.

im guessing too much pressure or you blew a gasket/seal somewhere. get the water out of it asap, dont let it sit with water. new intake gaskets (head gaskets are tough to blow on these things...) and put a pressure relief valve on the pump and go boating.

« **Reply #152 on:** September 23, 2013, 11:33:55 AM »

Ya im gunna pull and swap gaskets. I have a full gasket kit so i might as well. As far as the pump inlet goes do i need a gate valve and a pressure relief? Any pics of the setup i need to run?

« **Reply #153 on:** September 23, 2013, 11:56:52 AM »

Quote from: Bunger on September 23, 2013, 11:33:55 AM

Ya im gunna pull and swap gaskets. I have a full gasket kit so i might as well. As far as the pump inlet goes do i need a gate valve and a pressure relief? Any pics of the setup i need to run?

gate valve will limit flow which will regulate temperature. the pressure relief valve will vent out excess pressure to a dump line out the back of the boat. this topic has been beaten more than a dead horse and some people get by with just a gate valve, some people dont.

I like TJ's setup. Clean, strained, and he's got a smaller separate line for his headers and the block. If its good enough for his blown injected beast, it should be good enough for anyone else.

« **Reply #154 on:** September 23, 2013, 03:20:22 PM »

Wow thats clean. Not really understanding the need for the seperaye line to the headers? Is that where excess is dumped instead of the back of the boat?

« **Reply #155 on:** September 27, 2013, 11:15:40 AM »

Alright so should i run a pressure relief valve or a pressure regulator?

« **Reply #156 on:** September 28, 2013, 08:23:31 AM »

Relief. Stay away from regulator

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« **Reply #157 on:** September 28, 2013, 08:25:19 AM »

Ok. Home depot brand is fine?

« **Reply #158 on:** September 28, 2013, 09:23:34 AM »

Honestly your better off buying the kit offered from jbp, it's about a 100 bucks and comes with everything not to mention the valve is marked so adjustments are easier. By the time you piece it together you'll be about the same price

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« **Reply #159 on:** September 28, 2013, 09:33:51 AM »

All you need is a gate valve and a way to hook a hose up

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« **Reply #160 on:** September 28, 2013, 10:33:39 AM »

A gate valve wont regulate pressure only volume. Youd use a gate valve to adjust temp

« **Reply #161 on:** September 28, 2013, 02:57:08 PM »

I have done it this way for ever no problems

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« **Reply #162 on:** September 28, 2013, 02:59:38 PM »

Ya but ive got a olds haha. Plus my pumps been worked on im sure theres a little more pressure than a stock one

« **Reply #163 on:** September 29, 2013, 09:52:23 AM »

Pulled the motor yesterday. Pulled the pan off and Put the hose on the motor to try to find what gaskets leaking and couldnt find a drop. Left the block pressurized for about 4 hrs and still nothing. Figure my pump puts out more pressure that my house does?

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« **Reply #164 on:** October 01, 2013, 05:29:31 PM »

Could I have gotten this much water in through the headers? Been pretty careful with the header valve but have forgot to turn it off a few times....

« **Reply #165 on:** October 02, 2013, 04:08:57 PM »

Nice 750 in the background. I had a 96 SXI with a lot of stuff done to various things. Riding a 701 sj now

« **Reply #166 on:** October 02, 2013, 04:10:27 PM »

And a fresh pump puts out about 150psi per Jack McClure's advice. Your house is closer to 10psi

And a gate valve does reduce pressure. Pressure regulators constrict flow to reduce pressure.

« **Reply #167 on:** October 02, 2013, 04:16:13 PM »

Thanks its my brothers. I had a superjet too but had to sell it to break out another thousand haha

« **Reply #168 on:** October 02, 2013, 04:20:22 PM »

Quote from: BIG JOHNSON on October 02, 2013, 04:10:27 PM

And a fresh pump puts out about 150psi per Jack McClure's advice. Your house is closer to 100psi. fixed.

And a gate valve does reduce pressure. Pressure regulators constrict flow to reduce pressure.

I miss my 750 but I love my square nose.

I sold my 750 when I bought my boat and quickly regretted it. I live almost on Lake Norman and I ride the ski way more than I drive the boat.

« **Reply #169 on:** October 12, 2013, 10:21:09 PM »

Little update. Yanked motor changed intake and timing/water pump cover gaskets. Used the bitchin felpro gaskets and a bunch of rtv. Picked up a pressure relief valve setup from bob at bjs marine. Tits lookin piece. A bit pricey though. Gunna wake up early tommorow and try to get some oil and a few other things and try to make it to elsinore for a little shake down. Anyone gunna be out there?

« **Reply #170 on:** October 12, 2013, 10:24:34 PM »

Shitty pic but you get the idea

« **Reply #171 on:** October 13, 2013, 09:30:17 AM »

Quote from: BIG JOHNSON on October 02, 2013, 04:10:27 PM

And a fresh pump puts out about 150psi per Jack McClure's advice. Your house is closer to 10psi

And a gate valve does reduce pressure. Pressure regulators constrict flow to reduce pressure.

Just read this......

A jet pump will not generate over about 80psi unless you get into the 800HP range.

Typical city water pressure is between 40 and 65 pounds.

On the ranch I was living on we had 80 pounds of water pressure at the barn.

To add to that, if flow is reduced, the pressure will drop dramatically. That is how the pressure regulator works, it is just using the pressure as a control medium.

Not being a smart ass, just keeping the facts on the surface.

GT

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« **Reply #172 on:** October 13, 2013, 09:57:54 AM »

Quote from: Bunger on October 12, 2013, 10:24:34 PM

Shitty pic but you get the idea

Constructive criticism.

You should not ever have just rigid fittings on the water line from the pump. Especially without some sort of brace. There can be a buttload of vibration in that area and if that nipple breaks off, the boat will surely sink like a stone. There realistically should be a shut off valve and some type of vibration eliminator from the pump to all that hardware. I use hydraulic hose.

Also, like you mentioned, that is not a pressure regulator, but a pressure relief valve. There is still the possibility of over pressurization with that set up. Hope all works out for you.

As an fyi, I think you have had a reversion issue. There should NEVER be steam coming from the headers at anything less than about 1500-1800 rpm.

If you get too much water to the headers, try increasing the dump line size.

GT

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« **Reply #173 on:** October 13, 2013, 10:47:39 AM »

Quote from: Bunger on September 28, 2013, 10:33:39 AM

A gate valve wont regulate pressure only volume. Youd use a gate valve to adjust temp

Hate to disagree with you here, but the regulation of flow is the same as pressure. The only other adjustment you can possibly make is to the dump line outlet size.

If you were to regulate the pressure, it is the same thing as regulating flow. Just a different controlling medium.

The nice thing about using a gate valve (sound of beating a dead horse in the background) is that the rate of flow is NOT linear like a pressure regulator. Also no moving parts... (more beating)...

GT

« **Reply #174 on:** October 13, 2013, 09:15:50 PM »

Boat ran good. But anything over 30 mph and the water pressure would go above 15 even with the pressure relief valve back oit all the way. When id hammer down out of the hole it would max out the 30 psi guage. Would a gate valve help bring it down? Water temp neverrr goes above 110.

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