Water pressure

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Flusher

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« Reply #100 on: April 20, 2014, 12:59:05 AM »
On the race boat, I liked using the drain holes in the block to feed the water and have water leaving all four corners of the heads... Seemed to really even out the temperatures and keep sand/silt at bay.

GT

Hi GT,

I am really curious about this mod.  When you do this, do you open up the block deck surface and the head gaskets?  Does the flow through the block flow fore and aft or does it still flow aft, up to the heads, then forward?  If the flow is both fore and aft to equalize the temp in the cylinders, how does sufficient flow cool the heads around the center cylinders if the flow enters the block in the lower center, flows forward and back, up into the heads, and out the four corners?  If the flow is in through the bottom center of the block, flows aft and up to the heads, and forward to the front corners as it also exits the rear corners; how do the front cylinders cool and is there enough flow to the front of the heads?  Do you restrict the water leaving the rear of the heads?

Thank you in advance,

Joe
"I want to roll with my brother Joe" - Joe Bateman - January 29, 1950 ~ November 27, 2013



GeneralLee

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« Reply #101 on: April 20, 2014, 01:11:46 AM »
Oh no GT is about to go on one of his 3 page explanations haha...Get'em GT!!!!!




pipes

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« Reply #102 on: April 20, 2014, 06:36:17 AM »
My hat's off to you gt! You have a lot of patience

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riverrat4life

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« Reply #103 on: April 20, 2014, 09:46:34 AM »
I totally thought you were talking about air cooled being porchse or volkswagon..lol I dont know buddy, I still think running a closed loop system would be worth checkin out to me..I dont think youd need a 40' crusier either haha My example would be say like in a 19 or 20' mini cruiser, instead of a dog house cover, one could make a bracket to hold a radiator in place of the engine..youd need like 12-15" clearance , no? tag gt
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riverrat4life

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« Reply #104 on: April 20, 2014, 09:52:56 AM »
*in front of the engine lol not in place..12-15" clearance so you could mount the rad and a set of fans..beck I bet a rear bench could still be put in as well. Do a full setback on the pump and don't use a jetaway. Move the engine back allowing more room...

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GT Jets

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« Reply #105 on: April 20, 2014, 10:49:21 AM »
I totally thought you were talking about air cooled being porchse or volkswagon..lol I dont know buddy, I still think running a closed loop system would be worth checkin out to me..I dont think youd need a 40' crusier either haha My example would be say like in a 19 or 20' mini cruiser, instead of a dog house cover, one could make a bracket to hold a radiator in place of the engine..youd need like 12-15" clearance , no? tag gt

My point was, why? Why on earth would you one; run a performance engine that hot? and two; go through all the trouble of making an automotive setup work?

It makes no logical sense to me at all...

You crazy...  :screwy:
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

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Ray

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« Reply #106 on: April 20, 2014, 10:58:43 AM »
Hi GT,

I am really curious about this mod.  When you do this, do you open up the block deck surface and the head gaskets?  Does the flow through the block flow fore and aft or does it still flow aft, up to the heads, then forward?  If the flow is both fore and aft to equalize the temp in the cylinders, how does sufficient flow cool the heads around the center cylinders if the flow enters the block in the lower center, flows forward and back, up into the heads, and out the four corners?  If the flow is in through the bottom center of the block, flows aft and up to the heads, and forward to the front corners as it also exits the rear corners; how do the front cylinders cool and is there enough flow to the front of the heads?  Do you restrict the water leaving the rear of the heads?

Thank you in advance,

Joe

The water flow on that deal was completely vertical. The head gaskets were not modified at all, same 3/16" holes for the water to enter the heads.

There are two water outlets on every big Chevy, small Chevy, big Ford, small Ford head and that include MOPAR also.

The intake manifold blocks off the two rear water ports. We drilled 3/8" pipe ports in the rear of the intake manifold (RPM Air Gap) and used the factory water ports on the front of the intake. It went to a log of sorts with four ports with a valve on all for ports and that went overboard, the valves were drilled so they would not close all the way, yes, they were half inch gate valves...  ;) We could balance the water flow out of the engine with the four gate valves to get close to the same temp out of all for corners. It worked great and eliminated the sand trapping issue we were fighting. Low water conditions would fill the block with sand in a virtual heartbeat.

We had to drill and re-thread the block drain holes to 3/8"NPT, that for me was the only sketchy part.

The water entered at the bottom and exited the manifold, no water entered the front of the engine and the thermostat hole was a flat plate with a pressure gauge in it.

GT
« Last Edit: April 20, 2014, 02:34:37 PM by GT Jets »
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

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« Reply #107 on: April 20, 2014, 11:11:32 AM »
Hi GT,

I am really curious about this mod.  When you do this, do you open up the block deck surface and the head gaskets?  Does the flow through the block flow fore and aft or does it still flow aft, up to the heads, then forward?  If the flow is both fore and aft to equalize the temp in the cylinders, how does sufficient flow cool the heads around the center cylinders if the flow enters the block in the lower center, flows forward and back, up into the heads, and out the four corners?  If the flow is in through the bottom center of the block, flows aft and up to the heads, and forward to the front corners as it also exits the rear corners; how do the front cylinders cool and is there enough flow to the front of the heads?  Do you restrict the water leaving the rear of the heads?

Thank you in advance,

Joe

Forgot to mention... You are aware that the water ports in the block are wide open from front to rear right? There is NOTHING directing the water through the engine, which is why I am hammering the thermostat deal so hard. The water in the block is not distributed, it simply goes in the front and leaves the front. That is where I have the hard on for these guys saying it's the "only way".. IMHO it's the "wrong way"... There is nothing "routing" the water to the rear cylinders of the heads. Never was.

GT
« Last Edit: April 20, 2014, 11:51:15 AM by GT Jets »
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

riverrat4life

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« Reply #108 on: April 20, 2014, 11:11:44 AM »
Lol GT I just wanted to know if an automotive closed loop cooling system could be ran on a jet boat...I guess really the possibilities are numerous...im not crazy buddy, im just brainstorming ;-) thank you for your insight though GT!! I always enjoy readying your posts :)

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jet fever

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« Reply #109 on: April 22, 2014, 08:08:18 PM »
  8) yep went air cooled.

Got out my Dremel cut fins around the cylinders  running ambiant.

Dont need gate or a tstat

This has been read ALOT and I just want these guys/girls to quit getting blown gaskets or milky oil so I feel like if it was so simple to have a system of anykind it would be less likely to happen but...  Seems like theres a few who set the boat up wrong and they pay the price.  My issue or argument isnt what to use its just not being used or setup right.  May seem easy to u but maybe the ole weekend warrior thinks hey i got her dialed in and next thing u know gots issues. 

Anyway the original thread was Water Pressure.  I found a way for me on my boat to control mine.  Hope u find yours.
  • Boat #1: 76 Hallett Bubble Deck

 


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