Super Jet Cooling line quick disconnects

96superjet

96superjet

Location
Home of the Steelers!
Every time I pull a motor to do some work inside a hull, I have to wrestle cooling lines off and back on aluminum through hull fittings which are never standard size (FootRocket). So I thought adding quick disconnects would make my life vastly easier, but then I realized the ID of quick disconnects designed for 3/8" cooling line is a mere 1/4". I was concerned about limiting water flow to my motor.
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My skis are setup for dual cooling and Lake Erie was 64 F yesterday, but I wondered if this new inline reduction of water flow from 3/8" to 1/4" would be detrimental.

Then I had another thought... The brass 90 fitting at the pump has an ID just slightly larger then 1/4".
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So, should adding quick disconnects between the in hull aluminum lines and the exhaust manifold present any adverse conditions?




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Roseand

Roseand

The Weaponizer
Site Supporter
Location
Wisconsin
WDK uses push connect quick disconnect fittings on everything. Might as well just go that route if you want easy removal. I like mine.

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96superjet

96superjet

Location
Home of the Steelers!
As a continuation of my thought process. At both ends of everyone's cooling system is two or four 0.28" ID brass 90 degree elbows (depending if you're setup for dual or single line cooling). Cooling starts at the pump 90 degree brass fitting(s) and ends at the exhaust manifold 90 degree brass fitting(s). There just happens to be a 3/8" (0.375") tubing pathway between them. I can't imagine a 1/4" (0.25") quick disconnect in the middle of said pathway making a significant difference.


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speedysprocket

speedysprocket

Alex
Location
Chesapeake, VA
"Is this just a 701, or something bigger?" should be the first question. For bigger than 701, I would not recommend the 1/4" disconnects. Maybe heat up the ends of your hoses before pushing them onto the hard lines so they expand some and are easier for the next times...
As far as the brass fittings, I have seen them with various IDs for the same OD. All depends on the manufacturer. Regardless, I drill them all out to maximize flow, though.
 
speedysprocket

speedysprocket

Alex
Location
Chesapeake, VA
96superjet said:
As a continuation of my thought process. At both ends of everyone's cooling system is two or four 0.28" ID brass 90 degree elbows (depending if you're setup for dual or single line cooling). Cooling starts at the pump 90 degree brass fitting(s) and ends at the exhaust manifold 90 degree brass fitting(s). There just happens to be a 3/8" (0.375") tubing pathway between them. I can't imagine a 1/4" (0.25") quick disconnect in the middle of said pathway making a significant difference.


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Click to expand...
And those 90s on the top of the head pipe are stupid. Unless your bypass fitting is right there, get a straight barb!
 
x2mafia

x2mafia

Maximum effort
Location
WA
I have those disconnects too they are rated some pretty good psi like 150 or 200 or something. I use them for hot hands and hot feet to redirect the pissers
 
X

X2Kid

Location
Canberra, Australia.
Might I suggest you modify your existing lines to replicate the level of restriction you'd have with quick disconnects and do some testing with temperature strips (adhesive labels that permanently indicate a maximum temperature reached) affixed near the coolant exit. You'd need to find out from a respected tuner the optimal/safe operating temperature and select strips that cover that range.
 
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