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  1. #1
    ramnj's Avatar
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  2. #2

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    Any new links? Old thread

  3. #3
    Hydrotoys's Avatar
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    What are you trying to learn? The gpr single cooling is almost good enough for a 200psi triple piper... Dual cooling can handle most endurance triple-pipe skis.

    Triple cooling should be done with utmost caution, and a ton of pressure testing.

    -35psi max pressure at the head.
    -some type of cooling manifold (pre-engine) to limit chance of losing water to one cylinder. (not a problem with a single piper.
    -Absolutely no need on a single piper.

  4. #4

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    So really no need for a triple piper?

    (150 psi head)

  5. #5
    Hydrotoys's Avatar
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    Nope. Single cooling with a larger inlet line, and lose the flush port, is almost TOO MUCH water and yes, extra outlets are necessary. Dual cooling, and extra dumps are mandatory. I can't tell you how many times, I've seen folks say "it don't work" but have NO IDEA what their temps or pressures are.

    Whatever you do, buy a $25 oil pressure gauge and put it on your headto measure water pressure, and measure the actual pressure while setting it up. Use an el-cheapo engine temp gauge to see what it's doing.

    As a guideline, 1/2" line in, 5/8" line out, or 3 1/8" lines out...but 35psi or LESS. That is your ticket to happiness.

    Most overheats are due to lean conditions. Rarely is it due to lack of water on a gpr. RARELY. Stock water systems with minor tweeking are the sweet ticket.

  6. #6
    krispaintballz's Avatar
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    Quote Originally Posted by Hydrotoys View Post
    Nope. Single cooling with a larger inlet line, and lose the flush port, is almost TOO MUCH water and yes, extra outlets are necessary. Dual cooling, and extra dumps are mandatory. I can't tell you how many times, I've seen folks say "it don't work" but have NO IDEA what their temps or pressures are.

    Whatever you do, buy a $25 oil pressure gauge and put it on your headto measure water pressure, and measure the actual pressure while setting it up. Use an el-cheapo engine temp gauge to see what it's doing.

    As a guideline, 1/2" line in, 5/8" line out, or 3 1/8" lines out...but 35psi or LESS. That is your ticket to happiness.

    Most overheats are due to lean conditions. Rarely is it due to lack of water on a gpr. RARELY. Stock water systems with minor tweeking are the sweet ticket.
    That would cause neg pressure?????.... 1/2" < 5/8" ..........I might be wrong but I am running 2, 1/2" lines in and 3, 3/8" lines out. This gives me under 20 psi. Water moves fast enough to get the heat out but not too fast where the water cannot absorb the heat. Just some thoughts. No one is wrong just asking some questions.

  7. #7
    Hydrotoys's Avatar
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    On a gpr, no it's not backwards. A smaller pressurized line can, and does supply a but ton of water, and the pressure drops out as you add more lines.

  8. #8
    krispaintballz's Avatar
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    Sounds good hydro just was wondering. Thanks man.

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