inner cooler cold water shock?
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inner cooler cold water shock?

  1. #1
    Senior Member Skydog's Avatar
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    Default inner cooler cold water shock?

    Ok guys i want to use outdrive to force feed inner cooler. But am being told that no water at idle and the rush of cold water when i take off could crack the the innercooler? Is this fact? Seams like thats how must plum the innercooler.
    thank u

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    Senior Member MACHINEHEAD1's Avatar
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    I mentioned in the other thread you started about a -6 line off the merc pump with a check valve. Positive flow with engine running and force feed takes over. Havnt heard of cores cracking.

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    gn7
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    I am not a fan of having water thru the chiller at idle. It invites fuel puddling in the manifold.
    Never saw a reason to pump water thru one either. A drag system will feed the water when it needs water, and it does need water if the thing isn't in boost. If you in boost, your moving fast enough to supply it water.
    How can it crack a chiller core, if the chiller core isn't hot. Where did the heat come from at a idle. Boost make heat. No boost, no heat.



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    Senior Member Skydog's Avatar
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    Ok thank u guys. That helps a ton, no water it is :-):-):-):-)

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    Senior Member tigertooth's Avatar
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    Quote Originally Posted by gn7 View Post
    I am not a fan of having water thru the chiller at idle. It invites fuel puddling in the manifold.
    Never saw a reason to pump water thru one either. A drag system will feed the water when it needs water, and it does need water if the thing isn't in boost. If you in boost, your moving fast enough to supply it water.
    How can it crack a chiller core, if the chiller core isn't hot. Where did the heat come from at a idle. Boost make heat. No boost, no heat.
    Tested My Inercooler On The Trailer. Ran It No Load On The Trailer For 5 Minutes. Opened Water To Cooler. Water Out Of Outlet Was 140 Degrees. Water In Was About 80 Degrees. If The Jet Had Been In The Water It Would Have Had More Load Wich Would Have Made ThatOutlet Temp Even higher Just Idling. Just Saying.

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    gn7
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    You have serious problems. My intake runs cooler at idle then ambient. I feed my cooler out into my oil cooler and never seen 140 into the oil cooler under full load at the end of a 20 minute race. Maybe this is somethng that only happens to boats that have a USGC cert tag



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    Last edited by gn7; 05-04-2013 at 09:35 PM.

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    Senior Member tigertooth's Avatar
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    Quote Originally Posted by gn7 View Post
    You have serious problems. My intake runs cooler at idle then ambient. I feed my cooler out into my oil cooler and never seen 140 into the oil cooler under full load at the end of a 20 minute race. Maybe this is somethng that only happens to boats that have a USGC cert tag
    You Really Need To Take Your Medication. Dont Hate The Messenger Just Because My Results Are Different Than Yours.

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    Senior Member Skydog's Avatar
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    Well should have all the parts tomorrow. I have a hull pick up threw bottom of boat up to 1 1/4" hose to a sea strainer,with a psi dump out the back of boat. From strainer to a log header two stage pump, out the two stage pump log header, too oil cooler, power steering cooler,then in front of motor then out to headers and out the tail pipes. I added two small 1/4" hose dumps on the back upper rear of intake to a tee and then dumping out the back of boat. For inner cooler coming in from imco lower to sea strainer with psi dump out the back of boat. Then feed inner cooler from strainer and then dump out the back of inner cooler. Hope motor is happy. Water psi in motor 50mph shooting for 10-15PSI over 120MPh 20-25PSI. Same for inner cooler? 600 Merlin,big tubes, 8.3 Whipple,Pro 1 heads, 8PSI of boost,93 octane, 34deg locked out,1050s Dom,Afr 11.2-11.5

    Thank you guys
    Last edited by Skydog; 05-09-2013 at 12:05 PM.

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    Quote Originally Posted by tigertooth View Post
    You Really Need To Take Your Medication. Dont Hate The Messenger Just Because My Results Are Different Than Yours.
    delete it, or cut off left pinky. hard to read.

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    Senior Member tigertooth's Avatar
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    Quote Originally Posted by BadBehavior View Post
    delete it, or cut off left pinky. hard to read.
    Stupid Phone. Does It When It Feels Like it.

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    Senior Member SHAWN DAVIS's Avatar
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    I have pumped thru the cooler on several different combos, screw and roots blown, have see zero difference than force feeding. Most are offshore type, and lots of idling involved

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    Member DirtyJohnson's Avatar
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    Skydog, the pressure feeding system is old school and I think most are pumping including mercury racing. I am converting mine right now with a 2 stage pump with one going to the intercooler. not sure I have heard of cores cracking but I have heard of heat soaking after hard runs then trying to get back on it when the water hasn't had a chance to cool everything.

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    for what its worth, I added a 2nd stage to my hardin pump when I added the 4.5l whipple. this was partly due to not wanting to add another bottom pick-up to the boat and the fact that I cannot rely on using the drive pick-up due to the high X dimension.

  16. #14
    Senior Member MACHINEHEAD1's Avatar
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    I have done a lot of research on this in the field, on many boats, with full instrumentation. All results were a little different. Sometimes with a forcefed Imco lower, the cooler would get no water at certain trim levels and speeds. If you are in boost and making heat this is not good. You could change trim angle or speed up and see a little steam puking from the discharge as solid water came back on line. This is why it is trial and error, for your boat and your combo and your driving style. I recomend some form of preasure feed as I have described in this and other posts. This is why you put the discharge on the drivers side, so you can watch it. Some of these boats would get into boost for 5-10 seconds just rolling the boat over to plane. You have to figure this out, no one time internet answer.

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