SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: electrowoman on June 18, 2008, 07:36:22 AM
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When I switched my exhaust manifolds to Logs I was told to run the water in the exhaust first then to the block. The idea was to preheat the water when it was cold I suppose.
Now my question is when the lake water is warm, would it be wise to run the water to the block first then the manifolds last?
My old system put the water to the motor first then it came out to the manifolds.
I've had no problems with temp yet but I'm curious, does anyone switch the feeds to suit water temp
with this setup?
Hardin marine logs, 460 Ford engine.
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How warm of lake water are you talking about? I would leave it going thru the logs first then the block. Lake water isnt going to get warm enough to make a difference.
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It will be in the mid 80's for sure.
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The water would have to be over 120* before it even effected the cooling of the engine IMO, there is so much cooling available that you will probably still have to throttle it to get it to warm up, think about your car, the water leaving the radiator on a hot day is like 150* and the engine still runs around 190*, I would run the water through the manifolds first. Seriously doubt it would cause any problems..
On the flip side of that, hotter exhaust pipes flow better, so I guess its a catch 22...
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Thank you :)