SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: che77y on June 18, 2015, 05:09:40 PM

Title: Cooling temp question
Post by: che77y on June 18, 2015, 05:09:40 PM
So I have a gate valve to tee to logs to front cover and exits out the thermostat  housing. I also installed gate valves on both exit points in the t stat housing. My q is, can't I slow the inlet volume and the exit volume equally so I can get a higher temp while still filling the motor completely?  I'd like to see 160 I'm 120 which I believe is def robbing power
Title: Re: Cooling temp question
Post by: mobboss on June 18, 2015, 05:34:49 PM
I have a olds 455 and mine runs 140 all day! Be careful to limit the the exhaust side of the flow. You can creat to much pressure and ruin your head gaskets.


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Title: Re: Cooling temp question
Post by: mobboss on June 18, 2015, 05:38:57 PM
I'd leave it alone if it were mine.


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Title: Re: Cooling temp question
Post by: GT Jets on June 18, 2015, 05:44:16 PM
So I have a gate valve to tee to logs to front cover and exits out the thermostat  housing. I also installed gate valves on both exit points in the t stat housing. My q is, can't I slow the inlet volume and the exit volume equally so I can get a higher temp while still filling the motor completely?  I'd like to see 160 I'm 120 which I believe is def robbing power

No.

Imho, eliminate the valves on the outlets.

Why are you trying to raise the temperature?  Think about this.

No matter what temperature you see leaving the engine, the entering water is still lake temp.

Set the valve off the pump for 150°F at idle and leave it alone.

The 1 or 2 hp you are potentially losing its not worth destroying the engine.

GT
Title: Re: Cooling temp question
Post by: che77y on June 18, 2015, 06:56:30 PM
No.

Imho, eliminate the valves on the outlets.

Why are you trying to raise the temperature?  Think about this.

No matter what temperature you see leaving the engine, the entering eatery is still lake temp.

Set the valve off the pump for 150°F at idle and leave it alone.

The 1 or 2 hp you are potentially losing its not worth destroying the engine.

GT
ok guys I'll do that I do kno too cool is,also bad for a motor I can live w 150 but 120 is too cold I think
Title: Re: Cooling temp question
Post by: GT Jets on June 18, 2015, 07:01:19 PM
ok guys I'll do that I do kno too cool is,also bad for a motor I can live w 150 but 120 is too cold I think

It will run about 120°F to 140°F at wot.

Again,  cylinder 1 and 2 will run colder than the rest.

GT
Title: Re: Cooling temp question
Post by: che77y on June 18, 2015, 07:08:18 PM
It will run about 120°F to 140°F at wot.

Again,  cylinder 1 and 2 will run colder than the rest.

GT
10 4 thanks GT and every one who responded
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