Engine cooling/heating

[Bugginout]

Are you guys restricting water flow to keep heat in the engine instead of just running around at low temps?

 

[warpt71]

Oil temp is what is important. I ran 2 inlets and 3 dumps, 2 out the transom and one through a Bassett T to the headers

 

[Bugginout]

Oil temp is what is important. I ran 2 inlets and 3 dumps, 2 out the transom and one through a Bassett T to the headers

Yeah I will keep oil temps down for sure. Waiting for pistons to show up for a 565 I am putting together to check piston to bore clearance. Cold cylinder walls and 2618 pistons like a little more wiggle room. Engines like a little more heat than open cooling as well.

 

[BamBam]

I'm not saying its the correct way, but I run a thermostat with two holes drilled in it. It has worked in my boat for the past 20 years. Holds most of the water back and lets enough through to cool the pipes and keep the water pump impeller happy until the t-stat opens. It will run with water temps around 180 at cruise. I also run the water through the exhaust manifolds first before the block. My oil cooler is a completely separate water system.

 

[mash on it]

Are you guys restricting water flow to keep heat in the engine instead of just running around at low temps?

Why are you worried about low temps?

It's been proven on the dyno that cooler water temps make horsepower.

110° with headers and 140° with manifolds is plenty.

180°+ is for smog car motors, not a boat.

Oil temps are more important.

Dan'l

 

[Bugginout]

Why are you worried about low temps?

It's been proven on the dyno that cooler water temps make horsepower.

110° with headers and 140° with manifolds is plenty.

180°+ is for smog car motors, not a boat.

Oil temps are more important.

Dan'l

I'm thinking about piston to bore clearance with colder cylinders? I'm at 4.600 and I am using mahle 2316 pistons that are specced with .0061 minimum clearance. They will be here Wednesday and I will mic them. I think I am just over thinking it right now.

 

[farmo83]

Yes

Long time family friend changed out his old cam driven to a new one(this was 25 years ago though). Wouldn't get over 110. We had Richard Lee(the builder) machine up some restrictor plates to hold water in. Worked great and still runs with them today.

 

[Bugginout]

Yes

Long time family friend changed out his old cam driven to a new one(this was 25 years ago though). Wouldn't get over 110. We had Richard Lee(the builder) machine up some restrictor plates to hold water in. Worked great and still runs with them today.

This is what I have been thinking about doing.

 

[poncho]

I'm not saying its the correct way, but I run a thermostat with two holes drilled in it. It has worked in my boat for the past 20 years. Holds most of the water back and lets enough through to cool the pipes and keep the water pump impeller happy until the t-stat opens. It will run with water temps around 180 at cruise. I also run the water through the exhaust manifolds first before the block. My oil cooler is a completely separate water system.

My family and I have been doing this for over 40 years, my flat runs 140-150 all day every day.

 

[farmo83]

This is what I have been thinking about doing.

Might need to be dialed in. I think he sent 3 sets and we tried all of them.

 

[River Runnin]

I run 160 all day long! .... Closed system!

 

[Bugginout]

I run 160 all day long! .... Closed system!

Havent looked into building closed system on my vdrive. My Domn8er obviously has closed cooling and it would be beneficial for my aluminum heads on the 565 I have going together for the vdrive.