Ring end gaps
02-24-2015 | 10:41 AM
#51
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From: Toronto, Canada
I have never seen an engine COME from the 3 I listed without a circulating pump. We did testing with crossovers using temp sensors on the blocks 20 years ago in real world conditions (out on the water in a boat). Shortly after I sent back all the crossover systems and have run circulating pumps on EVERYTHING I have built since. You would chit yourself if you did the same tests. There is a lot to be said about even engine temps not to mention it allows you to build a tighter tolerance engine that lasts longer. We are currently spending a ton designing a dry sump serpentine belt that uses a circulating pump for the engines we build. In the past we have altered the old Merc efi system to work but we are looking for something better.
02-24-2015 | 10:41 AM
#52
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From: chicago
I have never seen an engine COME from the 3 I listed without a circulating pump. We did testing with crossovers using temp sensors on the blocks 20 years ago in real world conditions (out on the water in a boat). Shortly after I sent back all the crossover systems and have run circulating pumps on EVERYTHING I have built since. You would chit yourself if you did the same tests. There is a lot to be said about even engine temps not to mention it allows you to build a tighter tolerance engine that lasts longer. We are currently spending a ton designing a dry sump serpentine belt that uses a circulating pump for the engines we build. In the past we have altered the old Merc efi system to work but we are looking for something better.
02-24-2015 | 10:49 AM
#53
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From: Toronto, Canada
I thought this was finally debunked in an infinate cooling supply system. IE: open system.
The faster the water flows, the more it will cool.
Just like air temp, add in some wind and heat is removed quicker.
Thus us in the North really only care about the Wind Chill index vs the actual air temp index.
Again, this is for open cooling systems. Not closed cooling.
The faster the water flows, the more it will cool.
Just like air temp, add in some wind and heat is removed quicker.
Thus us in the North really only care about the Wind Chill index vs the actual air temp index.
Again, this is for open cooling systems. Not closed cooling.
02-24-2015 | 11:01 AM
#55
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From: bel air, md
I have never seen an engine COME from the 3 I listed without a circulating pump. We did testing with crossovers using temp sensors on the blocks 20 years ago in real world conditions (out on the water in a boat). Shortly after I sent back all the crossover systems and have run circulating pumps on EVERYTHING I have built since. You would chit yourself if you did the same tests. There is a lot to be said about even engine temps not to mention it allows you to build a tighter tolerance engine that lasts longer. We are currently spending a ton designing a dry sump serpentine belt that uses a circulating pump for the engines we build. In the past we have altered the old Merc efi system to work but we are looking for something better.
02-24-2015 | 11:11 AM
#56
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Joined: Jun 2012
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From: OK CIty, OK
I thought this was finally debunked in an infinite cooling supply system. IE: open system.
The faster the water flows, the more it will cool.
Just like air temp, add in some wind and heat is removed quicker.
Thus us in the North really only care about the Wind Chill index vs the actual air temp index.
Fitting example right now being in the very NE.
Again, this is for open cooling systems. Not closed cooling.
The faster the water flows, the more it will cool.
Just like air temp, add in some wind and heat is removed quicker.
Thus us in the North really only care about the Wind Chill index vs the actual air temp index.
Fitting example right now being in the very NE.
Again, this is for open cooling systems. Not closed cooling.
Last edited by Cole2534; 02-24-2015 at 11:31 AM.
02-24-2015 | 11:31 AM
#58
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From: michigan
02-24-2015 | 11:41 AM
#59
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From: Toronto, Canada
agreed.. Mike I kinda derailed myself here cause I was thinking about something I've encountered with mine... in that a 2 stage pump running all in and all out isn't making "MY" 1100s run hot enough, slowing the flow down with use of some restriction achieved this and also increased my system pressure as well...
02-24-2015 | 11:47 AM
#60
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From: OK CIty, OK
My new engine has a crossover without a bypass. However, I'm not sure it will stay that way.
Brian could you elaborate on your testing? Did the crossovers you used have bypasses with thermostats, or were they just a crossover?
With unlimited cooling water routed through a single pass exchanger (block/heads/etc) and no control the engine will NOT be a uniform temp. It's simply the physics of heat transfer that the exiting water will be warmer than the entering water and the block's temp will vary in accordance. Now add in a thermostat, and it gets much better. I'm not convinced the thermostat temp really even matters, so long as it's a constant temp, all else can be allowed for.
Brian could you elaborate on your testing? Did the crossovers you used have bypasses with thermostats, or were they just a crossover?
With unlimited cooling water routed through a single pass exchanger (block/heads/etc) and no control the engine will NOT be a uniform temp. It's simply the physics of heat transfer that the exiting water will be warmer than the entering water and the block's temp will vary in accordance. Now add in a thermostat, and it gets much better. I'm not convinced the thermostat temp really even matters, so long as it's a constant temp, all else can be allowed for.
