Normal Operating Temperature

kb228
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kb228
For those of you who have thermostrips on your radiators and cylinder heads, what temperatures do you typically run at after a moto?

Im curious as to which temperature is too high for a dirtbike. Streetbike fans usually kick on at 220F. Id imagine 230F is getting dangerous?
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Paw Paw 271
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Paw Paw 271 6/12/2019 7:24pm
6/12/2019 7:24pm
About 180.

Paw Paw
Brett Campbell 6/13/2019 9:26am
6/13/2019 9:26am
I am curious about a air cooled motorcycle at the cylinder head also!
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kb228
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kb228 6/13/2019 9:53am
6/13/2019 9:53am
Paw Paw 271 wrote:
About 180.

Paw Paw
Any concern about a bike running at 200-220? Debating on ordering a water pump and/or rad fan for my 450 for the woods. Small coolant loss, no major boil overs though
Paw Paw 271
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Paw Paw 271 6/13/2019 10:01am
6/13/2019 10:01am
You will most likely run hotter in the woods vs MX track. You need to keep it as cool as possible as too much heat will heat the fuel and could cause issues.
You may want to get a higher pressure radiator cap to help with coolant lose.
You may want to look into fuel tank insulators.

Paw Paw

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harescrambled 6/13/2019 4:00pm
6/13/2019 4:00pm
kb228 wrote:
Any concern about a bike running at 200-220? Debating on ordering a water pump and/or rad fan for my 450 for the woods. Small coolant loss...
Any concern about a bike running at 200-220? Debating on ordering a water pump and/or rad fan for my 450 for the woods. Small coolant loss, no major boil overs though
I run Evans Powersports coolant and a Trail Tech radiator fan on my 2018 CRF450RX. It runs in the 220-225 degree range on a bad day. I've set the fan to come on at 175.
project racer 6/13/2019 4:44pm
6/13/2019 4:44pm
As long as the water stays in it, 210-220 is ok.
Titan777
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Titan777 6/13/2019 7:26pm
6/13/2019 7:26pm Edited Date/Time 6/13/2019 7:27pm
Paw Paw 271 wrote:
You will most likely run hotter in the woods vs MX track. You need to keep it as cool as possible as too much heat will...
You will most likely run hotter in the woods vs MX track. You need to keep it as cool as possible as too much heat will heat the fuel and could cause issues.
You may want to get a higher pressure radiator cap to help with coolant lose.
You may want to look into fuel tank insulators.

Paw Paw
I was just looking into getting a heat shield for my tank. Does it matter if it's silver or gold? (I know the silver protects more).
What can happen if the tank/fuel gets hot?
kb228
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kb228 6/14/2019 3:01am
6/14/2019 3:01am
Paw Paw 271 wrote:
You will most likely run hotter in the woods vs MX track. You need to keep it as cool as possible as too much heat will...
You will most likely run hotter in the woods vs MX track. You need to keep it as cool as possible as too much heat will heat the fuel and could cause issues.
You may want to get a higher pressure radiator cap to help with coolant lose.
You may want to look into fuel tank insulators.

Paw Paw
Titan777 wrote:
I was just looking into getting a heat shield for my tank. Does it matter if it's silver or gold? (I know the silver protects more)...
I was just looking into getting a heat shield for my tank. Does it matter if it's silver or gold? (I know the silver protects more).
What can happen if the tank/fuel gets hot?
I just added heat shielding to my tank - my gas was boiling. It can cause the bike to just quit due to vapor lock.

Cyrca says silver is best.

What i did is went over to autozone and got a sheet of the thick shielding and a roll of the tape from Design Engineering.
eric513anderson 6/14/2019 7:20pm
6/14/2019 7:20pm
Run a good coolant like Engine Ice and maybe even get a Boyesen super cooler water pump
kb228
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kb228 6/15/2019 2:49am
6/15/2019 2:49am
Titan777 wrote:
Which product will be best for the tank and which one for the exhaust side panel?

http://designengineering.com/products/shields-reflectors/
The cool tape will work just fine. Youll need a couple rolls of it.

I saw procircuits tanks have that on there yesterday at highpoint. They didnt use the thick stuff like i did.

Now, you can buy actual kits, but theyre very expensive
Titan777
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Titan777 6/15/2019 8:35am
6/15/2019 8:35am Edited Date/Time 6/15/2019 8:37am
Titan777 wrote:
Which product will be best for the tank and which one for the exhaust side panel?

http://designengineering.com/products/shields-reflectors/
kb228 wrote:
The cool tape will work just fine. Youll need a couple rolls of it. I saw procircuits tanks have that on there yesterday at highpoint. They...
The cool tape will work just fine. Youll need a couple rolls of it.

I saw procircuits tanks have that on there yesterday at highpoint. They didnt use the thick stuff like i did.

Now, you can buy actual kits, but theyre very expensive
One roll of 2in x 15ft won't be enough? (the 30ft is over $40).
kb228
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kb228 6/15/2019 4:12pm
6/15/2019 4:12pm
Titan777 wrote:
Which product will be best for the tank and which one for the exhaust side panel?

http://designengineering.com/products/shields-reflectors/
kb228 wrote:
The cool tape will work just fine. Youll need a couple rolls of it. I saw procircuits tanks have that on there yesterday at highpoint. They...
The cool tape will work just fine. Youll need a couple rolls of it.

I saw procircuits tanks have that on there yesterday at highpoint. They didnt use the thick stuff like i did.

Now, you can buy actual kits, but theyre very expensive
Titan777 wrote:
One roll of 2in x 15ft won't be enough? (the 30ft is over $40).
Nope
harescrambled 6/16/2019 9:30am
6/16/2019 9:30am
eric513anderson wrote:
Run a good coolant like Engine Ice and maybe even get a Boyesen super cooler water pump
Engine Ice boils at 225F in the open per the MSDS...might want to rethink that
kb228
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kb228 6/16/2019 1:07pm
6/16/2019 1:07pm
eric513anderson wrote:
Run a good coolant like Engine Ice and maybe even get a Boyesen super cooler water pump
As ive been searching around online for guidance, many many people have been saying engine ice doesnt offer any cooling advantage. Hard for me to spend that kind of money on that. Suzuki engine coolant is like $6 at the dealership.
kb228
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kb228 6/16/2019 1:09pm
6/16/2019 1:09pm
Alright guys, million dollar question...

Whos water pump cools better? Boyesen or Pro Circuit?
harescrambled 6/17/2019 7:13pm
6/17/2019 7:13pm
kb228 wrote:
Alright guys, million dollar question...

Whos water pump cools better? Boyesen or Pro Circuit?
My own gut feeling is boyesen due to the smooth transitions. The PC pumps are CNC machined from billet, right? If so they still have the 90 degree bends, which theoretically reduce pumping effiency
ZB93
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ZB93 6/27/2019 7:01am
6/27/2019 7:01am
kb228 wrote:
Alright guys, million dollar question...

Whos water pump cools better? Boyesen or Pro Circuit?
After some pretty consistent boilover on my '17 250F (running Florida sand tracks in the summer) I went with Evans Waterless Coolant, CV4 hoses, CV4 high pressure cap and the Boyesen super cooler. No experience with the Pro Circuit pump, but I was impressed with Boyesen's construction and quality. The impeller itself is way bigger than stock and the impeller shaft is metal and replaces the flimsy stock plastic shaft that I have heard can snap and cause the bike to overheat without any real warning signs. It has eliminated boilover, and without comparing temps before/after, I can tell you the bike runs much more consistent and retains power where it would previously start to drop off after about 10-15 mins of hard riding in extreme heat. I would also consider the fuel you are running. Something from VP with a bit higher octane and RVP can prevent it from boiling in the tank and cut vapor lock issues. A splash of 110/C12 will help if you are running something with a low octane.

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kb228
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kb228 6/27/2019 7:23am
6/27/2019 7:23am
kb228 wrote:
Alright guys, million dollar question...

Whos water pump cools better? Boyesen or Pro Circuit?
ZB93 wrote:
After some pretty consistent boilover on my '17 250F (running Florida sand tracks in the summer) I went with Evans Waterless Coolant, CV4 hoses, CV4 high...
After some pretty consistent boilover on my '17 250F (running Florida sand tracks in the summer) I went with Evans Waterless Coolant, CV4 hoses, CV4 high pressure cap and the Boyesen super cooler. No experience with the Pro Circuit pump, but I was impressed with Boyesen's construction and quality. The impeller itself is way bigger than stock and the impeller shaft is metal and replaces the flimsy stock plastic shaft that I have heard can snap and cause the bike to overheat without any real warning signs. It has eliminated boilover, and without comparing temps before/after, I can tell you the bike runs much more consistent and retains power where it would previously start to drop off after about 10-15 mins of hard riding in extreme heat. I would also consider the fuel you are running. Something from VP with a bit higher octane and RVP can prevent it from boiling in the tank and cut vapor lock issues. A splash of 110/C12 will help if you are running something with a low octane.
Im running 93 pump gas right now. Ill give some 110 a shot. Have easy access to it. Right now my 450 runs at about 230F in the woods. Ill be pulling the trigger on the boyesen pump. It looks to be designed in such a manner to reduce turbulence in the coolant flow.
ZB93
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ZB93 6/27/2019 7:40am
6/27/2019 7:40am
I believe the 110 will help. I wish I had a picture of the inner face of the Boysen, it's very clean and smoothed out. Stock is cramped and sharp angles all over the inside. One of those parts where you wonder why OEM doesn't clean up their design.
c0ncEpT
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c0ncEpT 6/27/2019 1:26pm
6/27/2019 1:26pm
eric513anderson wrote:
Run a good coolant like Engine Ice and maybe even get a Boyesen super cooler water pump
harescrambled wrote:
Engine Ice boils at 225F in the open per the MSDS...might want to rethink that
With a 15psi cap that's like 260 degrees....
ZB93
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ZB93 6/27/2019 1:33pm
6/27/2019 1:33pm
eric513anderson wrote:
Run a good coolant like Engine Ice and maybe even get a Boyesen super cooler water pump
harescrambled wrote:
Engine Ice boils at 225F in the open per the MSDS...might want to rethink that
c0ncEpT wrote:
With a 15psi cap that's like 260 degrees....
Evans Waterless claims to "boil above 375"
Husky_250 6/27/2019 2:16pm
6/27/2019 2:16pm
I use just distilled water and Red Line Water Wetter mix.
kb228
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kb228 6/27/2019 6:27pm
6/27/2019 6:27pm
harescrambled wrote:
Engine Ice boils at 225F in the open per the MSDS...might want to rethink that
c0ncEpT wrote:
With a 15psi cap that's like 260 degrees....
ZB93 wrote:
Evans Waterless claims to "boil above 375"
Doesnt really matter what the coolant boils at. The bike shouldnt be boiling hot in the first place
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Falcon
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Falcon 6/27/2019 6:43pm
6/27/2019 6:43pm
c0ncEpT wrote:
With a 15psi cap that's like 260 degrees....
ZB93 wrote:
Evans Waterless claims to "boil above 375"
kb228 wrote:
Doesnt really matter what the coolant boils at. The bike shouldnt be boiling hot in the first place
Well, yes it does. If the water boils, it loses its ability to remove heat from the engine and it is completely worthless. Any fluid which boils at a higher temperature will continue to cool the engine as long as it remains in a liquid state. This is for a "worst case" scenario, of course. You are correct that the motorcycle should not be operating at or near boiling, however.
One thing to note: propylene glycol coolants like Engine Ice cool better at the limits because they bond to metal surfaces better than water or ethylene glycol do. As the product begins to boil, the PG fluids don't allow bubbles to get between the fluid and the inner radiator surface.
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Falcon 6/27/2019 6:43pm
6/27/2019 6:43pm
Also, propylene glycol won't kill your dog if he licks up a spill. Ethylene glycol most certainly will.

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