September 2nd, 2014, 06:46 PM | #1 |
CVMA #717
Name: Angela
Location: Los Angeles
Join Date: Apr 2011 Motorcycle(s): '09 Ninja 250, '12 BMW s1000rr Posts: 28
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High Pressure Radiator Cap?
Removed the fan from the race bike. Having troubles with overheating. Anyone here running with a high pressure radiator cap? It increases the boiling point. If so, please let me know manufacturer, part number, cost, etc. The only ones I can find seem to be designed for mx. Thanks! (not interested in responses that suggest putting fan back on, I've already done the research on that).
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September 2nd, 2014, 07:36 PM | #2 | |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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Quote:
I wouldn't suggest a higher pressure radiator cap as a solution. You don't need the fan unless you are sitting on the grid - waiting - after the engine is already warm. But if the ambient temperature is high, and the engine is at full operating temp, and you are idling a while - you might. Check the mixture of your coolant. Altering the ratio of coolant to water will change the boiling point. Some coolants also claim to be able to lower the overall running temp. Have you replaced the thermostat? |
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September 2nd, 2014, 10:56 PM | #3 |
CVMA #717
Name: Angela
Location: Los Angeles
Join Date: Apr 2011 Motorcycle(s): '09 Ninja 250, '12 BMW s1000rr Posts: 28
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Flushed the coolant and filled with the proper mix of Water Wetter. Next step is to pull the thermostat completely, install the 1.6 radiator cap, and avoid idling especially after a session/race. And also hope for cooler weather once race season starts later this month at Chuckwalla.
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September 3rd, 2014, 02:02 AM | #4 |
ninjette.org member
Name: Tim
Location: NJ
Join Date: Sep 2013 Motorcycle(s): 2006 Ninja 250 Posts: 47
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Run straight water and/or bigger radiator. Being in LA and a race bike, I'm surprised you still run a coolant mixture.
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September 3rd, 2014, 06:48 AM | #5 | |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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Quote:
To the OP - Take a look at Engine Ice - http://www.engineice.com/. Also search and get some independent reviews. From what I've seen most all have been positive. I'm pretty sure it's legal on the track, but check first. I wouldn't remove the thermostat or increase the cooling system pressure. If this just happens after a race session there isn't a problem - you just need a fan if you are going to idle for any length of time after the engine is fully hot. |
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September 3rd, 2014, 06:50 AM | #6 |
ninjette.org member
Name: Mike
Location: Colorado
Join Date: Feb 2011 Motorcycle(s): '08 Ninja 25 (track), '02 Honda 919, '04 Honda NSR-50 (track) Posts: 20
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I've never run a fan on my race bike, and never had a problem overheating racing in 90-100 degree heat. The temperature readout on my Vapor Trail Tech usually stays under 200 degrees as long as you're moving. For coolant, I run distilled water mixed with Water Wetter according to the Water Wetter instructions.
But on the hot days, I do try and avoid much idling time on the grid. If there's an unexpected delay on the pre-grid or grid, I'll shut the bike off and restart it when they're ready. Oh, and one more thing... I installed some wire mesh covering the front of the radiator to protect it from rocks that the front tire flings up. Because of this my radiator is in pretty good shape, and doesn't have any dents or deformed fins. Last futzed with by mike_k; September 3rd, 2014 at 06:57 AM. Reason: added info |
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September 3rd, 2014, 08:48 AM | #7 |
ninjette.org sage
Name: Aaron
Location: Winder, GA
Join Date: Jun 2012 Motorcycle(s): 2013 Ninja 300 Posts: 718
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It's a give and take. Distilled water cools better than just about anything else you'd put in your bike, so if it's enough to get you under the lower boiling point (however unlikely that is in this case), it could help with overheating.
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September 3rd, 2014, 09:06 AM | #8 | |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
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or if you're rich, or beautiful, you can convince someone to point a leaf blower at the front while you're stopped.
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September 8th, 2014, 11:27 AM | #9 |
Fighting Texas Aggie '05
Name: Neil
Location: Hutto, TX
Join Date: Feb 2009 Motorcycle(s): '07 ZX6R, '08 Versys, '09 250R Track, '93 F2/F3 Track Posts: A lot.
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both true statements, hence distilled water with a lube/wetter/whatever is normally the go-to
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