August 1st, 2020, 06:01 AM | #1 |
ninjette.org member
Name: Emu
Location: Oklahoma
Join Date: Jun 2019 Motorcycle(s): 2011 Ninja 250r Posts: 55
|
Japanese guy adds sub radiator
https://www.youtube.com/watch?v=bCQz4NaJaPc
Looks like the japanese bro added a sub radiator to see how effective it would be at cooling his bike. He puts up hard numbers and graphs. All you guys who run new gens at the track, do you guys use a dual radiator? Would you consider it? |
|
August 2nd, 2020, 11:55 AM | #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
|
We removed one of the radiators from our CRF150R Supermoto to try to keep the temps up.
Running too cold isn't optimal. With the right tuning and engine oil, higher temps are safe and can make more power. |
|
August 2nd, 2020, 12:17 PM | #3 |
The Violet Vixen
Name: Yakaru
Location: Issaquah, WA & Las Vegas, NV
Join Date: Jun 2012 Motorcycle(s): Perigee (250), Hotaru (250), Saturn (300), Pearl (300), Zero (S1000RR), Chibi (Z125), Xellos ('18 HP4R) Posts: A lot.
MOTM - Jun '16
|
Depends on the engine. My hp4 gets a notable power gain with a subradiator to cool it better.
__________________________________________________
"most folks racing this bike get it in a competitive state of being with much less invested than you've already put in Saturn." - Alex |
|
August 2nd, 2020, 12:39 PM | #4 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
|
Yeah, varies depending upon engine design and usage. Typically keeping it within design-envelope of temps would be best.
My '08 race-bike's been through 3-years of racing with +40 track-days per year with factory radiator with thermostat and fan removed for more flow. Warm-up takes longer on cold-days, but it does fine on +110F days at constant full-throttle. I do occasionally see yellow warning-light go off at 230F. I do give it 5-minutes cruising at low-loads after each session to cool off. Ideally you want to run as high-temperature as materials can withstand. That's to reduce delta-T between combustion-chamber and surroundings which rob heat that could be used to expand combustion-gasses that push down piston. The more you cool combustion, the less pressure you have pushing down piston. That's benefit of thermal coatings on pistons tops, valves and cylinder heads, too reduce heat transferred away and keep it in combustion chamber. Honda's actually been experimenting with ceramic-based engines that doesn't use any coolant at all and runs at +1000 degrees. No heat-loss to coolant jacket and they're getting higher power and efficiency. |
1 out of 1 members found this post helpful. |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[motogp.com] - Nice guy turned nine guy: Dovizioso back on top | Ninjette Newsbot | Motorcycling News | 0 | November 2nd, 2016 05:31 AM |
[visordown.com] - Our Guy in India Guy Martin back on screens for 1000mile adventure | Ninjette Newsbot | Motorcycling News | 0 | January 27th, 2015 04:43 AM |
Red Hot Glowing Radiator Supports/Radiator Top | bluebr65 | 2008 - 2012 Ninja 250R Tech Talk | 10 | March 10th, 2012 10:05 AM |
[kropotkin thinks...] - Sending A Message: Honda Adds Two Japanese Wildcards At Moteg | Ninjette Newsbot | Motorcycling News | 0 | September 17th, 2011 05:10 AM |
[roadracingworld.com] - STAR Motorcycle School Adds Date At Heartland Park, Adds Inst | Ninjette Newsbot | Motorcycling News | 0 | July 13th, 2010 07:40 AM |
|
|