Adding a second Fan and front brake question - ZX6R Forum
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post #1 of 14 Old 02-19-2017, 08:53 AM Thread Starter
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Cool Adding a second Fan and front brake question

Ok I want to add a second fan to my 2006 636. I bought the bike for a stunt/bike lot bike. I was playing around yesterday and notice temps getting hotter then I want when im idling at 4k. My question is what fans will work for a secondary fan and will i have to build my own mounting hard wear for it or will it bolt up somewhere?

Second question front master cylinder is bad should i get an aftermarket one or try and find an oem front master? and any suggestions as to wich one to buy that is good and can take a lot of use and torture? thanks in advance......
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post #2 of 14 Old 02-19-2017, 09:35 AM
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09+ MC would be a good improvement.

Overheating would occur above 185 indicated. If you're worried, fit a radiator meant for a liter bike. More fin area will allow more cooling.... a bigger fan on the oem rad would increase air flow at slow speed better than a second fan, imho. Get one that flows more cfm, you'll pull more heat out of the coolant.

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post #3 of 14 Old 02-19-2017, 09:53 AM
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Ive always wondered.... why dont they put the fan in front of the radiator? It feels like a fan is a lot better at cooling things off when it blows at it rather than trying to suck the heat away. Am I not right??
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post #4 of 14 Old 02-19-2017, 11:48 AM
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Ive always wondered.... why dont they put the fan in front of the radiator? It feels like a fan is a lot better at cooling things off when it blows at it rather than trying to suck the heat away. Am I not right??
When I was working on telecom server systems, validating their designs.... the fans were always on the exhaust side of the air flow. I asked why, and the answer was that the fan motor adds heat to the airflow it is providing, so it's not going to cool quite as much if it is pressurizing the equipment, rather than putting lowering the pressure, drawing the air through the system.

Seemed like a pretty weak argument to me; a 12V fan, even pulling 4 amps is still only producing 50 W or so of heat. Compared to a 100+ HP engine, that's lost in the rounding error. Googling the conversion, 1 HP = ~750 Watts.... 100 HP would then be equal to 75 KW.... trying to shed an additional 50 W doesn't strike me as a big deal.

If you really want to make the radiator work more efficiently, you need to increase the pressure differential, so the air flows through it more strongly. Mr. Britten figured out that if you put the radiator just ahead of the back wheel, the partial vacuum caused by the body of the bike moving through the air would produce a differential twice as big as what is present in the 'normal' position in front of the engine.

Having the rad so close to the exhaust headers is a pretty poor choice as well..... if the bike is sitting still the superheated air wafting up from the pipes will be drawn through the rad, making it much less efficient than it could be......
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"Basic stuff fellas. Use your head for something other than to break your next fall."

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #5 of 14 Old 02-19-2017, 01:02 PM Thread Starter
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I can see the logic in this. Next question to that though how would that radiator from a liter bike mount up? seems it would be larger to me and not sit in there like it should. Idk mabey I am wrong.....?
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post #6 of 14 Old 02-19-2017, 01:05 PM Thread Starter
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i have also been thinking of putting some sort of shield infront of the headers there is a bunch of heat there coming off
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post #7 of 14 Old 02-19-2017, 06:37 PM
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More flow over just the fan section will only work to a point.
Once the flow over the radiator coil reaches it's limit your forced to use a bigger radiator or we stack coils behind each other.
You might try lowering the ratio of anti-freeze and add some water wetter, to add another fan the shroud would need to be altered for the second fan.

This is some of what they use for determining cooling, heating load's on heat exchangers.
https://www.enotes.com/homework-help...a-t-c-m-267828
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post #8 of 14 Old 02-19-2017, 06:59 PM
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Is it a common thing to have stunt bikes idling at 4K?
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post #9 of 14 Old 02-19-2017, 07:07 PM
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Is it a common thing to have stunt bikes idling at 4K?
Yeah they idle pretty high to keep from stalling on slow wheelies.

OP: What temp is it running at? If its running under 210*F its fine. My zx10r track bike ran 200-205*F on track and had no issues. Fresh coolant and a good quality oil will keep temps lower as well.
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post #10 of 14 Old 02-20-2017, 08:21 PM
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I installed a second fan on my R6 about 5 to 6 years ago. I used the same ideology as when building gaming PC's with my younger brother as far as fans, radiators, and cooling. One blowing air onto radiator and another pulling hot air from radiator. Obviously the fan blowing air was in the front and the fan pulling was in the rear. I ran an inline fuse from the battery to the fan with an on/off toggle switch which I mounted around the right side faring and up through to the dash so I could easily turn it on and off. It had an LED light on the switch so I could be doubly sure my deft ass wouldnt accidentally leave the fan on when the bike was off and come out to the discovery of a dead battery. The cooling effect was noticeable right away however I dont know if it would help in your situation where you are idling at 4k. Honestly I would look into distilled water with water wetter for cooling if you dont have to worry about freezing temps and all.
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post #11 of 14 Old 02-20-2017, 11:47 PM
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Front master replacement is in order. Or a big piston Brembo if you have money to throw away. No matter what you do, you cannot overcome the weak-ass Tokicos on 05/06. Switching to 07-12 Nisin calipers is your best money move. I can bring up the back wheel with 2 fingers since I switched. I do believe I got both calipers and master and I was able to use everything, although ASV had to send me an adapter for the brake lever.

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Free ball it. Then sell your used gear on ebay
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post #12 of 14 Old 02-21-2017, 03:48 AM
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why not flash your ecu and lower the temp that the fan kicks on?
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post #13 of 14 Old 02-21-2017, 06:08 AM
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They should be able to set you up with everything you need
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post #14 of 14 Old 02-21-2017, 01:07 PM
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Damage Control Parts ? Home

They should be able to set you up with everything you need
Seems they have faced the issue and overcome it

Here it is standing: atoms with consciousness; matter with curiosity. Stands at the sea, wonders at wondering: I, a universe of atoms an atom in the universe. - Richard Feynman
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@hellonearth good luck queer. I'll keep my dick crossed for you.
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U guys should see me shredding my flute. No homo!
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Free ball it. Then sell your used gear on ebay
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And look at those chicken strips too! What a squid!
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I hope your fork seals start leaking..........
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