Out of pure interest and ignorance how come? (Like to learn)
Zxr 750 radiator options.UPDATED - PLEASE HELP ME.. AGAIN
Re: Zxr 750 radiator options.UPDATED - PLEASE HELP ME.. AGAI
Really.... never knew that.
Out of pure interest and ignorance how come? (Like to learn)
Out of pure interest and ignorance how come? (Like to learn)
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BrettZZR
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Re: Zxr 750 radiator options.UPDATED - PLEASE HELP ME.. AGAI
A thermostat is a valve that closes (just about) off the flow of coolant until the engine gets up to temp, and then opens to try keep the temp steady. In cool weather going down a long hill it might close again (almost) completely as the radiator cools the engine too much...
BUT... even when fully open, the thermostat is a bit of a constriction (bottleneck) and limits total flow through the system, so on the track where the heat load is at a maximum, and (specially on tight tracks) airflow through the radiator is up-and-down, then getting more coolant flow through the system is a good thing.
(-8
BUT... even when fully open, the thermostat is a bit of a constriction (bottleneck) and limits total flow through the system, so on the track where the heat load is at a maximum, and (specially on tight tracks) airflow through the radiator is up-and-down, then getting more coolant flow through the system is a good thing.
(-8
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greenman43
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Re: Zxr 750 radiator options.UPDATED - PLEASE HELP ME.. AGAI
That said, some engines need to have the coolant stay a bit longer in the rad - if it passes through too quickly, it doesn't shed enough heat. I have read of race cars using what's called an orifice plate: basically, a replacement for the thermostat itself, being a plate with a certain-sized hole in it.
Cheers,
Brian
Cheers,
Brian
07 ZX10R track 09 ZX6R road/track 93 ZXR750 race 89 GPZ900 project
Do not walk behind me, for I may not be leading
Do not walk in front of me, for I may not be following
Do not walk alongside me, for the path may be narrow
Just piss off and leave me alone
Do not walk behind me, for I may not be leading
Do not walk in front of me, for I may not be following
Do not walk alongside me, for the path may be narrow
Just piss off and leave me alone
Re: Zxr 750 radiator options.UPDATED - PLEASE HELP ME.. AGAI
yup... understood the workings of the thermostat but never really put all that together..
great info to know.. cheers...well my 2nd hand rad is here and just drying the paint... will try and fit it this week
great info to know.. cheers...well my 2nd hand rad is here and just drying the paint... will try and fit it this week
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BrettZZR
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Re: Zxr 750 radiator options.UPDATED - PLEASE HELP ME.. AGAI
Mmm, I've heard comments like this before, and I'm no expert, but it does not sound feasible to me. Passing through the rad slower to shed more heat would have the equal and opposite reaction of passing through the engine more slowly and gaining more?!greenman43 wrote:That said, some engines need to have the coolant stay a bit longer in the rad - if it passes through too quickly, it doesn't shed enough heat ...
I suspect that the orifice plate is more to provide some back pressure to the pump to prevent cavitation at high revs. That's the exact reason that I fitted a water pump from an Integra Type-R engine to my track car. It is driven by the cam belt and has 21 'teeth' instead of the normal 19 and requires a longer cam belt to suit.
(-8'