UK Karting - Notice Board (4-Stroke Karting) : Re: GX160 carb jets

Notice Board (4-Stroke Karting)

Re: GX160 carb jets
Posted by 'itpro' on 13 Dec 2014 @ 01:23

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itproJoined: August 2001
Total Posts: 6
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Let's not make this 'personal': it's just a fascinating subject for a cold, winter's-evening discussion! I will be delighted to be proven wrong and will say so, publicly, if I am.

E the T
***********

Can you tell us the amount of 'power loss' shown on the Dyno (in BHP or KW) when using 'thicker' oils, please? In that way, we can do the maths and discuss it more accurately. One 'proof' would be to test the engine temperature with the differing types of oil. If it's significantly hotter with 'thick' oil, then you will (probably) be shown to be right!

Knighty
**********

2) Were the engines tested by your colleague Multi-Cylinder? Did they have water cooling.... unlike the GX160s? Would the water in a water-cooled engine keep the maximum heat level to (roughly) 100 degrees (plus the amount for pressurising the water)? Does the GX160 have any similar mechanism to limit the temp to a theoretical 100 degree max?

Finally (and VERY pedantically) 'windage' is only correctly applied to Aerodynamics, not Fluid-dynamics. E.g., it describes the aerodynamic 'drag' on the part of the boat that is out of the water. Or the drag on the con-rod as it passes through the gasses surrounding it

The correct term for 'fluid drag' is something to do with 'Renold numbers' (if I remember my schoolboy physics from 46 years ago....) but I am not technical enough to know what the correct Fluid-dynamic term is! Perhaps that's why your colleague uses the term 'windage', too! See.... I told you I was pedantic ! Tee hee!

'Respect' to you both!

Ian

Message Thread:

GX160 carb jets by 'BigSlick' (10 Dec 2014 @ 20:58)

Re: GX160 carb jets by 'lard ass bob' (10 Dec 2014 @ 21:10)

Re: GX160 carb jets by 'Knighty' (11 Dec 2014 @ 13:11)

Re: GX160 carb jets by 'lard ass bob' (11 Dec 2014 @ 17:38)

Re: GX160 carb jets by 'Knighty' (12 Dec 2014 @ 11:13)

Re: GX160 carb jets by 'Mark 71' (12 Dec 2014 @ 12:48)

Re: GX160 carb jets by 'itpro' (12 Dec 2014 @ 14:17)

Re: GX160 carb jets by 'EtheT' (12 Dec 2014 @ 14:36)

Re: GX160 carb jets by 'Knighty' (12 Dec 2014 @ 15:07)

Re: GX160 carb jets by 'itpro' << You are here!

Re: GX160 carb jets cont.... by 'itpro' (13 Dec 2014 @ 1:32)

Re: GX160 carb jets cont.... by 'BigSlick' (13 Dec 2014 @ 17:33)

Re: GX160 carb jets cont.... by 'd-i-y71' (13 Dec 2014 @ 18:00)

Re: GX160 carb jets cont.... by 'BigSlick' (13 Dec 2014 @ 21:36)

Re: GX160 carb jets by 'PaulMRotax' (14 Dec 2014 @ 14:33)

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