Robmus Posted November 3, 2009 Share Posted November 3, 2009 Has anyone out there, apart from Sadler Vampire, had any experience with the HKS 700E engine from Japan? Link to comment Share on other sites More sharing options...
Robert Posted November 4, 2009 Share Posted November 4, 2009 Hi I am running one in a Savannah Bingo I am having a good run out of it uses between 8 to 11 ltrs/hr premium unleaded there is a HKS engine group in yahoo groups I wish HSK would bring out a 4 cyl version of the engine Link to comment Share on other sites More sharing options...
Brett Posted November 4, 2009 Share Posted November 4, 2009 there is a turbo version now I think I read about somewhere,, Link to comment Share on other sites More sharing options...
obad Posted November 4, 2009 Share Posted November 4, 2009 I have been using an HKS engine for the last 10 months in my own design single seat high wing tractor aircraft . It now has approximately 60 hours on the clock and is proving very satisfactory indeed. Gearbox ratio is 2.58 to one and the prop is a Brolga 68 inch three blade.The engine starts extremely well however there is more vibration and resonance than would be experienced with a Rotax 582 or 503. This however is less noticeable at higher RPM and it is very smooth at fast cruise ...5600 to 5800 rpm. There are quite a few low resonance RPM ranges as you change the throttle setting making it easy to select a good cruise RPM for any desired speed. Fuel consumption is excellent and in my aircraft at 60 kn it uses six and a half litres per hour and 9 1/2 at 80 kn. Almost no oil consumption. it is an engine that I have confidence in! I estimate the aircraft performs 10 to 15% better than it would with a 503. Link to comment Share on other sites More sharing options...
Robert Posted November 5, 2009 Share Posted November 5, 2009 Hi Obad Have you done a Carby balance on your HKS It could cure the low rev vibrations Link to comment Share on other sites More sharing options...
obad Posted November 5, 2009 Share Posted November 5, 2009 Robert. Yes I have balanced the carburettors fairly accurately. actually my engine idles very well and fairly smoothly, but vibrates more in the 2000 to 3500 rpm range. When I get the time and the inclination I may fit an exhaust gas sensor and attempt to tune the carburettors individually for a better result. In the meantime it is very satisfactory and I am enjoying flying my little machine greatly. Link to comment Share on other sites More sharing options...
Robmus Posted November 5, 2009 Author Share Posted November 5, 2009 Are you sure that there is not a prop balance problem at certain rev ranges? I am glad to see that there appears to be no bad stories of the HKS. I think I may get one to replace my 582. Link to comment Share on other sites More sharing options...
JG3 Posted November 6, 2009 Share Posted November 6, 2009 Twin cylinder 4-stroke, so one pulse per rev. Of course it's a bit rough at slow speed. Smooths out at speed tho, eh. Real good engine. Not quite the peak power of a 582, but better torque curve at cruise revs. JG Link to comment Share on other sites More sharing options...
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