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670 info

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Posted

Ok, you guys running the 670 are very quiet.

Leni and I have been dealing with a heating  problem. Other than that its is good.

Engine is very smooth and very powerful.

I went with  a new alum radiator and air scoop. Has 6 hrs on it now and last

flight went well no heating. Went back ton 6lb rad cap and it helped.

Whats up with you guys?  Bob

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Posted

I posted my experience a while back, needed lots of cooling, so I installed the belly radiator in addition to the two nose ones from my 582. Now I fly without concern, 175 degrees in climbout at 7000' and 95 degrees.

Otherwise the 670 is great, I get 500 to 600 fpm at 11000 ft density.

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Posted

How many hours on you setup now, nlappos?

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Posted

About 45 hours total. Great behavior on the engine, lots of power. I pulled off the exhaust Y and looked at the cylinder walls, still shows the original cross hatching and looks great. Starts perfectly. More fuel flow than the 582, I average about 6 gph at 90 mph at 9000 feet. Hacman works well. Very happy with the install.

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Posted

nlappos,  at what rpm are you getting 6gph. Don't know what mine is burning

we have finally found the reason for the overheating. the symptoms  didn't fit the

problem, burnt head gasket. flew it today, new gasket, temps stayed @160

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Posted (edited)

here are some photos, AK. I have a Northstar F210 boat fuel flow, which is great! 

Typically 8000 ft, 84 mph, 5800 to 6200 rpm, lean with the Hacman, 5.7 to 6.1 GPH

IMG_0985.JPG

IMG_1400.jpg

 

Edited by nlappos

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