The testing method is also important. Some say that a maximum of 3 kicks some say 4. But given 20 kicks a worn out engine will reach it's maxiumum presure. It is important to allwys use the same 3 or 4 kicks.
Also the first kick should read at least 1/2 of the final reading. If you get 70psi after 4 kicks you should see at least 35 on the first.
51/3 Compression meas. & cruising speed info
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Koray PARS
Re: compression
I read 70 in first kick, then after 4 its 80 in one side 90 in other.
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Garnet Grylls
Re: compression
70 on the first kick is excellent. I don't think your problem is engine condition.
You said that timming is right on. Did you check that it is advancing to F mark as well? If you can reach 135k I would think it is OK as well.
My Bing handbook shows that the R51/3s have the slide needle clip in the 1 or top position. This is the leanest midrange setting. If you are at sealevel this may be too lean. Try moving up one position and see how things work.
You said that timming is right on. Did you check that it is advancing to F mark as well? If you can reach 135k I would think it is OK as well.
My Bing handbook shows that the R51/3s have the slide needle clip in the 1 or top position. This is the leanest midrange setting. If you are at sealevel this may be too lean. Try moving up one position and see how things work.