11.5 x 17(or whatever atmospheric pressure is at your locale) =195.5 It does
not compute. Check your gauge.
Dave@Taos Garage Annex in Albuquerque
'59 AH :{) '54 BN1
----- Original Message -----
From "Larry & Sandi Miller" <millerls at ado13.com>
To: <spridgets@autox.team.net>
Sent: Thursday, November 01, 2001 3:16 PM
Subject: How Much Compression Is Too Much?
> Finally got around to doing a compression test on the 1275 Bugeye engine.
I
> used one of the rubber tipped gauges that you just press into the spark
plug
> hole and hold it there while you crank the engine. After two or three
> revolutions I can't hold the gauge in the hole, it just blows out with a
> loud pop. All four cylinders read around 250 lbs and might read higher if
I
> could hold the gauge in. Guess I will go down and buy one of the screw-in
> types and try to get a better reading.
>
> It really puts out a puff of air while cranking with all plugs removed. It
> is strong enough to move your hand when you hold it in front of the plug
> hole.
>
> This seems awful high to me. The guy that built the engine (I purchased as
> is) told me that the CR was 11.5-1.
>
> The engine is supposed to be 50 over with flat top pistons. It also has an
> aluminum head. I have not had the engine apart.
>
> Any thoughts?
>
> Larry Miller
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