compression check procedure ( update )

[joe williams]

results of my compression check (hot)
#1-154 #2-146 #3-154 #4-152 #5-154 #6-146 #7-160 #8-160

overall seems good to me.
any ideas on why #2 & 6 are a little low compared to the rest.

installed new plugs ( E 3.52 ) the old plugs-Bosch platinum looked good but were gaped .080
Joe
--
Joe Williams
1978 Royale rear twin

 

[jim kanomata1]

Seldom will the all read really close.
Drive it for few hundred miles and recheck and you might get different
result.
Re gap plugs to .040.

> results of my compression check (hot)
> #1-154 #2-146 #3-154 #4-152 #5-154 #6-146 #7-160 #8-160
>
> overall seems good to me.
> any ideas on why #2 & 6 are a little low compared to the rest.
>
> installed new plugs ( E 3.52 ) the old plugs-Bosch platinum looked good
> but were gaped .080
> Joe
> --
> Joe Williams
> 1978 Royale rear twin
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[john r. lebetski]

Is see E3 plugs. Personally I would never use those as you cannot set the gap. There is no way of knowing the equvelent working gap and how much
stress you are inflicting on the HEI. My two cents as I like to calibrate and recheck my work before moving ahead. As far as engine I would say if no
ticks or knocks leave it alone. You can tell a lot about health by sound.
--
John Lebetski
Woodstock, IL
77 Eleganza II