Yes, an A cam can be reground to B cam specs (or most any other specs) but the
base circle of the cam will be smaller than before. This will require doing some
close checking of the geometry between the cam and rockers to make sure the cam
lobe contact patch doesn't run off the pad on the rocker.
I think that should be 270 degrees AND 1/2 inch lift, not AT 1/2 inch lift. Most
cam manufacturers list a duration as measured at a certain lift, but it is
usually around .050". That means start measuring when the valve is open .050"
and stop measuring when it comes back down to .050".
You can verify the cam lift by measuring the height of the lobe and subtracting
the base circle diameter.
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Geegc@aol.com
> Sent: Tuesday, October 23, 2001 9:13 PM
> To: datsun-roadsters@autox.team.net
> Cc: jc1725@charter.net
> Subject: Cam Reground Question
>
>
> My son took the cam out of my black 68 2000 and noted that it said "A" on the
> end. I told him it was supposed to have had a reground cam in it, and I
> found in the PO's papers from Schneider Racing Cams in San Diego a reground
> spec sheet for a U-20, grind 270-80F.
>
> Question -- can an A cam be reground to a solex cam spec? The spec sheet
> says the intake is 270 at 1/2 inch valve lift, 340 cam lift and the exhaust
> is 280 at .488 inch valve lift, 330 cam lift.
>
> Does this make sense to anyone on the group?
>
> Thanks
>
> Gary C
> red one
> black one
>
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