On Sat, 20 Sep 1997 22:11:43, -0500 GDWF22A(at)prodigy.com (MR RICHARD T
TRENK SR) writes:
> series V
> stock your regrind 1968 fast street/rally cam
>Intake/ open 29 btdc 17 35
>In/Close 63 abdc 53 65
>Ex/open 69 bbdc 60 65
>Ex/close 23 atdc 14 35
>lobe lift .300" .225" .435" (full race lift=
>.480")
I am at sort of a loss as far as this table goes.
The data that is shown as "Stock", looks quite a bit better than
what I invisioned the stock SV figures to be.
Bear in mind that I dont have a 1725 shop manual to check the
timing figures against.
Can somebody elaborate here?
Data that I do have, are for the series II stock and factory SII
Rally cam. The rally cam was sold by rootes in kit form for US
road racing, and gave a full 15 BHP boost over the standard cam.
Its power range was increased to 6000 RPM, so I would think
that The SV cam must be somewhat lighter in duration.
Series II SII Rally
Int Open 14 25
Int Close 52 59
Exh Open 56 63
Exh Close 10 21
I knew the SV cam was a tad better than the stock SII cam, but
I would have expected the SV cam to look alot more like the
stock SII specs.
Due to the table listed above, it still looks to me that the 17,53/60,14
camshaft to be that of the SV, and the 39,63/63,29 to be that of
a much higher performance regrind.
>actual lift there. Don't measure at the valve end as there may be a
>ratio
>in the rocker arms which multiplys the movement (I forget if this is
>true
>or not).
The rocker ratio has an aprox ratio of 1.39, which yields around .400
valve lift with a stock cam lobe of .300, or about .465 lift with the
higher
lift .335 lobe found on most perfomance regrinds.
Jarrid
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