Regarding the U20 cams, if a regrind is needed, Delta Cam in Tacoma, WA has
proper U20 grinds, developed using a Cam Doctor to plot out the proper ratio
etc. They can also regrind your rockers properly if needed. I am running a
somewhat hotter than Solex but still streetable cam in my U20 and am happy with
it. However, keep in mind that my motor is modified from stock, so I cannot
say how well it would work for anyone elses application.
Greg Burrows
DatsunDoc@aol.com wrote:
> The Isky U-20 cams are all based on L-series profiles developed in the early
>70's(they use the same master to grind the profile). They were developed for
>L16 and L24 engines. They will work in U-20 engines but the actual valve
>timing events will be different than advertized for L-series engines because
>the rocker arm ratio is less for a U-20 than L-series. Hence, less lift and
>less total duration. In fact, most aftermarket U-20 reground cams are ground
>with L-series profiles to them.
>
> Mike Unger
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