Sean,
The 1.7 rockewrs do not alter the duration, only the cam lobe can do that.
KW
Sean_Meldrum@ittauto.com wrote:
> >The Mopar grind cam is very small liftwise .. Isn't the gross lift
> >.470something on the highside with a 1.6 ratio rocker? That gives you
> roughly
> >.294 or so on the cam ...... which comes out to be right under .500 which
> >should still be safe ....
>
> >FYI, I run a cam with .512 gross valve lift w/1.6s on my 5.9L, no
> problems...
>
> That's what I originally thought too. If someone is running this
> combo then trust that more than this info that was given to me. It was
> probably Crower that provided this info. Could have been tryin' to sell
> the regrind.
>
> Possibly the extra duration along with the increased lift causes
> trouble.....I'm not runnin' either of these so, again, trust someone who
> is.
> >If someone can give me specifics on why you shouldn't run a 1.7 with the
> mopar
> >grind I'd like to know b/c I have a friend with a 5.2L 98 Dak with a very
> >similar (if not exact) grind and he's got 1.7s on order.
>
> As with any cam swap where the p2v clearance could be an issue the only
> sure guarantee is to check. I hope I just didn't pass bogus info on to you
> guys...only something I was forewarned of. Wouldn't be the first time I
> stuck my foot in my mouth. 8^)
>
> *** 97 RPM Dakota - 14.98 @ 91.76 *** http://surf.to/real-per4mance ***
>
> sean meldrum
> Email @ Home: spm@c3net.net
> Email @ Work: sean_meldrum@ittauto.com
> Truck mods: http://www.geocities.com/MotorCity Downs/7875/signature.txt
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