Actually, if you measure the duration @ .050 inch valve lift, you will
actually see a slight increase in duration with the higher ratio rockers. It
usually amounts to somewhere between 5 to 10 degrees depending on the ramp
of the cam.....
Frank
> -----Original Message-----
> From: Meseika, Raymond V [AMSTA-AR-QAA] [SMTP:meseika@pica.army.mil]
> Sent: Friday, April 09, 1999 11:26 AM
> To: 'dakota-truck@buffnet.net'
> Subject: RE: DML: A big cam w/stock 98-99 computer?
>
> Brian,
>
> I agree with Bill the duration will remain the same but the lift through
> out
> the operation range will be increased.
>
> Ray Daddy Long Legs
>
> This and 50 cents will get you a cup of coffee!
>
> Soon to be a proud owner of a Black on grey CC SLT+ Loaded with 5speed and
> 3.92ra
>
>
>
> > -----Original Message-----
> > From: William Blount Arthur [SMTP:m990198@nadn.navy.mil]
> > Sent: Friday, April 09, 1999 1:20 PM
> > To: dakota-truck@buffnet.net
> > Subject: Re: DML: A big cam w/stock 98-99 computer?
> >
> > Brian, the rockers should only multiply the lift, not duration, I mean
> the
> > lifters still run right off of the cam which has its lift multiplied by
> > the rocker ratio. The duration has to do with the shape of the lobe.
> >
> > Bill
> > '97 SS/T
> >
> > > With 1.6 rockers, the stock cam has ~200 degrees duration(only
> guessing
> > > here...). Now that means that with 1.7 rockers, it has 215 degrees of
> > > duration at the valves. Since there seem to be a good number of guys
> > >
> > > Brian
> > >
> > >
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