Bernd,
I don't think the Crower rockers are SB Chevy rockers. I have a set of Crane
Gold SB Chevy rockers and the Crane set for the Magnums installed on my 95.
The rockers are the same and I did use a set of shorter pushrods on the 95.
Crower did tell me that the Magnum rockers are not Chevy rockers. I just
received my 1.7's from Crower and the pushrod seat in the rocker is higher
in the body than the Gold rockers that I have. Crower also calls for a
factory length pushrod for the Magnum install. What's most important is that
the tip of the rocker centers on the tip of the valve throughout the full
movement of the rocker arm. When I put my 95 back together, I tried the
factory on both an intake and exhaust valve, when the valves were at full
open, the tip of the rocker was almost off of the tip of the valve. I
switched to the shorter pushrods and resolved the problem.......
> -----Original Message-----
> From: Bernd D. Ratsch [SMTP:bernd@texas.net]
> Sent: Monday, October 25, 1999 8:05 AM
> To: dakota-truck@buffnet.net
> Subject: DML: RE: RE: RE: questions on roller rockers
>
> Frank,
>
> I own a set of Crower 1.6:1 Rollers installed on my V6 and noticed that
> they
> are also for the Chevy SB as well. Any pushrod changes required on those?
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@buffnet.net
> Subject: DML: RE: RE: questions on roller rockers
>
>
> Mike,
>
> A couple of suggestions on roller rockers for ya. The MP roller rockers
> are
> actually manufactured by Crane. Whether you buy from MP or Crane really
> doesn't matter. These rockers are actually SB Chevy 1.6 rockers. Because
> of
> this, they take a special pushrod. The pushrod they sell is actually a SB
> Ford pushrod and has a Tip to Tip length of 6.812, the factory Magnum
> pushrod has a Tip to Tip length of 6.900. Do not try to use the factory
> pushrods and use the pushrods supplied with the kit. The only company that
> I
> know that actually makes rockers specifically for the Magnums (not a
> rocker
> for a different type of engine) is Crower. My suggestion would be to
> always
> opt. for the higher ratio (1.7/1) unless your cam mandates less lift. The
> higher ratio translates into higher lift at the valve and the and the
> engines with factory cams benefit from this. If during installation, you
> find that the tip of the rocker doesn't ride pretty much centered on top
> of
> the valve, Crower does sell both longer and shorter pushrods. Your factory
> springs are more than sufficient with the factory cam and shouldn't cause
> any problems with the 1.6 or 1.7 rockers and are more than sufficient up
> to
> 5,500.......
>
> Frank
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