Gary,
i thought that was the case as well, But after talking to Mike Leach who has
been doing development with Dick Landy's shop Im wondering. Mike said that
on the OBDII trucks the cam (R/T package cam) made less HP than the 1.7
roller rockers. Cost is the same for cam kit and install time is a lot
longer. Love to see some dyno numbers on the two options and the options
combined.
BKB
-----Original Message-----
From: Gary Shook [mailto:gary.shook@mci.com]
Sent: Thursday, March 11, 1999 3:42 PM
To: dakota-truck@buffnet.net
Subject: Re: DML: Question on going faster
There was an article on the crane roller rockers in Mopar Muscle a while
back....
while there were modest gains for the 1.7 ratio (peak 7hp, average 5hp) on
the V6 they were testing, they agreed that the major benefit is better
stability at high rpm, especially with a more aggressive cam. (V8 should be
4/3rds that?, or about peak 9hp, average 7hp).
the HP/$ ratio is pretty low on this one... but if you want more rpm, they
would be a good idea... they did say that you must replace the springs with
the 1.7 ratio, but I don't remember why... they also tested the roller
rocker 1.6 ratio, which was pretty much a wash, since the stock ratio is
1.6...
I've also heard that the stock lifters are a real problem at high rpm...
they can crack the lifter bosses above 5800, or 5500 in the long term....
so that my have to be addressed if you want to rev... the first thing to be
addressed will be breathing....
Gary Shook
>1.7 roller rockers are a good idea. The springs will come in very handy
>when(if?) the MP comp's available as you will then be able to rev above
>6000.
>
<snip>
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