Well Cris the the best? engineered rocker system to date is the rocker
shaft system, which the 235 came with standard equiped. The weak point in
the overhead valve train is the pushrods.With good rocker arm face grinding
and polishing, spring pressures of 100# or less on seat and no coil bind
when full open and proper oiling [the root of most rocker failures] the Chev
system should last forever. You asked about supercharging, Most cams have
what they call overlap, this is a point in the cam cycle where both in and
ex are offseat for over 100 degrees, this purges and cools the cylinders.
As old Chevs go I have a 1946 1 1/2T old model 235 with unknown miles that
the original owner used Havoline oil, when I took the head off for a valve
job the rockers and shaft were in perfect shape. A lot of old timers used
non-detergent oil in their old Chevs because the oil consumtion was less.
This was a false economy as they were slowly pluging the oiling sys which
only had 15# pressure to begin with. These old Chevs will consume oil
through the valve guides unless you modernize with valvestem seals. I hope I
helped answer some of your questions.
Lee
----- Original Message -----
From: "Christian Pointer" <kissaki@highstream.net>
To: <oletrucks@autox.team.net>
Sent: Monday, December 08, 2003 2:42 PM
Subject: [oletrucks] Roller rockers in a 235?
> Hello fellow gear heads. I have my 235 block out for machining and total
> overhaul. And I was just thinking, has anyone ever put roller rockers
> in a 235? Are the arms the same from the SBC? it seems that if this
> could be done with a bit of machining it might be worth doing. Ideas?
>
> Also anyone ever seen one with a blower? Turbo? are cam grinds different
> for blown motors?
>
> Thanks in advance.
>
> Christian
> in Everett, WA
> 1953 Chevy Panel
> 1951 3100 parts
> 1950 GMC 100 for sale
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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