I've noticed that a number of folks are looking to drop the jet size
down in their Rochester B's, I assume to improve mileage. I was
thinking along those same lines until I came across this caution at
the back of Rochester's "The ABC's of Carburetion" (published around
1950 to 53):
"The practice of indiscriminately installing lean main metering jets
to improve economy is without basis. Lean jets are intended for high
altitude use only and will not improve mileage at average or sea
level altitudes. Excessively lean jets may result in burned engine
valves."
Just thought I'd pass that caution along for what it's worth. If
anyone has any information to the contrary, let me know, I'd love to
improve my mileage though not at the expense of my valves...
Barrett Revis
Sparks, NV
'53 3105
'48 3105
>Date: Wed, 11 Apr 2001 00:35:20 -0400
>From: "Mac Kinghorn" <kinghorn@granite.mb.ca>
>Subject: [oletrucks] Jet Source
>
>Hi All
>
>Craig was looking for Jets for his Rochester which has jets that are
>way to
>large. Well Craig our big swap meet is coming up on the May long
>weekend
>May 24 weekend and I should be able to pick you up some jets there.
>I will
>get several different sizes and send them down. The book says
>normal is to
>be a 52 size and you can go up or down from there. I am currently
>running a
>50 and I intend to drop it down to about a 45. Will let you know
>when I
>have them and get your address
>
>Mac
>52 Chev 1300
-- Barrett Revis, snappydog@jackass.net on 04/11/2001
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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