I got this off my Y-block list that I just joined. It's about two Guys
fighting over why F*** didn't have an OH engine sooner. I was wondering
about the full-flow filter on early Chevy V-8's as not being so as he states
in letter. Is this true? Also, when did Lincoln goe to OH valve engines?
That's a new one on me.
"G"
-----Original Message-----
From: jrmummert@compuserve.com <JRMUMMERT@compuserve.com>
To: YBlock Mail <yblock@listbot.com>
Date: Monday, October 09, 2000 11:37 AM
Subject: Re: Overhead Valve Engines
>YBlock Mail - http://yblock.web-page.net
>
>Tim, don't let anyone mislead you into thinking that the bowtie stuff was
>technically advanced. Of course Ford had overheads in 52, the 215 6
>cylinder and Lincoln ohv's. The scrubs had overhead valves but they also
>had non pressurized lubrication to the rod bearings until 1953. Ever heard
>the term "dipper"? The rods had little scoops on the bottom that picked up
>oil from trays in the oil pan. That is why anyone racing a scrub in those
>days used a GMC 6 cylinder. scrubs in those days were known as "stove
>bolts" because the pan, valve cover ect. were assembled with stove
>hardware. Many young guys don't know that the first 2 years of the sbc
>didn't have a full flow oil filter. They actually designed a new engine in
>the 50's with by pass filtering. A small oil line ran oil to a firewall
>mounted filter them pissed it back into the valley area. The sbc was
>designed to be cheap to produce, PERIOD. The pressed wrist pins, ball and
>socket rockers, lack of a positive thrust on the cam and by-pass filtering
>were all cost cutting measures. Do you know why they sell cam buttons for
>sbc's? Because they had the genious idea to grind all the lobes on the cam
>to push the cam toward the rear. ( Fords have 1/2 the lobes tapered to the
>front, half rear and a thrust plate to poitively control cam thrust). This
>in theory would force the cam back so the cam timing gear would ride
>against the block. To take some load off, the distributor drive gear forces
>the cam forward. Here is where the trouble starts. At high rpm with a high
>volume pump the force of the distributor gear overcomes the lifter thrust
>and the cam begins to float front to back which causes the timing to
>wander, and worse things happen to the timing chain. Incidently, the
>bowties boys had a V8 in around 1920, it made less power than their 4
>cylinder and was discontinued. Ask your buddies why their emblem has no
>writting, similar to the 3 balls for a pawn shop or the striped barber pole
>which were used to attract the illiterate. As I like to say " the bowtie
>boys like their engines cheap and easy, just like their women" John M
>
>
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