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Re: Oil gallery question?????
Hotrod Lincoln #1411062 Sun May 23 2021 07:19 PM
Joined: Feb 2004
Posts: 23,644
H
Kettle Custodian (pot stirrer)
I'm thinking that hydraulic roller lifters on a solid lift cam will slightly increase the duration and lift, since the valve will actually begin the lift cycle on what's supposed to be the clearance ramp, and stay open a few degrees longer. I might have to do some tinkering with the opening point by using offset Woodruff keys on the cam and/or the crankshaft.
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

WAG MORE- - - - - -BARK LESS!
Re: Oil gallery question?????
Hotrod Lincoln #1411069 Sun May 23 2021 08:22 PM
Joined: Mar 2014
Posts: 2,606
J
'Bolter
Is there a roller cam grind which could be used instead of the solid lift cam, Jerry? Maybe with a shorter or reduced clearance ramp and a more pronounced dropoff? Or could the solid lifter cam be modified?


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: Oil gallery question?????
Hotrod Lincoln #1411071 Sun May 23 2021 08:33 PM
Joined: May 2001
Posts: 1,732
W
'Bolter
The lifter holes in my 261 are w/o lifters and exposed so I put in a strip of paper and pressed it with my finger. The indentation has a diameter of 1/2".

Attached Files
Gallery Diameter.jpg (15.06 KB, 65 downloads)

1948 3/4-Ton 5-Window Flatbed Chevrolet [sandeace.com]

28 Years of Daily Driving. With a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Re: Oil gallery question?????
Hotrod Lincoln #1411072 Sun May 23 2021 08:34 PM
Joined: Feb 2004
Posts: 23,644
H
Kettle Custodian (pot stirrer)
If there is (and I doubt if it even exists), it would be horrendously expensive. I recall seeing a roller cam blank for Chevy NASCAR engines on the shelf during a guided tour of Comp Cams' facility in Memphis. The blank, just a solid round billet of steel with a distributor gear machined on the end, was priced at $800.00. Grinding the customer's profile on it was extra- - - -a LOT extra! At that time, in the mid-1990's, a billet crankshaft from King's was priced at $5500.00, and a set of Carrillo connecting rods was about $1200.00. "It's expensive to go fast- - - - -how fast can you afford to go?"

I'm probably getting close to the maximum lobe lift anyway, since I've machined and ground the large cam bearing journals of the "Corvette/261" cam down to fit the 216 cam bearings. It fits, but just barely!
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

WAG MORE- - - - - -BARK LESS!
Re: Oil gallery question?????
Hotrod Lincoln #1411073 Sun May 23 2021 08:35 PM
Joined: Feb 2004
Posts: 23,644
H
Kettle Custodian (pot stirrer)
Thanks, Wally! That's what I thought, but it's good to have some confirmation!
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

WAG MORE- - - - - -BARK LESS!
Re: Oil gallery question?????
Hotrod Lincoln #1411075 Sun May 23 2021 08:52 PM
Joined: Dec 2020
Posts: 59
L
'Bolter
I went out today after I got home and my 59 235 has 9/16 oil galley. the soft plugs are the same size and look to be swaged in after installation, not punched but the entire diameter of the hole has a ring type swage all the way around. The galley is fed from both ends of the main bearings.

Re: Oil gallery question?????
Hotrod Lincoln #1411085 Sun May 23 2021 09:51 PM
Joined: May 2001
Posts: 1,732
W
'Bolter
Here's a picture of the gallery getting fed from each end like lumbersawyer said. It came from my copy of Motors Truck Repair Manual (1969 edition). I find this book very, very useful especially since my 1961 261 isn't in my 1948-51 shop manual.

The arrows showing oil flow are a bit small.

Attached Files
235-261 Oiiling System 2.jpg (130.54 KB, 53 downloads)

1948 3/4-Ton 5-Window Flatbed Chevrolet [sandeace.com]

28 Years of Daily Driving. With a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Re: Oil gallery question?????
Hotrod Lincoln #1411107 Mon May 24 2021 12:34 AM
Joined: Feb 2004
Posts: 23,644
H
Kettle Custodian (pot stirrer)
Gotta head to central Mississippi early tomorrow morning to look at a car that caught fire after Walmart put a new battery in backwards! I have feeling Wally World is in for an E$$$$$pensive problem with this one! I'll press on with making my block-drilling fixture whenever the boss cuts back on my road trip schedule a little.

I've got a couple of Motor manuals with the same diagram. Since there was never a hydraulic lifter version of the 216, the closest thing I can think of to compare with would be a 235 spray-oiler from an early Chevy Powerglide car.
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

WAG MORE- - - - - -BARK LESS!
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