Now that I know stock MEL block deck ht at cylinder center is about 10.90, I have new specs. 477 and 534 : 4.50 bore, 0.0033 deck clearance at valley side, 10.5033 block deck ht at valley side, 10.90 block deck ht at center. 477 MEL : 3.75 stroke, 1.875 piston pin ht, 6.75 I-beam con rod, 1.8 rod ratio. 534 MEL : 4.20 stroke, 1.68 piston pin ht, 6.72 H-beam con rod, 1.6 rod ratio. 477 and 534 heads : 2.30 intake valve, 1.90 exhaust valve, 2.20 valve stem center to center, 1.25 x 3.00 intake port, 1.25 x 2.50 exhaust port.
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Full page cross section illustration of MEL doesnt show crank center, but does show flywheel. Small protractor of mine perfectly fit flywheel, found center of crank. Careful measurements with 1/60 engineering scale, using 6.60 con rod as reference, and calculator. Cam to crank looks to be 5.36 not 5.28 as I said in previous post.
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Largest stock ports 1.25 x 2.70 intake, 1.25 x 1.90 exhaust. 477-534 intake port 1.25 x 3.00, 0.30 added to bottom of stock port. Valley pan eliminated, so only 1 gasket below intake port, not 2. Stock MEL block end rails bow down, 477-534 run straight across. 477-534 exhaust port 1.25 x 2.50, 0.60 added to top of stock port. Stock MEL top of exhaust manifold flanges level with valve cover rail, flanges taller on 477-534. Oil filter adapter moved around corner to FE spot. 477-534 sideoiler system. 477-534 larger timing cover without mechanical fuel pump. 477-534 timing gears - 1 on crank, 1 on cam, total 2. Reverse rotation roller lifter cam, with reverse angle helical gears on dist and cam. Cross bolted main bearing caps.
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They came in 4 displacements (actually 3) 401,477(475) and 534 cu.in. The 475 was a 477 but without the 50,000 mile warranty.
I read somewhere that the last model year for Super Duty engines was 1979/80.
What sticks in my mind was the size of the water pump it dwarfed the distributor. Also these engines used electric fuel pumps and most had electronic ignition (fired by points). I saw one being rebuilt and was amazed at just how diesel like the components were.
They also had an engine oil cooler cooled by engine coolant.
Never knew that MEL's were also Super Duty engines.
The first truck I drove in 1973 was a 1967 F-850 tandem dump truck with a 534 Super Duty @266 hp, and 5X4 transmission's.
As I remember it burned 100 gallons(imperial) or 125 US gallons of gas per day!!!
Same truck on same job but with 1160 Caterpillar 225hp diesel only burns 30 to 35 gallons!!!!!, and pulls grades faster...
No wonder with the rising price of fuel in the 70's the gas bombs were doomed.
So much for nostalgia
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