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Summit 347 Stroker Block - Hands On

We decided to test-fit a 347 rotating assembly

By , Photography by Canon Timer

In the Mar. '10 issue, we test-fitted a Ford 347 stroker kit from Summit Racing in a 302 Windsor block we had pulled from a wrecked '73 Ranchero ("Garage Built Stroker"). The block wasn't a total junker. As a 302, it had been machined by our friends at JMS Racing Engines in El Monte, California, and run on the dyno, so we already knew the bores were 4.030 and the mains were straight. The 347 parts fit, but we had to clearance the block with the Makita, dingle-hone the bore, then hope we didn't damage the cam bearings during the process. It's a lot of work and maybe a bit over the head of the first-time engine builder but not all that difficult. Summit figured this out and came up with a solution. The company's 347 stroker block has been clearanced for the 3.400 crank, bored, align-honed, and even washed like that fancy lettuce you buy in the bag at the grocery store. We decided to test-fit the same 347 rotating assembly in the new block to see if we had to lift a finger to make things fit. We were also curious to see exactly what you get for just under $700.00.

Engine Specifications

Torque Specs
Main cap 65 ft-lb (with ARP moly lube and bolts); 85 ft-lb (motor oil and stock bolts)
Rod cap 50 ft-lb (3/8-inch ARP bolt and nut); 40 ft-lb (3/8-inch ARP cap screw); 20 ft-lb (stock); 0.0060-0.0067 bolt stretch

Engine Specs
Bore: 4.030
Deck: 8.200
Stroke: 3.400
Cubic inches: 347
Rod length: 5.400
Compression distance: 1.100
Valve relief: -5cc
Rod journal: 2.100
Main journal: 2.249

TOLERANCES
Main bearing clearance 0.0025-0.0030
Rod bearing clearance 0.0020-0.0030
Crank end play 0.0040-0.0080
Side clearance 0.010-0.020
PARTS LIST
DESCRIPTION PN PRICE
Summit Ford small-block SUM-150110 $689.95
Bolt protectors CLE-2800B1 2.39
SBF gasket set FEL-KS2328 59.25
Engine brush kit MRG-5192 26.75
4.030 ring compressor SME-904030 26.95
Outside micrometer SUM-900014 51.95
Rod bolt stretch gauge SUM-900015 64.95
Dial bore gauge SUM-900041 109.95
Engine stand drip tray SUM-901011 35.95
Balancer installer/remover SUM-G1025 94.95
Torque wrench (0-100) SUM-G1055 93.95
Engine assembly lube SUM-LUBE 1.95
Piston ring installer WMR-W80575 4.95
Eagle 347 FSB rotator ESP-B16422LA030 999.95
SOURCES
Summit Racing Equipment
PO Box 909
Akron
OH  44398
800-230-3030
330-630-0240
www.summitracing.com
Eagle Specialty Products (Rotating Assy.)
662-796-7373
http://www.eaglerod.com
JMS Racing Engines
El Monte
CA
626-579-4567
www.jmsracing.com
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