Thread: 428 vs 427
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Old 09-11-2011, 05:38 PM
olddog olddog is offline
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Join Date: May 2006
Location: St. Louisville, Oh
Cobra Make, Engine: A&C 67 427 cobra SB
Posts: 2,445
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One of the guys on club cobra who owns an original, sent me some PDF files that were copies of the original Shelby brochures.

I am pasting the 428:
428 CID Speclal Police Interceptor Ing'inc r'riih rnod'fii caticns
by Shel by Ameri can.
l^lat,er cooled, crst il"oir block witit 5 ma'in bear-ings
Sore 4.13 Siroke 3.9t] Dispjacetnent q28 cubic irrches-70l4cc
Compression ratio 10.0:l Carburet'ion 1-4V Ford
Horse power 390 @ 5200 RPM Torque 475 f t 1bs. @ 3700 RPM
tlec^urical system 12V battery, alternator
Va'l ve train - Pushrod, 0.1'1.V., l'lechanical l i f t e r s
Mi leage 9-12 MP0 Prenrium on'ly, reconmended

pasting the 427 street version:
Water-cooleVd -8,w ith cast iron block,5 main
bea ri ngs
Bore & stroke . .4.24 x 3.78 in, 107 x 96 mm
Displacement . . . . .427 cu in, 6998 cc
Compressiorna t i o . . . . . . . 1 0 . 4 t o o n e
Carburetion . .Two 4-bbl Holley
Valveg ear Pushrod-OHV
Horsepower (SAE) . . .425 bhp @ 6000 rpm
Torque . . 480ft-lbs@ 3700 rpm
Electrical system. . . 12-volt battery, alternator
Fuelrecommende. .d . . P r e m i u m o n l y
Mileage . . . . 9 . I 2 m p g

Pasting the 427 Competition:
Water cooled V-8, with cast iron block, magnesium
intake manifold, alloy cylinder heads,
lightweighvt alvesa nd alloy water pump.
Bore & stroke . .4.24 x 3.7B in
Displacement 427 cu in
C o m p r e s s i o n r a t i o . . . 1 2 . 4 : 1
Horsepower. . . . . . . 4 8 0 @ 6500 rpm
Torque 510 ft-lbs @ 3700 rpm
Carburetion .4 V Holley
w/center pivot float bowls

Last edited by olddog; 09-11-2011 at 05:43 PM..
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