New What's The Departure Betwixt A 428, A 428 Cobra Jet Together With A 428 Scj? Or The 429, 429 Cj

The CJ block differs from the apparently 428 due to the additional webs shape into the principal bearing saddles. 

The SCJ block is the same every bit a CJ, as well as to that they added 427 "LeMans" connecting rods, amend intake manifold, as well as an crude cooler, plus crank, rods, pistons, wrist pins, flywheel/flexplate

The 428SCJ was externally balanced amongst a counter weight behind a dissimilar harmonic balancer as well as an electronically balanced crank shaft  on the 428CJ


https://www.428cobrajet.org/cj-vs-scj
http://www.clubcobra.com/forums/fe-talk/10782-another-dumb-question-428cj-vs-428scj-whats-difference.html


If you lot believed the ads, you lot had to wonder how Ford sold whatever Cobra Jet as well as Super Cobra Jet engines at all. Compared to a apparently ol' Thunder Jet 429, a Super Cobra Jet would terms nearly $500 to a greater extent than as well as internet you lot fifteen advertised horsepower.

Fifteen.

You could instruct that from a fix of headers as well as a amend cam, as well as thus purchase a fix of viscid tires amongst the change.

For a 429 comparison

The measure 429, amongst two-bolt mains, 2.09/1.65 valves, 10.5:1 compression as well as a 600 CFM Autolite on top, was rated at 360hp @ 4,600, as well as a gut-busting 480-lbs.ft. of torque at 2,800 RPM.

Let us assume this is a existent number, as well as role it every bit a baseline.

If you'd b ought a Torino, for an extra $356, you lot could pace into a Cobra Jet.
You got a 700 CFM Rochester carb, slightly smaller combustion chambers as well as 2.24/1.72 valves inwards the heads, a compression bump to 11.3:1, as well as stronger main-bearing webbing.

Ford advertised it amongst a mere 10hp attain as well as a internet loss of torque--370hp @ 5,400 RPM, as well as 450-lbs.ft. (30-lbs.ft. less!) at 3,400 RPM.


From at that spot the pace upwards to the Super Cobra Jet packet inwards a Torino meant the 3.91 ($155) or 4.30 ($206) axle ratio.
The CJ's two-bolt mains laissez passer on means to four-bolt mains, the pistons are forged aluminum instead of cast, a 780 CFM Holley carb sits atop a bespoke intake manifold, there's an crude cooler hanging off the forepart of the radiator support, as well as a nasty solid-lifter cam requiring manual adjustment.

That's a lot of upgrading but to satisfy an axle ratio. There were likewise some external tells: a unmarried incoming fuel business versus the measure CJ's twin lines, a slightly dissimilar air cleaner. The result? Influenza A virus subtype H5N1 rated 5 horsepower at 200 to a greater extent than revs. Five. The torque numbers remained the same.

Funnier still, a cold-air intake was optional on both engines, as well as (if the paperwork is to live on believed) proffered no ability gain. None. If a solid-lifter cam as well as extra air from multiple sources isn't plenty to instruct to a greater extent than than 5 horses out of an engine, Ford's engineers should all lead keep been fired on the spot. If the measure CJ was a 400hp machine, we'd peg the SCJ at some 425 to 430.

a 460 crank inwards an SCJ volition instruct you lot 11.8:1 compression as well as 500 flywheel horsepower amongst few other changes

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