427 Cobra Specs??
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Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
427 Cobra Specs??
I was just wondering what the exact specs were on the 1966 427 the put in the cobra. I would like to know compression ratio, advertised HP & TQ, manifold type, carb size etc.. I have been playing with Desktop Dyno. I already have the exact cam specs. I know that motor is underrated but I'm beginning to think that underrated is an understatement. I have the actual flow numbers from a stock 428CJ head and ACTUAL numbers from the edelbrock heads not what they say they flow. Did the 427 heads flow better than the 428CJ heads?
Posting Guru
Joined: Oct 1999
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From: yes
427 Cobra Specs??
yeah, I think I can get a medium riser flow chart from a shelby catalog I have if you want it, but the medium riser is similar to the CJ, but it has 2.19 intake and I think 1.75 exhaust valves. Also a lot of the "427" cobra's never had a 427 in them, they were 428's, from what I've read he felt the average customer couldn't feel the difference. my opinion is that since both engines had more power than the car could handle why not go with the cheaper better street engine right?
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Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
427 Cobra Specs??
Don't get me wrong, the 428 was a great motor but I would be madder than a wet hen if I bought a cobra though to be a 427 and it turned out to be a 428. I think a 427 would much better suit the car anyway. Who needs all that off idle torque in a car like that? The 427 cam was seriously bigger therefore giving a meaner sound. The 428 wasn't really that hot of a motor. Maybe why it is considered one of the best STREET motors ever made.
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Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
427 Cobra Specs??
-------428CJ 30deg.seat--------Stock Ebok 30 deg.seat--
-lift--intake-----exhaust--------intake-----exhaust----
0.050---34.0-------20.8-----------34.8--------20.8-----
0.100---75.7-------46.0-----------69.9--------47.3-----
0.200--150.0-------84.8----------143.4--------91.2-----
0.300--202.0------118.1----------193.3-------123.8-----
0.400--228.1------145.3----------230.4-------153.6-----
0.500--235.8------162.7----------252.5-------182.2-----
0.600--242.9------173.9----------249.5-------197.8-----
0.650----------------------------252.5-----------------
0.700-------------181.2----------------------205.1-----
0.800----------------------------------------208.9-----
-lift--intake-----exhaust--------intake-----exhaust----
0.050---34.0-------20.8-----------34.8--------20.8-----
0.100---75.7-------46.0-----------69.9--------47.3-----
0.200--150.0-------84.8----------143.4--------91.2-----
0.300--202.0------118.1----------193.3-------123.8-----
0.400--228.1------145.3----------230.4-------153.6-----
0.500--235.8------162.7----------252.5-------182.2-----
0.600--242.9------173.9----------249.5-------197.8-----
0.650----------------------------252.5-----------------
0.700-------------181.2----------------------205.1-----
0.800----------------------------------------208.9-----
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Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
427 Cobra Specs??
-----Ported Ebok 30 deg.----------Ported Ebok 45 deg.--
lift--intake-----exhaust---------intake-----exhaust----
0.050---36.0-------25.6------------26.9-------25.6-----
0.100---72.1-------53.6------------61.7-------53.6-----
0.200--141.9-------97.0-----------129.3-------97.0-----
0.300--193.0------131.5-----------190.4------131.5-----
0.400--222.7------162.7-----------236.1------162.7-----
0.500--259.6------191.4-----------267.3------191.4-----
0.550-----------------------------281.3----------------
0.600--278.6------205.8-----------293.4------205.8-----
0.650--279.8----------------------302.8----------------
0.700-------------213.1----------------------213.1-----
0.750-------------217.6----------------------217.6----
lift--intake-----exhaust---------intake-----exhaust----
0.050---36.0-------25.6------------26.9-------25.6-----
0.100---72.1-------53.6------------61.7-------53.6-----
0.200--141.9-------97.0-----------129.3-------97.0-----
0.300--193.0------131.5-----------190.4------131.5-----
0.400--222.7------162.7-----------236.1------162.7-----
0.500--259.6------191.4-----------267.3------191.4-----
0.550-----------------------------281.3----------------
0.600--278.6------205.8-----------293.4------205.8-----
0.650--279.8----------------------302.8----------------
0.700-------------213.1----------------------213.1-----
0.750-------------217.6----------------------217.6----
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
427 Cobra Specs??
Are we talking about the overhead cam 427? Is that engine based on the FE block. What cars did that engine come in? Or was it strictly for race cars?
Just curious,
Greg
Just curious,
Greg
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Post Fiend
Joined: Feb 2001
Posts: 6,624
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From: Missouri
427 Cobra Specs??
The overhead cam 427 was definitely for racing only. It was based on the FE block. The one I'm asking about is just the regular 427.
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Tuned
Joined: Jul 2001
Posts: 430
Likes: 0
From: Deatsville, AL
427 Cobra Specs??
427s came in Ford and Mercury full size cars 1963-1968 although the 1968 427 are very rare, only had the single four bbl available (I have never seen one of these but it was an option); also Fairlane and Comets in 1966-1968 (the 1966 427 in these bodies was again very rare but is listed in the shop manual) and Mustangs and Cougars in 1968.
Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
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Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi
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