Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#3
12-23-2007, 10:02 PM
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Re: 427?
[ QUOTE ]
No,the 427 L-36/390HP & LS-1/335HP were both Hydra lifter engines. [/ QUOTE ] What about the L68 400 HP tri-power motor? I believe that is hydraulic camshaft also. But not sure. 
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 1969 SS396 Post Sedan Delivered to Van-T Topeka KS MCACN Day2 Concourse Gold Award 1965 VW El Lobo Dune Buggy built in the mid 70’s for the Iowa Shriners 1968 Schwinn Orange Krate 1969 Schwinn Pea Picker 1968 Schwinn 5-Speed 1970 Schwinn 3-Speed Deluxe 1972 Schwinn 10-Speed Continental 1973 Schwinn 5-Speed Suburban All Original Paint Bikes 
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#4
12-24-2007, 12:41 AM
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Re: 427?
The 512 block was used for 69 427 and continued into 70 as a 454. however, the 427 was internally balanced and the 454 was externally balanced. Because of that, the crank, balancer and flywheel must be for the correct application.
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#5
12-24-2007, 05:11 AM
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Re: 427?
[ QUOTE ]
The 512 block was used for 69 427 and continued into 70 as a 454. however, the 427 was internally balanced and the 454 was externally balanced. Because of that, the crank, balancer and flywheel must be for the correct application. [/ QUOTE ] I've seen this before so I thought I would ask. What is the difference between internal and external balancing?
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#6
12-24-2007, 06:24 AM
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Re: 427?
External balance used extra counterweights cast into the back side of the harmonic balancer, and the flywheel. Internal used counterweights on the crank, only.
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#7
12-23-2007, 09:50 PM
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Re: 427?
No. Correct me if I am wrong but I believe that oval port (low horsepower) head motors came with hydraulic lifters and rectangular port (high horsepower) motors had solid lifters.
I ran a comp cams solid lifter camshaft with my motor and loved it. I could not afford a roller cam but I still wanted it to rev fast. I called comp cams and gave them all the information that they needed to help me pick the correct application for my motor. I highly suggest doing that unless you are going to build the motor 100% stock. They will need to know compression, intake, carb, power brakes, gears etc...
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1969 SS396 Post Sedan Delivered to Van-T Topeka KS MCACN Day2 Concourse Gold Award 1965 VW El Lobo Dune Buggy built in the mid 70’s for the Iowa Shriners 1968 Schwinn Orange Krate 1969 Schwinn Pea Picker 1968 Schwinn 5-Speed 1970 Schwinn 3-Speed Deluxe 1972 Schwinn 10-Speed Continental 1973 Schwinn 5-Speed Suburban All Original Paint Bikes
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