Ron Earp
Admin
I saw an interesting piece in a magazine some years ago about a GM test mule pushrod engine with two cams in the block. Idea was to offer some variable valve timing but I never saw anything else about that design.
I recently read a small tech brief about the new Dodge Viper variable cam timing setup that was developed by Mahle. Looks really need with a solid cam inside a hollow cam so that the exhaust valve timing can be adjusted. A short SAE piece can be found here:
SAE Variable Viper Timing
Interesting technology. It'll be really neat if we see aftermarket kits to retrofit to old style pushrod motors but I imagine there would be a myriad of obstacles. There is mention of GM coming out with a variable valve timing system for their pushrod V8s. Again, Ford is left out as they don't even have a push rod program, instead banking everything on the complex, large, and expensive modular motors.
Ron
I recently read a small tech brief about the new Dodge Viper variable cam timing setup that was developed by Mahle. Looks really need with a solid cam inside a hollow cam so that the exhaust valve timing can be adjusted. A short SAE piece can be found here:
SAE Variable Viper Timing
Interesting technology. It'll be really neat if we see aftermarket kits to retrofit to old style pushrod motors but I imagine there would be a myriad of obstacles. There is mention of GM coming out with a variable valve timing system for their pushrod V8s. Again, Ford is left out as they don't even have a push rod program, instead banking everything on the complex, large, and expensive modular motors.
Ron