dennisgrimm
NAXJA Forum User
- Location
- Kapuskasing
Before you flame me, understand I am just asking a couple of theoretical questions out of general curiosity.
I understand why a v8 would have pushrods. That way you can minimize the number of camshafts you need. By why use pushrods in an inline engine? Really, doesn't using pushrods just add rotating mass, complexity, and cost? While we are on the topic of head design, why not use a crossflow head? Or more than two valves per cylinder? None of these design concepts are new; they were around long before the 4.0 (or AMC's first I6 in '58 for that matter). With an inline engine couldn't you make an engine that incorporates all of these design elements while using only one camshaft?
Don't get me wrong, I know that an OHC, crossflow head, and multiple valves only really make a difference in a high RPM engine. But why did AMC/Jeep/ChyCo make a less efficient than they had to?
I am sure the engineers that designed this engine did so for a good reason... I just don't know what it is.
I am done now, flame away.
I understand why a v8 would have pushrods. That way you can minimize the number of camshafts you need. By why use pushrods in an inline engine? Really, doesn't using pushrods just add rotating mass, complexity, and cost? While we are on the topic of head design, why not use a crossflow head? Or more than two valves per cylinder? None of these design concepts are new; they were around long before the 4.0 (or AMC's first I6 in '58 for that matter). With an inline engine couldn't you make an engine that incorporates all of these design elements while using only one camshaft?
Don't get me wrong, I know that an OHC, crossflow head, and multiple valves only really make a difference in a high RPM engine. But why did AMC/Jeep/ChyCo make a less efficient than they had to?
I am sure the engineers that designed this engine did so for a good reason... I just don't know what it is.
I am done now, flame away.