Showing posts with label camshaft. Show all posts
Showing posts with label camshaft. Show all posts

Friday, December 26, 2025

Carbon fiber camshafts?


The weight savings alone might be an advantage, less rotational inertia means faster revs, quicker valve acceleration, and less parasitic loss. 

That translates directly to sharper throttle response and more usable RPM, not just dyno numbers. On top of that, carbon fiber doesn’t fatigue the same way steel does, and it can be engineered to dampen harmonics instead of amplifying them. Less valvetrain vibration = more stability at high RPM, less spring pressure required, and reduced wear everywhere else in the system.

Tuesday, January 28, 2025

I'm sure at least half of you are more familiar with cams that I am... so, you've probably already know about the Z/28 cam, that there were more than one, was a surprise to me. The one I just learned of is the "Z/28 Off Road Special" also known as the 140



designed for solid lifter above 3500 rpm, to 7k

First Design Off-Road cam, P/N 3927140 
Casting #3927141 
Intake 257 duration @ .050" (333 advertised)
 Exh. 269 duration @ .050" (346 advertised) 
Lift: .493" intake, .512" exhaust 
Intake Max lift @ 108 deg. ATDC
 Exhaust Max lift @ 116 deg. BTDC

 2nd Design Off-Road cam, P/N 3965754
 Casting #3965751
 Intake 248 duration (324 advertised)
 Exh. 267 duration (334 advertised)
 Lift: .512" intake, .535" exhaust