273 solid Crower cam opinions
Just an fyi someone just posted timing issues with their cloyes timing gears. Do a search on here and maybe give Cloyes a call. Just a heads up
Id be pirating the set out of my 318 thats atleast 10-years old, however it only has MAYBE 5000-miles on it. Its their old top-O-the-line double roller.
Smoother idle than what?
That's a pretty big cam for a 273.(59* overlap,67*ICA@108installed centerline) Lots of rumpity-rump.She'll burn some gas allright.
If you're gonna run logs, you might consider a split pattern cam with maybe 10 * more exhaust duration at 050, than what's on the intake.
And if you have a stick car, I would tighten up the LDA to 110/108
I would run as much lift as the heads will allow, and without getting into the pistons.
Im thinking custom cam, as previously mentioned. If you go that route, be sure to know your exact combustion chamber volume.
Smoother idle than the mopar '759 in my 318 but not as pathetically small as the stock commando cam. This cam has more LSA than the '759 and should be a smoother idle than that option. What I've seen is the lift on the Crower is just shy of where the heads hit peak flow and on PAPER there won't be an issue with valve to piston clearance.
Heres the '759 cam for reference
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,200-5,200
Intake Duration at 050 inch Lift: 221
Exhaust Duration at 050 inch Lift: 228
Duration at 050 inch Lift: 221 int./228 exh.
Advertised Intake Duration: 260
Advertised Exhaust Duration: 268
Advertised Duration: 260 int./268 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.430 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.450 in.
Valve Lift with Factory Rocker Arm Ratio: 0.430 int./0.450 exh.
Lobe Separation (degrees): 110
