Hi guys, in the middle of freshening up my 454 Alpha engine and wondered if this cam would be any good. Not looking for major performance, but a little would be nice!


Crane Cams Commander Camshaft

CCH-306-2

134571

Application

1967-1995 Chevrolet V8

396-402-427-454 ci

Hydraulic Lifters

Duration @ .050" Int/Exh: 246/254

Degrees Advertised Duration Int/Exh: 306/314

Degree Lobe Seperation: 112

Open/Close @ .050" Cam Lift Int/Exh: 16 64 / 50 10

Lash Hot Int/Exh: .000/.000

Gross Lift Int/Exh: .571/.585

Rough idle, performance usage, marine performance

Good upper RPM HP, 4000-4400 cruise RPM.

10.5 to 12.0 compression ratio advised.

Auto with 3500+ converter

Duration is to big unless you have dry exhaust and plan on spinning it 6500 rpms. And have money to keep replacing the Alpha outdrive everyweekend.

+1 too much duration,,if your looking for off the shelf cam for a 454 my customers and i have been vary happy with the isky 270/280 mega hyd cam..you can use it with stock manifolds and has a nice loppe idle but not to bad,,has real good midrange acceleration..

http://www.flatlanderracing.com/iskycamsmarine.html

Mrfix, how much horse power you getting with that cam?

Way too big of a cam for a 454. Better choice is a Crane 134241.

You need to have upgraded exhaust to run a bigger cam or you will get reversion.

i dont know the exact hp but in a 23' checkmate the boat ran 76 on the gps @ 5200 rpm's..same cam in a hallett with port work to the heads but through a volvo drive the boat picked up 4 mph,,in a 23'? mach one the boat went from 62 mph to 67 mph..it all depends on your set up in the engine..it has a nice idle and a snappy throttle response and pulls hard in every motor i put it in..

You can make 420hp with the cam I posted. Mill the heads .030, Holley 800 carb, Air gap intake and aftermarket exhaust.
I gave these specs to somebody a while ago and they dyno'd it at 425HP at 5000rpms. I used to spin mine to 5400rpms so it was probably closer to 435hp.
The cam is very close to the Merc 454/420hp specs.

I just bought this cam for my rebuild will I have and clearance problems with stock flat top pistons and 1.7 roller rockers?
Thanks
Jason

You won't have clearance issues with those cam specs.