460 Stroker Camshaft Question

[410bruce]

Hey guys. I'm assembling a 532" stroker for my '74 Cougar and was curious if this cam would work decent in this application. If not, why?

Application: Ford big block 385 Series 429-460ci V8.Cam Style: Mechanical flat tappet
Basic Operating RPM Range: 3,600-7,000
Duration at 050 inch Lif 246 int./256 exh.
Advertised Duration: 282 int./292 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.563 int./0.583 exh.
Lobe Separation (degrees): 108
Intake Valve Lash: 0.026 in.
Exhaust Valve Lash: 0.026 in.
Computer-Controlled Compatible: No
Grind Number: F-246/3294-2-8
Valve Springs Required: Yes
Quantity: Sold individually.
Notes: Also fits 370 c.i.d. engines. 10.5 to 12.0 compression ratio advised.

Events @.050 In. 20/46 Ex. 61/15

Build specs.:
Pump gas.
9.7:1 compression.
Factory early D0VE-C heads with full port work and 2.20/1.71 valves. Ported and built by Scott Johnston.
Not sure on intake yet but most likely either a Ford Racing G 429 (Performer RPM) or a Torker II.
950 CFM Holley derivative.
Hooker Super Comp 1 7/8 headers.

C6 transmission. Torque convertor stall not yet determined. Rear gear not determined.
This will be a fun street car. Want a flexible engine, not a high RPM screamer, just a nice, usable performance engine.

I had this very cam in a 466 years ago in a daily driver truck. Probably only 9:1 compression but man, the thing ran great. As I recall, I had advanced it 4 degrees in that application.

Thanks guys!

[blykins]

Will it work?  Sure.  You could throw almost anything in there and it would work.  Will it be optimal?  No. 

Your heads will flow about 360 cfm at peak lift, but that peak lift is pretty far away from the lift on your cam.  At your lift, the heads will flow about 300 cfm.  So you have a pretty small cylinder head feeding a large engine.  It will be fairly short winded. 

Three things control where a camshaft will put the peak hp rpm:  1.  The displacement  2.  How well the cylinder heads work.  3.  If you have enough duration split for the engine to get the exhaust out efficiently.   

You say the cam did well in a 466, now you're adding about 70 cubic inches.  That will "dumb down" the cam by quite a bit.   Your heads work well, but they only do real well at .700-.800" lift.   In addition, the intake/exhaust duration ratio is pretty low, which usually necessitates a fairly large duration split.   FWIW, on the 520-530 ci BBF's that I do, most of them have 400 cfm heads at lift and it takes mid 240's on a hydraulic camshaft to get them to peak at around 5500-6000 rpm.   You're already losing effective duration because it's a solid cam. 

That's why I'm saying that it will work, but it's not optimal. 

[410bruce]

Brent, email sent.