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Old 11-23-2010, 06:52 PM
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jamieson jamieson is offline
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Which cam for supercharged 440 on the street?

1973 Dodge Challenger. 440 with 6-71 supercharger. 440source aluminum heads. 1.5 aluminum roller rockers. 8.5:1 forged pistons. Stock forged crank. Either a 727 or A518 automatic; did not buy a TC yet, but thinking around 2400 stall and open to suggestions. 3.23:1 posi. I do not have tires / wheels yet. Will have P/B and A/C.

Car will be used on the street only so I need a reliable idle and enough vacuum for my brakes and A/C. I just need to to blow the doors off the imports that pull up next to me at stop lights.

I submitted this info to the COMP cams website and they suggested "part number 21-223-4 but I would ask for it to be custom ground on a 114 LSA to better accommodate the supercharger."

I then found a cam that seems similar but already has 114 LSA from Summit. The specs for both cams are pasted below. Would anyone recommend either of these or a different one? I have had decent luck with Summit cams in the past and am willing to use another one.

COMP CAM SPECS:
Brand
COMP CamsManufacturer's Part Number
21-223-4Part Type
CamshaftsProduct Line
COMP Cams Xtreme Energy CamshaftsSummit Racing Part Number
CCA-21-223-4UPC
36584046646

Cam Style
Hydraulic flat tappet
Basic Operating RPM Range 1,600-5,800
Intake Duration at 050 inch Lift 224
Exhaust Duration at 050 inch Lift 230
Duration at 050 inch Lift
224 int./230 exh.
Advertised Intake Duration
268
Advertised Exhaust Duration
280
Advertised Duration
268 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio
0.477 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio
0.480 in.
Valve Lift with Factory Rocker Arm Ratio
0.477 int./0.480 exh.
Lobe Separation (degrees)
110
Camshaft Gear Attachment
1-bolt
Computer-Controlled Compatible No
Grind Number CRB XE268H-10
Valve Springs Required Yes




SUMMIT CAM SPECS:

Brand
Summit Racing
Manufacturer's Part Number SUM-6401Part Type
CamshaftsProduct Line
Summit Racing® CamshaftsSummit Racing Part Number
SUM-6401

Cam Style Hydraulic flat tappet
Basic Operating RPM Range
2,000-5,500
Intake Duration at 050 inch Lift
224
Exhaust Duration at 050 inch Lift
234
Duration at 050 inch Lift
224 int./234 exh.
Advertised Intake Duration
282
Advertised Exhaust Duration
292
Advertised Duration
282 int./292 exh.
Intake Valve Lift with Factory Rocker Arm Ratio
0.465 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio
0.488 in.
Valve Lift with Factory Rocker Arm Ratio
0.465 int./0.488 exh.
Lobe Separation (degrees)
114
Camshaft Gear Attachment
1-bolt
Computer-Controlled Compatible
No
Valve Springs Required
Yes
Camshaft Manufacturers Description
Fair idle, good midrange power camshaft. Requires 9.5:1 and higher compression, 2,000+ stall, and gearing. Good mild bracket racing cam.Quantity




THANKS SO MUCH FOR ANY HELP!
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