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Mech. Flat Tappet
Magnum/Xtreme Energy/Drag Race
 
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Instructions
 
Chrysler 383-440 c.i., 8cyl. 1959-80
Mechanical Flat Tappet Camshaft.
Application/
Camshafts		 RPM
Oper.
Range		 Camshaft
Part #		 Duration Valve Lift
w/1.5 rocker		 Lobe
Sep.
Angle		 K-Kit SK-Kit CL-Kit
advertised @ .050"
IN. EX. IN. EX. IN. EX.
Magnum
Good with stock converter & comp. Near smooth idle in 440. Works good with 650-750 CFM carb. Excellent torque. 2000
to
5500		 21-246-4
$125**		 270 270 224 224 .468 .468 110° K21-246-4
$415		 SK21-246-4
$270*		 CL21-246-4
$219*
Excellent solid for street/strip. 383 needs 2800 stall. 440 use 2400 stall, 700-800 CFM carb and headers. 2500
to
5800		 21-247-4
$125**		 282 282 236 236 .495 .495 110° K21-247-4
$415		 SK21-247-4
$270*		 CL21-247-4
$219*
Max street 383, 3500 converter. 10:1 comp, 750 CFM up and headers. 30000 stall for 440, 800 CFM 3.91-4.30 gear. 3000
to
6200		 21-248-4
$125**		 294 294 248 248 .525 .525 110° K21-248-4
$415		 SK21-248-4
$270*		 CL21-248-4
$219*
Serious street/strip effort for 440. 3500 converter. 10.5:1 and up comp. 800-850 CFM. 383 requires 4000 converter. 800-850 CFM, 10.5 comp up. 3500
to
6500		 21-249-4
$125**		 306 306 260 260 .555 .555 110° K21-249-4
$415		 SK21-249-4
$270*		 CL21-249-4
$219*
Xtreme Energy
Excellent for street and mild strip 2200+ stall or 4 speed. 1800
to
5800		 21-230-4
$125**		 268 274 230 236 .488 .501 110° K21-230-4
$415		 N/A CL21-230-4
$219*
Serious street. strip 9.5:1 compression with 2800+ stall. Strong mid range. 2200
to
6200		 21-231-4
$125**		 274 280 236 242 .502 .511 110° K21-231-4
$415		 N/A CL21-231-4
$219*
Very strong mid and upper RPM power 10 to 1 compression with 3000 stall. 2500
to
6500		 21-232-4
$125**		 282 290 244 252 .520 .540 110° K21-232-4
$415		 N/A CL21-232-4
$219*
Max effort street/bracket race cam 10.5:1 compression 2500 stall and low gears. 3200
to
7000		 21-233-4
$125**		 290 298 252 260 .540 .558 110° K21-233-4
$415		 N/A CL21-233-4
$219*
Drag Race
440 with 5000 stall, 513 gear, 11:1+ comp, 850+ CFM. 5000
to
7200		 23-630-5
$169**		 324 324 290 290 .650 .650 108° N/A N/A N/A
Good bracket cam, 10.5:1+ comp, 3500 stall in 440, 3800 in 383. 3500
to
6500		 23-631-5
$169**		 286 296 256 266 .550 .570 108° N/A N/A N/A
Best with 11:1 comp in 383 with 4500 stall, 4200 stall with 440. Strong mid range. 3800
to
6800		 23-362-5
$169**		 294 299 264 270 .567 .579 108° N/A N/A N/A
Good super street, Super gas or bracket cam Best with 12:1 comp in 440 with 5000 stall or 5500 stall in 383. 4500
to
7200		 23-633-5
$169**		 302 311 274 282 .590 .609 108° N/A N/A N/A
Good super street, super gas or bracket cam. Best in 470+ engines with 12:1 comp and 5500 stall. 5000
to
7500		 23-634-5
$169**		 305 320 279 287 .650 .630 110° N/A N/A N/A
notes: Except as noted, not legal for sale or use on pollution controlled motor vehicles.
* Stock Springs can NOT be used
** Single Bolt
 
 
 
 
 
 
 
 
 
 
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