wyrmrider
Well-Known Member
rev 3
Direct Connection , Mopar, Factory and other cams with about .008 duration checking
Engle, Isky Megacams
sorted by seat duration @.008 -
DRAFT DRAFT additions and corrections welcome
some other cams which are shown @.008 seat duration
This is the seat duration at .008 version of
https://www.forbbodiesonly.com/moparforum/threads/b-rb-standard-cams.153881/
rev-1 LA DC cams added and Engle KV series
There are three Engle series
Engle K grinds are new aggressive profiles designed for .904" diameter lifters and larger for use in high performance street & strip
There are three Engle series KV solid & hydraulic grinds are new aggressive profiles designed for .904" diameter lifters and larger. They are for racing only!
Isky Megacams are .842 lifter profiles- provided for cross reference only and because we sold a lot of them
Newer DC cams have .050 duration provided
DC did not provide with older cams, one way to tell the older cams
unwisely DC/ MP changed vendors and profiles but kept same descriptions
did change the part numbers
Note for example the DC 260 I measured at 261 @.008 but it's 269 @.006 if you want to compare with comp, lunati, howard
and it's 284 @.004 or at SAE to compare with Crane and the big production cams from Sealed Power, Melling, TRW, Wolverine, Elgin, Edelbrock, Summit, etc
Difference is even more with lazy factory grinds- less with more intense grinds
BVVC
we have established that Mopar seat durations are about .008 as are Engle (K) and close to Isky Mega
maybe some Crower but have not checked with them
Engle K grinds are new aggressive profiles designed for .904" diameter lifters and larger for use in high performance street & strip There are three Engle series
KV solid & hydraulic grinds are new aggressive profiles designed for .904" diameter lifters and larger.
They are for racing only!
Isky Megacams are .842 lifter profiles- provided for cross reference only and because we sold a lot of them
Newer DC cams have .050 DC did not provide with older cams
FROM HRM
An asymmetrical lobe refers to opening and closing ramps that are not identical. In order to maximize both valve speed and control, the lifter must be raised in a different manner from which it is lowered.
For example, in performance applications the valve is generally opened as quickly as possible, but the speed of the valve slows significantly as it nears maximum lift to keep it from lofting. Which is why you need to get your geometry correct
But on the closing side, the valve must be seated relatively gently to keep it from bouncing. An asymmetrical lobe design allows this.
370 240 318 71-82 some source, obviously incorrect
373/399 240/248 10 50 58 10 (20) 1970 318
373/399 240/248 10 50 52 16 (26) 1971 72 -76 shows 373/400
(overlap in -here- MOPAR degrees as found in FSM
Timing as found in FSM (sorta worthless without the checking height but does provide a basis of comparison)
395/395 240/240 10 50 50 6 (16)1970 /6
406/414 244/244 16 48 54 10 (26) 1971-76 /6
Three reference cams
458 305 246 @.008 [email protected] [email protected] [email protected] Mike Jones Special -asymetrical
430 DC 260 261 @.008 212 @.050 115@200 42@275
note the difference at .200 and .275 where the real work gets done
MOON [email protected] [email protected] 117@200 30@275 heavy vehicle cam 413 truck etc big nose
392/390 192/192 Cam Dynamics 15202 383 4bbl 315 Hp 2268405
405/410 240/248 204/211/24 110LCA P4452755 LA {10 50 52 16 (26) FSM}
410/412 252/256 16 56 60 16 (32) 360 stock PN 2566260 2 Bbl Cam
410 252 LA 360 PN 3512589 18 54 57 15 (33) FSM
410/411 {276/283-56 (@.006}) 197/199 -24 ovlap @.050 111 LCA mopar pn2806823
410 248/248-20 113 LCA DC P4286667 (1983 vintage) LA
410/425 248/256 (32) 202/202 110LCA P4452757AB P4452756 revised mopar data
410/425 248/256 211/218 110LCA P4452757 LA 1000-5000
410 248 20 overlap P4286673 B/RB DC 248-114 112icl P4286667 LA P4286673 B Eng.
410/412 252/256 16 56 60 16 (32) 1971 > 360
.410 210 PN 3512589 LA
.458" .305" 254° 209° K-52HYD ENGLE
435/435 256/260 18 58 66 14 (32)1970 383 390&300
425/435 256/260 18 58 66 14 (32) 1970 383 290/ 335 440/350 71 383/275/300 440 335
425/435 260/268 18 62 68 20 (38 ) 71 383-275 & 440-335
434/430 260/268 18 62 68 20 (38) 400 &440 72>>> 71 shows 425/435 for 383-335 and 440-425
.434. 2894/ 260 206 stock 440 intake
430 260/260 -34 DCcam LCA 113 P4286669 LA
430/430 260/260/34 221/221 113LCA
260/268 18 62 68 20 (38) 400 B stock cam
430/450 260/268/44 221/228 110 LCA P4452759 LA 1200-5000 mild comp -perf RV
470" .313" 260° 214° 127° K-54HYD ..
430 DC 260 measured 261 @.008 with cam doc 212 @.050 115@200 42@275
430 260 (34 ovlp) 113LCA P4286669 LA “DC260-113 110icl P486677 B/RB
450/450 264/264 214/214 108 2000-5800 Isky 264 Megacam
465/465 270/270 221/221 `108 LCA 2000-6200 Isky 270 Megacam 9-10.5 CR 3:70-4.11
429/442 279/290 -51 @.006) 210/220 -13 overlap @.050 Chrysler 2899206 1500-4500 Speed Pro CS 644 3675869
429/444 268/276/ 44 228/235/) 114 LCA P4452782 340HP idle-5800 ??? .050 numbers
429/444 268-/276 22 66 74 22 (44) Motor Manual
434/434 268/284 21 67 79 25 (46) 1970 383/335 B
450 268/284 PN 3512907 2843564 67 GTX/RT 4071002?
268/284 21 67 79 25 (46) FSM
450/458 268/284 208/221 115 LCA 21 67 79 25 (46) 113 ic 117 excl P4452783 B/RB
450/455 268/272 50 26 62 68 24 (50) 228/231/ 110 LCA 108 ic 112 excl P4452761 LA
450 268 / 284 PN 2899206 LA 340 22 55 74 22 (44) FSM
.504" .336" 268° 224° 140° K-56HYD .
455 272/272-48 LCA 112 DC some old sources
454/454 272/272/48 231/231 112 LCA 112 LCA 110 IC 113 Excl P4286677 B/RB (P4286671 LA 108 LCA)
455 272 (48) P4286671 LA D.C. 272-112 108 icl 26 66 70 22 (48)
520 347 272 224 K-56HYD .
347 272 224 K58
490/490 274/274 226/226 107 LCA 2200-6500 Isky 274 Megacam
514 ,343 276 230 148 (200) K-58HYD
460 276 340 Manual trans cam PN 3412044
444/453 276/284 114 112ICL LCA P3423044 68 340 MT
537 (358) 278 230 144 (KV-2 HYD
278 Hemi 33 69 59 33 (66) 255 @.050 108 straight up P4349259
485/485 280/280 232/232 108 LCA 2500-6800 Isky 280 Megacam
474 280/280/60 LCA 110 DC replaces street hemi purple shaft 1987
474/474 280/280 (60 ) 34 66 74 26 (60) 238/238/ 110 LCA 106 icl 114 excl P4445992 LA P4452993 B/RB
474 280 (60) [email protected] P4286630(A) newer profile D.C. 280-110 106icl P4386631 B/RB
470 284 P 3692013 LA Hemi profile from 70's P3690213 B/RB > P4286631
484 284 P4120234 B/RB recommended as largest street/ strip with auto - early cam
471/474 284-284-68 P3690214 B/RB Street Hemi Type from 70's
484 284/284/68 LCA 108 DC early
484/484 284/284/68 34 70 70 34 (68) 241/241 108 LCA 108 IC & excl P4120231 LA late DC street hemi profile P4120235 B/RB “DC 484”
484/484 284/284/ 56 241/241 114LCA P5007695 LA “improved driveability P5007697 B/RB
528 /528 284/284/60 LCA 112 DC Modified comp
471/474 GT112 109ICL P3690213 Street Hemi
P4120231 LA
.537 (.358) 284 235 (150 200) KV-3 HYD
534 356 285 238 152 K-60HYD.
485 286 108.5lca 108 icl Racer Brown SSH 25 B Eng. P3412073
485/510 286/292 108 P4007619 Racer Brown SSH-25-44
286 P3412073 old B/RB
517/517 3345 288 236 K7 hyd
534 356 288 238 K 60
552 (368) 288 242 (156 200) KV4-HYD
539 359 291 244 K-62
505/505 292/292 244/244 LCA 106 2800-7000 ISKY 292 Megacam
292 Hemi 38 74 74 38 (56) 109 straight up P4349257
508/508 292/292/ 76 248/248 38 74 74 38 108LCA P4121233 LA modified competition P4120237 B/RB ( “DC 509”
508/508 292/292/ 64 248/248 P5007936 LA “improved driveability P5007698 B/ RB (.509)
509/509 292/292 38 74 74 38 (76) 248/248 108 LCA 108 icl 108 excl P4120237 B/RB
.510 -----292 B/RB P3690812 old grind SSH-44-108 106 icl
509 292 P4120237 B/RB 4needs10 gears Largest for street/ strip manual trans – early grind
“DC509” 292 P 4120233 LA P4120231 D.C. 292-108
510 292/292 P3690812 Racer Brown AT B/RB 108 LCA 110ICL? SSH-44-108 LA P3690769
508 292/292/76 LCA 108 DC
539 359 294 244 156 K-62HYD here second number is cam lift
Direct Connection , Mopar, Factory and other cams with about .008 duration checking
Engle, Isky Megacams
sorted by seat duration @.008 -
DRAFT DRAFT additions and corrections welcome
some other cams which are shown @.008 seat duration
This is the seat duration at .008 version of
https://www.forbbodiesonly.com/moparforum/threads/b-rb-standard-cams.153881/
rev-1 LA DC cams added and Engle KV series
There are three Engle series
Engle K grinds are new aggressive profiles designed for .904" diameter lifters and larger for use in high performance street & strip
There are three Engle series KV solid & hydraulic grinds are new aggressive profiles designed for .904" diameter lifters and larger. They are for racing only!
Isky Megacams are .842 lifter profiles- provided for cross reference only and because we sold a lot of them
Newer DC cams have .050 duration provided
DC did not provide with older cams, one way to tell the older cams
unwisely DC/ MP changed vendors and profiles but kept same descriptions
did change the part numbers
Note for example the DC 260 I measured at 261 @.008 but it's 269 @.006 if you want to compare with comp, lunati, howard
and it's 284 @.004 or at SAE to compare with Crane and the big production cams from Sealed Power, Melling, TRW, Wolverine, Elgin, Edelbrock, Summit, etc
Difference is even more with lazy factory grinds- less with more intense grinds
BVVC
we have established that Mopar seat durations are about .008 as are Engle (K) and close to Isky Mega
maybe some Crower but have not checked with them
Engle K grinds are new aggressive profiles designed for .904" diameter lifters and larger for use in high performance street & strip There are three Engle series
KV solid & hydraulic grinds are new aggressive profiles designed for .904" diameter lifters and larger.
They are for racing only!
Isky Megacams are .842 lifter profiles- provided for cross reference only and because we sold a lot of them
Newer DC cams have .050 DC did not provide with older cams
FROM HRM
An asymmetrical lobe refers to opening and closing ramps that are not identical. In order to maximize both valve speed and control, the lifter must be raised in a different manner from which it is lowered.
For example, in performance applications the valve is generally opened as quickly as possible, but the speed of the valve slows significantly as it nears maximum lift to keep it from lofting. Which is why you need to get your geometry correct
But on the closing side, the valve must be seated relatively gently to keep it from bouncing. An asymmetrical lobe design allows this.
370 240 318 71-82 some source, obviously incorrect
373/399 240/248 10 50 58 10 (20) 1970 318
373/399 240/248 10 50 52 16 (26) 1971 72 -76 shows 373/400
(overlap in -here- MOPAR degrees as found in FSM
Timing as found in FSM (sorta worthless without the checking height but does provide a basis of comparison)
395/395 240/240 10 50 50 6 (16)1970 /6
406/414 244/244 16 48 54 10 (26) 1971-76 /6
Three reference cams
458 305 246 @.008 [email protected] [email protected] [email protected] Mike Jones Special -asymetrical
430 DC 260 261 @.008 212 @.050 115@200 42@275
note the difference at .200 and .275 where the real work gets done
MOON [email protected] [email protected] 117@200 30@275 heavy vehicle cam 413 truck etc big nose
392/390 192/192 Cam Dynamics 15202 383 4bbl 315 Hp 2268405
405/410 240/248 204/211/24 110LCA P4452755 LA {10 50 52 16 (26) FSM}
410/412 252/256 16 56 60 16 (32) 360 stock PN 2566260 2 Bbl Cam
410 252 LA 360 PN 3512589 18 54 57 15 (33) FSM
410/411 {276/283-56 (@.006}) 197/199 -24 ovlap @.050 111 LCA mopar pn2806823
410 248/248-20 113 LCA DC P4286667 (1983 vintage) LA
410/425 248/256 (32) 202/202 110LCA P4452757AB P4452756 revised mopar data
410/425 248/256 211/218 110LCA P4452757 LA 1000-5000
410 248 20 overlap P4286673 B/RB DC 248-114 112icl P4286667 LA P4286673 B Eng.
410/412 252/256 16 56 60 16 (32) 1971 > 360
.410 210 PN 3512589 LA
.458" .305" 254° 209° K-52HYD ENGLE
435/435 256/260 18 58 66 14 (32)1970 383 390&300
425/435 256/260 18 58 66 14 (32) 1970 383 290/ 335 440/350 71 383/275/300 440 335
425/435 260/268 18 62 68 20 (38 ) 71 383-275 & 440-335
434/430 260/268 18 62 68 20 (38) 400 &440 72>>> 71 shows 425/435 for 383-335 and 440-425
.434. 2894/ 260 206 stock 440 intake
430 260/260 -34 DCcam LCA 113 P4286669 LA
430/430 260/260/34 221/221 113LCA
260/268 18 62 68 20 (38) 400 B stock cam
430/450 260/268/44 221/228 110 LCA P4452759 LA 1200-5000 mild comp -perf RV
470" .313" 260° 214° 127° K-54HYD ..
430 DC 260 measured 261 @.008 with cam doc 212 @.050 115@200 42@275
430 260 (34 ovlp) 113LCA P4286669 LA “DC260-113 110icl P486677 B/RB
450/450 264/264 214/214 108 2000-5800 Isky 264 Megacam
465/465 270/270 221/221 `108 LCA 2000-6200 Isky 270 Megacam 9-10.5 CR 3:70-4.11
429/442 279/290 -51 @.006) 210/220 -13 overlap @.050 Chrysler 2899206 1500-4500 Speed Pro CS 644 3675869
429/444 268/276/ 44 228/235/) 114 LCA P4452782 340HP idle-5800 ??? .050 numbers
429/444 268-/276 22 66 74 22 (44) Motor Manual
434/434 268/284 21 67 79 25 (46) 1970 383/335 B
450 268/284 PN 3512907 2843564 67 GTX/RT 4071002?
268/284 21 67 79 25 (46) FSM
450/458 268/284 208/221 115 LCA 21 67 79 25 (46) 113 ic 117 excl P4452783 B/RB
450/455 268/272 50 26 62 68 24 (50) 228/231/ 110 LCA 108 ic 112 excl P4452761 LA
450 268 / 284 PN 2899206 LA 340 22 55 74 22 (44) FSM
.504" .336" 268° 224° 140° K-56HYD .
455 272/272-48 LCA 112 DC some old sources
454/454 272/272/48 231/231 112 LCA 112 LCA 110 IC 113 Excl P4286677 B/RB (P4286671 LA 108 LCA)
455 272 (48) P4286671 LA D.C. 272-112 108 icl 26 66 70 22 (48)
520 347 272 224 K-56HYD .
347 272 224 K58
490/490 274/274 226/226 107 LCA 2200-6500 Isky 274 Megacam
514 ,343 276 230 148 (200) K-58HYD
460 276 340 Manual trans cam PN 3412044
444/453 276/284 114 112ICL LCA P3423044 68 340 MT
537 (358) 278 230 144 (KV-2 HYD
278 Hemi 33 69 59 33 (66) 255 @.050 108 straight up P4349259
485/485 280/280 232/232 108 LCA 2500-6800 Isky 280 Megacam
474 280/280/60 LCA 110 DC replaces street hemi purple shaft 1987
474/474 280/280 (60 ) 34 66 74 26 (60) 238/238/ 110 LCA 106 icl 114 excl P4445992 LA P4452993 B/RB
474 280 (60) [email protected] P4286630(A) newer profile D.C. 280-110 106icl P4386631 B/RB
470 284 P 3692013 LA Hemi profile from 70's P3690213 B/RB > P4286631
484 284 P4120234 B/RB recommended as largest street/ strip with auto - early cam
471/474 284-284-68 P3690214 B/RB Street Hemi Type from 70's
484 284/284/68 LCA 108 DC early
484/484 284/284/68 34 70 70 34 (68) 241/241 108 LCA 108 IC & excl P4120231 LA late DC street hemi profile P4120235 B/RB “DC 484”
484/484 284/284/ 56 241/241 114LCA P5007695 LA “improved driveability P5007697 B/RB
528 /528 284/284/60 LCA 112 DC Modified comp
471/474 GT112 109ICL P3690213 Street Hemi
P4120231 LA
.537 (.358) 284 235 (150 200) KV-3 HYD
534 356 285 238 152 K-60HYD.
485 286 108.5lca 108 icl Racer Brown SSH 25 B Eng. P3412073
485/510 286/292 108 P4007619 Racer Brown SSH-25-44
286 P3412073 old B/RB
517/517 3345 288 236 K7 hyd
534 356 288 238 K 60
552 (368) 288 242 (156 200) KV4-HYD
539 359 291 244 K-62
505/505 292/292 244/244 LCA 106 2800-7000 ISKY 292 Megacam
292 Hemi 38 74 74 38 (56) 109 straight up P4349257
508/508 292/292/ 76 248/248 38 74 74 38 108LCA P4121233 LA modified competition P4120237 B/RB ( “DC 509”
508/508 292/292/ 64 248/248 P5007936 LA “improved driveability P5007698 B/ RB (.509)
509/509 292/292 38 74 74 38 (76) 248/248 108 LCA 108 icl 108 excl P4120237 B/RB
.510 -----292 B/RB P3690812 old grind SSH-44-108 106 icl
509 292 P4120237 B/RB 4needs10 gears Largest for street/ strip manual trans – early grind
“DC509” 292 P 4120233 LA P4120231 D.C. 292-108
510 292/292 P3690812 Racer Brown AT B/RB 108 LCA 110ICL? SSH-44-108 LA P3690769
508 292/292/76 LCA 108 DC
539 359 294 244 156 K-62HYD here second number is cam lift
Last edited:
