Direct Connection Cams

wyrmrider

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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 [email protected] [email protected]
note the difference at .200 and .275 where the real work gets done


MOON [email protected] [email protected] [email protected] [email protected] 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 [email protected] [email protected]

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
 
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