442 stock 455 cam specs for an auto car 0.050

Old August 26th, 2015, 12:22 PM
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442 stock 455 cam specs for an auto car 0.050

What was stock 442 cam specks measured at 0.050? I can only find advertised specs. What does this translate to ? Stock auto 455 442?The numbers can be approximations I don't need accurate!
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Old August 28th, 2015, 02:08 PM
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As I know it the @.050 specs are 233/233, on a 113 lsa. Hope this helps.
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Old August 28th, 2015, 02:23 PM
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The 233 deg at .050" cam was the 308 deg. W30 and W31. Standard 442 cams had less duration at .050" lift. There would be several possibilities, none of them anything spectacular.
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Old August 28th, 2015, 05:41 PM
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Hi Joe, I show two cams for the hi-perf 455's. One, #402194, is for the 390 HP, the other is #402569. This is for the W-30 unit!

The 402194 specs are: (.050") 232*/232*x (Adv.) 308*/308* x .474"/.474" x 113* LS.

The 402569 specs are: (.050") 244*/244* x (Adv.) 328*/328* x .475"/.475" x 110* LS.

Thanks, Gary in N.Y.

P.S. Not sure about your combo, but generally speaking the smaller cam would have somewhat better "manners".
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Old August 28th, 2015, 09:06 PM
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These are from the 1970 service manual.



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Old August 28th, 2015, 09:28 PM
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Originally Posted by GOSFAST View Post
Hi Joe, I show two cams for the hi-perf 455's. One, #402194, is for the 390 HP, the other is #402569. This is for the W-30 unit!

The 402194 specs are: (.050") 232*/232*x (Adv.) 308*/308* x .474"/.474" x 113* LS.

The 402569 specs are: (.050") 244*/244* x (Adv.) 328*/328* x .475"/.475" x 110* LS.

Thanks, Gary in N.Y.

P.S. Not sure about your combo, but generally speaking the smaller cam would have somewhat better "manners".
These are the W31 & 4spd W30 cams respectively.
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Old September 2nd, 2015, 03:34 PM
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Anybody know plain Jane automatic 455 cam specs??
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Old September 2nd, 2015, 03:55 PM
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Originally Posted by joepenoso View Post
Anybody know plain Jane automatic 455 cam specs??
What year?
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Old September 3rd, 2015, 06:12 AM
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1971 auto, no air cam specs at 0.050?
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Old September 3rd, 2015, 01:14 PM
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I found this a 442.com

Over Duration Lift
Year Part # lap Int./Exh. Int./Exh. Application
1964 387484 52 278/282 .430/.432 330 Police Pursuit
577994 36 250/264 .380/.390 330 2BC, D88 2BC

1965 387484 52 278/282 .430/.432 400, 330 4BC ST,425 ex Starfire
388992 47 278/282 .430/.432 J88 4BC, 330 4BC AT
558528 36 250/264 .387/.388 330 2BC
388828 50 286/280 .427/.461 425 Starfire

1966 588528 36 250/264 .387/.388 330 2BC
388992 47 278/282 .430/.432 330 4BC AT
387484 52 278/282 .430/.432 425 ex Starfire
388828 50 286/280 .427/.461 425 Starfire
393964 52 278/282 .430/.432 400 AT ex. OAI
393859 58 286/286 .472/.472 400 ST ex. OAI
390961 55 281/282 .472/.472 Toro
397328 82 308/308 .474/.474 400 OAI (W-30)

1967 396188 36 250/264 .387/.388 330 2BC lo-comp
396192 47 278/282 .430/.432 330 4BC AT,400 4BC AT x OAI
397744 36 250/264 .435/.435 400 2BC
393964 52 278/282 .430/.432 330 4BC ST, 425 ex. S/F, Toro
396190 50 286/280 .472/.461 425 Starfire, Pol.
396961 55 281/282 .472/.472 Toro
393859 58 286/286 .472/.472 400 ST ex. OAI
397328 82 308/308 .474/.474 400 OAI (W-30)
230328 82 308/308 .474/.474 400 OAI w/ 16 valve springs

1968 393859 58 286/286 .472/.472 400 ST ex. OAI
402486 48 262/274 .440/.440 400 AT ex OAI, 350 w/ 269 Pol.
400117 44 258/272 .435/.435 455 Irrig, Mar, hi-comp ex Pol.,
Toro, hi-perf.
400084 36 250/264 .400/.400 350 ex. OAI
402194 82 308/308 .474/.474 350 W-31, Hurst ex CAC Casting #389410
400165 57 285/287 .472/.472 455 Pol, Toro W-34, Hurst CAC
402569 108 328/328 .475/.475 400 OAI after 1-1-68

1969 393859 58 286/286 .472/.472 400 AT, W-32 OAI
400165 57 285/287 .472/.472 455 Pol, Toro W-34, F-85, Hurst,
455 Mar 4BC hi-perf
402486 48 262/274 .440/.440 3269 AT, 350 Pol.
402194 82 308/308 .474/.474 350 W-31 OAI
400117 44 258/272 .435/.435 455 ex. Pol., Toro, hi-perf.
402569 108 328/328 .475/.475 400 OAI ex. W-32
400084 36 250/264 .400/.400 350 ex. OAI

1970 393859 58 286/286 .472/.472 350 4BC ex. AT, OAI, hi-perf
400084 36 250/264 .400/.400 350 2BC, 4BC AT
400117 44 258/272 .435/.435 455 ex. Pol., Toro
400165 57 285/287 .472/.472 4257, 67, 4400 AT, Toro W-34
402486 8 262/274 .440/.440 455 Toro ex. W-34
402569 108 328/328 .475/.475 455 4400 ST OAI (W-30)
406768 68 294/296 .472/.472 455 4400 ST ex. OAI
402194 82 308/308 .474/.474 350 W-31 OAI

1971 400084 36 250/264 .400/.400 350 2BC, 4BC AT
400117 44 258/272 .435/.435 455 Toro w/2.73 axle, 455 ex 400 or
Perf. Eng.
400165 57 285/287 .472/.472 455 4400 OAI w/AC, 4400 AT
402486 48 262/274 .440/.440 350 4BC ST,455 Toro w/3.07
409691 61 286/287 .474/.472 455 4400 ST, AT OAI ex AC
409717 32 250/264 .400/.400 350 5400
409759 68 294/296 .472/.472 455 4400 ST OAI (W-30)

1972 400084 36 250/264 .400/.400 350 L34, 350 AT L32, 33 All
400117 44 258/272 .435/.435 455 All 4BC AT, Marine LC
402486 48 262/274 .440/.440 350 F-85 4BC ST (L34), Marine
409691 61 286/287 .474/.472 455 L75 ST,L77 AT, Marine HC
409759 68 294/296 .472/.472 455 F-85, 455 ST OAI (W-30)

1973 400084 36 250/264 .400/.400 350 L32, L33, L34
400117 44 258/272 .435/.435 455 AT, Marine, 455 LC
402486 48 262/274 .440/.440 350 ST M15, M20
409691 61 286/287 .474/.472 455 4BC, L77, Marine

1974 409691 61 286/287 .474/.472 455 AG37, 455 W-30, Marine
455 (also #562302)
400117 44 258/272 .435/.435 455 ex W-30, Marine, 455 LC
(Also #562303)
400084 36 250/264 .400/.400 350 (Also #562299)

1975 550638 28 242/250 .396/.400 260
400084 36 250/264 .400/.400 350 (Also #562299)
400117 44 258/272 .435/.435 455 (Also #562303)
409691 61 286/287 .474/.472 455 Marine (Reg.)
402486 48 262/274 .440/.440 350 Marine
409759 68 294/296 .472/.472 455 Marine Hi-perf.

1976 550638 28 242/250 .396/.400 260
400084 36 250/264 .400/.400 350
402194 82 308/308 .474/.474 455 Marine Hi-perf. F.P.
409759 68 294/296 .472/.472 455 Marine Hi-perf.
409691 61 286/287 .474/.472 350 and 455 Reg. Perf. Marine
400117 44 258/272 .435/.435 455 All, Irr., ex Marine

1977 562298 52 256/277 .247/.250 260 (thru 1982)
562299 36 250/264 .400/.400 350, 403 (thru 1980)
562301 68 294/296 .474/.472 403 Hi-perf. Marine thru 79
562302 61 286/287 .472/.472 350, 403 Reg. Perf Marine, ST thru 79

Notes: Overlap is in degrees.
Olds rates duration at zero lift, while most cam manufacturers rate duration at .050" lift.
ST = standard trans
AT = automatic trans 2BC/4BC: 2 or 4 barrel carb
OAI = outside air induction

Roller lifters and cams were in all 1986 and up 307's, and most 1985 307's. An easy ID is the heads. 5A heads have no roller lifter, 7A heads have the roller lifters. These lifters are of 0.921" variety.

[ Thanks to Chris Witt, Greg Beaulieu, Tom Lentz for this information ]
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Old September 4th, 2015, 05:34 AM
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Correction Randy, Olds rated their ADVERTISED duration at .000 lift. Comp, Lunati and most others rate it at .006, Crane and Erson as well as most of the generics rate theirs at .004.
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Old September 4th, 2015, 12:49 PM
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All I did was copy it. I didn't add anything to it.
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Old September 8th, 2015, 07:21 AM
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Thanks svnt442 .......
that 71 cam 285-287 degrees at .472 lift is the cam measured at .000 lift. At 0.050 it would be approximately 205 degrees at .472 lift.......? Correct??
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Old September 11th, 2015, 07:20 AM
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Does anybody venture a guess at what this cam is at 0.050?
Thanks
joepenoso
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Old September 11th, 2015, 10:17 AM
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Originally Posted by joepenoso View Post

Thanks svnt442 .......
that 71 cam 285-287 degrees at .472 lift is the cam measured at .000 lift. At 0.050 it would be approximately 205 degrees at .472 lift.......? Correct??

Does anybody venture a guess at what this cam is at 0.050?
Thanks
joepenoso
I have the same question about the Olds 286/286 .472 cam used in 68-69 400 4 speed 360 hp 400 and 70-1/2 350 310 hp 4 speed

MY answer or guess is that being as I suspect Pontiac and Olds advertised duration is likely rated in the same manner or very close and the Pontiac cams I do know the @050 duration I will just share that a Pontiac 288/302 cam is 212/225 so I would suspect the Olds 285-286-287 would be a touch less maybe 208-212 is my guess. Also a Pontiac 308/320 cam is 231/240 and an Olds 308/308 cam is know at 233/233 , Olds 328/328 is 244

You dont hear much about this Olds cam

406768 68 294/296 .472/.472 455 4400 ST ex. OAI

Seems it might be a nice cam for some that want something milder but OEM in place of a 308/308 or a 328/328

Seems to be some variation in the 308/308 cam with the folks that repop it. I have seen it listed as 232/232, 233/233 and 234/234 @050

Last edited by GEARMAN69; September 11th, 2015 at 10:33 AM.
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Old September 12th, 2015, 01:40 PM
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Thanks Gearman 69
I think that's as accurate an answer as I'll get short of measuring it myself
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