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Old May 8th, 2012, 10:00 AM   #1 (permalink)
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Question Stock camshaft specifications for a 1971 auto. non w-30 442(455)

Does anybody know what the 0.050 duration, lift, etc was for a 1970-72 auto. non w-30 442(455)?? I know the "308 cam had 232 duration and .475 valve lift at .050

thanks
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Old May 8th, 2012, 03:01 PM   #2 (permalink)
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Factory specs are found here. http://www.442.com/oldsfaq/ofcam.htm#Cams
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Old May 9th, 2012, 08:37 AM   #3 (permalink)
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How can you translate subjective 286 -287 advertised duration and .472 lift from the advertised numbers to objective 0.050 numbers.

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)
Thanks
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Old May 9th, 2012, 08:45 AM   #4 (permalink)
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Yeah, I wondered about this myself once.
I don't know whether I ever really got an answer...

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Old May 9th, 2012, 07:40 PM   #5 (permalink)
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Question

Anybody??
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Old May 10th, 2012, 06:37 AM   #6 (permalink)
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See if you can chase down "cutlassefi" (Mark). He makes a living with cams. Hey Mark! Are you out there?
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Old May 10th, 2012, 07:15 AM   #7 (permalink)
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Quote:
Originally Posted by zodiacblueS View Post
See if you can chase down "cutlassefi" (Mark). He makes a living with cams. Hey Mark! Are you out there?
He sure does and would probably start off with "those old Olds grinds are pretty lazy" .

Actually, many years ago i got some "duration at .050" information on two of the smaller cams on that list:
The 400117 258/272 455 4v cam was 194/207 at .050
The 402486 262/274 350 4v cam was 196/208 at .050

With the 328 cam at 244 or so and the 308 cam at 232, maybe the 409691 286/287 cam is somewhere around 220 at .050 (?). Obviously, just a wild guess on my part.
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Old May 10th, 2012, 09:34 AM   #8 (permalink)
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Question

Thanks for the advice ....I was aware of the 308 and 328 cams being 234 and 244 at 0.050 repectively. I think the non 442 had timing like 215 at 0.050 but that;s a wild guess because the rest of the Olds line was Luxury and not "Sporty" like 442's. I am just curious what the stock specs were and how much they changed with the reduction of compression in 1971-72
Thanks
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Old May 10th, 2012, 07:51 PM   #9 (permalink)
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For whatever it's worth, I decided to expand on Joe's post, and post the entire cam spec list from the tech section, for easy reference.
I cleaned up some of the abbreviations a bit.

There are typos in 1969 and 1970 which I could not fix with certainty - if anyone can tell me how to fix them, I will.

HTML Code:
             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 2bbl, D88 2bbl
1965 387484   52   278/282   .430/.432  400, 330 4bbl ST,425 except Starfire
     388992   47   278/282   .430/.432  J88 4bbl, 330 4BC AT
     558528   36   250/264   .387/.388  330 2bbl
     388828   50   286/280   .427/.461  425 Starfire
1966 588528   36   250/264   .387/.388  330 2bbl
     388992   47   278/282   .430/.432  330 4bbl AT
     387484   52   278/282   .430/.432  425 except Starfire
     388828   50   286/280   .427/.461  425 Starfire
     393964   52   278/282   .430/.432  400 AT except OAI
     393859   58   286/286   .472/.472  400 ST except 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 2bbl lo-comp
     396192   47   278/282   .430/.432  330 4bbl AT,400 4BC AT x OAI
     397744   36   250/264   .435/.435  400 2bbl
     393964   52   278/282   .430/.432  330 4bbl ST, 425 except S/F, Toro
     396190   50   286/280   .472/.461  425 Starfire, Police
     396961   55   281/282   .472/.472  Toro
     393859   58   286/286   .472/.472  400 ST except 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 except OAI
     402486   48   262/274   .440/.440  400 AT except OAI, 350 w/ 269 Pol.
     400117   44   258/272   .435/.435  455 Irrig, Mar, hi-comp except Police, Toro, hi-perf.
     400084   36   250/264   .400/.400  350 except OAI
     402194   82   308/308   .474/.474  350 W-31, Hurst except A/C Casting #389410
     400165   57   285/287   .472/.472  455 Police, Toro W-34, Hurst A/C
     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 Police, Toro W-34, F-85, Hurst, 455 Marine 4bbl hi-perf
     402486   48   262/274   .440/.440  3269 AT, 350 Police
     402194   82   308/308   .474/.474  350 W-31 OAI
     400117   44   258/272   .435/.435  455 except Police, Toro, hi-perf.
     402569  108   328/328   .475/.475  400 OAI except W-32
     400084   36   250/264   .400/.400  350 except OAI
1970 393859   58   286/286   .472/.472  350 4bbl except AT, OAI, hi-perf
     400084   36   250/264   .400/.400  350 2bbl, 4bbl AT
     400117   44   258/272   .435/.435  455 except Police, Toro
     400165   57   285/287   .472/.472  4257, 67, 4400 AT, Toro W-34
     402486    8   262/274   .440/.440  455 Toro except W-34
     402569  108   328/328   .475/.475  455 4400 ST OAI (W-30)
     406768   68   294/296   .472/.472  455 4400 ST except OAI
     402194   82   308/308   .474/.474  350 W-31 OAI
1971 400084   36   250/264   .400/.400  350 2bbl, 4bbl AT
     400117   44   258/272   .435/.435  455 Toro w 2.73 axle, 455 except 400 or Performance Engine
     400165   57   285/287   .472/.472  455 4400 OAI w A/C, 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 except A/C
     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 4bbl AT, Marine Low Comp.
     402486   48   262/274   .440/.440  350 F-85 4bbl ST (L34), Marine
     409691   61   286/287   .474/.472  455 L75 ST,L77 AT, Marine Hi Comp.
     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 Low Comp.
     402486   48   262/274   .440/.440  350 ST M15, M20
     409691   61   286/287   .474/.472  455 4bbl, 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 Low Comp. (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 (Regular)
     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., except 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 1979
     562302   61   286/287   .472/.472  350, 403 Reguar Perf Marine, ST thru 79
- Eric
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Old May 11th, 2012, 08:21 AM   #10 (permalink)
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Cool

MD thanks a lot it looks good
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Old May 11th, 2012, 09:01 AM   #11 (permalink)
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The factory cam specs were all over the place. The 328 cam duration ranged from .241 to .246 at .050 and a measured duration at .006 was 316. The lift also ranged from 470 to 477.

I have had original nos cams measured on the cam doctor, which, gives you all of the specs. I have the specs for the 308 cam, 328 cam, 70 442 4 speed cam and the 71 and 72 4 speed w30 cam. If I remember correctly, the difference between the 70 4 speed cam and the 71 w-30 cam was one of them was 1 degree retarded. I would have to find my notes.
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Old May 11th, 2012, 05:58 PM   #12 (permalink)
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Quote:
Originally Posted by joesw31 View Post
I have the specs for the 308 cam, 328 cam, 70 442 4 speed cam and the 71 and 72 4 speed w30 cam.
So... Post 'em up, and help Joe out.

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Old May 13th, 2012, 08:26 AM   #13 (permalink)
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That would be nice. I was interested what equivalent camshaft equals the Olds non W30 cam.
thanks
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Old May 13th, 2012, 04:32 PM   #14 (permalink)
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I think Joe paid to have that cam read on the cam doctor...I don't know if that information is going to be had for nothing. On the other hand, doesn't the Mondello technical manual have cam specs for those years? I don't have mine handy at the moment or I'd know for sure.
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Old May 13th, 2012, 05:26 PM   #15 (permalink)
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The cam specs given are advertised. I wonder what the actual cams measure at 0.050. I know the 328 and 308 cams are 248 and 232 intake/exhaust degrees respectively. I wonder what the less famous cams duration was?
Thanks
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Old May 13th, 2012, 05:26 PM
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