W30 cam v 442 cam
#1
W30 cam v 442 cam
This may seem like a really dumb question but here goes. My 70 W30 4 spd (confirmed with broadcast cards) had it's original cam replaced with a standard 70 442 cam. I'm having her completely restored. So she will be getting the correct cam. Here's my question. She ran VERY strong with the wrong cam. What, if anything, will change with the correct cam? I was told once that the W30 cam only really worked with steep gears. I have 433s. Thoughts....
#2
I had the opposite problem. I put a 4 speed W30 cam in my 1970 W30 automatic and my car ran over a full second slower in the quarter mile. My elapsed time went from 13.28 ET @ 106.28 MPH with the automatic cam compared to 14.40ET @ barely 100MPH with the W30 4 Speed cam.
This was in the strictly stock class, street tires, and factory exhaust.
My conclusion is that my 1970 W30 automatic wouldn't run with the W30 4 Speed cam which was too radical for the 1970 W30 automatic.
FYI: The 1970 W30 automatic cam is identical to the 1970 455/365 442 cam.
I hope this helped.
This was in the strictly stock class, street tires, and factory exhaust.
My conclusion is that my 1970 W30 automatic wouldn't run with the W30 4 Speed cam which was too radical for the 1970 W30 automatic.
FYI: The 1970 W30 automatic cam is identical to the 1970 455/365 442 cam.
I hope this helped.
#4
I had the opposite problem. I put a 4 speed W30 cam in my 1970 W30 automatic and my car ran over a full second slower in the quarter mile. My elapsed time went from 13.28 ET @ 106.28 MPH with the automatic cam compared to 14.40ET @ barely 100MPH with the W30 4 Speed cam.
This was in the strictly stock class, street tires, and factory exhaust.
My conclusion is that my 1970 W30 automatic wouldn't run with the W30 4 Speed cam which was too radical for the 1970 W30 automatic.
FYI: The 1970 W30 automatic cam is identical to the 1970 455/365 442 cam.
I hope this helped.
This was in the strictly stock class, street tires, and factory exhaust.
My conclusion is that my 1970 W30 automatic wouldn't run with the W30 4 Speed cam which was too radical for the 1970 W30 automatic.
FYI: The 1970 W30 automatic cam is identical to the 1970 455/365 442 cam.
I hope this helped.
#7
It will run fine with the 4.33s. Give it plenty of initial timing. The 328 cam is too much cam for exhaust manifolds, Olds was planning for racers to swap to headers. One of the Pure Stock drags guys switched from a 308 cam in a 455 back to the original 442 cam (285/287 or whatever it is) and the car gained more midrange power, but hasn't been noticeably faster in either configuration. The downside of the 328 is not only the increased duration, Olds narrowed the lobe separation, which increases the overlap. Overlap and exhaust manifolds don't really mix well for performance.
#9
I had the opposite problem. I put a 4 speed W30 cam in my 1970 W30 automatic and my car ran over a full second slower in the quarter mile. My elapsed time went from 13.28 ET @ 106.28 MPH with the automatic cam compared to 14.40ET @ barely 100MPH with the W30 4 Speed cam.
This was in the strictly stock class, street tires, and factory exhaust.
My conclusion is that my 1970 W30 automatic wouldn't run with the W30 4 Speed cam which was too radical for the 1970 W30 automatic.
FYI: The 1970 W30 automatic cam is identical to the 1970 455/365 442 cam.
I hope this helped.
This was in the strictly stock class, street tires, and factory exhaust.
My conclusion is that my 1970 W30 automatic wouldn't run with the W30 4 Speed cam which was too radical for the 1970 W30 automatic.
FYI: The 1970 W30 automatic cam is identical to the 1970 455/365 442 cam.
I hope this helped.
#10
Stock '70 W30 automatic with factory transmission .only change was the 4 speed cam which killed my cars performance.
I swapped back the automatic cam and ran low 13's @ 105-106MPH all day. Yes, only change was the cam.
I swapped back the automatic cam and ran low 13's @ 105-106MPH all day. Yes, only change was the cam.
#12
This may seem like a really dumb question but here goes. My 70 W30 4 spd (confirmed with broadcast cards) had it's original cam replaced with a standard 70 442 cam. I'm having her completely restored. So she will be getting the correct cam. Here's my question. She ran VERY strong with the wrong cam. What, if anything, will change with the correct cam? I was told once that the W30 cam only really worked with steep gears. I have 433s. Thoughts....
#14
I appreciate the information. But I am restoring it to original factory condition. All this insight is very interesting though. Thanks
Last edited by 344870M; January 11th, 2019 at 10:27 AM.
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