1970 W-30 automatic camshaft
July 2nd, 2017, 04:28 AM
#1
Registered User
Thread Starter
Join Date: Jun 2013
Location: North west Indiana -Florida
Posts: 459
1970 W-30 automatic camshaft
Anybody use a different camshaft with a rougher idle than the stock W-30 camshaft used in the 1970 W-30 auto with air ?? Looking for a possible upgrade with good vacumn and a nice rough idle. Thanks. Greg
July 2nd, 2017, 04:56 AM
#2
Registered User
Join Date: May 2008
Posts: 1,400
I would use a 1970 to 1972 442 4 speed camshaft. Its in between the auto W30 camshaft and the W31 camshaft. the specs are 294/296 duration .472 lift. I had several of these made.
Last edited by joesw31; July 2nd, 2017 at 05:02 AM.
July 2nd, 2017, 06:24 AM
#3
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 48,255
You do realize these two things are mutually exclusive, right? If all you care about is the "nice rough idle", get a Thumper cam. All the crappy idle of a real long overlap cam with none of the pesky extra horsepower...
July 2nd, 2017, 06:46 AM
#4
Registered User
Thread Starter
Join Date: Jun 2013
Location: North west Indiana -Florida
Posts: 459
was looking for a happy medium between good vacuum and performance along with a nice idle---------i have had only 4-speed w-30's in the past this is my first resto with the auto and air
July 2nd, 2017, 06:52 AM
#5
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 48,255
The 294/296 cam WAS offered with A/C, so it will work fine. If you've owned these cars, you already know what the idle quality with that cam will be.
July 2nd, 2017, 07:19 AM
#6
Registered User
Thread Starter
Join Date: Jun 2013
Location: North west Indiana -Florida
Posts: 459
Define "nice idle". Do you want a crappy rump-rump idle or not? Your statements are confusing. In any case, the lumpy idle will not work with A/C or power brakes. You'll need to install an aux vacuum pump. The AT may or may not work with manifold vacuum - you might need to adjust the modulator. Olds did offer automatics with the 328 deg cam in 1968-69 W-30s.
The 294/296 cam WAS offered with A/C, so it will work fine. If you've owned these cars, you already know what the idle quality with that cam will be.
The 294/296 cam WAS offered with A/C, so it will work fine. If you've owned these cars, you already know what the idle quality with that cam will be.
July 2nd, 2017, 08:53 AM
#7
Registered User
Join Date: May 2008
Posts: 1,400
not looking for a real bumpy idle, just maybe a in between stock w-30 auto and the w-30 4-speed. since the 294/296 cam was used in cars with a/c i wonder if its ok with the auto too?? probably good bet to just go with the stock auto w-30 cam sounds like, just never had any experience with this cam, how does it sound ?? thanks Greg
It has a slight lope, and yes it works with your auto trans. Look at this thread it was used I this W30 https://classicoldsmobile.com/forums...70-w-30-a.html.
Thread
Thread Starter
Forum
Replies
Last Post
