Cam Question

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Cam Question

Postby Jitterbugdude » Thu Mar 23, 2017 6:45 am

So today's question is... What is the difference between a 1 barrel cam and a 2 barrel cam? If I have a cam can I tell which one it is? if so, how? Thanks for any info!
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Re: Cam Question

Postby cjbiagi » Thu Mar 23, 2017 9:22 am

Never really heard of camshafts referred to that way. My guess is the 2 bbl cam probably has a little more performance than the 1 bbl. Probably a little more duration and lift. Don't know how to identify it unless there is a part number on it
Clyde.........75 Monza 2+2
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Re: Cam Question

Postby Jitterbugdude » Thu Mar 23, 2017 11:26 am

Clears it up somewhat. I have often seen 1 bbl cams and 2 bbl cams sold for Vegas.There's a guy on ebay with some for sale. Never could figure out what the difference was. My Master Parts Catalogue only calls out one.
Thanks
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Re: Cam Question

Postby kgroombr » Thu Mar 23, 2017 11:28 am

There are two different part numbers for 1BBL and 2BBL cams in the parts manual, but it would be nice to know the exact difference between the two.

Ken
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Re: Cam Question

Postby Jitterbugdude » Thu Mar 23, 2017 1:48 pm

It would be nice to know for sure. I have 2 new cams and 4 more (still in their heads) but I don't know if any of them are 1 or 2 bbl. One of the boxed cams has a part number on it and "American Cam" on the box. I could call them and see if they have any info.
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Re: Cam Question

Postby Jitterbugdude » Thu Jan 21, 2021 1:50 pm

Nothing like resurrecting an old there... but here I go. I found the specs for 1bbl vs 2bbl camshafts for Vega 4 cylinder engine.

Cam Lift Valve Lift Adv. Dur. Effective timing event) Dur. Opens Closes Overlap Lash-hot lobe line
1 barrel .420 (int) .420 260 deg 208 4 deg ATC 32 deg ABC .015 108 deg
.430 (ex) .430 320 214 39 deg BBC 5 deg BBC .016 112 deg


2 barrel .437 (int) .437 278 deg 236 0 deg BTC 36 deg ABC .015 108 deg
.438 (ex) .438 326 deg 218 37 deg BBC 1 deg ATC .016 108 deg
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Re: Cam Question

Postby Jitterbugdude » Thu Jan 21, 2021 1:51 pm

Well hell.. that didn't go too well. I checked my post before sending and it showed a nice pretty chart. If anyone is interested I could try scanning the chart I have but its really hard to read.
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