Cam ?
Thread Starter
3rd Gear
Joined: Mar 2017
Posts: 3
Likes: 0
Cam ?
Hi new to the forum. Looking for a good performance cam for my motor. Have a 73 4 speed 350. Currently has bpe 2.02 heads performer intake 1.6 roller rockers and hei and Holley 650. Wouldn't mind changing to a better intake manifold as well has 3" cowl on stock hood if anyone knows the best package that would fit. Thanks
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Race Director
Joined: May 2006
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The OP stated 4 speed and here's a suggestion
https://www.summitracing.com/parts/c...make/chevrolet .
https://www.summitracing.com/parts/c...make/chevrolet .
Last edited by MelWff; Mar 9, 2017 at 03:04 PM.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Ooops.......I read it twice to be sure too 
Anyhoo........buy a Dart Dual Plane Air Gap style intake and try a 12-211-2......this is the old 270H Magnum.....yes it is an old grind but it will break in nice and sound killer. If you had more gear I would jump to a 280H.
There are more modern grinds available....the 274XE Comp is a nice grind but can be tricky to break in and does not sound as good......they will make about the same power with the newer grind being better down low.
Jebby
Anyhoo........buy a Dart Dual Plane Air Gap style intake and try a 12-211-2......this is the old 270H Magnum.....yes it is an old grind but it will break in nice and sound killer. If you had more gear I would jump to a 280H.
There are more modern grinds available....the 274XE Comp is a nice grind but can be tricky to break in and does not sound as good......they will make about the same power with the newer grind being better down low.
Jebby
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Race Director
Joined: May 2003
Posts: 10,956
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From: California
:agree:^ ^^My sons and I build a lot of high performance engines ... I am currently running a 650hp 427 gen1 SBC in my C3 1979
But if you do not have the skills, or $$$$ to do it right.. Go with the Edelbrock heads cam and intake package. it is a very good package for the novice. We did a full Edelbrock package on one of our C4's, Although we did increases the compression with smaller chamber and thinner gaskets, we only got to 10.25:1
This combination, netted 397hp at the rear wheels, through an automatic. and slightly more torque.. so, yes, a good combination for sure.
Racer
Joined: Dec 2008
Posts: 297
Likes: 19
From: arlington TX
Hi,
The Air-Gap is a good manifold!! Is this the stock motor (other than changes you've made)? L48 or L82? L48 cam was .450 lift and L82 was .480 if I remember correctly. 1.6 rockers are making a it pretty healthy lift already. Even a new design cam with the same specs as the L82 would be a noticeable improvement. But, I wouldn't do much more than that with the 9.0 comp ratio.
Truthfully, the best kick in the pants change would be a gear change! If just a weekend 'fun' car, 3.70 would be an awesome gear!
Good luck.
walt z.
The Air-Gap is a good manifold!! Is this the stock motor (other than changes you've made)? L48 or L82? L48 cam was .450 lift and L82 was .480 if I remember correctly. 1.6 rockers are making a it pretty healthy lift already. Even a new design cam with the same specs as the L82 would be a noticeable improvement. But, I wouldn't do much more than that with the 9.0 comp ratio.
Truthfully, the best kick in the pants change would be a gear change! If just a weekend 'fun' car, 3.70 would be an awesome gear!
Good luck.
walt z.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Hi new to the forum. Looking for a good performance cam for my motor. Have a 73 4 speed 350. Currently has bpe 2.02 heads performer intake 1.6 roller rockers and hei and Holley 650. Wouldn't mind changing to a better intake manifold as well has 3" cowl on stock hood if anyone knows the best package that would fit. Thanks
Thread Starter
3rd Gear
Joined: Mar 2017
Posts: 3
Likes: 0
Hi,
The Air-Gap is a good manifold!! Is this the stock motor (other than changes you've made)? L48 or L82? L48 cam was .450 lift and L82 was .480 if I remember correctly. 1.6 rockers are making a it pretty healthy lift already. Even a new design cam with the same specs as the L82 would be a noticeable improvement. But, I wouldn't do much more than that with the 9.0 comp ratio.
Truthfully, the best kick in the pants change would be a gear change! If just a weekend 'fun' car, 3.70 would be an awesome gear!
Good luck.
walt z.
The Air-Gap is a good manifold!! Is this the stock motor (other than changes you've made)? L48 or L82? L48 cam was .450 lift and L82 was .480 if I remember correctly. 1.6 rockers are making a it pretty healthy lift already. Even a new design cam with the same specs as the L82 would be a noticeable improvement. But, I wouldn't do much more than that with the 9.0 comp ratio.
Truthfully, the best kick in the pants change would be a gear change! If just a weekend 'fun' car, 3.70 would be an awesome gear!
Good luck.
walt z.
Racer
Joined: Dec 2008
Posts: 297
Likes: 19
From: arlington TX
Just re-read your original post and see you have a Performer' manifold. The Air-Gap is a Performer with an 'air-gap'. Supposed to make intake charge a little cooler. So, going to that would be a SMALL benefit.
Gear change would be the next big step. Tuning (jet changes, timing curve changes) to make the most of what you have now also needed.
Good luck.
walt z.
Gear change would be the next big step. Tuning (jet changes, timing curve changes) to make the most of what you have now also needed.
Good luck.
walt z.
Melting Slicks
Joined: Dec 2009
Posts: 3,233
Likes: 657
From: Thunder Bay
If you have an L82 you already have a pretty good cam. Good enough, at least, that its probably not worth spending the money on a cam change unless you are prepared to move up to a roller cam. That L82 cam is a GM#3896962 and has about 222 deg of duration at .050" and about .450 lift IIRC. Back in the day I we used to install this as a performance cam. Its a great street grind. Certainly you can do a little better with a newer cam grind, but I doubt it would be worth the time and money.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
the air gap has better runners than std performer
If its a stock stroke you may not notice it til upper midrange/upstairs though; if thats all you got run it can still run very well.
If its a stock stroke you may not notice it til upper midrange/upstairs though; if thats all you got run it can still run very well.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Ooops.......I read it twice to be sure too
Anyhoo........buy a Dart Dual Plane Air Gap style intake and try a 12-211-2......this is the old 270H Magnum.....yes it is an old grind but it will break in nice and sound killer. If you had more gear I would jump to a 280H.
There are more modern grinds available....the 274XE Comp is a nice grind but can be tricky to break in and does not sound as good......they will make about the same power with the newer grind being better down low.
Jebby
Anyhoo........buy a Dart Dual Plane Air Gap style intake and try a 12-211-2......this is the old 270H Magnum.....yes it is an old grind but it will break in nice and sound killer. If you had more gear I would jump to a 280H.
There are more modern grinds available....the 274XE Comp is a nice grind but can be tricky to break in and does not sound as good......they will make about the same power with the newer grind being better down low.
Jebby
