Technical New camshaft

I have a 40 Chevy coupe with a 331 small block Chevy. Aluminum heads, Elderbrock intake with a Quickfuel 600 cfm, vacuum secondary. It has a 700R4 with Corvette performance parts,
9 inch Ford rear with 411 gears.
Question; want a cam with a good lope for that sound and more horsepower. What would be a good fit and I drive this car on the street. It also has AC. It has a mid range rv camshaft in it right now and can't handle the carb. Don't want to buy another carb.
Thanks in advance.

 

Call your cam company , they will know better than we would !!!

 

Isky Z-25 or Z-27

 

I'm jealous...here is my '40 from my teen years in Phoenix.in 1965, good times....I had a 301" in
it with a Sig Erson 990B...310 duration, 520 lift...needed to idle at 1800 to keep running.
Wicked sound though. I like 106 loc, with 490 lift and 300 duration cams. Good advice above
to call the cam company. The lower number of loc, the more lopey it will be, but somewhat
less streetable...but so what?

 

The Corvette "151" cam was a good one, likes 11:1 compression though.

 

Something roller.

 

I'm old school 097 Duntov great sound 228 and 230 at .50 108 centers .400 lift and anymore good solid lifters are easier to find and they held lash setting well. and a power band well toward 7000 rpm

 

L-79 or Summit Racing Camshaft №.1785
I have used both with an automatic transmission. The Summit cam's specs are close to the L-79.

 

Something's not right here. "Can't handle the carb"? It's a vacuum secondary, it will only run on the primaries when you open the throttle until there is enough vacuum to open the secondary. Changing the cam to one with more overlap is not going to improve this condition. I suggest you get it running right first before changing the cam.

 

I think the OP means he has enough carb but needs more cam to get more power and some "sound"; he has enough other good parts. I too would recommend a roller for less worries at break in, need current day cam suggestions or start calling Cam manufacturers as having an auto trans have to worry about converter some.

 

There ya' go with those pesky details !LOL

 

Pick up the phone and call Bullet Cams if you want to do this the right way.
Call Bullet Racing Cams at (662)893-5670.

 

You need to tune the carb properly. There is no reason it should not be able to handle a 600 cfm carb. I get 19 mpg on a 10.3 to 1 283 Chevy with a 600 cfm carb. Tune the carb. You might be surprised at how it sounds after it’s dialed in.

 

When I was putting together my '39 Chev with SBC 350 engine, 700R4 trans, and 3.73 rear 8.8" Ford axle; I contacted numerous cam companies for help. All but one sent me to their online form to fill out. Howard's Cams tech spent time on the phone with me, and directed me to the camshaft I bought.
My engine is fairly stock 1990 flat top pistons, with Dart 180 heads, Edelbrock Performer RPM intake, and a Quick Fuel 650 double pumper. The camshaft is a roller cam with .525"/.530" lift, duration 278/286, and LSA of 109. It's a somewhat rowdy idle, but works great with my automatic and the 2500 stall converter. Pulls extremely hard off idle, and runs up to around 6200 rpm's strong. I had new roller lifters, so just needed a camshaft. Any lift over around .490" will require enough valve spring to handle high lift, but all the aluminum heads seem to come with springs to handle this lift.
I'd call Howards Cams and talk with them and see what they recommend for your build.

 

had the same good personal service with howards

 

Just get the catalog, turn to SBC page, and go to bottom of the page. That will give you a radical idle.

Or realistically a cam with 220-230 duration at .050 lift is probably what will work good. Roller if you can afford it is better. That duration should still have enough for 700R4 to work on highway, but also nice strong idle sound without being too much for the street.

 

I stopped reading when you said you wanted a lopey idle and you have an automatic.

 

Yep! I also believe in fine tuning the carb... Try switching to the next lightest vacuum secondary spring and give that a try....

 

Haters will be haters........

 

Fix what you have. A mid RV cam is normally a 260-268 and should be fine with an automatic. But I’m thinking there are other problems in the total build that were not thought out.
With 4.11 gears you should be kicking *** with a 600 carb. I’m guessing the aluminum heads have 2.02-1.60 valves and 64 cc chamber, and your pistons are flat top. That’s not a lot of compression on a 327. If your chambers are 58cc then your good and in might be the cam position. 6*s advancing the cam will wake the engine up a lot if it’s set straight up or possibly retarded.
I’d be checking everything you have first. Good luck.