what cam should I go with

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03-17-2005, 02:41 PM
1969chevytruck

what cam should I go with

Hi I have a 350 sbc and I am going to rebuild it. I am going to have it .030 over . The heads I am going with is the Vortec 64 cc with Intake Runner Volume 170 cc intake valve 1.940 in and exhaust 1.500 in. Edelbrock Performer RPM Vortec Intake Manifolds. 750 holly carb.
I am going to run 9.1 compression. I am looking for a cam that would make 350 hp with this setup but still keep ok gas mileage. With the old stock 350 I get like 12 miles a gallon I would like to stay around that not go much lower. I want the cam operating RPM range to go from 1,500-5,500 RPM. If anyone has any ideas what cam Duration and lift i should go with. please give me ideas
I still need a good amount of vacuum for my brakes. Also it will be a everyday driver.
03-17-2005, 03:47 PM
riverhorse59

Re: what cam should I go with

Quote:

Originally posted by 1969chevytruck
Hi I have a 350 sbc and I am going to rebuild it. I am going to have it .030 over . The heads I am going with is the Vortec 64 cc with Intake Runner Volume 170 cc intake valve 1.940 in and exhaust 1.500 in. Edelbrock Performer RPM Vortec Intake Manifolds. 750 holly carb.
I am going to run 9.1 compression. I am looking for a cam that would make 350 hp with this setup but still keep ok gas mileage. With the old stock 350 I get like 12 miles a gallon I would like to stay around that not go much lower. I want the cam operating RPM range to go from 1,500-5,500 RPM. If anyone has any ideas what cam Duration and lift i should go with. please give me ideas
I still need a good amount of vacuum for my brakes. Also it will be a everyday driver.

:) :)
Someone is going to come on behind me and recomend a much larger cam. But something close to a 268 comp. cam would do great with that combiination. Most every article I have ever read on camshafts says people try to use too big a cam for the application. Many cam companies have something close to the 268 comp. A little bigger or smaller wont hurt much. Also , You are a little strong on the carburator. Id back up tp a 600 or no more than a 650 holley.
Sounds like You have a nice project there, Good Luck!:LOL: :LOL:
03-17-2005, 04:39 PM
dr_bowtie

the Vortec heads are limited to .480lift and 230 duration at .050 in out of the box form....

personally I would not go bigger than 225.....I run a lot of the vette cams .447 x .222

for your ap I would recomend a "dual pattern" cam from either Crane or Comp cams....

Those heads have very efficient combustion chambers....what that means to you is less cam to make 350hp and possible 18-20mpg with good tuning and conservative timing 32-34 degrees total nice choice
03-17-2005, 05:39 PM
1969chevytruck

spring

ON the heads I was told to upgrade the valve springs. would that be a good idea. So when you say dual pattern, do you mean a cam like Duration intake 224 and exhaust 230 and intake lift .479 ehaust lift .480
like this cam
03-17-2005, 06:00 PM
dr_bowtie

yes....both Crane and Comp cams make cams specifically for the Vortec headed application....they will be able to reccomend a cam for you....
03-17-2005, 06:44 PM
riverhorse59

dr_bowtie ,I guess we should have ask him about his transmission and his rear end ratio. The Vortec is a very good head for the money. I was just looking at summit's cam#sum1103 214/224----442/465---$79.95 cam,lifters,lube . I have used comp for years but Im sure they all have good cams.
$79.95 is not a bad price.
03-17-2005, 07:28 PM
1969chevytruck

i have a turbo 350 and i think my gearing is 411s becaus when i run 65 i am around 3100 rpm with 30 inch tires
03-19-2005, 12:39 PM
1969chevytruck

headers

I am looking at the headman headers model HED-69090 will these Headers work with the vortec heads. because I am looking for a set and trying not to spend much more that 150 on a set of headers.