need help selecting a cam for my 383 - Team Camaro Tech
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post #1 of 23 (permalink) Old Jun 7th, 15, 11:09 PM Thread Starter
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Jerry R.
 
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need help selecting a cam for my 383

I bought a 383 short-block from Summit, then picked up a pair of used World heads (iron) with big valves, they were recently redone and are in nice shape. I'm about to order a 750 cfm Quick fuel carb with mechanical secondaries.

Specs on the rest.

Turbo 400 trans just rebuilt
3.36 posi rear
255/60/15 tires
10-1 compression
headers
power brakes
pump gas
dual plane aluminum manifold
dont have a torque converter yet but probably 2200 rpm or somewhere close
looking for nice cruiser with some snort off the line but want to be able to pass multiple cars easily on the hi way

thanks in advance

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post #2 of 23 (permalink) Old Jun 8th, 15, 03:37 AM
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Re: need help selecting a cam for my 383

I like this...roller cam BTW

http://www.compcams.com/Company/CC/c...?csid=181&sb=2

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post #3 of 23 (permalink) Old Jun 8th, 15, 04:16 AM
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Re: need help selecting a cam for my 383

Nice choice of camshaft.

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post #4 of 23 (permalink) Old Jun 8th, 15, 03:14 PM
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Re: need help selecting a cam for my 383

I had a double pumper with an automatic once and wan't happy with it at all. I have an AED in my car now but I'm also running a Tremec 5 speed now. If I was running a Double Pumper I'd want gears and stall at least! You gotta get that beast to rev quick!

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post #5 of 23 (permalink) Old Jun 8th, 15, 04:44 PM
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Re: need help selecting a cam for my 383

I went with an XR282HR form comp cams in my 406....Makes decent vacuum and a ton of torque and power...

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post #6 of 23 (permalink) Old Jun 8th, 15, 06:40 PM
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Re: need help selecting a cam for my 383

You cant go to high of lift cam you will lose vacuum to brakes and that sucks plus you will have to run a big stall which kills the mileage. I have made those mistakes so go smaller like 485 lift and you will be much happier
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post #7 of 23 (permalink) Old Jun 8th, 15, 09:21 PM Thread Starter
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Re: need help selecting a cam for my 383

thanks for the replies guys.
I read up on both of the comp cams you suggested.
Do you think I am going to have a problem compensating for those 336 gears?

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post #8 of 23 (permalink) Old Jun 9th, 15, 12:35 PM
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Re: need help selecting a cam for my 383

I have power brakes and run a high lift cam w/o a vacuum resivoir. Lift on my cam is 525/540. I believe the overlap and duration affect the vacuum more

The reason you need the lower gears with the big cam is to compensate for the lack of low end response. With your current setup you will most likely be happier with a smaller cam and a vacuum secondary carb. That's my experience

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post #9 of 23 (permalink) Old Jun 9th, 15, 02:27 PM
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Re: need help selecting a cam for my 383

Quote:
Originally Posted by 68SSlemans View Post
I believe the overlap and duration affect the vacuum more
You are correct, overlap and duration effect vacuum, higher lift gets more charge in and out of the heads/cylinders to a point and moves the peak horsepower to a higher rpm.

69 Camaro Z/28 RS, original Azure Turquoise, M21 & 3.73 12-bolt posi. NOM 406ci, AFR 210 heads, Straub hyd. roller cam & Dynatech 1-3/4" > 1-7/8" headers, QuickFuel 750 Annular. Photos at:
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post #10 of 23 (permalink) Old Jun 11th, 15, 05:23 PM
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Re: need help selecting a cam for my 383

Fill this in and see what Mike Jones says, if you want a cam for your engine. Shelf cams are generic grinds, made to work but not necessarily the best for your engine/car.

http://jonescams.com/street-performance/
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post #11 of 23 (permalink) Old Jun 12th, 15, 10:25 AM
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Re: need help selecting a cam for my 383

Quote:
Originally Posted by jr68 View Post
I bought a 383 short-block from Summit, then picked up a pair of used World heads (iron) with big valves, they were recently redone and are in nice shape. I'm about to order a 750 cfm Quick fuel carb with mechanical secondaries.

Specs on the rest.

Turbo 400 trans just rebuilt
3.36 posi rear
255/60/15 tires
10-1 compression
headers
power brakes
pump gas
dual plane aluminum manifold
dont have a torque converter yet but probably 2200 rpm or somewhere close
looking for nice cruiser with some snort off the line but want to be able to pass multiple cars easily on the hi way

thanks in advance

Which world heads did you get?

Chris

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post #12 of 23 (permalink) Old Jun 12th, 15, 10:31 PM Thread Starter
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Re: need help selecting a cam for my 383

Quote:
Originally Posted by kimosabi View Post
Fill this in and see what Mike Jones says, if you want a cam for your engine. Shelf cams are generic grinds, made to work but not necessarily the best for your engine/car.

http://jonescams.com/street-performance/
I know right now that I cant come up with half of that info like intake or exhaust flow, and for those reasons I'm out

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post #13 of 23 (permalink) Old Jun 13th, 15, 03:36 PM
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Re: need help selecting a cam for my 383

A HR cam with 210-215* IN dur will give oodles of TQ for those gears and stockish TQ converter. 5* Less dur if more economy is wanted.

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post #14 of 23 (permalink) Old Jun 15th, 15, 09:19 PM Thread Starter
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Re: need help selecting a cam for my 383

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Originally Posted by cstraub View Post
Which world heads did you get?
the only writing on the head is this

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post #15 of 23 (permalink) Old Jun 17th, 15, 01:48 PM
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Re: need help selecting a cam for my 383

Take a picture of the combustion chamber and I can tell you for sure sir.

Chris

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