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Cam selection sbc 383 vortec heads

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Cam selection sbc 383 vortec heads

Postby c4mo » Thu May 31, 2012 9:00 pm

Looking For a solid flat tappet cam for 383 sbc
4.030x3.75
5.7 rod
Appoximately 11.1 compression haven't checked yet
Zero deck
Vortec heads, beehive springs plan on using PAC 1218, have not purchased yet
No rockers as of yet, 1.6 or 1.5 or a combination
Edelbrock victor for vortecs
750 dp Holley
1 3/4 headers open exhaust.
Msd 7al 2
3156 w/ driver
5.38 gear
Powerglide with transbrake
5200 stall.
This a bracket only car.
Rpm don't mind turning it 7400-7500, although I'm not sure if heads will support it. Thanks
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Re: Cam selection sbc 383 vortec heads

Postby F-BIRD'88 » Thu May 31, 2012 9:49 pm

One of the Crane Saturday Night Special solid lifter cams will get it done

F-256/3634-2S-5 If the cr is 11:1 or less

You can go a little bigger with more generous
compression ratio
F-260/3694-2S-6

Call Crane Cams if you want something different than you see in the catalog
or need a cam on a smaller base circle for chevy rod clearance.

Either are fine with a 1.5 rocker. Crane can advise on the best PAC valve spring.
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Re: Cam selection sbc 383 vortec heads

Postby ap72 » Thu May 31, 2012 10:44 pm

Those heads are WAY undersized. You need about 35cc more in your intake runner.

Did you mean the large port bowtie vortecs? They would be about perfect with a little porting.
LOL, according to the post count I'm an "expert." The only thing I'm an expert at is asking questions.
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Re: Cam selection sbc 383 vortec heads

Postby jason snyder » Thu May 31, 2012 11:16 pm

If they are 062 or 906 castings , and at least bowl ported ...i would go 248 -262 @ .050 and .540ish lift with a 108 lsa .
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Re: Cam selection sbc 383 vortec heads

Postby 1997bird » Fri Jun 01, 2012 12:24 am

F-BIRD'88 wrote:One of the Crane Saturday Night Special solid lifter cams will get it done

F-256/3634-2S-5 If the cr is 11:1 or less

You can go a little bigger with more generous
compression ratio
F-260/3694-2S-6

Call Crane Cams if you want something different than you see in the catalog
or need a cam on a smaller base circle for chevy rod clearance.

Either are fine with a 1.5 rocker. Crane can advise on the best PAC valve spring.


That is the cam a friend used (trmnatr) and it ran well. I have used some of those lobes due to him liking them so much. They made excellent power for me too.
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Re: Cam selection sbc 383 vortec heads

Postby CamKing » Fri Jun 01, 2012 9:13 am

With that stall, I'd recommend my part# M79362A-80362-108
260/263@.050"
.362"/.362" Lobe Lift
108 LSA

I'd also go with a 1.65 or 1.7 rocker on the intake, and a 1.6 rocker on the exhaust.
This would work great with the PAC 1218 spring.
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jonescams@bellsouth.net
http://www.jonescams.com
(704)489-2449
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Re: Cam selection sbc 383 vortec heads

Postby MidgetMotorsports07 » Fri Jun 01, 2012 10:00 am

Comp 12-705-8. Its not to big, but not to small. Your heads aren't quite big enough for your combo.

I wound run 1.6 rockers on both and call it a day. The PAC springs are a very good choice.
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Re: Cam selection sbc 383 vortec heads

Postby F-BIRD'88 » Mon Jun 04, 2012 4:46 pm

MidgetMotorsports07 wrote:Comp 12-705-8. Its not to big, but not to small. Your heads aren't quite big enough for your combo.

I wound run 1.6 rockers on both and call it a day. The PAC springs are a very good choice.


That part number refers to a roller cam. Might be a little rough on the flat tappet lifters.
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Re: Cam selection sbc 383 vortec heads

Postby c4mo » Tue Jun 05, 2012 4:18 pm

Thank you for the replies guys. I will look over them and see what i decide.
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