1977 C3 HELP WITH CAM 383 Stroker
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1st Gear
Joined: Jul 2015
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1977 C3 HELP WITH CAM 383 Stroker
Hey everyone how are all of ya. I am building my first c3 corvette I need some help with cam selection for a 383 I would like 450 HP looking for sugestions on cams that will help me get their without taking all my vacuum away for the headlights and brakes this is for the street not track also looking at AFR Heads or the 202 Dart heads 750 double pumper carb msd ignition with 6 al box still looking at intakes any help their would be great single or dual plan trying to keep the stock hood but seems impossible Thanks For any help would be great.
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
Hey everyone how are all of ya. I am building my first c3 corvette I need some help with cam selection for a 383 I would like 450 HP looking for sugestions on cams that will help me get their without taking all my vacuum away for the headlights and brakes this is for the street not track also looking at AFR Heads or the 202 Dart heads 750 double pumper carb msd ignition with 6 al box still looking at intakes any help their would be great single or dual plan trying to keep the stock hood but seems impossible Thanks For any help would be great.
First of all "double pumper" carburetors are made specifically for drag and track racing where an engine speed of 4000+ rpm can be maintained. For street use ONLY use vacuum secondary or AVS carburetors to prevent low speed bogging.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
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From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
For an intake, I'm running a Team G p/n 7530. Carb height is about the same as stock intake. I have a 1-3/4" drop base and a 4" x 14" filter under my stock hood. I also have a Holley Street HP 650 DP. I would suggest a 750 for a 383. I would also recommend a hydraulic roller cam. My car is street use only but I like a bit more power than stock. Unless you have a lead foot, there is nothing wrong with using a mech'l secondary carb with dual accelerator pumps on the street.
Last edited by resdoggie; Jul 9, 2015 at 09:04 AM.
Le Mans Master
Joined: May 2002
Posts: 5,086
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From: Lebanon Township New Jersey
The key to hood clearance is a drop base air cleaner. On my 77, with the stock hood, I have Edel. RPM air gap maifold and a 3/4 inch adapter under the carb. The air cleaner is 1.5 inch drop base with 3 inch element. Its tight, but it fits.
Melting Slicks
Joined: Mar 2006
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From: Piedmont Va
St. Jude Donor '11-'12-'13,'19-'20
Pro
Joined: Oct 2009
Posts: 664
Likes: 89
From: Marysville Ohio
And like others, I completely agree a DP, properly set up, will work just fine.
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Racer
Joined: Feb 2012
Posts: 421
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From: Harrisburg PA
I'm running a Comp Cams Hydarualic roller--XR282HR--in my 406 in my camaro...10.03:1 static. Sounds nice, idles well at 800 rom, and holds decent vacuum (11", if I remember correctly)...
750 Holley DP here...tuned properly a DP is perfectly fine for the street...
750 Holley DP here...tuned properly a DP is perfectly fine for the street...
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
No factory engine has ever come with a mechanical secondary double pumper carburetor for the reason I stated. And that includes the powerful L-88 and 426" Hemi.