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Ask Anything - March 2014

While your idea for a short-duration camshaft to build torque might sound like a good idea, something closer to 210 to 215 degrees of duration at 0.050 for a 350ci engine is probably a better idea. This will allow the engine time to better fill the cylinders while still making decent top-end power. A good cylinder head will really help produce power at all engine speeds. My good friend, the late John Lingenfelter, said it best, “An engine with the best cam in the world but poor heads will be a slug. But a great set of heads will make good power even with a lame camshaft.” Truer words were never spoken. A good choice for a budget small-block Chevy would be the iron 1.94/1.50 valve size Vortec truck heads, since they flow well and are inexpensive. Or take a look at our small-block cylinder head comparison (“Eight Budget SBC Cylinder Head Shootout,” Sept. '09). The choice of camshaft should be based on the size of the engine. A larger small-block like a 383 or 406 could use a slightly longer-duration camshaft than a 283.

A 355ci small-block Chevy with a set of Vortec iron heads would be very torquey with a camshaft with around 210 degrees of duration at 0.050. You might be able to get away with increasing the lift with a set of 1.6:1 rocker arms, since all short-duration cams are valve lift–limited. This discussion is basically around a flat-tappet hydraulic camshaft. A hydraulic roller will produce more lift, but there are limitations to these short-duration cams that actually make the flat-tappet cam a wiser choice. If you want to know why, write an email to Ask Anything, and we'll take on that subject at a later date. This short-duration torque cam would work well with a 9.0 to 9.5:1 compression ratio, especially if the piston-to-head clearance is held as tight as possible. This improves quench and reduces the engine's sensitivity to detonation. A good exhaust system will help even a short cam, and long-tube headers will enhance low-speed torque as will a longer collector. Of course, a good dual-plane intake (we did that test, too, “Dual-Plane Intake Comparison,” Sept., '13) is the only choice for an intake manifold and a Quadrajet or a 600-cfm Holley carburetor will also help. Throttle response should be very crisp, with 400 lb-ft of torque, and this is more than enough power to make for an excellent street small-block that will be loads of fun to drive.


CC Quickies

Here's a behind-the-scenes shot from one of the photo shoots we did during the Street Machine Nationals.

On a recent trip to our local junkyard, we were looking for old Chevy pickup steering wheels, and some random pulleys and brackets. We left empty-handed this time, but that's how it goes sometimes. Did you score something in the junkyard recently? Send pictures to CarCraft@CarCraft.com.

Do you love nostalgia drag racing? We're working on the Spring 2014 issue of Elapsed Times, our newsstand only publication dedicated to retro drag racing.


Ask Anything— We've Got Solutions!

CarCraft@CarCraft.com
CarCraft.com

Car Craft Mag
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SOURCES
Hotchkis Performance
12035 Burke Street
Suite 13
Santa Fe Springs
CA  90670
877-735-6425
http://www.hotchkis.net
QA1
21730 Hanover Avenue
Lakeville
MN  55044
800-721-7761
http://www.qa1.net
Comp Cams
3406 Democrat Road
Memphis
TN  38118
800-999-0853
http://www.compcams.com
Bilstein Corporation of America
8845 Rehco Rd., Dept. KC
San Diego, CA 92121
www.bilstein.com
Global West Suspension
655 S. Lincoln Ave.
San Bernardino
CA  92408
877-470-2975
909-890-0759
http://www.globalwest.net
Koni America
8085 Production Ave.
Florence
KY  8085
RideTech
350 S. St. Charles Street
Jasper
IN  47546
812-481-4787
http://www.ridetech.com
JRI Shocks
704-660-8346
http://www.jrishocks.com
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1 comments
Richard Moore
Richard Moore

QUESTION:  I own a 2008 dodge charger v6. I want more horsepower!!!  are there any kits out the a.e. v6 mustangs  that will help?? I love my car but I need more power...thank you! Im a reader frm the 70's!

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