Super Chevy – October 2019

82 SUPER CHEVY OCTOBER^2019

TECH A GREATER CRATE

Yeah, what a difference a cam makes. Tested with the GM single-

plane high-rise intake, the SP with the new cam made more

power everywhere, and lots of it over most of the pull. Not only

did the peak hp number shoot up to  hp (a gain of  peak hp)

but the peak number moved out to , rpm and the engine

easily pulled to , rpm. Torque was up as well with a peak

gain of  lb-ft. With the new cam, the SP is able to take better

advantage of the GM intake that ships with the engine.

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Out of curiosity we decided to toss on a dual-plane intake to

gauge the effect. This time around it was a Weiand Street Warrior.

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With the same setup as before—Holley  XP carb, billet MSD

distributor, and .-inch long-tube headers—we were ready

to spin up the SP for its grand finale.

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As expected, the power

numbers early in the pull

favored the dual-plane. But

because of the new camshaft

it wasn’t as dramatic as it was

with the stock GM cam. Below

,, the dual-plane was the

way to go, but from , rpm

on up the single-plane made

more power and torque.

We call this nearly a tie, and

which intake is best really

depends on how you plan to

drive your Chevy. With just

some basic mods we were

able to wring out a bit more

power and make a great crate

engine even better.

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Chevrolet Performance

chevrolet.com/performance

Edelbrock

888.799.1135

edelbrock.com

Holley / Hooker / Weiand

270.781.9741

holley.com

Howards Cams

920.233.5228

howardscams.com

MSD Ignition

915.857.5200

msdignition.com

Westech Performance Group

951.685.4767

westechperformance.com

SOURCES:

This stroker gives you what you need for the

street, and that’s torque. Rated at 435 hp and

445 lb-ft of torque, it gives a lot of performance

right out of the box. But, there’s nothing wrong

with aspiring for “just a little bit more.”