Performance Parts News

Crane Cams current dual valve spring, part Crane Cams 99893, is undoubtedly one of the most popular performance springs sold in the aftermarket today. However, higher performance requirements of ever-aggressive camshaft lobe designs have revealed some deficiencies in what Crane Cams calls “Ole Reliable.” To address these issues, the company has just released a new and improved variant, part Crane Cams 99892. This new design has much in common with Crane Cams 99893, but the slight differences make a significant improvement in performance and useful life! The Crane Cams 99892 is a dual spring without damper. It is also an excellent “total performance,” street performance or moderate racing spring for use with hydraulic roller camshafts or flat tappet cams (hydraulic and mechanical) with tall installed heights. Wire diameter and coil count changes to both the inner and outer springs greatly improve harmonic control throughout the operating range. Super-clean, high-tensile, chrome-silicon valve spring wire assures consistent loads through a long spring life.

Crane Cams 99892 New Dual Valve Spring

For more information, including other Crane Cam products, click here.

Nothing brings more attention to a car than the sound of its engine, especially at a car show or cruise-in. Comp Cams’ new Thumpr^TM Series of camshafts provides power you can feel and hear! In the past most cam designs that produced a noticeable thump in the idle sacrificed economy and drivability. These cams have been engineered with lobe profiles that maximize the rough-idling characteristics of the cam without negatively impacting the power output or streetability of the engine. These retro-fit hydraulic roller camshafts are designed for use in 1955-1998 262-400 cubic inch Small Block Chevrolet engines that were originally equipped with flat tappet camshafts.

Part numbers available are:

Comp Cams 12-600-8 - Designed for operating ranges of 1900 to 5600 RPM. Advertised duration is 283in./303ex. with valve lift of .511/.497. This cam is designed for high performance street engine builds. Works okay with a stock converter, but works best with a 2000+ stall converter and gears. Choppy idle

Comp Cams 12-601-8 - This cam is designed for high performance street builds that may see some time at the strip. Designed for operating ranges of 2200 to 5900 RPM. Advertised duration is 291in./311ex. with valve lift of .521/.507. Needs a massaged engine with 9:1 compression ratio minimum. We recommend a dual plane manifold, preferrably the Edelbrock Air Gap 2601, and headers. Drivetrain needs gears and a 2500+ stall converter. Rough idle!

Comp Cams 12-602-8 - This cam is designed for high performance hot street and drag strip engines. Designed for operating ranges of 2500 to 6200 RPM. Advertised duration is 299in./319ex. with valve lift of .531/.517. Needs a minimum compression ratio of 9.5:1. Manifold, headers,gears and a 2800+ stall converter are required. Very rough idle!

Race-Proven New Lobe Profiles For Street And Race Engines!

• Street and race lobe profiles available with up to .600+” valve lift!
• Special-order race lobe profiles available with .600+” valve lift!
• Computer lobe profiles designed for maximum horsepower, torque, RPM and response!
• Cam lobe profiles matched to total engine components package!
• All-new frequency-matched valve springs for all cam lobe profiles!
• Precision machined heat treated steel and ultra-lightweight titanium alloy valve spring retainers available!

For 1992-up engines with standard cylinder heads

Crane Cams 379501
Good idle, daily performance, blower, nitrous oxide

Crane Cams 379511
Fair idle, normally aspirated, street performance and bracket racing, computer upgrades required

For 1999-up engines with Power Improvement cylinder heads (Crane 37830-16 valve springs required)

Crane Cams 379601
Smooth idle, daily usage, high torque, towing

Crane Cams 379611
Good idle, daily performance, blower, nitrous oxide

Crane Cams 379621
Fair idle, normally aspirated, street performance and bracket racing w/2000+ converter, computer upgrades required

Crane Cams 379631
Rough idle, increased compression ratio required, street performance and bracket racing w/2500+ converter, computer upgrades required