Lunati Camshaft Catalogue - Superformance |Car Parts ...

[Pages:340]OUR HISTORY

THE RACER'S COMPANY

Winning racers don't find victory lane by accident. It takes dedication, knowledge, drive and power to beat your competition. At Lunati, we have racing pumping through our veins. Our determination and dedication to supply enthusiasts with superior internal engine components is unmatched in the aftermarket industry. For over 40 years, we have proven this on race tracks and streets all over America. So when the time comes to upgrade your engine, you can count on Lunati's one-on-one customer service and premium parts to put the competition in your rearview mirror.

IT'S WHO WE ARE

At Lunati, we understand that as a racer or engine builder, you need valvetrain and bottom end components that can handle extreme race conditions and produce race winning power levels. We also know how important it is for our products to be backed by real people who provide personalized customer support. In 1969, Joe Lunati founded this company on a philosophy that continues to this day - to produce a diverse, race-proven product line that includes camshafts and related valvetrain products, pistons, connecting rods and crankshafts. We employ a knowledgeable, in-house tech support team that is ready to work directly with you, no matter how large or small your request.

Get IN TOUCh

Contact us by one of the means listed below with technical questions or to purchase parts. That's right ? unlike the big guys, we'll work with and sell directly to you. Customer Support Line: (662) 892-1500, Mon.-Fri., 7am-6pm CST Website: (Live Chat Available) Email: techsupport@ Facebook: TheRacersCompany Twitter: LunatiPower

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Table of Contents

TABLE OF CONTENTS

Valvetrain section

Camshafts Camshaft Tech resources

Steps To Selecting A Lunati Cam...................................10 Camshaft Part Number Explanation..............................12 Camshaft Tech Info..........................................................4 Kits And Components Listing........................................11 Camshaft Master Footnote Listing...................................2 Camshaft Upgrade Services........................................276

AMC ..................................................................................14 Buick................................................................................126 Cadillac............................................................................132 Chevrolet..........................................................................134 Chrysler..............................................................................18 Ford....................................................................................50 Harley Davidson...............................................................262 Holden.............................................................................268 Oldsmobile.......................................................................238 Pontiac.............................................................................248 Specialty Cams................................................................272

Lifters

Hydraulic..........................................................................278 Hydraulic Roller...............................................................282 Rev Kits............................................................................286 Solid.................................................................................281 Solid Roller.......................................................................284

Pushrods

Accessories.....................................................................317 Pushrods..........................................................................309

Rocker Arms

Aluminum Rocker Arms...................................................305 Guide Plates....................................................................308 Polylocks.........................................................................307 Rocker Studs...................................................................307 Steel Rocker Arms...........................................................304 Stud Girdles.....................................................................308

Timing Sets

Adjustable Cam Gear Set................................................323 Adjustable Timing Sets....................................................321 Cam Bolts........................................................................325 Cam Lock Plates..............................................................325 Cam Phaser Limiter Kits..................................................324 Degree Bushings.............................................................325 Distributor Gears..............................................................326 Double Roller Timing Sets...............................................320 Double Row Timing Sets.................................................319 Gear Drives......................................................................323 GM LS Timing Sets..........................................................322 Single Roller Timing Sets.................................................318 Race Timing Sets.............................................................320 Thrust Bearings/Wear Plates...........................................324 Thrust Buttons.................................................................325

Valve Springs

Valve Spring Tech Info.....................................................287 Cups................................................................................301 Lash Caps........................................................................302 Locators...........................................................................301 Locks...............................................................................302 Oil Seals...........................................................................303 Retainers..........................................................................298 Seat Spacers...................................................................301 Shims...............................................................................303 Valve Spring Kits..............................................................293 Valve Springs...................................................................289

Miscellaneous section

Apparel .......................................................................330 Driven Racing Oils.............................................332 Merchandise...........................................................331 TOOLS.............................................................................327 Warranty...................................................................336

looking for rotating assembly components?

If so, Lunati has you covered. This catalog is only a listing of Lunati VALVETRAIN components ? please call us at 662-892-1500 to order your complete rotating assembly or rotating components today.

Tech Support: 662-892-1500 :: 1

FOOTNOTE INDEX

Camshaft Master Footnote Listing

1. Requires machining on cylinder heads.

2. Adjustable valve train required.

3. Includes 4 groove valve locks. For single groove see valve lock or spring kit section.

4. Use lifter part #70998-16 for oiling through the pushrods.

5. Valve locks consist of 1/2 set 2 groove; 1/2 set 4 groove. For single groove see valve lock or spring kit section.

6. Pre-1968 use part #71812-16 hydraulic lifters.

7. Engines with self-aligning rocker arms must use part # 85340-16.

8. Requires upgraded gear, thrust button and wear plate.

9. 1992-1994 LT1/LT4, use part #92126; 1995 and up, use part #92128.

10. Requires thrust button and wear plate.

11. Includes Torrington roller thrust bearing.

12. Truck engines have .400" taller block.

13. Most aluminum heads come standard with 11/32" valve stems. Use appropriate valve locks, retainers, and seals.

14. Requires part #86005-16 stud kit except on factory aluminum heads.

15. Requires screw-in studs and guide plates. 16. 1962-69 use part #5024-16. 17. Timing set accomodates one-piece fuel pump eccentric. 18. Requires distributor gear upgrade. 19. For engines with multi-groove valves, see spring kit or valve

lock section. 20. Fits only certain years. 21. Part #80775-16 only works with non-adjustable factory

rocker arms, use part #5600-16 for adjustable rockers. 22. Works in 1964-88 models only. 23. Fits 260-403 engines only. See pushrod section for 400, 455

engines. 24. Camshaft retaining plate part #90212 recommended. 25. Fits 1964-88 models only. 1989 and up, use .312" diameter

valve stem and bead style locks. 26. Kit does not include timing set. 27. Kit includes springs, retainers, locks, seals and locators. 28. Timing set accomodates two-piece fuel pump eccentric.

NOTE

On all camshaft charts on pages 14-271, there is a column labeled "Pre-2011 Cam #." In 2011, Lunati transitioned to a SMART part numbering system, however, the pre-2011 cam numbers can still be referenced when using this catalog and ordering.

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Lunati incorporates over 40 years of experience into every camshaft design to create the most technologically advanced cams on the market today, with more throttle response, quicker acceleration and bigger horsepower numbers. From the Voodoo series of camshafts that deliver more area under the curve than any other series of camshafts, to the budgetfriendly BareBones series that will boost horsepower without breaking the bank, Lunati carries a camshaft to fit every racer's need.

CAMSHAFTS

lifters

VALVE SPRINGS

ROCKER ARMS

CAMSHAFT TECH INFO

Types of Camshafts & Lifters

Hydraulic Flat Tappet Hydraulic flat tappets are self-adjusting due to the valve controlled plunger within the tappet body. It operates to pre-load the pushrod by using oil system pressure to maintain this pre-load in the closed valve position. Hydraulic tappets are quieter than solid tappets since there is no lash or free-play. However, it is generally agreed that they fall short of offering optimum performance above 6000-6500 RPM. Many cheaper designs fall even shorter than this. This poor performance at high RPM is due mainly to the inability of the lifter to "bleed down" the excess oil pressure and doesn't allow the valves to seat.

Hydraulic Roller The hydraulic roller tappet camshaft can provide the best of both worlds. All Late Model engines have used this design since the mid to late 1980s. They provide most of the virtues of a solid/mechanical roller tappet while providing the benefits of quiet operation and ease of valve lash setting. This type of design still has the limitations of an oil bleed-off control type follower. If your application requires high RPM potential you should use a solid roller design.

Solid/Mechanical Flat Tappet The solid/mechanical tappet is essentially a solid "link" between the cam lobe and the pushrod. In most cases, it is a simple heat treated cylinder with a radiused contact face. It allows more RPM potential than that of the hydraulic tappet since there are no worries about the inability of the lifter to "bleed down." Solid lifters do, however, require lash or clearance to allow for part expansion as the engine heats up.

Solid/Mechanical Roller The solid/mechanical roller tappet allows for the most aggressive lobe designs. Roller tappets allow faster, "steeper" opening and closing ramps. This allows the cam to produce more lift for a given duration. They are not limited to a particular lifter diameter to obtain higher cam lifts. They also contain a roller that reduces friction between the cam and followers. Roller cams require the use of higher valve spring forces, making high engine speeds (over 10,000 RPM) possible.

Flat Tappet vs. Roller

Manufacturers and racers have used flat tappet camshaft systems over the years with great success. However, most favor roller tappet cams (when rules permit their use) because roller cams have distinct advantages over flat tappets.

Friction Sliding frictional forces are higher than rolling frictional forces. Therefore, a roller cam takes less horsepower to turn and generally does not wear out as quickly. An added benefit is that roller tappets do not require replacement when changing cams. And, if "pop-up" solid roller tappets are used, the cam can be swapped without removing the intake manifold.

Profile If a cam profile has more "area under the curve" it has the potential to make more power and torque. Roller profiles can be more "aggressive" and accelerate the tappet more than a flat tappet profile. Flat tappet profiles can only be shaped up to the point where the tappet "digs into" the profile. Roller tappet profiles are not limited by this condition ? so much so that even "inverted radius" profiles are possible.

This benefits engine performance in two ways: more tappet lift can be achieved without the added duration that would normally be required to "ramp up" a flat tappet to the added lift ? making the curve more "pointy;" the lift curve can be made "broader" without increasing lift. Of course, both of these benefits can be combined to create a profile that can easily outperform flat tappet cams.

Cost Unfortunately, roller camshaft systems cost more than a flat tappet cam and lifters. Much of the added cost is due to the lifters. However, roller tappets can be reused, whereas flat tappets can not. If you tear down your engines frequently, the rollers can be used over and over again, provided they are not damaged or show signs of wear.

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PUSHRODS

timing sets

miscELLANEOUS

CAMSHAFTS

CAMSHAFT TECH INFO

Should I Install New Lifters with My New Camshaft?

If you are installing a new flat tappet camshaft in your engine, you MUST install new lifters. The lifter/lobe contact area is under a tremendous amount of pressure, and the lifter and lobe must establish a rotating pattern together. The following illustration demonstrates why:

NEW CAM WITH NEW LIFTERS

NEW CAM WITH USED LIFTERS

LIFTERS

VALVE SPRINGS

ROCKER ARMS

PUSHRODS

TIMING SETS

A new lifter has a "crown." A new cam has a tapered face for lifter rotation. The wear pattern will be offset, allowing the lifter to rotate.

Lifter Face

Correct

Installing a new cam with used lifters creates a concentrated contact pattern on the edge of the cam lobe...

...which eventually wears the edge of the lobe and the lifter. Soon, the cam lobe wears down and the lifter stops rotating.

Incorrect

Lifter Face

Flat

Concave

TECH TIP

Lunati recommends replacing lifters with most roller and all flat tappet camshafts that we sell. See the camshaft and matching component charts on pages 14-271. Using the recommended Lunati lifters will ensure that you have a "matched" valvetrain system that will yield maximum performance and durability.

Tech Support: 662-892-1500 :: 5

MISCELLANEOUS

CAMSHAFTS

lifters

CAMSHAFT TECH INFO

Understanding Cam Profile Terms

Ramps ? The parts of a camshaft lobe that actually initiate the lifting and descending movement of the lifter. Ramps include the lash ramp, the opening ramp and the closing ramp. Camshaft lobe ramps are ground to have different rates of lifter movement in terms of velocity and degrees of duration, as measured in degrees of crankshaft rotation.

The "lash ramp" of a camshaft lobe is the transition between the base circle and the opening or closing ramp.

The "opening ramp" of a camshaft lobe is the point where the lifter just begins to lift until the point that it reaches the nose of the lobe.

The "closing ramp" is the point of the camshaft lobe from the nose back down to the lash ramp.

Nose ? The top or the highest maximum lift point for the valve. It is where valves are kept open for as long as possible before making the transition to the closing ramp.

Base Circle ? Also known as the "heel," it is the lowest point of the camshaft lobe and is the place where the valve is in the closed position. The base circle is the point where all valve lash settings are made.

Symmetrical ? A term that refers to the "profiles" of the opening and closing ramps of a camshaft lobe. All "early technology" camshafts were ground on a symmetrical design, meaning both sides are exactly the same. That is to say the profile of the closing ramp is a "mirror image" of the opening ramp.

Asymmetrical ? Refers to a camshaft lobe profile where the opening and closing ramps are not exactly the same. The reason some camshafts are this way is to try to achieve an opening ramp profile that has a high velocity and a closing ramp profile that has a slower velocity. In this way, the valve can be set down more "gently" than the rate at which it was first opened.

Dual Pattern ? A camshaft that has an intake lobe profile design that differs from that of the exhaust lobe profile design. For example, Camshaft A has intake lobes of 260? duration while the exhaust lobes are 270? duration. Camshaft B has intake and exhaust lobes that are both at 260?. Camshaft A is referred to as a dual pattern, while Camshaft B is referred to as a single pattern.

With the advent of emissions laws and the widespread use of computer systems, more modern single and dual profile pattern designs have been developed. A dual pattern camshaft is ground to bias the duration of either the intake or exhaust lobe. For example, if an engine is restricted on the exhaust side, compared to the intake side, the camshaft designer would try to compensate by grinding in more lift and/or duration on the exhaust lobe.

VALVE SPRINGS

ROCKER ARMS

PUSHRODS

Nose Closing Ramp

Lobe Center Line Lift

Camshaft "A"

Camshaft "B"

timing sets

Lash Ramp

Opening Ramp

Base Circle

Heel

Symmetrical

Asymmetrical

miscELLANEOUS

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