Summit Racing™ Pro BBC Tight-Lash LS Firing Order Solid Roller Camshafts SUM-1287

Name: Summit Racing™ Pro BBC Tight-Lash LS Firing Order Solid Roller Camshafts
Brand: Summit Racing
SKU: SUM-1287
Price: 469.99 USD
Availability: InStock
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Part Number: SUM-1287

$469.99

Summit Racing™ Pro BBC Tight-Lash LS Firing Order Solid Roller Camshafts

Summit Pro BBC Tight-Lash Solid Roller Cam 7, 272 Int. / 282 Exh. Dur. @ .050, 110 LSA + 2 Adv., .737/.737 lift with 1.7 rocker, .780/.780 w/ 1.8
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Summit Racing™ Pro BBC Tight-Lash LS Firing Order Solid Roller Camshafts SUM-1287

SUM-1287

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Part Number: SUM-1287

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$469.99

Overview

Applications

Q&A

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Overview

Brand:

Summit Racing

Manufacturer's Part Number:

SUM-1287

Part Type:

Camshafts

Product Line:

Summit Racing™ Pro BBC Tight-Lash LS Firing Order Solid Roller Camshafts

Summit Racing Part Number:

SUM-1287

Item Number:

8693989

UPC:

190861381735

Cam Style:

Solid roller, Retro-fit

Camshaft Use:

Street/Strip/Racing

Camshaft Manufacturers Description:

Summit Pro BBC Tight-Lash Solid Roller Cam 7, Retrofit, Spintron tested for excellent stability at high RPM. Small-Diameter Light-Weight Duals such as SUM-174040DP-16 .050 out of bind recommended. Ti Intake valve recommended for 7,500+ RPM operation. Min. .005 cold lash OK with .016 Int. / .018 Exh. Hot Lash most common.

Basic Operating RPM Range:

4,500-7,500

Intake Duration at 050 inch Lift:

272

Exhaust Duration at 050 inch Lift:

282

Duration at 050 inch Lift:

272 int./282 exh.

Advertised Intake Duration:

304

Advertised Exhaust Duration:

315

Advertised Duration:

304 int./315 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:

0.736 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:

0.736 in.

Valve Lift with Factory Rocker Arm Ratio:

0.736 int./0.736 exh.

Lobe Separation (degrees):

110

Camshaft Gear Attachment:

3-bolt

Remanufactured:

Computer-Controlled Compatible:

Valve Springs Required:

Yes

Quantity:

Sold individually.

Notes:

Billet cams require Melonized or composite distributor gears and bronze-tipped fuel pump push rods. LS Firing order requires spark plug wire re-routing. Recommended hot lash is 0.016 In. Intake./0.018 In. Exhaust. Recommended starting cold lash is 0.005 In. A cam button-equipped timing cover recommended.

Summit Racing™ Pro BBC Tight-Lash LS Firing Order Solid Roller Camshafts

Summit Racing™ Pro BBC Tight-Lash LS Firing Order solid roller camshafts are high performance, American-made camshafts designed for big block Chevys using the modern 1-8-7-2-6-5-4-3 firing order. They feature "tight-lash" technology for reduced noise, Spintron-tested aggressive lobes for high-RPM stability, and are compatible with Beehive or small-diameter dual valve springs.

Key features and benefits:

* LS firing order: Swaps the 4-7/2-3 cylinders to reduce harmful harmonics, decrease bearing wear, and improve detonation resistance
* Tight-Lash design: Designed for very low hot lash settings, which reduces valvetrain noise and increases durability compared to traditional, loose-lash solid rollers
* Advanced profiles: Feature aggressive, Spintron-tested lobes designed for high-RPM stability and maximum power, often utilizing modern, lightweight spring packages
* Construction: Made from hardened bearing steel billets and ground on a Landis 3L for precision, ensuring high quality for street, strip, or racing applications
* Compatibility: Designed with lifts suitable for most aftermarket heads or modified factory castings
* Application notes:
-- Requires a camshaft button and specific timing covers
-- Requires a melonized or composite distributor gear
-- Requires rearranging spark plug wires for the new firing order
-- Solid roller lifters are required