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Summit Racing™ Pro BBC Big Nasty Stroker Edition LS Firing Order Hydraulic Retro-Fit Roller Cams SUM-1347
Part Number: SUM-1347
Summit Racing™ Pro BBC Big Nasty Stroker Edition LS Firing Order Hydraulic Retro-Fit Roller Cams
Pro BBC Big Nasty 3 Hyd. Retro-Roller "Stroker", LS Firing Order, 234/247 Dur. 108 LSA + 3 Adv. .550/.550 lift with 1.7, .582/.582 with 1.8
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Overview
Brand:
Manufacturer's Part Number:
SUM-1347
Part Type:
Product Line:
Summit Racing Part Number:
SUM-1347
Item Number:
8819537
UPC:
190861385887
Cam Style:
Hydraulic roller, Retro-fit
Camshaft Use:
Truck/Street/Strip
Camshaft Manufacturers Description:
Pro BBC Big Nasty 3 Hyd. Retro-Roller - Stroker Edition with LS Firing Order. Big Nasty Strokers all have the same overlap, so pick the power band you that makes you smile when you put the hammer down! Big Nasty 3 has the strongest top-end power! Gear or a deeper stall helpful to get the engine up "On-The-Cam".
Basic Operating RPM Range:
3,200-6,600
Intake Duration at 050 inch Lift:
234
Exhaust Duration at 050 inch Lift:
247
Duration at 050 inch Lift:
234 int./247 exh.
Advertised Intake Duration:
292
Advertised Exhaust Duration:
302
Advertised Duration:
292 int./302 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.550 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.550 in.
Valve Lift with Factory Rocker Arm Ratio:
0.550 int./0.550 exh.
Lobe Separation (degrees):
108
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
Billet cams require a melonized or composite distributor gear and a bronze tip fuel pump push rod. Link-bar lifters required. Piston-to-valve clearance with factory pistons is usually fine. LS Firing order requires spark plug wire rerouting.
Summit Racing™ Pro BBC Big Nasty Stroker Edition LS Firing Order Hydraulic Retro-Fit Roller Cams
Summit Racing™ Pro BBC Big Nasty Stroker Edition cams are hydraulic roller retro-fit camshafts designed for older big block Chevys, using modern LS-series firing orders (1-8-7-2-6-5-4-3) to improve performance, reduce harmonics, and lower detonation risk. They feature 4-7/2-3 swap technology, aggressive lobe profiles, and are precision-ground on billet steel cores for high-RPM stability.
Key features and benefits:
* LS firing order: Reduces bearing load and improves combustion stability
* The "Big Nasty" provides strong mid-range and high-RPM power, with high lift suited to upgraded cylinder heads
* Retro-fit/hydraulic roller: Designed to install in older engines that used flat-tappet cams, featuring drop-in link bar lifters
* Billet core: High-quality hardened steel requiring a melonized or composite distributor gear
* Requirement: Requires a cam button to hold the cam in place
* Typical applications: These cams are often used in high-performance street and strip engines, particularly stroker combinations where the "Big Nasty" profile provides a noticeable idle and top-end power
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