SoCal Diesel Alternative Fire Camshaft 2001-2016 LB7/LLY/LBZ/LMM/LML

Part# 3388AF

$1,100.00

WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2001 Thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML Duramax Diesel 

Extend the life of your crankshaft by changing the firing order of your engine. The OEM firing order ends with cylinder 3 and begins with cylinders 1 and 2. The result is a 3-1-2 hit to the crankshaft. Duramax cranks have a tendency to break right behind the first rod throw at the intersection of the second main journal, right where the 3-1-2 hit would stress the crankshaft the most. Coincidence? We think not. After carefully researching the different firing orders available to a V-8 engine, SoCal Diesel was the first to implement this "Alternative Firing Order" camshaft for the Duramax engine. In moving cylinders 3, 1 and 2 away from each other, we have significantly extended the abuse the crankshaft can withstand. Swapping a few pins in the wiring harness will insure the ECM sends the injector signal to the correct cylinder. Wiring diagrams and instructions are included with every purchase. 

Features:

  • The camshaft is an integral part of your engines breathing characteristics. 

  • The camshaft lobe profiles need to be carefully matched to the rest of the engine components in order to achieve maximum performance for any given application. 

  • We have designed profiles to meet many different applications that include dedicated Drag Racing and Sled Pulling. 


Camshaft Options

Stage 1 Camshaft #3388AF Specifications:

  • Does not require any piston valve pockets.

  • Works well from idle past 3800 rpm.

  • Valve Lash .012/.012

  • Works well on the street from a stock truck to a modified street truck with a little extra power, but still needs to tow

Stage 2 Camshaft #6480AF Specifications:

  • This is the #3388 cam's big brother, for those looking for the next level in performance.

  • Requires .050 piston valve pockets.

  • Works well from idle past 4200 rpm.

  • Valve Lash .012/.012

  • Works well on trucks with built motors that need that extra lift and duration to gain some more power

  • This cam is optimized to top out around 1000 hp, if you don't tow and making more power, check out the 9100AF camshaft.

  • We recommend the use of LLY or later lifters. Do not use LB7 lifters.

Drag Race / Sled Pull Camshaft #9100AF

  • Requires .075 piston valve pockets.

  • Works well from 2500-5200 rpm.

  • Requires a high stall converter, about 2800-3000 RPM 

  • Valve Lash .012/.012

  • This cam is designed for drag racing and sled pull use, it will not work well on vehicles that will be towing.

  • We recommend the use of LLY or later lifters. Do not use LB7 lifters.

Drag Race / Sled Pull Camshaft #9200AF

  • Requires .075 piston valve pockets.

  • Works well from 2500-5200 rpm.

  • Requires a high stall converter, about 2800-3000 RPM

  • Valve Lash .012/.012

  • This cam has more lift and duration than the 9100AF cam, allowing for more power. Only recommended on competition use only vehicles.

  • We recommend the use of LLY or later lifters. Do not use LB7 lifters.

Valve Adjustment Procedure:

  • Rotate the engine and adjust one cylinder at a time.

  • When the exhaust valves just begin to open, adjust the intake.

  • When the intake valves are just past maximum lift, adjust the exhaust.

DmaxStore Note:

  • NOT LEGAL FOR SALE OR USE IN CALIFORNIA. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER THE FEDERAL CLEAN AIR ACT (42 U.S.C. § 7522(A)(3))

  • This product is ONLY designed for closed course racing where it is legal to do so. Any other use will be in violation of local, state, and federal laws. We are not responsible for unlawful use of this product.