“Competition brings out the best in products,” once spake David Patterson and we tend to agree. Unfortunately, the field of competition has shrank somewhat in the Mopar aftermarket and many feel stuck with one or two big dollar manufacturers. That’s why it’s a good thing that Summit Racing has stepped up with a new line of Pro Mopar Hydraulic Roller Camshafts.
These cams are designed to offer big leaps in performance – whether you’re building a LA/Magnum small block or a B/RB big block Chrysler powerplant, and do so reliably. Offering Stages 1 through 4, Summit Racing’s Pro Mopar Hydraulic Roller Camshafts are made on “the latest Landis CNC grinders using a CBN (cubic boron nitride) diamond grinding wheel for superior roundness, eccentricity, and runout.”
Here’s the original press release:
With modern oil lacking the critical zinc and phosphorous (aka ZDDP) needed to keep hydraulic flat tappet cams and lifters happy and healthy, running one in your engine these days feels less like smart engine building and more like a high-stakes game of Russian roulette.
That’s why you need to make the move to a Summit Racing™ Pro Mopar Hydraulic Roller Camshaft. The roller lifter’s design dramatically reduces friction between the lifter and cam lobe compared to the sliding motion of a flat tappet, significantly reducing wear and extending camshaft life with off-the-shelf oils.
Available for small block LA/Magnum and big block B/RB engines, the cams are made in the USA from billet steel blanks that are much stronger and more durable than the cast iron cams of yore. They’re ground on the latest Landis CNC grinders using a CBN (cubic boron nitride) diamond grinding wheel for superior roundness, eccentricity, and runout.
The advanced lobe designs deliver consistent power when used with modified factory or aftermarket performance cylinder heads from Trick Flow Specialties, AFR, Edelbrock, or ProMaxx. The lobe intensity is aggressive without being hard on the valvetrain, opening and closing the valves faster for better airflow and higher efficiency. High-RPM stability is also improved for use with beehive or the lightweight, small-diameter dual valve springs favored by engine builders today.
Pro Mopar Hydraulic Roller Camshafts for B/RB Engines
Summit Racing™ Pro Mopar Hydraulic Roller Camshafts for big block Mopar B/RB Engines are available in five profiles, covering everything from daily drivers to serious street brawlers and bracket racers.
The Stage 1 cam has a noticeable lope at idle. It delivers excellent bottom-end power that continues into the mid-range, with peak power occurring between 1,800-5,800 RPM. This makes it a great pick for heavy cars and trucks that do some towing. It pairs very well with OEM torque converters and highway gearing.
The Stage 2 and 3 cams are the hot street/mild strip cams of the group. They have a mild, steady idle lope and deliver an awesome mid-range pull, with power coming on strong at 2,200 RPM and continuing until 6,000 RPM. Add in a mild stall torque converter and deeper gears to get the most performance out of them.
Stage 4 and 5 cams ratchet up the performance meter even higher. They have a seriously choppy idle that’ll turn heads when you roll by. To get the full effect of the hard-hitting 2,600-6,600 RPM range, you’ll want to combine these cams with headers, free-flowing exhaust, 3,000-plus RPM converters, and steeper gearing. Figure on adding a vacuum cannister to the mix if your whip has power brakes.
Pro Mopar Hydraulic Roller Camshafts for LA and Magnum Engines
There are four Summit Racing Pro Mopar Hydraulic Roller Cams available for the LA and Magnum small blocks, beginning with a great daily driver cam and ending with a pair of radical street/strip cams.
The Stage 1 cam is what should have been in the engine from the factory. It works amazingly in heavy cars and trucks with OEM converters and highway gearing. It delivers good performance down low along with a noticeable idle and a usable power range between 1,800-5,800 RPM.
The Stage 2 cam is the one you want to perk up your weekend hot rod. It offers a mild lope; excellent mid-range power from 2,300-6,000 RPM; and works with power brakes and OEM torque converters. Add some deeper gears for a little more kick.
Serious performance junkies will gravitate to Stage 3 and 4 cams. Turning the key will reward you with a steady, choppy idle. When you drop the hammer, you’ll be pinned to the seat by the extremely strong mid- to top-end rush that occurs between 3,200-6,900 RPM. To get the most out of these cams, add a set of headers, free-flowing exhaust, 3,000-plus RPM converters, lower gears, and a vacuum canister to keep your power brakes working.
For even more detail and full specifications on the Summit Racing™ Pro Mopar Hydraulic Roller Camshafts, check out this in-depth story from our pals at OnAllCylinders.com.
