Billet Roller Cam Packages 4.0 4.2 Jeep AMC
Newcomer Racing "Billet Roller" Cam Package is the answer that we have all been waiting for and now we finally have a solid answer to the dreaded cast core flat tappet cam/lifter durability and supply issues.
Now let's get to the good stuff, these cams are 100% "Made in the USA" micro-polished billet cores with the industry's best high-end Morel pressure feed needle bearing hydraulic & optional solid roller Tie-bar lifters that are a drop-in unit (No machining required). That means, no more wiped/failed cam lobes that will destroy your new or classic 4.0/4.2 engine. Our lobe designs are easy on the valve train with minimal noise unlike other companies yet take full advantage of that big roller lobe design.
-We also answered any cam sync/distributor gear issues with a custom Melonized gear. This will need to be a mandatory option when ordering a billet cam, factory or aftermarket gears are not compatible.
-Next, we have a brand new designed Rollmaster billet timing set with a built in Torrington bearing to control the thrust load between the block and the rear cam timing gear, which is an 4.0/4.2 industry first.
-For 1999-2006 "Thrust Plate" style blocks this will be a direct drop-in swap with our new true double roller timing set (You can also swap from the thrust style, back to the older style without any issues by simply ordering an older style kit).
-For 1964-1998 "Non thrust plate" blocks, you will receive a new Bolt/solid pin with shims to properly set your end play (You cannot swap to a newer thrust style cam).
You will need different pushrods with the new roller lifter height difference, and we have custom 5/16" or 3/8" .080" hardened pushrods ready (5/16" for all stock style heads or unmachined pushrod tubes, 3/8" for machined pushrod tubes or Edelbrock/Hesco heads). Since there are several factors that dictate pushrod length, we will need to know if the head and block have been decked, and how much. Then what rocker arm manufacturer. Worst case scenario, simply mockup up your combo and give us a call or place an order online. During your check out, you can type any needed info in the notes section.
We have so many awesome roller cam options available that picking your favorite cam can sometimes be a daunting process. That's why we added descriptions to each cam profile to help aid in your decision.
Basic things to consider when choosing your cam:
- RPM range and where you want your powerband.
- Application (Daily Driver/Off-road/Racing/Multi-purpose)
- Weight
- Transmission (Manual or Auto)
- Gearing
- Engine Size
- Compression
- Induction/Exhaust (Stock or Modified)
- Exhaust Tone vs Engine Smoothness at idle.
Our cam grind part numbers are as follows:
HR indicates "Hydraulic Roller", MR indicates "Mechanical Roller", LL indicates "Low Lift", NSR indicates "No Springs Required", SR indicates "Springs Required" and T is for "Trust Plate".
Low Lift(LL) version cams are No Springs Required(NSR) which means you can run your stock springs but always check for coil bind. Stock spring specs are normally around 50-60lbs on the seat and 200-220 range open and good for around .460" lift.
"Springs Required(SR)" you will need to target 110-130(seat) and 275-325(open) pressures for most cams above NSR. For larger cams such as NR-130 and above, they may require more open pressure.
All of our cam spec numbers are based on a stock 1.6 rocker ratio. If you go to an upgraded 1.7 rocker ratio this will inherently raise your total lift values, so be aware when choosing for your springs max lift values.
On any of our cam kits or anyone else's for that matter, do yourself a favor and degree your cam, this will save you dividends in the end, trust us! Also, every single stock motor can benefit greatly from just a proper custom computer tune, we have done it, so we recommend custom tuning to maximize all that work and money invested to increase your usable power.
When other companies say no tuning required to get your sale, don't believe it, yes it will run, but no it will not be nearly as efficient. From the smallest cam to the biggest, the more you do to enhance the overall efficiency, from induction, exhaust or the rotating assembly on your setup, the better it will perform. This multiples and becomes more important as you go up in cam size.
***LAST THING***
THIS LISTING IS GIVING YOU THE ABILITY TO MAKE YOUR CAM PACKAGE AS NEEDED. IT DOES NOT COME WITH EVERYTHING UNLESS YOU CHOOSE IT. 'CHOOSING A CAM ONLY, WILL GIVE YOU A CAM ONLY"
*NR-119-HR-NSR(200/200 108 .425") Powerband idle-4,500rpm's This is the original High Output factory spec-based cam with a slight tweak for that factory feel, yet only better now in a long-lasting billet roller. This can be used as a drop in cam for stock style headed motors yet still leaves room on the table for an increased rocker ratio with the factory spring setup. "High Output"
*NR-120LL-HR-NSR(208/212 112 .425"/.425") Powerband Idle-5,000rpm's with a deep smooth idle quality, great stock cam replacement upgrade that works with a stock stall converter and all stock components that can make great small quick spooling turbo or supercharger cam. This is our "Low lift" version option for a drop-in cam upgrade while still retaining stock springs to avoid spring pocket clearance machining and yet still allowing room for a 1.7 roller rocker upgrade. "Mr. Smooth-Low Lift"
NR-120-HR-SR(208/212 112 .480"/.507") Powerband Idle-5,000rpm's with a deep smooth idle quality, great stock cam replacement upgrade that works with a stock stall converter and all stock components that can make great small quick spooling turbo or supercharger cam. "Mr. Smooth"
*NR-121LL-HR-NSR (212/216 110 .425"/.425") Powerband 1,200-5,500rpm's with a noticeable deep idle quality, the most aggressive cam we recommend using with stock springs. Works well with all stock vehicle components, with upgrades just keeps showing gains. This is our "Low lift" version option for a drop-in cam upgrade while still retaining stock springs to avoid spring pocket clearance machining and yet still allowing room for a 1.7 roller rocker upgrade. "300HP-Low Lift"
NR-121-HR-SR (212/216 110 .507"/.507") Powerband 1,200-5,500rpm's with a noticeable deep idle quality, the most aggressive cam we recommend using with stock springs. Works well with all stock vehicle components, with upgrades just keeps showing gains. "300HP"
NR-122-HR-SR (212/222 114 .507"/.544") Powerband 1,400-6,000rpm's with a noticeable deep idle quality, this is the first step up the ladder that requires a spring with more lift capabilities. This makes a great entry level cam combo with our competition head for those who want to utilize added lift, with our 1.7 roller rockers you will net .557"/.574", works with stock stall converter. "Lightning".
NR-123-HR-SR (212/208 112 .507"/.480") Powerband 1,200-5,400rpm's this is the weird cam profile of the bunch but don't let that fool you this little guy works awesome with a wide power band. This profile works well on any application and gives plenty of intake cylinder filling with the added duration. Stock short block or lower compression for low octane usage this is your cam. Works well with stock stall, increased lift springs required. "Odd Ball"
NR-124-HR-SR (212/212 113 .507"/.507") Powerband 1,200-5,600rpm's this little guy is a great all-around cam for naturally aspirated or forced induction combos. We have tested this one extensively in the "Mutt" 4.0 motor on the engine dyno (326hp/343tq on boost 550whp/600whp), on street, towing and racing. At a stock idle this cam will have a slight deep lope, increased spring rate and added clearance required. Works with stock stall converter. "Mutt"
NR-125-HR-SR (216/224 112 .507"/.544") Powerband 1,500-5,900rpm's this one will have a slight aggressive lope at stock idle. Now you're starting to get up in the cam area where induction and exhaust upgrades will start to become options to utilize the benefits of this cam. We have run this cam profile for 15+ years and made killer power numbers in daily drivers to all out-race rigs. This is a great starter in the aggressive cams yet yields great driving manners and yet you can twist that tach to 6,000 rpms. Still works with a stock stall, but with a 2,000-2,400 stall you will benefit. "Old Faithful"
NR-126-HR-SR (220/226 112 .544"/.544") Powerband 1,600-6,200rpm's now we are getting somewhere. This cam needs head, induction and exhaust upgrades to serve it well with more compression or forced induction this thing rips. We have made well over 400+hp with this cam with a built stroker. This one lopes without a doubt and with a 1.7 rocker it pumps out .578"/.578" lift. "Bump and Grind"
NR-127-HR-SR (228/228 113 .544"/.544") Powerband 1,900-6,200rpm's this mid-sized powerhouse single pattern cam will make some noise, the good kind. An all-around great performance cam for NA and boosted applications. Get your build on point to reap the benefits or simply throw the boost at it for an aggressive daily driver and set that idle to 750rpm's. "Boosted"
NR-128-HR-SR (228/232 110 .544"/.544") Powerband 2,000-6,200rpm's if you want to get noticed or hated this is your cam. With surprisingly great driving manners this cam with turn heads at the stop light with a healthy lopey idle quality. This one will need all the induction upgrades along with a 2,500 stall, manuals let it rip! Have your build with induction and exhaust upgrades on point and raise that idle to 800rpm's. "350HP"
NR-129-HR (234/234 113 .544"/544"). Powerband 2,400-6,400rpm's dual purpose single pattern powerhouse. If you want that aggressive chop at idle with your NA build or forced induction, this one fits the bill. For forced induction cam this top of the ladder for a daily driver/street machine. "Maniac"
NR-130-HR-SR (236/244 110 .586"/.586") Powerband 2,600-6,400rpm's now business is picking up. This can be a street/race cam with a very healthy lopey idle, no mistaking this bad boy is made to be seen. Stock idle will need to be raised to at least 800rpm's for a nice crisp pop out the tail pipe. With a 1.7 roller rocker this one hits .574"/.598" on lift, 2,600-3,000 stall required. "Street Terror"
NR-131-HR-SR (244/252 108 .586"/.586") Powerband 3,000-6,600rpm's talk about a noise maker this one fits the bill, straight up race or hard core street machine if you dare. If you have never heard a built inline with a nasty cam trust us they sound amazing, similar to a BBC if using a 6 to 1 header. This one is made for naturally aspirated applications where compression will be your friend. 3,000 stall required, or sticks, grab a good clutch and give it hell. "McNasty"
NR-132-MR-SR (264/272 106 .586"/.586") Powerband 3,600-7,200rpm's all out race only here unless you want to be a total badass on the street. This one needs compression, flow and some great parts so this thing can spin to 7,000+rpm's. A Jeep/AMC motor changes tones around 6,000 rpm's, the kinda tone that makes the hair stand up on your neck. Well, this one goes way past that point so hold on to your seat. With all the supporting mods this cam will make 500hp NA and make people cringe at the wicked snap crackle pop sound. Make sure you run a fully counter weighted crank at these rpm's. "Widow Maker"
**VERY IMPORTANT**
We have discovered through testing that these roller lifters require the preload to be set between .010"-.030". Setting this by pushrod length is nearly impossible on every cylinder. We highly advise moving to an adjustable roller rocker arm for ease. In doing so, you will need a taller valve cover or our billet valve cover spacer kit for added clearance, then our billet thermostat housing to clear the raised valve cover. We have more Lightweight rocker arms kits on the way as well.
***Tech tip for customers wanting to go with a more aggressive camshaft. To run a larger style camshaft that will turn over 5,500 rpm's you will absolutely need a harmonic balancer. Our ATI balancer will become a key component to achieve harmonic control of your in-liner. If you do not address this area it will absolutely create problems in trying to run higher rpm's.