The core design

cam

Most cam companies use modified factory camshafts or skimpy OEM copies and then regrind them. Most of these end up being marine 12v cams with the long bolt or Common rail cams that have to heavily modified to make a performance grind fit on the cam. This usually ends up with the cam being too narrow, too soft or both! We have the BEST cast billet on the market, guaranteed! Don’t sacrifice putting a $59 12v cam in your expensive engine or worst yet a re-grind.

Our Cams Feature:

Shop around and ask others how wide their lobes are. If they say their cam is made just for them, ask them if their name is cast into the cam. I bet you it isn’t!

HDBS-105 1989-current 12v and 24v 5.9 and 6.7 engines $549

This cam came about after I couldn’t find a cam that did exactly what I wanted. Other cams worked well for towing but lacked major performance gains at higher RPM. Some cams showed marginal performance gains. Other cams spooled good but compromised efficiency to get the chargers lit. All the others were either old gasoline profiles that didn’t work well on the street or skimpy regrinds that were just a stab in the dark. Generally shrouded in secrecy, it can sometimes be quite a task to make an informed decision on diesel engine parts, especially a camshaft.

We are here to inform you so, look at all our specs. If you don’t like what you see look at our custom cam page or call us. Still not happy? Ask the competition for all of their specs and see how we measure up. We are here to get you the absolute best cam for your specific truck, the first time.

cams standing up

After one year, and 50 cams, we settled on this design for our flagship camshaft. The 181/210 is our standard camshaft for the B series Cummins. 181° .280” intake, 210° .307” exhaust. This is the cam that the factory should have come out with from the start. It spools great from right off idle and makes good power to just over 4000rpm. On trucks that are over fueled you will see a drastic reduction in smoke and EGT. We have seen a 28 to 40+ hp increase trucks using this cam with. It is forgiving on engines with high drive pressures. It is the best all around cam for street trucks with occasional track use and does not sacrifice torque efficiency or fuel economy for spool up. Works best when the intake is installed from 98° to 100° centerline. You should not need to fly cut the pistons; however it is up to the customer to insure installed centerlines, piston protrusion, and valve face depth.

Keep in mind that some Cummins cam gears have slightly different offsets built in. We suggest you inspect your tappet for wear. If they are worn either get them reground by Colt Cams, or get new ones. If you are installing this cam in a 12v please replace factory tappets with tappets from a 1998-2002 24v for best longevity with low zinc oils. On engines seeing over 50psi or over 500hp we also suggest 110lbs 24v springs or our 165lbs 12v springs springs and Hamilton pushrods. Follow Cummins installation instructions, use adequate assembly lube, and add some of our zinc additive prior to startup, to ensure no break in damage due to the new low zinc oils on the market. Always keep the engine from starting until you visually verify that oil has made it all the way to the rocker arms.

To modify installed centerline, use Mopar performance offset keys part# p4349650. This offset key kit comes with 1°, 2°,3°,4° and 5° offset keys. Just remember 1° camshaft is 2° crankshaft since the crankshaft moves twice the speed of the cam. A basic degree wheel from Jegs or Summit, a small amount of wire and a dial indicator is all that is needed to degree a cam in.

Use the 181/210 cut on a 105.5LSA for best efficiency and the 181/210 on a 107 LSA for better spool for racing with larger turbo chargers.

Here are some of the benefits you will see with our 181/210

Factory specifications for comparison:

12V Stock:
INT: 159° .235” Lift
EX: 204° .263” Lift
102 LDA

24V Stock:
INT: 159° .235” Lift
EX: 206° .297” Lift
107.5 LDA

24V 3rd gen:
INT: 163° .237” Lift
EX: 191° .299” Lift
98.5 LDA

24v 6.7L:
INT: .237” Lift
EX: .299” Lift

 
call us at 512.804.9015

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