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 Colt Cams is proud to introduce our latest grinds for the Cummins 5.9L B series engine! We've worked long and hard to develop these great new profiles. We've dyno'ed some 50 different combinations of durations, lobe separation and installed centerlines to come up with the ultimate cam for your Cummins 5.9. We have a large quantity of new cast billets in stock ready for you! Our 5.9L Cummins cams are available in 6 stages. We are always willing to customize alternative grinds as well.
Stage 1: The best grind for fuel economy and bottom end torque!
- Straight drop in
- No clearance issues or springs required
- Lobe separation, higher lift and longer duration, improves air flow by approximately 30%
- Reduces turbo lag, faster spool up
- Greatly improved throttle response
- Approximately 25% reduction in smoke
- 100 – 150° EGT drop
- 1 – 3 MPG increased fuel economy on average
- RPM: Idle – 2700
- Write-up in Diesel Power Magazine
Stage 2: This is very similar to stage 1 but with a longer duration and lift on the exhaust side for engines with a slight restriction—or if you just want a little more exhaust flow.
Stage 3: Nicknamed the "BIG STICK". It has gained the most popularity. This cam delivers the strongest mid-range torque and H.P possible but still has good bottom end and drivability. No mods are required but we do recommend a set of springs.
- Average 2 – 3 MPG increase
- 30 – 35 % smoke decrease
- Approximately 200° EGT drop
- Good to 4000 rpm
At the bottom of this page are the specs for the stock and performance grinds. The secret to the outstanding performance of these cams are their ramp velocity and acceleration.
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Key in this position retards cam.
Reference only.
Colt Cams are all ground to exact C/L’s
for best Results and piston clearance. |
Click on images for a larger view |
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Note: Detail to
fillet radius. |
Optional retainer plate.
(All cams tapped to accept
this on new billets.) |
Comparison of lobe
widths to Colt Cams. |
Comparison of semi
finished chill cast billet
and finished cam. |
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| Cummins 5.9 Cam Spec |
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Duration |
Cam |
Lobe |
Description |
| Prof. I.D.# |
|
@ .050 |
ADV. |
Lift |
Sep |
| |
INT. |
159° |
|
0.235 |
102.0 |
Stock 2nd Generation 12V 1994-1998.5 |
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EXH. |
204° |
|
0.263 |
|
|
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INT. |
159° |
|
0.235 |
107.5 |
Stock 2nd Generation 24V 1998.5-2002 |
| |
EXH. |
206° |
|
0.297 |
|
|
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INT. |
163° |
|
0.237 |
98.5 |
Stock 24V C.R. 2003-2007 |
| |
EXH. |
191° |
|
0.299 |
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| Stage 1 |
INT. |
175° |
|
0.251 |
103.0 |
Hi Torque bottom end Fuel economy cam |
| C.332.S |
EXH. |
206° |
|
0.297 |
|
$300.00 (regrind price) |
| Stage 2 |
INT. |
175° |
|
0.251 |
104.0 |
New Torquer Cam (Better exh. Flow) |
| C.341.S |
EXH. |
210° |
|
0.307 |
|
$325.00 (regrind price) |
| Stage 3 |
INT. |
181° |
|
0.280 |
106.0 |
Big Stick best all round power Cam |
| C.343.S |
EXH. |
210° |
|
0.307 |
|
$375.00 (regrind price) |
| Stage 4 |
INT. |
181° |
|
0.280 |
107.5 |
Straight drop in good to 4400 rpm |
| C.346.S |
EXH. |
218° |
|
0.323 |
|
Phone or use our contact page for price and info |
| Stage 5 |
INT. |
199° |
|
0.296 |
108 |
Valve clearance required good to 5000 rpm |
| C.349.S |
EXH. |
218° |
|
0.323 |
|
Phone or use our contact page for price and info |
| Stage 6 |
INT. |
228° |
|
0.329 |
108.5 |
Valve clearance required. Full race / sled pull
Good to 6000 rpm |
| C.784.S |
EXH. |
244° |
|
0.338 |
|
Phone or use our contact page for price and info |
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Valve lash all grinds INT: .010” EXH .020”
- Follow Cummins installation instructions, use adequate amounts of assembly lube.
- Retainer torque 44 ft lbs – use red lock tight.
- Always use new or re-crowned lifters! The cost for us to re-crown yours is $75.00 US.
- IMPORTANT NOTES:
- C.R. cams cannot grind to stage 3, only to 1 and 2. You must use 24V 2nd core or new cast billet cams for anything over stage 2 grinds.
- When using our new Big Stick Cast Billets, use 2nd gen. 24V lifters only. (From 1998.5 – 2002, use Cummins Part #3942565.)
- If using C.R. lifters with larger head, (also heavier) make sure it clears the fuel pump lobe on # 5cyl., especially on the 12V engines. C.R. blocks are ok but you should still check. If your gear is not pressed on all the way, the lifters could touch.
When sending us your camshaft(s),
please remove the gear(s) before shipping!
CAUTION! IF USING AFTER MARKET CONNECTING RODS,
EXTRA CLEARANCE MAY BE REQUIRED ON CAM CORE!
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| BREAK IN PROCEDURE |
- Cam Lube on all lobes, lifter faces and oil pump gears.
- Oil all bearing journals and lifter barrels.
- Always turn engine over by hand before starting, check for clearances and proper timing location.
- Fire up to 1800 – 2000 rpm. for 18 – 20 minutes.
Note: Most oil companies have taken out a percentage of additives that are meant for anti-scuffing for break in on flat tappet cams, so please ask your local auto parts professional for the best zinc additive they have and add it to your oil before you fire-up your engine for the first time.
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