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178/208 Camshaft (fits 89-2018 Cummins)
103 Valve Springs (NOTE: does not come with retainers)
Information:
- RPM Range: Idle-4000
- Drops EGT 200-300
- Better fuel economy 1-3 MPG+
- Quicker spool up
- Duration at .050″ of lift 178 Intake, 208 Exhaust
Addition Information:
- Due
to its short duration and wide lobe separation angle, it also has the
least overlap (when intake and exhaust valves are open at the same time)
of any of our cams to kill in cylinder EGR on engines that have higher
drive pressure than boost pressure.
- If
you live at high altitudes, operate at low rpm or are looking for the
best efficiency possible, this cam will help you considerably
Modification Required:
- For
it to be “drop in” on a 12v you will need no more than .025″ piston
protrusion and at least .055″ valve face depth with a standard head
gasket and a 99 intake centerline. On a 98 – 02 24v you will need no
more than .025″ piston protrusion and at least .038″ valve face depth
with a standard gasket. On an 03 and up, it needs .018″piston protrusion
and at least .038″ valve face depth with a standard gasket. If you do
not meet the minimum requirements for piston to valve clearance, don’t
worry, you can still run an oversize head gasket or cut valve reliefs.
- Although this is considered a drop in cam it is important to check clearances (You can use our clearance calculator to make it a little easier)
- We always recommend new lifters when changing a cam.
Applications:
- low rpm efficiency
- any size turbo, large or small
- Meant for increased all around efficiency
Break in:
To make sure that you have no issues during break-in, follow these few suggestions.
- Make sure that the cam has a Liberal amount of quality assembly lube applied
- DO NOT let the engine start without oil pressure
- When this is a new engine, be sure to put a liberal amount of assembly lube in the oil pump and prime the oil filter
- Be
sure to change the oil after you have done your break-in procedure.
When the filter and oil system are already primed, engine will get oil
pressure much faster than if the oil is changed at the same time.
- Disconnect
the fuel system and spin the engine with the starter until oil pressure
can be read or until oil is coming out of the rocker arms.
- Do not let the starter run for more than 10 seconds at a time
- Once oil pressure has been verified, let the engine start and run for five minutes at 1200-1500rpm then shut engine down
- Adjust valves then you are cleared to abuse your engine. Enjoy the added airflow
- if
you need to re-torque or “hot-torque “the head, do so before adjusting
valves. Re-torqueing the head changes the valve lash setting, so it is
important to set lash last.
Cam Info:
178/208-110
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Lift
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Duration
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Timing
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Timing
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C/L
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TDC
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Intake
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Cam Lift
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0.2900
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178.0
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-10.0
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8.0
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99.0
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0.0190
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Valve Lift
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0.4002
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178.0
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-10.0
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8.0
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99.0
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0.0260
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Exhaust
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|
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Cam Lift
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0.3200
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208.0
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45.0
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-17.0
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121.0
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0.0160
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Valve Lift
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0.4288
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208.0
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45.0
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-17.0
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121.0
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0.0210
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