Why cold air is vital for the engine?
6.7 cummins cold air intakes can be so beneficial for the engine. It increases airflow to the engines, facilitated combustion, adds extra horsepower, better throttle response.
Besides, they help to reduce contamination inside the engine, increase its service life with efficiency. It also keeps the engine temperature at a constant low level and prevents it from damages
7 cummins specs
6.7 cummins is a six-cylinder turbocharged diesel engine. It is renowned worldwide for its high performance and lightweight.
Here we have two different models of 6.7 cummins diesel engine.
Model- HO- w/Aisin
- Horsepower- 400
- Torque- 1000
- Size- 7 L
- Cylinder count- 6
- Bore- 107 mm
- Stroke- 124 mm
- Compression ratio: 16:2:1
- Engine wet weight: 1060 lbs
- Fuel mechanism: Bosch-HPCR
- Aspiration- Turbocharged
Model- SO-w/68RFE Auto
- Horsepower- 370
- Torque- 850
- Size – 6.7 L
- Cylinder count-6
- Bore- 107 mm
- Stroke- 124 mm
- Compression ratio- 19:1
- Wet weight- 1060lbs
- Fuel mechanism: Bosch HPCR
- Aspiration- Turbocharged
Cummins intake manifold
The engine intake manifold is a part of the engine which supply air-fuel mixture to the engine cylinder. In a nutshell, an engine manifold distributes the combustion mixture evenly. It is essential for optimized engine performance. It also mounts throttle body, fuel injection, and other engine components. Buying a 6.7 cummins intake manifold may cost around $400
Cummins intake horn
Cummins air intake horn is pretty similar to the intake manifold that is used to distribute the combustion mixture to each cylinder evenly. It keeps the low temperature inside the engine and ensures the highest performance
What cold air intake gives the most horsepower?
The best Cold Air intake for 6.7 Cummins is supposed to be the S&B cold air intakes. It adds a decent power boost, K&N cold air intakes are not far behind from S&B
How many types of cold air intakes are available there and which is better cold air intake or a short ram?
There are three classes of cold air intakes available in the market.
- Short Ram system: Short ram intakes offer minimal performance boost but still a bit better than factory air intake. It takes the same space of OEM intake; less fabrication work needs to be done, and easy to install.
- True cold air intake: True Cold air intakes are the real players here; it takes a lot of rooms under the hood and takes a healthy price. It can bring more outside and provide a decent power boost. Installing one is quite tricky too.
- Ram air intake: It’s quite similar to true CAI but has a slightly larger tube and air filter in the back. It may suit anyone who is supposed to do racing stuff. The power boost it adds up is enormous.
So, short ram or cold air intake? It actually rests on you, that how much you want to spend, and what performance you expect from your car. If you want a decent power boost up, better throttle response, and better mileage, you should go for cold air intake.
However, if you have a small budget and want some superiority over OEM air intake, then you can go for short ram
Does cold air intake make any difference in performance?
Cold air intake brings a noticeable difference in performance. It brings a vast amount of dense outside air to the engine; it adds up to 15-20 extra horsepower, better throttle response, and increase fuel mileage.
How to clean a 6.7 Cummins turbo?
Cleaning the turbo of 6.7 Cummins is not often necessary, but some time due to excessive soot accumulation, you have to clean it; it’s not a cake to clean the turbo of 6.7 Cummins but a series of steps
Step- #1: Check that if your turbo has a cleaning port, not all 6.7 cummins turbo is equipped with a cleaning port. If you have one, then congratulation if you haven’t. Then we have to install one.
Step- #2: Installing a cleaning port, it’s a quite complicated maneuver so let’s divide it into some sub-steps
- Disconnect the MAF( Mass Air Flow) and TBAP (Inlet Air Temperature/ Pressure) sensor’s power connection from engine harness
- Detach the air filter housing cover and fresh air tube together
- Connect the turbo actuator and turn on vehicle ignition, not the engine
- Disconnect the actuator from the engine harness
- Turn off the vehicle ignition switch
- Disconnect the negative battery cables from each battery and isolate them
- Find the CCV(Closed Crankcase Ventilation) tube hold up screws on the steel section and remove that
- Rotate and pull the CCV tube out of the turbocharger
- Find the turbocharger speed sensor attaching bolt on the top of the turbocharger housing and remove the screw and save for later
- Remove the speed sensor with the o-ring of the turbocharger. Do not leave the o-ring in the bearing housing
- Install the drill/tap guide into the bearing house of the turbocharger and secure the drill with previously removed attaching bolt and tighten the bolt to 10Nm. The ideal drill depth will be no more than 42 mm
- Get a shop vacuum with a crevice attachment end for collecting drill bit fillings. Hold the crevice tool at the closet possible position to drill tip during drilling, and to the tapping tip while aping the drilled hole
- Drill at a slow pace, and a shop vacuum to collect filings, drill a hole through the center housing of the turbocharger, and stop when it makes contact with turbocharger housing
- Now remove the drill and then vacuum any excess metal filing. You can also use a pencil magnet to remove the shaving
- Fit and secure the guide bushing with the more extensive guide bore into drill guide bore
- Install tap into tap bushing bore of the tap guide
- Station the tap handle to the drive end of the tap. Using the tap and tap handle with the shop vacuum, tap previously drilled hole with a casting of 11 ½ turns.
- Remove the tap and tap bushing from tap guide and vacuum excess metal fillings, do the same in the turbocharger center housing
- Install the turbo speed sensor with attaching bolts to center housing and tighten it to 10 Nm
- Setup the turbo cleaning port and then reconnect everything and verify everything is working fine.
Step #3: Clean the turbo: If you had to follow step 2 to install a cleaning port to your turbo, you might be quite tired now, But the work of cleaning is supposed to be begun from now:
- At first, raise the vehicle to a suitable spot and remove all exhaust systems with oxygen sensors and install an oxygen plug temporarily.
- Get the vehicle down and connect the tailpipe with the shop exhaust ventilation system and turn it on.
- Start the engine, get it warm using the Starscan tool, and go like Home>PCM>More Options>System Test>Set Speed 2100 RPM>Follow the promote>Actuate. Now just monitor the temperature
- When it reaches an 82 degree, Celsius stop the engine and remove the cleaning port
- Now install the cleaning nozzle to the tapped hole, insulate the thermal ends of the battery from the cleaning hose
- Connect the hose on the end of the nozzle and take the tap end of the hose under both cable sleeves of the EGR cooler bypass valve assembly,
- Place the cleaning tool valve in the closed position and start the engine to idle with a temperature with 82C
- Place a diesel turbocharger cleaner can to cleaning tool tap and hold it in an upside position.
- Open the cleaning tool cutoff valve and allow 5 minutes to pass the content and close it again.
- Stop the ignition and switch off ignition. And turn on and off the ignition switch without starting the engine for ten times with a 4 seconds interval in each step.
- Repeat these steps (6-10) for a couple more times with dispatching new cleaning can each time and then remove the tool from the nozzle.
- Remove the nozzle from the housing of the turbo and set a stainless steel cleaning port plug into the cleaning port of the turbo
- Remove the battery insulate and raise the vehicle and remove oxygen sensor plugs
- Via cloth and compressed air, clean both oxygen sensors, and install the sensor in place.
- Lower the car and clear all fault codes via a scan tool
The whole process will take something above 120 minutes in expert hands.