Fummins Common Rail INFO & FAQ's

Home / Store / Fummins Common Rail INFO & FAQ's

Because we build and drive Fummins we have some great insight to help you. Our trucks are 6.4 08-10 super duty/Common rail engines

For adapter plates/flex plates, we use G-Force
Engine mounts we use Destroked
Tach helper & cruise helper we use swap helper
For a low stall converter, we have had issues with our current supplier and a lack of warranty, we are working with a few new suppliers for a better product. Our old supplier Larry B did a repair on a damaged TC that didn't work or fit, during this we had another TC prepaid for and Larry would only do a partial refund.. We strongly recommend any other unit, it also wise to do business with real businesses (website/google profile etc) link to a similar issue. We highly recommend J&K converters for a custom build and unmatched service
A/C we use a stock Dodge compressor and have Ford lines tig welded on.
The exhaust is stock dodge with the turbo elbow pin removed to allow indexing.
The lower rad hose is a flex hose.
The upper rad hose is a Dodge on the engine, Ford on the rad and aluminum tubing with a universal rad cap adapter and cap to join them.
Overflow is a universal can from Amazon, with the OEM degas removed.
The cooling fan can be the Dodge fan hooked to the Cummins ECM, wired to the Ford ECM, or you go to a mechanical fan from an early gas Dodge truck car quest or advanced 215159 is a good part number for the clutch, then use 7.3 Ford blades and it bolts up.
The alternator can be done with the Dodge alternator or the Ford alternator, if using the Ford you will need to source a bracket from someone like DCS, we have not had any luck with the one-piece bracket commonly found on Facebook Fummins Tech.
Power steering can be done with the Ford pump (DCS bracket), Destroked also has a kit to use a Ford 6.0 pump we have also used a Dodge pump with a custom plate. lines can be joined with compression fitting from any hydraulic shop.
Throttle can be done a few ways, older cable-type apps work on newer ECMs. mount the app's sensor to the Ford pedal or even use a Dodge pedal. DCS has a module but is hit-and-miss results, JMS makes the module and has sold these directly before there's a rumour a new version is coming that will allow the user to adjust it to help match up to the Ford.
For the trans tuning, we have developed the best solution for the 6.4 trucks using HP Tuners (hpt) or EZ Lynk. We have looked at SCT (pro advantage software) and due to the software design, any 6.4 trucks done with sct will not work correctly. For the older 6.0 trucks we have done a few with remote beta testing and had good luck but we are holding off a public release until we can get a truck for a week to further develop and perfect the tuning.
We do our own wiring and currently do not offer a wiring service, DCS/Destroked is your best bet. If you need wiring info send us an email and we will be happy to help.

Tuning Q&A

When needed we will remote into your computer and help/fix any issues

What about bench flashing? bench flashing is ok on something like a truck with a common rail and only the ford side but if there is an issue not being able to data log and see what's wrong is a major issue. Swap trucks have more issues due to the fact they are all unique and all built by different people, we only bench flash 6.4 ECM/TCM's for common rail trucks. If you choose to bench flash from another tuner you will more than likely get a "box tuner" used to flash the ecm and not a true custom tune, beware of where you spend your money.

What vehicles do you guys tune? We tune anything listed on our site and even take on R&D tuning for vehicles not listed

Software and dealer status, Why does this matter? Simply put in the event your flash fails for any reason (weak batteries, aftermarket devices on the can-bus etc) some companies will not help if your tune was done by an unlicensed person and/or they are using a third party "hacked" software. All of our software is 100% supported and we are dealers for all brands we tune with.

Why should I choose Fumming Tuning over anyone else? Simply put we drive these trucks and have put more R&D into our tunes than anyone else.

What about Facebook for tuning or other conversion companies? There are others out there, mainly on Facebook transmission tuning pages, that will make promises they can't keep.

some people have burnt up multiple transmissions.
some people have just had very poor-performing transmissions, and lack of ability to use full throttle.
others get tired of revisions with no improvement.
some examples are listed in the video below

Wiring Info