Have you installed new injectors to upgrade the power of your MACK E7 engine only to find the power gain disappointing for the cost and effort? This is not an uncommon complaint we hear but the good news is we have the solution! Increasing the nozzle size of the injector is a good thing  when you are looking to increase power BUT it does not solve the root issue of the MACK low power drive ability. The main issue lies in the fuel scheduling that the factory utilizes. Like most every other diesel engine there are a few tables that calculate fuel scheduling. Primarily it uses BOOST PRESSURE, ENGINE RPM and CALCULATED LOAD. The way MACK set these up is that they rely on exhaust volume to spool the charger where most other manufacturers tend to use the thermal content of the exhaust gas to help spool the charger sooner and this method gives them more LOW END POWER, wider power band, better throttle response and all around better driving experience. This is the reason MACK truck seem to have such a narrow power band and can be corrected by custom ecu tuning! You will need to remove the ECU form the side of the engine and ship it in to our location for this tuning service. If you use standard next day air with UPS or FedEx we receive those by around 10:30am and can generally get them tuned and back out for shipping the SAME DAY!

Combine the Rochester Diesel Nozzles with one of our Billet Wheel 75mm Performance Turbocharger and you can get up to 625hp reliably! - See below for details

Please give us a call at 423-709-7755 or email questions to [email protected]