H&S MOTORSPORTS 11-14 GM 6.6L Dual High Pressure Fuel Kit W/O CP3
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H&S Motorsports is pleased to introduce the Dual High Pressure Fuel Kit for the 2011-2014 6.6L GM Duramax. This kit has been in development since June 2012 and is finally available to the public after over 11 months of testing and refinement. The diesel industry has been longing for this modification ever since the release of the LML/LGH platform and now the wait is over.
Our friends over at H&S Performance have been testing this kit on their 2011 Denali HD for over 6 months. This is the same truck that made 1086 horsepower and 1911 ft/lb of torque on a Mustang 1100SE dyno during the "Breaking Point 2" live feed in which they intentionally set out to find the limits (or breaking point) of the factory LML bottom end. Prior to the "Breaking Point 2" event, the truck was driven regularly by not only the engineers at H&S Performance, but also the members of the race team. Needless to say, they were (and still are) impressed with the ability of the kit to maintain rail pressure, even in the most demanding conditions.
Just as a quick reference for you diesel nuts out there, the engineers at H&S Performance were able to run 3800us (not recommended) of main injection duration on stock injectors without a drop in rail pressure. So what does that mean? Well, think about it this way; their off-the-shelf HOT tune commands around 1400us and is on the verge of draining the rail on a stock CP4-equipped truck. At 3800us, that is a 270% increase in fuel demand from their HOT tune and limit of the stock CP4. The H&S Motorsports Dual High Pressure Fuel Kit was able to maintain the commanded 29,000 PSI rail pressure without skipping a beat.
If you are looking for the ultimate in high pressure fuel supply, look no further than the H&S Motorsports Dual High Pressure Fuel system.
Nothing is necessarily WRONG with it, but the factory CP4 fuel pump by itself is only capable of providing enough fuel to safely produce around a maximum of 480-500 horsepower. Once your power goals exceed that 480-500 HP range, more fuel is an absolute requirement. Assuming your factory CP4 pump is in good condition, this kit is easily capable of producing 900+ HP worth of high pressure fuel supply.
The CP3 pump we include with the kit is a brand new OEM unit from Bosch. That's right, BRAND NEW, not a remanufactured unit like many shops include. The key to ensuring the longevity of any high pressure fuel pump is by providing the high pressure fuel system with clean, waterless diesel fuel. Any fuel contamination that reaches the high pressure fuel system can be detrimental to reliability and performance. We highly recommend using AirDog or similar lift pump for proper filtration and water-separation.
There are a few reasons we chose the CP3 over the CP4: