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NA Crossfire Modding: In depth
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Oct 2, 2009 | 12:21 AM
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TVT_DESIGN
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Re: NA Crossfire Modding: In depth
FUELING
The stock M112 motor in the Crossfire is aimed at being a jack of all trades, master of none type of engine. It went in everything from a sports car to a SUV. To keep emissions at a minimum MB decided to keep the car at a fairly lean AFR. The stock injectors are a paltry 15 lbs/hr and on a bone stock motor are running at 80% duty cycle at WOT. This limits HP potential, but also makes for a good compromise of low end torque, low emissions, and decent MPG. Once you start ingesting more air into the engine the stock injectors quickly become inadequate.
Our goal is to increase the amount of fuel able to be added to the mix, thus allowing us a larger window for timing advance. More fuel + More Air + More Timing = More Power!
430/500 M113 Fuel Injectors: PN: A1130780249; These injectors are rated at 19 lbs/hr and are a great upgrade for a bolt on car. When coupled with the above bolt on intake mods and an aggressive tune, you can see anywhere from 260-275 HP at the crank. All the while maintaining OEM reliability, very good MPG, and low emissions.
C43/C55 M113 Fuel Injectors: PN: A1130780023; These monsters flow 21 lbs/hr and are perfect for a highly modified crossfire running headers, larger exhaust, cams, and head work. These injectors will support upwards of 375 HP.
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