25-12-2012, 08:18 AM
There is everything wrong with chip boxes, I have seen more than one person have to replace some seriously expensive bits of fuel system thanks to a chip box and one who actually grenaded their engine with it. Admittedly that was after 4 years fitted, but still, anything that does that much damage should never be sold to/by people who don't understand it.
You're right about it's function though, Tom, the resistor convinces the ECU to allow the rail pressure to rise beyond it's normal running pressures. This gives higher rail pressure and more flow, which obviously allows more power. The issue is the extra strain this causes on your fuel system, parts will wear out a lot faster and a brief browse in this section will show you how expensive that can be. Spend your money on a proper remap and don't mess with this crap, it belongs in the same category as electric superchargers and the like.
You're right about it's function though, Tom, the resistor convinces the ECU to allow the rail pressure to rise beyond it's normal running pressures. This gives higher rail pressure and more flow, which obviously allows more power. The issue is the extra strain this causes on your fuel system, parts will wear out a lot faster and a brief browse in this section will show you how expensive that can be. Spend your money on a proper remap and don't mess with this crap, it belongs in the same category as electric superchargers and the like.