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it's not a chip. it doesn't change the rail pressure. it goes into each injector and alters injection timing, injection pulse width, pulse times and by doing this it can alter how the fuel gets into the engine. it also changes the boost. please note this is also with a 3" exhaust. if you look at their youtube channel you will see similar results across all the cars. I did my research before buying something. I didn't want to put something on my car that just alters rail pressure as it destroys the engines. take a look at the chip it chips. they know their chips will throw an engine light due to over fueling so they give you a bolt that goes into your fuel rail to block off the release valve so they can continue to get power out of new common rails with just changing rail pressure. i do not like that idea at all and as such the only 2 I came across on the market that actually worked with the injectors was Steinbeur and Diesel Smart. I could be wrong, their could be other companies that don't just change rail pressures but very few companies actually offer indication about how they get their power.
the module also comes with 4 tunes, economy, light tow, heavy tow and all out power... this dyno run was done in all out power obviously the car is not always in this tune and in fact most of the time I just leave it in the economy tune. I'm noticing that at 100k's an hour my car is reving about 500-700rpm less then what it use to so obviously that's gotta be helping my fuel economy. I haven't had a chance to test it properly but when I do i'll let you know how it goes
if you read the rest of the post you would see that because my car still has some factory warranty left by fitting their EGT defence system it moves the drivetrain warranty to them.