Quote:
Originally Posted by Midgear
they dont make the powertuner anymore?
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That's correct. DHP is the company name. More specifically it's a network consisting of the developer and designer /programmer (Charles Beyerch) and a network of key product support personnel that assist with programming and customer service.
It shut down new production as of last year, and now only offers limited product support to current customers for the PowrTuner. The owner was actually producing these as a side job, and was getting understandably burned out keeping up with all the new programming requests and developing new software versions, while trying to maintain his real life.
DHP produced two products. Reprogrammed PCM's (REPLACES your car's computer) which provides pre-set changes to your car's factory settings, and the DHP PowrTuner which allows the home user to reprogram their own PCM as many times as they want using a laptop and a motorola-based chipset interface.
I'd be willing to bet the "chip" you speak of is probably a device that simply changes the voltage signal sent from the Intake Air Temperature (IAT) sensor that tells the computer the IAT is colder than it actually is, causing the computer to think it needs more fuel to make a correct mixture for the sensed temperature (since it thinks there's a higher oxygen density with colder air).
This will give a very mild feeling of a little extra power, but is not really good for your engine, since the data it is processing is based on lies getting input from the sensors. Over time, the excess fuel will foul your plugs, gum up your internals with carbon, foul your O2 sensor, and clog your catalytic converter due to an actual rich condition being induced.
DHP PCM = Good (but requires 91 or higher octane with no exception, due to timing advances. Lower octane such as 89 will cause detonation and that's very bad.)
"ECU chip" = Bad for the reasons I explained above.
Good luck.