Adventures In Dyno Testing

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http://www.stangnet.com/tech/lee50guru/dense_tech.html

:cliffs:
1. guy dynos his brand new mustang gt(?) and gets a 222hp baseline
2. he adds iridium plugs, and an aftermarket intake and gains a few hp.
3. after 3 days, he feels as if his car has somehow "woken up" and wants to dyno again, expecting a noticeable increase in hp.
4. he dynos it again a few days later finds that it actually lost about 20hp!?!
5. he shrugs it off and continues adding and dynoing more mods.

can it be that the car's computer adjusts to the mods in a negative way? :hmm:
 
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