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Does no one let there shit break in anymore?
I've been involved with a lot of motorsports racing and even hold records to date in land speed racing. And through all this you never see someone base horsepower numbers on what the engine does just after assembly. I don't mind the fact that people have gone straight to the dyno without completeing a proper break in procedure, hell its their engine and it tells me later how much power was missing prior to the break in. I could go on for hours about why a break in is important and how everything "breaks in" but I'm afraid it would fall on def ears. I've see everyone pissed off though the years when a manufacture say that a car is going to produce X horsepower but when it is finally released making 5hp less the public responds with pitch forks looking for blood. well I hate to inform everyone that it is not uncommen to loose up to 5% of the potential horsepower do to improper car care while the vehicle is going through its most delicate time ever.
Moral of the story don't base the horsepower number on anything that you don't know was properly broken in. and remember that DYNO packs or hub dynos will show a slightly more favorable number than a wheel dyno.
By the way read your owners manual it tells you how to break in you car.
Below 4k RPM for the first 1000miles and no hard acceleration or braking. and don't cruise at one constant speed. If you have not lived by this than don't expect that engine, transmission and differential to be as efficient as it might be if it were done correctly.
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