Dyno result disappointing
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Other than bragging rights, in the end, horsepower is just a number.
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There are so many factors that can affect the dyno readings, not to mention the equipment and operator - ambient conditions, amount of heat soak, amount of airflow on the intercooler, just to name a few.
I believe the most important comment you made is "car feels faster" - I am sure your 0 - 60 time has been improved.
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Other than bragging rights, in the end, horsepower is just a number.
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During the time I was writing big checks to my engine builder, I saw Chris Harris interview Nick Swift on CarChannel. He asked Nick what kind of horsepower was he getting from his motors. Nick said he typically gets around 120 hp. I remember thinking, that's for ME!
"Amazing," said Chris. "How long do the engines last?" Nick said, 8 to 10 hours. Okay… so, I ended up with a 1380 A-series w/ 72 hp at the rear wheels. I've made it well past the 10 hour mark, so I guess I made the right decision—although it wasn't exactly my decision. With liberal application of the standard correction factors (drivetrain loss, 3500' elevation, 103°F ambient temp, full moon, etc.), I claim 89 hp at the rear wheels. Other than bragging rights, in the end, horsepower is just a number.
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If the boost is pretty much the same, then the supporting items can increase power to some extent, but not to a vast degree. The comparison of your turbo boost pressure figures before and after mods may tell you why you're seeing the power increases you are.
If you, say, doubled your boost and this is what you got, then you've got to look at your tuning.
If the new turbo is much bigger and can deliver much more air per pound of boost pressure, then you have to figure out how much extra air the new turbo can deliver per pound of boost compared to the previous one.
Once you know how much extra air should be going into your engine (in theory) then you have an expectation for what the combo could be delivering. If it falls way short, then you can start figuring out what supporting items aren't getting it done in keeping up with the increased air delivery.
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Thanks for your post, I appreciate it.....dynos are new to me.
i suspect the Mini “official” hp rating is engine hp.
i had the car dynoed(?) with just the M7 intake, Akrapovic downpipe and Quicksilver exhaust and had a hp rating of 139. So I have gained from that earlier reading.
The Generous adjustment I made was a googled suggestion of the loss between engine and dyno.
any further advice, suggestions and info are gratefully received.
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Okay, so a 2013 Mini Cooper S hp is rated by Mini as 181 hp.
I have modified my engine, etc considerably with the following additions:
M7 air intake
Akrapovic downpipe
Quicksilver exhaust system
Mini Mania Turbo K03 42 mm Quick Spool Turbo
Madness Mini ECU tune
Wagner intercooler
blowoff valve kit
oil catch can
the best dyno reading I get is 169 hp.
Adjusting this reading by a generous 20% it reads as 211hp.
car feels faster but why the lower reading regarding hp output? Should I expect more?
what am I missing?