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Old 27th February 2012, 06:04 PM   #10 (permalink)
David.Yu
David.Yu is adjusting to life without a GT-R...
GT-RDC Member
 
Join Date: Jun 2001
Location: Surrey, UK
Cars owned: R35 GT-R, BMW M135i 5 dr manual, 190hp Abarth 500 (wife's)
Posts: 5,040
Quote:
Originally Posted by Adamantium View Post
David,

I think the loss on dd rollers is calculated not measured. Ie. it's the same for all GTRs as the variables used to calculate it are the same. I don't believe they measure coastdown on the individual car.
Correct. I was going by the fact that my car made 404hp at the wheels on a DD, and we now know that was pretty close to a genuine 485 at the flywheel (since seeing engine dyno printouts at the factory).

Using the standard DD calculation for a 4WD car, standard CBA GT-Rs tend to produce a claimed, calculated 506/510hp, but I now believe that to be erroneous (but irrelevant because you should only ever use a RR to show differences, not absolute power figures anyway).
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