The thing I can't get my head around is I had my car on the rollers just before Christmas and on the first run it made 281.4 at the wheels and 377.9 at the fly....the second run it made 301.8 @ wheels and 377.4 @ fly .......so my question is how does the roller's at APT allow for less transmission losses when everything in the drive train warms up, like it would do after the first run?......oh and the other thing is my tyres were left at the same pressure I drive on the road, which would also add more drag?
Martyn
BigPower dyno day Feb 3rd 2008
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Christian and Beccy
- Posts: 344
- Joined: Thu Oct 05, 2006 10:52 pm
- Location: Norwich
You asked Gary to turn the boost down for the initial run? He did exactly as asked and the car was missfiring on that run, so of course it wasn't run any higher. :? :?:V8_EATR wrote:Interesting :-k My graph shows 1.1 bar but I easily run 1.4-1.5 in high boost on the road. That is a big power difference from rollers onto grip.
I cast my estimation as to what power I thought that car would make without the missfire and with the rest of the boost.
No, I totally understand. I was just trying to find where it actually said boost pressure on the dyno sheets :oops: I guess I had thought the run was high boost.Christian and Beccy wrote:You asked Gary to turn the boost down for the initial run? He did exactly as asked and the car was missfiring on that run, so of course it wasn't run any higher. :? :?:V8_EATR wrote:Interesting :-k My graph shows 1.1 bar but I easily run 1.4-1.5 in high boost on the road. That is a big power difference from rollers onto grip.
I cast my estimation as to what power I thought that car would make without the missfire and with the rest of the boost.