Rb25 Dyno Results

[yorosaki]

Hello,

I just got a R33 gts-t, and took it to the dyno to get a baseline. The car is completely stock but on the graph I'm getting some heavy dips/rises, could anyone shed some light on the cause?

Thanks.

[V8skylineMAN]

at a guess i would say you have a bigger turbo fitted, the power seems to come on quite suddenly. another reason for this odd curve could be an in experienced dyno operator. holding the throttle at half until 4300 rpm then flooring it would give a similar torque curve.

[Lithium]

It appears the software only shows the area of the graph the power and torque curves actually hit - so instead of starting at 0 and going up to the most torque you'd make, it starts at "106". The result of this is that you are zoomed in as much as possible to your power and torque curves without losing any data, so what would appear to just be little wiggles in the curve have been magnified up to be huge sharp jolts.

If you got Excel and plotted the points on the graph into a spreadsheet and then made a 0 based graph off it you'd probably find it APPEARS a lot smoother. Dynapack dyno software does the same thing, and whenever I have posted a graph people have questioned the tuning because of the bumps they can see - but its actually because the dyno software is set up to give you as much usual information as possible

[yorosaki]

The person that ran the dyno auto-sized on the graph causing it not to start at 0, which I'll have to remind him not to do next time! It was a Mustang AWD dyno. I'm actually a bit curious as to why the power went down between 3000 to 4300 rpm, if it was at half throttle shouldn't the curve be somewhat flag until the operator floors it at 4300?