Interesting Comparisons
Here are some more dyno charts and comparisons that you might find interesting.
A comparo, just for fun...
Performance Concepts 405 - vs. - Factory Kitted ZXR 400 SP:
Our 2006 450 Production Championship engine.
How about another one?
Performance Concepts 441 - vs. - Factory Kitted ZXR 400 SP:
Our 2004 450 Superbike Championship engine.
Will you be having the meal?... Or do you prefer that ala carte?
Top End Service - vs. - Cylinder Head Only: A good example of how selected top end work can
free up some additional HP from an already worked cylinder head. So how hungry are you?
Would you rather be smart, small and fast -or- just big?
Development - vs. - Displacement: Illustrating what's possible with a proper development
program. This a 180 cc displacement difference we're talking about.
Everyone knows the earth is flat, you'll sail off the edge... your doomed!
Lowered Compression - vs. - Raised Compression: Higher compression ratios is not always the
answer. Every engine and application is different. Some situations require an alternate perspective and approach to
acheive certain goals.
Well, that was just a fluke, try that again... I dare you!
Uh... we have, take a look at the compression ratios of the majority of our builds. Again we're NOT saying that raising
compression isn't beneficial at times - we are not contesting that. What we ARE saying is, every scenario is different
and we build accordingly - for the application and customer needs.
Dynamometers
Different brands of dynamometers (Dynojet, Dynostar, Factory, Land & Sea, Mustang, Superflow, etc.)
and types (eddy current or inertia) measure and/or calculate power differently. This can make for
widly different readings from one to another. There are even variations in the readings between two
test facilities that both use the same brand and model. No doubt, context is everything - if you're
not comparing two figures being derived from the same dyno and facility - that comparison will have
little meaning.
Horsepower Figures
In addition to horsepower figures, we list power increases represented as a percentage.
We feel the percentage increase value is the more relevant figure in examining power
gains, than the hp number itself. At least until there is a truly a universal standard
by which all dyno manufacturers can agree to measure power.
Regardless of dynamometer brand, model, type or the hp figures they provide - they're simply a
reference and tuning tool. What we're looking for, is the difference between the baseline power
before the work and the power increases after the work. Ultimately, this all that really matters
whether referring to the scale (%) of increase or the hp increase number itself.
Testing
We do our testing on both eddy current and intertia systems at various facilities -
this is why we note the dyno brand, model and test location at the bottom
of each dyno results page. This is to give you a frame of reference, keep in mind
you cannot compare dyno results between two different facilities. Even if they use
the same dyno and software - there will be significant differences.
While we would like to do all testing on the same dyno/facility... It's just not realistic.
This can be due scheduling and time contraints, but it mostly about customer preference. For whatever reason, if our customers feel more comfortable with using one
dyno/facility over another - that's what we'll do.
Preference
Without getting into the dyno brand/type debate... Simply and when possible, we prefer to test on
Factory eddy current systems for consistency in repeatability and ease of tuning. Eddy current
systems typically read much lower than inertia systems (most Dynojets). However, we could really care
less about the number itself. Again, what were looking for is the difference between the baseline
power before the work and the power increases after the work.
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