Net power output
06-17-2011, 09:45 AM
#1
Thread Starter
Net power output
After lots and lots of discussion over the last year between myself an a AP1 owner, I decided to do some math to determine, do AP2s actually put out more power?
This is what was done:
Dyno logs (from a dynapack) were imported from the following cars:
AP2 (06) with a hondata flash (but otherwise stock) 230hp@8000RPM peak output, 8100 fuel cut
AP1 (03) with a J's racing 70RR and no tune. 216hp@8300 peak output, 8900 fuel cut.
Obviously the F22C has a higher peakout, but my argument was that while the F22C has a higher peak output, the AP1 has a wider powerband. His theory was that the power deficiency is such that the wider powerband isn't enough to compensate for the lower horsepower output.
The following graph was made factoring in gear multiplication. Additionally, the math happens to work out that a 4.57 Final Drive makes the AP1 gearing pretty close to stock AP2 gearing. The following assumptions are used: 255/40/17 rear tires (so that tires are not a variable); drivetrain loss isn't a factor in net output (because both cars are dynoed on the same dynapack).
Clearly, a higher redline would really benefit the AP2.
Please discuss without flaming.
This is what was done:
Dyno logs (from a dynapack) were imported from the following cars:
AP2 (06) with a hondata flash (but otherwise stock) 230hp@8000RPM peak output, 8100 fuel cut
AP1 (03) with a J's racing 70RR and no tune. 216hp@8300 peak output, 8900 fuel cut.
Obviously the F22C has a higher peakout, but my argument was that while the F22C has a higher peak output, the AP1 has a wider powerband. His theory was that the power deficiency is such that the wider powerband isn't enough to compensate for the lower horsepower output.
The following graph was made factoring in gear multiplication. Additionally, the math happens to work out that a 4.57 Final Drive makes the AP1 gearing pretty close to stock AP2 gearing. The following assumptions are used: 255/40/17 rear tires (so that tires are not a variable); drivetrain loss isn't a factor in net output (because both cars are dynoed on the same dynapack).
Clearly, a higher redline would really benefit the AP2.
Please discuss without flaming.
06-17-2011, 09:57 AM
#3
Mike, you posted this topic hoping for a flame session! 
In all seriousness, this is a good analysis using math equations and validated data to output this graph. The CR seems to output more power with a headerback + tune...well at least it'll offset the drag penalty from the factory.
In all seriousness, this is a good analysis using math equations and validated data to output this graph. The CR seems to output more power with a headerback + tune...well at least it'll offset the drag penalty from the factory.
Thread
Thread Starter
Forum
Replies
Last Post
jdmjeff
S2000 Modifications and Parts
5
03-23-2009 10:07 AM