Dyno run - 2007 GSX-R 1000
I was kind of curious if all the aftermarket parts help with the horsepower on your bike, so I decided to dyno it… well it also didn’t cost me anything .
First I’ll tell you what I have on my bike. I do not have any engine work or anything done to the bike. Just the common stuff.
- Graves titanium slip-on exhaust. This exhaust gets rid of the stock catalytic converter and the dual pipe setup.
- BMC “race” air filter
- Power commander
This is the most common stuff people put on their street bike… exhaust, power commander and maybe an air filter.
So what do you think happened?
First dyno run showed……. drum roll…. 154 horsepower… . This is with a map I downloaded from the Dynojet’s website.
So, we started trying to “optimize” the map… at the end we got just 2 more HP - 156.
What is the point of this post you ask… well, the bone stock 2007 Suzuki GSX-R 1000 bike, dynoed on the same dyno produced…. 158 HP. Yeah it was a “magazine” bike - the ones Suzuki gives to magazines for reviews, so they are a little better, but it shouldn’t be too much off from a regular stock bike you buy at the dealer.
The good news is:
- The bike is lighter after removing that 40 lbs catalytic and stock exhaust (I don’t know the exact weight, but it was heavy)
- The power curve is smoother - no dips. The stock dyno run showed a dip at about 5K RPM. The power commander fixed that.
- The bike looks and sounds “better”
Some other interesting things…
- When we tried to make the fuel mixture more rich - the horsepower went down. So leaner did it up to a point at high RPMs, but too lean doesn’t work either of course.
- Talking to some people, I was told that changing the exhaust to a Yoshimura might help.
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Tuesday, November 20, 2007
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