CBR600RR dyno

[Jeff Spencer]

Hey guys,

Our team is just starting to design our car for the 2010 competition. We have decided to go with an engine from the CBR600RR. We were wondering what horsepower this engine will make with the 20 mm restrictor and at what rpm this will occur.

Thanks

[Jeff Spencer]

Hey guys,

Our team is just starting to design our car for the 2010 competition. We have decided to go with an engine from the CBR600RR. We were wondering what horsepower this engine will make with the 20 mm restrictor and at what rpm this will occur.

Thanks

[Math ze engineer]

If the engine isn't well tuned you will have around 50-60 hp at 11000-12000rpm. You can easily get it to 80hp. Some team claim to push it to 100hp (I guess you need new camshafts, variable length runners or turbo and alot of dyno testing). Just consider that the restrictor will choke the engine around 11 000 rpm. We run a CBR600RR and it is very hard to tune. It is very sensitive to octane so be sure you run the same gasoline as in competition. Here in quebec we have 87 89 91 octane and some places have 94. Competition fuel was 93 and 100 octane and we noticed the engine didn't run very well (pink). We use performance electronics ECU. They supplied us a trigger wheel that doesn't fit the crankshaft so we use the original one and removed a teeth. Everything is fitted per PE specs and we still need 45 degree spark advance to have it run well so be careful if you use it.

[Dsenechal]

Our calculations and intake were designed around 10500 RPM. I wanna say it dyno'd at 79 hp but that seemed a little high

[kapps]

We didn't run a RR, just an F4i. We're NA and made 80 hp. I'm not sure how much the additions Honda made to the RR will really help in the restricted environment. Remember calculations will only get you so far on runner lengths. Making it adjustable and testing on the dyno is really the only way to be sure.

[AdamL]

our RR04 is running around 70 hp, occuring around 11,500 rpm.

We concentrated more on the delivery of the power, rather than a particular peak figure. The restrictor can cause an undriveable peak and trough in power delivery through the mid-range.

[horia]

We want to use the original trigger wheel of the engine by cutting one tooth. But which one to cut? Does it have a hall effevt sensor? we are using the Honda CBR 600 RR 2004.Thank you

[Erich Ohlde]

the rule of thumb for missing tooth trigger wheels is you want the first EDGE past the missing tooth to be TDC on the #1 cylinder. technically it doesn't really matter as long as you verify ignition timing with a timing light.

[horia]

Ok, so where is the next missing tooth?

[Math ze engineer]

It depends on what kind of ECU you use. If you use the Performance Electronics ECU just read the instruction it will tell you how to place the trigger wheel at cylinder #1 TDC. Then you just cut the tooth to follow this rule. We had some trouble with this because we first cut off the wrong tooth and we had to rebuild it. The strange thing is that we need like 30 to 40 degree of advance on ignition to have the engine run. The coolant often gets over 100°C. Maybe it's too lean when loaded.

[horia]

Weare using a Walbro Ecu and we need a flywheel with n-2 teeth. Is it possible to modify the original flywheel that has 12 teeth?