Comparing 600cc dyno numbers

[blazing_nitro]

I thought other's might be interested as I was comparing dyno's of other 600cc super sports and found some interesting information. I hope to test ride a 600 super sport next year as an upgrade.

@ 5,000 RPM

FZ6R = 34 hp
gsxr=34 hp
600RR = 32 hp
zx6r = 30 ha
R6= 28 hp

@ 6,000 RPM

FZ6R = 40 hp
gsxr= 40 hp
600RR = 36 hp
zx6r = 36 hp
R6= 36 hp

@ 7,000 RPM

FZ6R = 51 hp
gsxr= 48 hp
600RR = 48 hp
zx6r = 47 hp
R6= 42 hp

@ 8,000 RPM

FZ6R = 62 hp
gsxr= 61 hp
600RR = 61 hp
zx6r = 61 hp
R6= 51 hp

@ 9,000 RPM

FZ6R = 69 hp
gsxr= 75 hp
600RR = 75 hp
zx6r = 71 hp
R6= 60 hp

I don't know about most of you but I don't think I see or keep the bike past 9,000 except for say flat out accellerating. I think I'm usually in the 7000-8000 range in the few twisty roads we have.

It's also interesting why the fz6r drops so much in the higher rpm's. Shouldn't it also go up. Are there any restrictions to the fuel or air system to cause this.

If someone else wants to compare or review the numbers it would be great.

Here's my references

http://www.twobros.com/Cust_Service/Dyno_Charts/2009_yam_fz6r_FULL_dyno.pdf
http://www.twobros.com/Cust_Service/Dyno_Charts/dyno_2008_yamaha_r6_FULL_JB_new.pdf
http://www.twobros.com/Cust_Service/Dyno_Charts/Suz_GSX-R600-2001_SO_Dyno.pdf
http://www.twobros.com/Cust_Service/Dyno_Charts/2009_hon_CBR600RR_SO_dyno.pdf
http://www.twobros.com/Cust_Service/Dyno_Charts/09_Kaw_ZX-6R_4-2-1_FULL_dyno.pdf

 

[stuna]

well i will tell you my boys fz6 will eat my 6r , some days i wish i had one , but then i may get in trouble

 

[Marthy]

Cams profile is what dictate your engine characteristics, then you build or design your engine around this. I won't say the 6R is detune... it's just tune differently with less peak HP and a flat torque curve.

So the main reason why a R6 has more power than a 6R is simple. More aggressive cams profile (lift and duration)= better breathing at hight rpm, less torque at low rpm. An engine is a big air pump, nothing else! There's 2 way to make more power. Bigger engine (cc) or higher rpm, either ways you are using more air in the same amount of time.

 

[Marthy]

well i will tell you my boys fz6 will eat my 6r , some days i wish i had one , but then i may get in trouble

That's what I had in mind a FZ6. But I lost my job just about when I wanted to buy one. The following year everything was back on track... no FZ6 on the floor. Don't get me wrong... I like my 6R and unless I hit the lottery I will be riding her for a while. She got enough of good qualities to keep me happy. But there's days that I will enjoy the few extra ponies... the under-tail exhaust is kind of sexy also...

 

[UselessPickles]

You can't learn much just by comparing HP at various RPMs between bikes. Each bike has a different RPM range, is geared differently, etc. For example, at 40mph in 2nd gear, each bike will be at a different RPM. To compare how different bikes accelerate, you actually have to calculate how fast each bike accelerates at various speeds, taking into consideration it's torque curve, gear ratios, weight and aerodynamics.

Also, you can't just decide without riding a bike that "I'd never go above 9k RPMs anyway", because the higher RPMs on other bikes is not just "more" in addition to a bike with a lower max RPM. It's simply a different kind of engine that is designed with a larger RPM range, and the gear ratios will likely be quite different. If you want to generalize, you could probably get away with speaking in terms of a percentage of the total RPM range. For example, comfortable cruising RPMs on inline 4-cylinder sportbikes generally seem to be in the 30%-45% range of max RPM.

I already have data for a couple of the bikes you mentioned (although the CBR is pretty old data, so the newer ones could be significantly different), so this will give you an idea of how drastically different the performance is between the FZ6R and 600cc super-sport bikes:

 

[blazing_nitro]

Everyone knows that a 600 supersport has faster acceleration than the fz6r by a huge margin. I also hear that they don't have much low end. Does that mean if you don't go above 9,000 will it still kill. I don't know and I don't presume to. Let's not kid ourselves a high rpm supersport is a rocket.

 

[blazing_nitro]

Cams profile is what dictate your engine characteristics, then you build or design your engine around this. I won't say the 6R is detune... it's just tune differently with less peak HP and a flat torque curve.

So the main reason why a R6 has more power than a 6R is simple. More aggressive cams profile (lift and duration)= better breathing at hight rpm, less torque at low rpm. An engine is a big air pump, nothing else! There's 2 way to make more power. Bigger engine (cc) or higher rpm, either ways you are using more air in the same amount of time.

Two ways to make more power in this case doesn't work with higher rpm it gets worse. Anybody know if torque goes down too as that might be an indication.

 

[blazing_nitro]

Hey we got them off the line in the 0-30 range

Maybe half way across the intersection.

[/QUOTE]

 

[UselessPickles]

Two ways to make more power in this case doesn't work with higher rpm it gets worse. Anybody know if torque goes down too as that might be an indication.

He meant that designing an engine to make the same torque, but at higher RPMs, was one way to make more HP.

HP = TQ * RPM / 5252

So if you see the HP dropping on a dyno chart, the TQ is dropping a lot at that point. Torque and HP are tied together, but torque is actually the more tangible of the two values. The torque is what directly translates to acceleration.

 

[Marthy]

He meant that designing an engine to make the same torque, but at higher RPMs, was one way to make more HP.

HP = TQ * RPM / 5252

So if you see the HP dropping on a dyno chart, the TQ is dropping a lot at that point. Torque and HP are tied together, but torque is actually the more tangible of the two values. The torque is what directly translates to acceleration.

The only thing you measure on a dyno is torque. HP is torque in relation with speed (rpm) Now you understand why Torque/HP graph always intersect each other at 5252 RPM. THe Dyno measure torque and calculate HP.:iconbeer: