HP & Torque Thoughts

**AMPS** · 8th July 2004, 08:37

If you do any mods beyond, say, a can. Then it'll be almost mandatory to get a baseline dyno run so that the tuner knows where fiddling is needed.
Attaining the last nth of horsepower is not as important as getting a nice usable power curve. Taking out the noise/emission control dips in the curve, for example.
Lou

**wkid_one** · 8th July 2004, 20:29

Originally Posted by AMPS

If you do any mods beyond, say, a can. Then it'll be almost mandatory to get a baseline dyno run so that the tuner knows where fiddling is needed.
Attaining the last nth of horsepower is not as important as getting a nice usable power curve. Taking out the noise/emission control dips in the curve, for example.
Lou

Yeah I agree - much nicer to have a flat hp and torque curve than one that goes higher yet has peaks and troughs all over it.

Look at the latest thous - they all seem to have a stutter in the mid range which is wickedly pronounced........the price of total hp pursuit?

**bluninja** · 8th July 2004, 21:00

Originally Posted by wkid_one

Yeah I agree - much nicer to have a flat hp and torque curve than one that goes higher yet has peaks and troughs all over it.

Look at the latest thous - they all seem to have a stutter in the mid range which is wickedly pronounced........the price of total hp pursuit?

Hey WKID isn't the stutter at about 5K? All Euro bikes have a hole round about 5k to get them through the european noise tests, which you can then sort after you've bought the bike. If not I'm typing bollox as usual

**wkid_one** · 8th July 2004, 21:08

Originally Posted by bluninja

Hey WKID isn't the stutter at about 5K? All Euro bikes have a hole round about 5k to get them through the european noise tests, which you can then sort after you've bought the bike. If not I'm typing bollox as usual

Yep - check out the dynos of the new thous tho

**Penta** · 13th July 2004, 19:04

Originally Posted by Zed

Is it important to you to know exactly how powerful your motorcycle is? If you have it dynotuned and find out the performance does it change your attitude towards your bike & maybe even the way you ride it?

I've always been one to "feel" the power in my bike and know whether or not it is grunty, and I can't say that I've done much modifying over the years. Now that I am getting some mods done to my bike I am curious to know its stats, even though I won't be able to campare it to what it was like originally because I didn't ever have it dynoed. Stock standard these CBR's claim to put out:

CBR600F
Specifications

CBR600F - 200014 - E

Specifications CBR600F (ED-type)

Engine Liquid-cooled 4-stroke 16-valve DOHC inline-4

Bore ´ Stroke 67 ´ 42.5mm

Displacement 599cm3

Compression Ratio 12 : 1

Carburettors 36.5mm slanted flat-slide CV-type ´ 4

Max. Power Output

106PS/12,500rpm (95/1/EC) (78kW/12,500min-1)

110PS/12,500rpm (DIN) (81kW/12,500min-1)

Max. Torque

6.6kg-m/10,500rpm (95/1/EC) (65Nm/10,500min-1)

6.8kg-m/10,500rpm (DIN) (67Nm/10,500min-1)

Will be interesting to me to see my change in perspective about knowing exactly how powerful my bike is.

Zed

Yes, Zed they are all good things to know. The stats you are talking of you will learn lots from, and then you modify things, learn some more and make better changes which makes you bike do all kinds of cool things.

**Penta** · 13th July 2004, 19:06

Originally Posted by Zed

Is it important to you to know exactly how powerful your motorcycle is? If you have it dynotuned and find out the performance does it change your attitude towards your bike & maybe even the way you ride it?

I've always been one to "feel" the power in my bike and know whether or not it is grunty, and I can't say that I've done much modifying over the years. Now that I am getting some mods done to my bike I am curious to know its stats, even though I won't be able to campare it to what it was like originally because I didn't ever have it dynoed. Stock standard these CBR's claim to put out:

CBR600F
Specifications

CBR600F - 200014 - E

Specifications CBR600F (ED-type)

Engine Liquid-cooled 4-stroke 16-valve DOHC inline-4

Bore ´ Stroke 67 ´ 42.5mm

Displacement 599cm3

Compression Ratio 12 : 1

Carburettors 36.5mm slanted flat-slide CV-type ´ 4

Max. Power Output

106PS/12,500rpm (95/1/EC) (78kW/12,500min-1)

110PS/12,500rpm (DIN) (81kW/12,500min-1)

Max. Torque

6.6kg-m/10,500rpm (95/1/EC) (65Nm/10,500min-1)

6.8kg-m/10,500rpm (DIN) (67Nm/10,500min-1)

Will be interesting to me to see my change in perspective about knowing exactly how powerful my bike is.

Zed

Yes!! Zed they are all good things to know. The stats you are talking of you will learn lots from, and then you modify things, learn some more and make better changes which makes your bike do all kinds of cool things.

**Penta** · 13th July 2004, 19:13

Originally Posted by White trash

Nup. Not important to me. I couldn't give a rats arse.

I was still sticking in the slipstream of Gixxer 1Ks at Pukekohe a couple months ago and I'm pretty sure I've only got 2/3 their power.

WT ?? Are you for real!! Sounds like you are full of *&*@. Nothing worse than someone who thinks the're all that and arn't.

**FROSTY:Me** · 13th July 2004, 19:13

for certain Zed -you need to know the stock HP of YOURbike
Before you modify it --otherwise you have no idea if you have gained or lost.
Ill be dynoing my zxr once ive (hrumph) got the motor together.
But only to see if we can iron out the flat/dead area from 6-9.5 thou
If it dyno's up ok Im wondering if i have a low rpm overfuel problem.

**FROSTY:Me** · 13th July 2004, 19:17

Originally Posted by Penta

WT ?? Are you for real!! Sounds like you are full of *&*@. Nothing worse than someone who thinks the're all that and arn't.

Penta--If you were there--and clearly you weren't You would have seen the Trashman in action. I can vouch that he was having a huge battle with gsxr1000's and I think a GSXR750.
I had the best seat in the house-The seat of a bandit 600 as they warped past me.

**White trash** · 14th July 2004, 07:58

Originally Posted by Penta

WT ?? Are you for real!! Sounds like you are full of *&*@. Nothing worse than someone who thinks the're all that and arn't.

Penta I don't think I've had the pleasure of making your aquaintance? *extends hand*

Yes, I am full of shit as most of the posters here will attest to. However, in this instance, I remain mostly truthfull.

If you want a demo, get off your arse and come to Puke' on an open test day. I'm sure there's a 600 owner on here somewhere who'll let me rape their bike for a few laps in the interest of scientific testing.

Word of advice: Never question someones integrety/skill level having never met them or seen them ride.

**riffer** · 14th July 2004, 08:12

Originally Posted by White trash

I'm sure there's a 600 owner on here somewhere who'll let me rape their bike for a few laps in the interest of scientific testing.

Shit mate you would definitely keep up with them in the corners on the 250...

Abot time some of these blowhards who hassle WT come out and actually put their bike where their mouth is, I reckon.

**White trash** · 14th July 2004, 08:44

Originally Posted by celticno6

Shit mate you would definitely keep up with them in the corners on the 250...

Abot time some of these blowhards who hassle WT come out and actually put their bike where their mouth is, I reckon.

Nah, bring it on. Bit of friendly ribbing's all good.

I just prefer people who know me or have ridden with me to take the piss.

**Paul in NZ** · 14th July 2004, 09:40

Wadda bunch a wimps...

The crushing (and optomistic) 56 / 57 RWHP of the Mighty 850cc Guzzi propelling all that iron and blubber along will make mince meat of the lot of yas....

Yes.. Even the mighty Mk2 has been to the dyno. Its a very useful tool in the hands of a skilled operator who can diagnose all sorts of problems from looking at a graph. I've seen people find everything from a buggered chain to the usual ignition / fuel things. Dead clever some people.

Cheers

ps. 56/57 bhp at the rear wheel is actually pretty good for a largely un modded roundfin Guzzi. It picks up 3 to 4 bhp as mine has the rare ZD close ratio, straight cut gear box. (Whines like a banshee) The gutted run about pipes (it's a notto a noise, it'sa budeifull a music) and re jetting chime in one or 2 more as well...

pps All the HP in the world won't change a flywheel (light by Guzzi standards) that is so massive it has it's own gravity field. So the bike won't spool up like a modern 4 and engine braking is pretty well non existant but while I trail in the HP stakes, on the character dyno, my Mk2 is TOPS!

**White trash** · 14th July 2004, 10:48

Originally Posted by Paul in NZ

Wadda bunch a wimps...

The crushing (and optomistic) 56 / 57 RWHP of the Mighty 850cc Guzzi propelling all that iron and blubber along will make mince meat of the lot of yas....

Yes.. Even the mighty Mk2 has been to the dyno. Its a very useful tool in the hands of a skilled operator who can diagnose all sorts of problems from looking at a graph. I've seen people find everything from a buggered chain to the usual ignition / fuel things. Dead clever some people.

Cheers

ps. 56/57 bhp at the rear wheel is actually pretty good for a largely un modded roundfin Guzzi. It picks up 3 to 4 bhp as mine has the rare ZD close ratio, straight cut gear box. (Whines like a banshee) The gutted run about pipes (it's a notto a noise, it'sa budeifull a music) and re jetting chime in one or 2 more as well...

pps All the HP in the world won't change a flywheel (light by Guzzi standards) that is so massive it has it's own gravity field. So the bike won't spool up like a modern 4 and engine braking is pretty well non existant but while I trail in the HP stakes, on the character dyno, my Mk2 is TOPS!

One of my favourite bikes ever is a mate of my dads MKI, full Stuchi (?) fairing, lump of 6X4 as an excuse for a seat. Open megaphones....

Lovely!