What does 2-3Hp increase actually mean?

[mr grumpy]

been reading up a few Hp related webbys and tot of asking bros and sis here if they know? in terms of speed, torque or anything to explain this... thks in advance:cool:

[Constructicon]

Well, most of us when we see a bike, the easiest way to 'tag' it is by referring to the horsepower it makes. 40 bhp, 120bhp, 150 bhp...etc.

 

So when a product that says 'increase on 5 horsepower', it seems a great deal.

 

But say a sportsbike that makes 150horsepower. But if that 150 horsepower actually comes into play at above 150km/hr or around 10, 000rpm, and you spend 99% of your riding time at 100km/hr and at 4000 rpm, you are actually making use of a fraction of the bike's power.

 

If you change this exhaust, replace that air filter, add in fuel additives when there is a claim of '2-3' increment in horsepower, its going to be a waste of $$$.

And probably most of that increment resides in the top corner of the bike's power band at 10,000rpm which we rarely ever visit.

Most of us road riders dont really use even half of the bike's potential.

 

The $$$ spent on these usually pointless items is better spent on things like a good tyre and better brake pads. Things that makes a difference to us every time we ride the bike.

[rezz_shaz]

sometimes we change exhaust just to look fierce only.....

[stsoh]

wat is horsepower???

do a google search it comes out with horsepower = force(torque) X time.

it's the amount of work in certain time set.

 

basically if u ride a big bike 2~3 hp is not worth the trouble or should i say worthless.

just like wat constructicon mentioned most riders dun use the potential of the bike.

 

unless u r riding 125cc than 2~3 hp is about 20~30% more coz 125cc 4-stroker produce ard 9~11 hp.

most of the time, all 125cc riders use it's max potential power.

doing simple carb tuning, by changing settings like main-jet, slow-jet n jet-needle clip height location can increase the hp by 2~3 hp.

 

even though with improved hp, top speed maintain the same.

wat it's means is ur 125cc can do 110kph, after having extra 2~3hp top speed is still 110kph.

but if u do a run timing, b4 n after the improvements, there will be some different.

wat i mean is b4, u might be doing 20 seconds to reach 110kph.

after having improve 2~3 hp, u might be doing 15 seconds to reach 110kph.

tat's wat having more horsepower can do, the amount of work done.

like more strength with the extra power, can work or run faster with 20~30% more power.

Edited July 5, 2010 by stsoh

[Pandoras Kitten 3]

Torque is rather more important in everyday commuting. 125Z being a typical 2 stroke has great horsepower but little torque, and suffers every time it goes uphill or needs pickup quick, except within a very small range of revs.

 

Phantom has average HP but there is enough torque to ride at insanely low revs if you wanted to, or cruise efficiently at 90 without losing momentum over hills, etc. No need to change gear to overtake - whack the throttle at any lower revs and instantly, acceleration appears. That's torque.

[white_angel]

it actually means your bike just gave birth to "ponies"

H.P ~ Horse Power.

If you look closely down the inside of your engine...

I know I can see quite a number of "ponies" inside mine =)

[Pandoras Kitten 3]

Especially the ArRekZek being a 2-stroke, more room for horses to stay as the piston has an extra port in it, no camshaft, etc

 

But anyway - want more horsepower? Get a 2 stroke or sportsbike. Modifications usually aren't worth it in the long run!

 

And don't buy products that claim a 10% horsepower increase. Not even K&N air filters. The caveat is that you have to know what a hi flow filter does to your engine, then tune the carb and other things to match!

 

No free lunch, gentlemen.

[jyo]

wat is horsepower???

do a google search it comes out with horsepower = force(torque) X time.

it's the amount of work in certain time set.

 

basically if u ride a big bike 2~3 hp is not worth the trouble or should i say worthless.

just like wat constructicon mentioned most riders dun use the potential of the bike.

 

unless u r riding 125cc than 2~3 hp is about 20~30% more coz 125cc 4-stroker produce ard 9~11 hp.

most of the time, all 125cc riders use it's max potential power.

doing simple carb tuning, by changing settings like main-jet, slow-jet n jet-needle clip height location can increase the hp by 2~3 hp.

 

even though with improved hp, top speed maintain the same.

wat it's means is ur 125cc can do 110kph, after having extra 2~3hp top speed is still 110kph.

but if u do a run timing, b4 n after the improvements, there will be some different.

wat i mean is b4, u might be doing 20 seconds to reach 110kph.

after having improve 2~3 hp, u might be doing 15 seconds to reach 110kph.

tat's wat having more horsepower can do, the amount of work done.

like more strength with the extra power, can work or run faster with 20~30% more power.

 

 

Hi .. very interesting information ! i am riding a 125cc motard, electronic fuel injection. can i still boost my pick up speed or acceleration ? I have check on my sprocket ratio.. no point, cos it will affect my top end speed ( which is alraedy slow! )

What other ways can i help ? Thanks for enlightening !!

 

Regards..

[jyo]

Well, most of us when we see a bike, the easiest way to 'tag' it is by referring to the horsepower it makes. 40 bhp, 120bhp, 150 bhp...etc.

 

So when a product that says 'increase on 5 horsepower', it seems a great deal.

 

But say a sportsbike that makes 150horsepower. But if that 150 horsepower actually comes into play at above 150km/hr or around 10, 000rpm, and you spend 99% of your riding time at 100km/hr and at 4000 rpm, you are actually making use of a fraction of the bike's power.

 

If you change this exhaust, replace that air filter, add in fuel additives when there is a claim of '2-3' increment in horsepower, its going to be a waste of $$$.

And probably most of that increment resides in the top corner of the bike's power band at 10,000rpm which we rarely ever visit.

Most of us road riders dont really use even half of the bike's potential.

 

The $$$ spent on these usually pointless items is better spent on things like a good tyre and better brake pads. Things that makes a difference to us every time we ride the bike.

 

very interesting thread ..

[stsoh]

Hi .. very interesting information ! i am riding a 125cc motard, electronic fuel injection. can i still boost my pick up speed or acceleration ? I have check on my sprocket ratio.. no point, cos it will affect my top end speed ( which is alraedy slow! )

What other ways can i help ? Thanks for enlightening !!

 

Regards..

 

from wat i know is all factory EFI fuel map r set to lean.

currently there aren't any electronic devices for small bike to remap EFI.

for big bikes, there r devices like dyno-jet, power commander 3 or V to remap fuel for performance improvements.

the only way is if u can find a electronic device to remap fuel settings for your bike model.

others like using high flow air-filter or exhaust system r totally pointless n waste of money.

[Pandoras Kitten 3]

Hi .. very interesting information ! i am riding a 125cc motard, electronic fuel injection. can i still boost my pick up speed or acceleration ? I have check on my sprocket ratio.. no point, cos it will affect my top end speed ( which is alraedy slow! )

What other ways can i help ? Thanks for enlightening !!

 

Regards..

 

That's why I got an ancient carburetted bike. DIY everything

 

You can still help your acceleration by

1. Losing weight - strip down all unnecessary parts and fittings whist remaining road legal. Carry no boxes

2. Aerodynamics - Motards are unfortunately poor in this respect as they are not built for top speed! You can lower the suspension, if you only ride on the road, and ride macham rempit like that.

 

Unfortunately fairings and windscreens Ahem, not suitable for motard. At all. Pity, cos I love my lamilar flow windscreen. Solved a lot of aero issues.

 

3. Tyres. Use road tyres. Less rolling resistance than offroad tyres, if you're using them. Look for tyres with smoother looking treads and less grooves. Change to aftermarket road optimised rims if available, that are lighter than stock.

[MrHui]

Nice info there

[kifakw]

more BHP = more top speed ... !

 

more torque = gives you the more pull 'feeling' !

 

but bhp must see at wheel or at crank, tat's a whole lot of difference.

[jyo]

thanks stsoh, kaylan .. kaylan, i am intending to replace my air filter to K&N.. in your opinion.. its pointless ? As in other than its re-usable, it wont take any effect on my bike performance ? .. i read an article on the smaller the engine capacity, the lower the RPM needed for the bike to gain speed when modification are made. Eg Air filter.. exhaust

 

Pls englighten.. thanks !

[Man Donut]

My 2cents, I ride a X1R, modded it, almost blindly and without research...

I added k&n air filter, yoshi pipe, changed the cdi etc, at the end of the day yes, my top end increase, yes my pickup increase. But long term run, uncle at caltex noe my name, no. plate, bike colour becoz my constant trip. I had to do an engine overhaul when my block crack.

 

Easier say, live wit wat you have, want more power...

Theres alwaes class 2a and 2 bikes. SOmetimes its just better to wait then being impromptu.

[DeusExMachina]

2 or 3 HP increase can usually be gained by simply putting a "46" sticker on your bike.

 

If you cover up one headlight and stick the "46" over it, you have a +5HP bonus on top of your 2 or 3 HP.

[hachi]

More bhp sell the bike.

More Torque accelerate bikes

[joeboxer82is]

Peak figures don't really matter.It's e shape of the curve on e dyno chart that matters.The way it delivers the power is what matters be it on track or road.

[epk]

2 or 3 HP increase can usually be gained by simply putting a "46" sticker on your bike.

 

If you cover up one headlight and stick the "46" over it, you have a +5HP bonus on top of your 2 or 3 HP.

 

don't forget folding in your mirrors. +3HP. removing mirrors give you +5HP too.

[Pandoras Kitten 3]

thanks stsoh, kaylan .. kaylan, i am intending to replace my air filter to K&N.. in your opinion.. its pointless ? As in other than its re-usable, it wont take any effect on my bike performance ? .. i read an article on the smaller the engine capacity, the lower the RPM needed for the bike to gain speed when modification are made. Eg Air filter.. exhaust

 

Pls englighten.. thanks !

 

 

A bit of a late reply ; the consensus (between car and bike enthusiasts overseas) is that the filter itself does not add power.

 

Whereas improving the intake system does. (reduced restriction, short ram, ram air & cold air intake, pressure mods etc)

 

If you had a car, a non-performance stock intake replaced with a AEM, K&N, or other "cold air intake" system that's straighter and takes in cooler air outside the hood, do improve performance. Don't waste money on a fancy K&N that's hard to service otherwise.

[DeusExMachina]

don't forget folding in your mirrors. +3HP. removing mirrors give you +5HP too.

 

Who needs PC3 and aftermarket exhaust??

 

Free HP comes so easily......

[rockerz90]

2 or 3 HP increase can usually be gained by simply putting a "46" sticker on your bike.

 

If you cover up one headlight and stick the "46" over it, you have a +5HP bonus on top of your 2 or 3 HP.

 

haha.. nice one..

[robbedzombie]

it means that when u buang ur bike and kena 100dmg, still have 2-3hp left so can still survive.

[rocklobster]

Who needs PC3 and aftermarket exhaust??

 

Free HP comes so easily......

 

fold in mirrors, paste a few stickers, use FIAT paintwork and wear rossi helmet = 15 additional BHP...

 

 

robbedzombie: it means that when u buang ur bike and kena 100dmg, still have 2-3hp left so can still survive.

 

hahahah i laughed so hard when i read this... need to drink x-potion or elixer to restore ur bike hp....

 

 

from my conversations with my mechanic, mods to increase torque/pick up/top end etc cannot be done alone.... meaning you cant just throw in a KNN airfilter into ur bike and expect results... the carburator needs to be retuned or maybe the jetting needs to be changed to accommodate the increased flow of air... bike engines must be considered as a whole system, cant just change 1 part and expect immediate results...

[rocklobster]

http://bikeadvice.in/increase-performance-motorcycle/

 

found this article talking about air filters and the need to retune your bike after installation...