cc to HP

[fowler]

whats the aprox convertion

 

[devino246]

There isnt one. CCs is unrelated to horse power. You could have 2 engines, both the same CCs, but totally different horsepower.

 

[fowler]

fair enough i thought there was a very wide conversion
basiacy i want to know what motorcyle engine would be more powerful than my honda GX 390

 

[devino246]

How many CCs is the bike engine? if you know the amount of torque and RPMs of the bike engine, you can figure out HP from that. Im sure you could find specs on google

 

[fowler]

i dont have a bike engine i want one better than my honda GX 390 i have now

 

[devino246]

O, i see. GX390 is 13HP right? mabe like a 250cc

 

[fowler]

sweet that makes it simple

 

[Blazkowiez]

O, i see. GX390 is 13HP right? mabe like a 250cc

No, I'm wanting to beat you over the head with a cricket bat now.

CC = Cubic Centimeters which is DISPLACEMENT

HP = Horsepower is typically a unit of measurement used to describe an engine's strength

While sometimes larger engines have more horsepower this is not always true to we can a not ever assume an engine with larger displacement is the badder engine, for example: the 150cc GY6 clones typically are rated a 6.2hp and are placed on gigantic karts, bad idea, the engine runs pathetically slow, but stupid people look at and say, "hot ****, they rated this engine by CC's and its shiny, I'll take this kart, 2,000 dollars? No problem, here is my Mastercard!" At the same time, many smaller karts are running these gx200 clones with are rated at 6.5hp and the same man looks at it and says, "what cc's is that engine? the kart doesnt have forward and reverse? go to hell!"

THERE IS NO BASIC CORRELATION. (and most people are crazy) If it wasn't for the figure of the dancing banana I'd be in rage mode now.

 

[Kaptain Krunch]

No, I'm wanting to beat you over the head with a cricket bat now.

CC = Cubic Centimeters which is DISPLACEMENT

HP = Horsepower is typically a unit of measurement used to describe an engine's strength

While sometimes larger engines have more horsepower this is not always true to we can a not ever assume an engine with larger displacement is the badder engine, for example: the 150cc GY6 clones typically are rated a 6.2hp and are placed on gigantic karts, bad idea, the engine runs pathetically slow, but stupid people look at and say, "hot ****, they rated this engine by CC's and its shiny, I'll take this kart, 2,000 dollars? No problem, here is my Mastercard!" At the same time, many smaller karts are running these gx200 clones with are rated at 6.5hp and the same man looks at it and says, "what cc's is that engine? the kart doesnt have forward and reverse? go to hell!"

THERE IS NO BASIC CORRELATION. (and most people are crazy) If it wasn't for the figure of the dancing banana I'd be in rage mode now.

You are 100% correct, but so is he. The lowest power 250cc motorcycle engine i have seen is around 18hp. Even if it was somehow rated at 10hp, it would still be better than a gx390.

Although you really can only guess at hp using CCs, he is still technically correct, a 250cc four stroke, or a 125 two stroke would be far better than the gx390.

 

[devino246]

I was saying, a 250cc bike engine would be better than a GX390, not that it was the same as or correlated to.

 

[Blazkowiez]

Many of the GX270's can smoke a 250cc engine when properly equipped (look up NASKarts). You're favoring the bike engine because of the gearing. Yes, typically the larger the engine the larger the horsepower. I in no way want to encourage that way of thinking.

 

[devino246]

But thats when properly equipped, not when stock. stock GX390=13hp stock 250cc bike engine~18hp

 

[gocart]

whats the aprox convertion

I have to agree with the others, there is no relationship between displacement (cc's) and raw horsepower. To prove this, here is a list of briggs (horizontal shaft) engines that I compiled for you.


80cc = 2.4 hp VANGUARD SERIES 50000
148cc = 3.5 HP I/C Model Series 92200
148cc = 3.5 HP INDUSTRIAL PLUS ™ Model Series 93400
126cc = 4hp VANGUARD Model Series 86400
206cc = 5.5 HP PowerBuilt ™ OHV Model Series 126400
181cc = 6 HP VANGUARD ™ Model Series 118400
206cc = 6.5 HP INTEK ™ PRO Model Series 123400
215cc = 7.5 HP VANGUARD ™ Model Series 138400
305cc = 8 HP PowerBuilt ™ OHV Model Series 201400
342cc = 11 HP PowerBuilt ™ OHV Model Series 210400



Notice that the 6hp is actually smaller cc than the 5.5hp. Also note the significant jump in cc between the 7.5hp and the 8hp.

 

[Kaptain Krunch]

Many of the GX270's can smoke a 250cc engine when properly equipped (look up NASKarts). You're favoring the bike engine because of the gearing. Yes, typically the larger the engine the larger the horsepower. I in no way want to encourage that way of thinking.

Motorcycle engines have sequential gearboxes (usually 5 or 6 spd), they are meant to move the vehicle at highways speeds, and than some, they generally have a much higher redline than these industrial engines, and the power the weight ratio is far better.

I highly doubt a built to the max, gx270, with a torque converter and the perfect gearing could smoke a modern 250 motocross engine, or a ninja 250 engine. the ninja 250 makes somewhere in the 40hp range, and can easily hit 10k, a 250 motocross (2 stroke) will easily make 40-50hp stock also. Now, you add that all up with a gearbox, and you have yourself a fast machine.

 

[modelengineer]

Many of the GX270's can smoke a 250cc engine when properly equipped (look up NASKarts)

No.

Aprilia RSV250 = 60hp, and that's just one example. There are many others, but even so, a 13hp bike engine would be quicker than a 13hp industrial engine IMO because of the ability to rev and the gearbox.

Don't look for the cc's of the bike engine, look for the HP and decide if it's what you want.

 

[Blazkowiez]

No.

Aprilia RSV250 = 60hp, and that's just one example. There are many others, but even so, a 13hp bike engine would be quicker than a 13hp industrial engine IMO because of the ability to rev and the gearbox.

Don't look for the cc's of the bike engine, look for the HP and decide if it's what you want.

Model, all I was saying it is possible, not that it will happen all the time. Understand that it is physically possible and does happen, I was trying to state that you can not look at the displacement, you must look at horsepower and how it is transferred.

 

[modelengineer]

Ah, the statement sounded like you were saying you could mod a 13hp engine to beat any 250cc bike engine. Sorry for the misinterpretation (stupid internet )

 

[sideways]

I highly doubt a built to the max, gx270, with a torque converter and the perfect gearing could smoke a modern 250 motocross engine, or a ninja 250 engine. the ninja 250 makes somewhere in the 40hp range, and can easily hit 10k, a 250 motocross (2 stroke) will easily make 40-50hp stock also. Now, you add that all up with a gearbox, and you have yourself a fast machine.

Those Ninja 250s have a redline of 22'000rpm, absolutely no power under 10'000rpm but hey, what do you expect?

As for displacement to hp, a friend of mine has several 3hp Diesel Lister engines, they are about 2200cc, so that's 1.36 hp per 1000ccs of engine capacity. Superkart engine's are 250cc and about 100hp so that 400hp per 1000ccs. I'm sure you see how much it can differ now.

As you get more experienced with engines you will be able to just think off the top of your head "old aircooled 250? Probably around 18 or so hp" "200cc side valve industrial engine? Probably a 5 horse" ect ect.

Thanks

Hayden

 

[TOO FAST]

It's torque you really want to know

 

[devino246]

But RPMs can be converted to torque through gearing.