Turbo and Supercharger

[HeadKracker]

what are the main differences between a turbo and a blower?

[VT-565]

a turbocharger is driven by exhaust gases, so it will be hooked up to an exhaust manifold whereas a supercharger is belt driven

[blofly]

a supercharger also costs crank horsepower to run it, where as a turbo charger uses free exhaust waste pressure! You know what's better than cheap?.... FREE! a basic rule of thumb is an engine that makes 200rwhp with a supercharger will produce 220rwhp if the supercharger was replaced with a turbo charger

[sixshooter]

Power delivery is better with a blower than a turbo....turbo's fall into holes down low whenever the exhaust gas flow drops...

I'd compare them to be like Harleys and TwoStrokes...

Blower (Harley) has grunt to spare...always responsive...

Turbo (Two Stroke) needs revs to be in its power band...

I'd say the blower is best for the street...

[greenfoam]

Power delivery is better with a blower than a turbo....turbo's fall into holes down low whenever the exhaust gas flow drops...

I'd compare them to be like Harleys and TwoStrokes...

Blower (Harley) has grunt to spare...always responsive...

Turbo (Two Stroke) needs revs to be in its power band...

I'd say the blower is best for the street...

Firstly I don't mean to be a pain in the ass but I love two stroke engines and will defend them to the death :P. Two strokes make masses more torque than a 4 stroke can even in it's dreams : ). That's what firing twice as often does for you, if you ever ride a 250 cc two stroke motorcrosser and then ride a 250cc 4 stroke you will see what I'm talking about, the 2 stroke will just about pull your arms off and you'll have trouble keeping the front wheel on the ground, the 4 stroke will hardly pull a mono with you leaning back and yanking on the bars . CR500's KX500's and even YZ/WR490/500's and in another realm again, Those old 2 stroke bikes will all do a 12 second flat 1/4 mile straight out of the shop, stock as you like

Also look at this

Apart from the roots style blowers which boost early. The turbo is much stronger than the centrifugal blowers which most kits use

[sixshooter]

Firstly I don't mean to be a pain in the ass but I love two stroke engines and will defend them to the death :P. Two strokes make masses more torque than a 4 stroke can even in it's dreams : ). That's what firing twice as often does for you, if you ever ride a 250 cc two stroke motorcrosser and then ride a 250cc 4 stroke you will see what I'm talking about, the 2 stroke will just about pull your arms off and you'll have trouble keeping the front wheel on the ground, the 4 stroke will hardly pull a mono with you leaning back and yanking on the bars . CR500's KX500's and even YZ/WR490/500's and in another realm again, Those old 2 stroke bikes will all do a 12 second flat 1/4 mile straight out of the shop, stock as you like

Also look at this

Apart from the roots style blowers which boost early. The turbo is much stronger than the centrifugal blowers which most kits use

Mate I got nothing against 2 strokes... I've owned heaps of them...last being one of these...drool drool...I wish I kept her now...and put the motor in a gocart :P

When I was speaking of blowers I assumed the thread was all about screw type chargers and not those certifugal (turbo with a belt) type POS..

Thanks for the graph... it just shows out the Turbo hole I was speaking off...

You want big boost ya buy a big turbo...then you need high velocity gasses to spin the thing... which = revs... & big Turbo = mass... which = more energy needed to get it going...
which = lag....which = hole in rev range... which = car thats a pain to drive... unless its a manual...

[greenfoam]

But that's also great the turbos, that they don't boost early, who wants 150 hp at 1000 revs ?? not me. I don't want to pay for the fuel to make that much power at revs I don't want or need it. How could I drive around the gravel roads in the vineyard like that, I'm allready sideways half the day as it is with 10% throttle on a stock motor. Having stock power and ecconomy on the highway is cool I reckon, then at 2500 rpm your torque and power triple in about 2 seconds for eyeball stretching fun

RG500's are sweet machines I never rode one but had a go on a RZ350, that was still fun, Still have a very good condition "beast" IT 490 in my shed

[IBLOWN]

there is a difference between power and torque. 2 strokes dont have torque they have alot of power. thats why you can virtually idle a 4 stroke up a steep hill and have to rev the guts out of a 2 stroke. anyway, go the blower!

[sixshooter]

Still have a very good condition "beast" IT 490 in my shed

Go the IT's... I had a 250 on my L's...they're a great dirt bike...

[minux]

But that's also great the turbos, that they don't boost early, who wants 150 hp at 1000 revs ?? not me. I don't want to pay for the fuel to make that much power at revs I don't want or need it. How could I drive around the gravel roads in the vineyard like that, I'm allready sideways half the day as it is with 10% throttle on a stock motor. Having stock power and ecconomy on the highway is cool I reckon, then at 2500 rpm your torque and power triple in about 2 seconds for eyeball stretching fun

RG500's are sweet machines I never rode one but had a go on a RZ350, that was still fun, Still have a very good condition "beast" IT 490 in my shed

Frinds VS senator has better fuel usage with his 15psi blower then he did before it, blowrs dont instantly kick in when your cruising around. Besides, i prefer a blower simply because by the time the power kicks in on a turbo the blower has already propelled you far enough ahead.
Plus you dont have the gay sound of a turbo whine

[sixshooter]

Plus you dont have the gay sound of a turbo whine

ppppfffffffttttttt....whirrrr... whirrrr.... Lmao !

[greenfoam]

I love the sound : ), oh well I see this is a matter of opion and opinions are strong : ), I stilll say 2 strokes make almsot twice the torque of a 4 stroke, sure maybe not as much straight off idle but I think thats got to do more with the tune of the engine that it being 2 stroke, My IT rips a whole in any dirt road ever time it fires leaves tracks like this - - - - - - - when almost idling in first gear. Oh yeah but once the pipe starts holding the fuel in the cylinder there is monster Earth ripping torque there

[MOTIV8]

Torque;

(T) Twisting force or moment, measured in newton-metres (Nm) or millinewton-metres (mN-m). T=Fd, where d is the moment arm. Torque constant (K T ).

Torque is a measure of an engine’s ability to do work and power is the rate at which work is done, (Note torque is independent of crank speed).

For a good explanation of it all with animated pictures check out this site here.



Anyway to get back to the topic about the differences between turbos and superchargers, it has already been mentioned that superchargers are belt driven from the crank pulley and turbos are spun from the exhaust gases.

So basically your supercharger is turning at whatever speed (or a ratio thereof), your crank is turning at and this of course means that your suopercharger will increase your engine power at exactly the same rate your engine revs pick up. This means instant power right across the rev range from idle to redline.

A turbo is dependant on exhaust gases so until you achieve an output of exhaust gases sufficient to spin the turbo you will not be getting any power out of it and likewise a lag between planting the foot on the acclerator and the turbo spinning up to speed and generating power.

[minux]

Anyway to get back to the topic about the differences between turbos and superchargers, it has already been mentioned that superchargers are belt driven from the crank pulley and turbos are spun from the exhaust gases.

So basically your supercharger is turning at whatever speed (or a ratio thereof), your crank is turning at and this of course means that your suopercharger will increase your engine power at exactly the same rate your engine revs pick up. This means instant power right across the rev range from idle to redline.

A turbo is dependant on exhaust gases so until you achieve an output of exhaust gases sufficient to spin the turbo you will not be getting any power out of it and likewise a lag between planting the foot on the acclerator and the turbo spinning up to speed and generating power.

Belt driven fromt he crank pulley? most run from the power steering pumps these days

[MOTIV8]

And where is the power steering pump driven from?

I was basically trying to say that it is powered through a system of belts and pulleys that originate from the crank. The supercharger runs at a speed or ratio of the speed of the crank speed.

My humble apologies to everyone who felt offended by my ommission of the power steering pump, alternator, water pump, or any other equipment that is driven off the crank or in turn driven off the equipment that is in turn driven off the crank.