Supercharger and Turbocharger - United Bimmer Community

**SHAHAB323IS** · 04-17-2005, 07:12 PM

Turbochargers and Superchargers are air-compressors that are used to suck more air into an engine and compress the air, compressing the air allows more air to go into each cylinder, this also allows more fuel to go into the cylinder which means you get more power from each explosion in the cylinder, the amount of air that the compressor pushes into the engine is measure in pounds per square inch(psi)

A supercharger is driven by a belt connected to the engine like an alternator

A turbocharger uses exhaust gas to spin it's turbine

more info can be found at these links

http://www.howstuffworks.com/question122.htm

http://www.howstuffworks.com/turbo.htm

http://www.superchargersonline.com/content.asp?id=31

http://www.superchargersonline.com/content.asp?ID=76

http://www.superchargersonline.com/content.asp?ID=85

http://www.superchargersonline.com/c...at.asp?group=2

....anyone else?

**528man** · 04-17-2005, 09:10 PM

good finds, thanks shahab

**94bmw325i** · 04-19-2005, 07:22 PM

cool, I never was really up to date on how superchargers worked.

**///M Power** · 04-20-2005, 09:32 PM

Well, it's a little bit more complicated than that.

**bostongreen18** · 04-26-2005, 02:25 AM

the german word for supercharger is kompressor - the badge is found on supercharged mercedes

**komodo** · 04-26-2005, 09:56 AM

Quote:

Originally Posted by bostongreen18

the german word for supercharger is kompressor - the badge is found on supercharged mercedes

Oh really? Wow... I never knew that. Awesome.

**SHAHAB323IS** · 04-26-2005, 07:20 PM

Quote:

Originally Posted by komodo

Oh really? Wow... I never knew that. Awesome.

noob...jk

witeshark · 04-26-2005, 11:35 PM

Shahab's summary is right, and also explains why turbos have lag, having to wait for the exhaust gasses to start flowing. Smaller bi- turbos help by reducing turbine rotation inertia

**dwrx04** · 04-27-2005, 03:12 PM

you can get lag from a lot of things like have a small turbo and a FMIC you can also get it from heat soak.

**SHAHAB323IS** · 04-27-2005, 07:15 PM

btw guys i said anyone else? so others can add info as necessary, i'm not expert, this is just to help people who don't know that mutch about forced induction

**dwrx04** · 04-28-2005, 01:19 AM

heres some more stuff on turbos in general

http://www.turbocalculator.com/turbo-works.html
thats kind of an over view

this link is great it will answer any question you will have on turbos. The site is kinda weird to navigate through but once you figure it out ur golden.

http://www.turboclub.com/turbotech/turbopremod1.htm

THis next link is awesome it talks about everything from turbos to camber angle for racing and weight transfer

http://www.jumptronix.com/2g_go_fast...e_Material.htm

Yeah so now that you have read all that you know everything about cars WOOOHOOO

**Addicted?** · 04-28-2005, 01:22 AM

Quote:

Originally Posted by dwrx04

heres some more stuff on turbos in general

http://www.turbocalculator.com/turbo-works.html
thats kind of an over view

this link is great it will answer any question you will have on turbos. The site is kinda weird to navigate through but once you figure it out ur golden.

http://www.turboclub.com/turbotech/turbopremod1.htm

THis next link is awesome it talks about everything from turbos to camber angle for racing and weight transfer

http://www.jumptronix.com/2g_go_fast...e_Material.htm

Yeah so know that you have read all that you know everything about cars WOOOHOOO

good links

David

**munichman** · 07-26-2005, 12:28 PM

http://home.att.net/~jroal/jay/bmw.htm

interesting project putting a turbo in a 318i, makes me think about doing it to a spare 318i i have laying around

**94bmw325i** · 07-26-2005, 02:42 PM

should do it!

**german speed demon** · 10-07-2005, 11:53 AM

The only problem I see with superchargers is the fact they can use up to 20% of thier power output simply for operation. Of course, this problem can be opposed by the problem of turbo lag.

Dave

**Longhairedhippy** · 10-07-2005, 03:14 PM

a supercharger, however, will put out far more than it draws at the peak. I'd rather have my power when I want it and not be entirely efficient than have to constantly worry about keeping my car on-boost while i'm driving.

**///M Power** · 10-12-2005, 04:18 AM

Quote:

Originally Posted by witeshark

Shahab's summary is right, and also explains why turbos have lag, having to wait for the exhaust gasses to start flowing. Smaller bi- turbos help by reducing turbine rotation inertia

By requiring LESS rotational inertia. Thus they can get up to speed faster, but will eventually hit a proverbial brick wall. This is where the larger second sequential turbo picks up.

Mazda FD is the perfect example.

**Addicted?** · 03-02-2006, 06:24 PM

or one huge turbo that just kicks you in the ass works.. haha, no it all depends on what the car will be used for.. for drag its a completely different setup than autox... that is why i was happy with my vf34 i put on my WRX, best of both worlds... but would eventaully stop making power... getting 300whp out of her was easy enough and she could see 350-400 but not from me!

David

Storamin · 04-01-2006, 07:28 PM

i love people who rag on turbo lag. a properly set up car will not have turbo lag. turbo lag is something that was a problem in the 80s, not so much now.

however, SC > turbo on the track.

**gtowndu** · 05-04-2006, 01:53 AM

It really depends. You want a turbo to stay spooled when you shift. Every gear you hit goes right into the turbo's powerband. All those 900rwhp supras are all single turbo setups