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Old 02-25-2006, 03:32 PM   #1
Fender89
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Superchagers

can someone explain to me how they work and what performance parts you can buy for them to up the psi?
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Old 02-25-2006, 03:44 PM   #2
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lets see
a supercharger works by ramming more air into the engine, the same thing a turbocharger does, but does so in a different way, a turbo uses exhaust pressure to spool it up and then it works very good, but a supercharger is driven by the torque of the engine, so right from idle there is increased power.

the only problem with superchargers and performance is that you need a little bit of power to run the blower itself. so a lot of people will prefer a turbo kit

as far as I know for modding a supercharger

changing pulleys around can up the psi and give you more power, but its not a good idea to go too high with it, engines can blow up

now i just woke up maybe a half hour ago but im pretty sure thats about right
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Old 02-25-2006, 03:55 PM   #3
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Quote:
changing pulleys around can up the psi and give you more power, but its not a good idea to go too high with it, engines can blow up

what size pulley? http://www.horsepowerfreaks.com/pric...harger_Pulleys

there is a link
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Old 02-25-2006, 04:06 PM   #4
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i dont know what size pulley,

well for starters, what kind of car/engine are you talking about?

i was just explaining how a supercharger works

edit- i generally wouldnt put any more than maybe 20 psi on an engine
you plan on using most days
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Last edited by nighthawk : 02-25-2006 at 04:09 PM.
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Old 02-25-2006, 04:11 PM   #5
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chevy cobalt ss
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Old 02-25-2006, 04:24 PM   #6
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well the cobalt already has a supercharger (im sure you know that)

its a 2.2liter engine with 205 hp

so its running very low psi I would guess
like 5psi or something

just shop around for a pulley to increase the psi to roughly 10-15
and then youll have way more than enough power for a regular car.
if I had a look under the hood, id be able to tell you which pulley to replace etc...
just use a knowledge of pulleys to deciede which one needs to go smaller if you own the car, but if your just curious and dont have a cobalt ss
there should be plenty of information up here already
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Old 02-25-2006, 05:08 PM   #7
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The Cobalt produces up to 12psi.
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Old 02-25-2006, 06:05 PM   #8
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Quote:
Originally Posted by chris_knows
The Cobalt produces up to 12psi.


i didnt know that... i guess cause its a smaller engine
and im pretty sure that the psi goes up in a supercharger as the revs go up,
i would assume anyway
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Old 02-25-2006, 06:26 PM   #9
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Quote:
Originally Posted by nighthawk
i didnt know that... i guess cause its a smaller engine
and im pretty sure that the psi goes up in a supercharger as the revs go up,
i would assume anyway
Yeah, I had never thought about it too much, but when I looked up the info on the Cobalt, I saw it said "up to" 12 psi, and so I figured it would be less at lower RPM's...
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Old 02-25-2006, 06:35 PM   #10
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maybe there is a term "peak boost/psi"
that would make it easier
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Old 02-27-2006, 02:18 PM   #11
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"up to" means that at it SHOULD be producing 12psi by the end of its powerband. and yes, superchargers produce more while the revs go higher.


btw, minor correction. not all superchargers give instant boost from the start. centrifugal ones (or as some like to call them, the "Vortec" ones that look like turbos) do have some "lag"..... its not really lag, but something similar.


as for the pulley thing, companies that sell them will tell you which size will offer you wat u want. other than that, the simplest way to explain it is that the smaller the pulley is, in theory, the more air it will be able to ram in the same amount of time.
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Old 02-28-2006, 03:02 AM   #12
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As memory serves, the Stage 2 Cobalt SS kit (GM Performance Parts) runs a 77.9mm pitch diameter pulley. You can't just put the pulley on the motor, you need to flash the ECU and put some larger injectors in as well. The supercharger has a diverter valve that will bypass excess pressure, on the stage 2 kit the supercharger will run 17psi from about 3,000 to redline.
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Old 02-28-2006, 03:17 AM   #13
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OH, and the Cobalt SS is a 2.0L Supercharged... not a 2.2L. It carries the LSJ engine code, F35 transaxle code (Manual)... should you ever need to know.
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Old 02-28-2006, 08:59 PM   #14
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Quote:
Originally Posted by Bino
OH, and the Cobalt SS is a 2.0L Supercharged... not a 2.2L. It carries the LSJ engine code, F35 transaxle code (Manual)... should you ever need to know.

my bad, but I thought since its the ecotec engine its still 2.2L like in sunfires and cavaliers and whatnot
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