BlackSSNick

iTrader: (2)

twin charging is incorporating a turbo with your supercharger. your turbo speeds up the air that eventually will go through the supercharger making your supercharger work harder and make the supercharger temp increase.

Yes it gives you a lot of power, but it is very inefficient. Because your supercharger is working harder it dramatically reduces the life of it.

If you want to make good power and run more efficiently, just go turbo and ditch the supercharger.

I talked to turbo experts about twin charging and they told me it's not worth it just go flat out turbo.

ShortStack

The supercharger, once past 12 psi, is no longer used. The air is moving through it, but it is no longer making boost, which means it is no longer making heat.

The supercharger is used for the first 1.5 seconds till the turbo spools then it stops creating boost.

Would you have the SAME EXACT results if you used the same turbo thats on the twin charger kit without a supercharger? Yes. But it will also take a year and a half to spool.

Sw4y1313

Incorrect. Please do research before you speak. Like ShortStack said, the SC is FREE spinning after it hits 12psi(bypass valve is opened), so therefor not working at all. The supercharger is used to create power aka exhaust gas to spin a larger turbo about 2x faster then it would normally without the supercharger. In my mind, its an amazing idea, and I plan on using it on my 1.6ltr crx, but with an M45 instead of M62.

HunterKiller89

iTrader: (1)

furthermore, since the bypass valve is open, it is safe to say that pressure pre blower (but post turbo) and post blower are equal (or close enough). Air can travel through the roots of the blower, but will not be compressed. Remember, this is a roots, not a twinscrew. air moving through the rotors does NOT mean compression.

2006blackss

Wow, someone doesn't research before they speak

BlackSSNick

iTrader: (2)

my bad, I stand corrected. No one ever told me this about the kit, and everyone I talked to said it wouldn't be very efficient.

Maybe I will get this kit eventually.

HAha i feel like a *******.

rocketrex

sad but true!

2006blackss

That may be but the cobalt was made w/ a supercharger therefore designed/altered by GM to be this way. I wasn't tryin to dig that deep into it. Thanks for the wise ass input though!

WickedSS2005

iTrader: (1)

Gee thanks Paul, I'm not fat and I like my blower

06blackg85ss

iTrader: (1)

lol anytime guys


and the supercharged is not bypassed at all, I guess the pulley is clutched, from what I remember (way back in the day when I still had the pos on my car) it was belt driven off the motor and always spun no matter what. Leaving you with: Frictional losses, rotating mass, and well the over all drag of the s/c. Whether the bypass is open or not, it's still moving air and creating heat. V-dub's had the only factory twin charged setup with a clutched pulley on the s/c (like an a/c comp) to stop rotating the s/c and free spin once it came in to boost.

god and people above were talking about doing research......

it's only a wise ass input if you can't take the truth......


thank you, have a nice day.

btw show me on the LSJ where it says GM anywhere on the damn thing..... last time I looked (when I took my motor apart last weekend) everything says saab.

SS33

The only really efficient way to do this is to have charge piping with the ability to truely bypass the SC above certain boost levels. With our Intercooler set-up this would be nearly impossible.

A clutched SC also helps, but we still hafta push air through the M62 which is less than ideal. Ideally a bypass valve would redirect boost into a bypass pipe that would re-enter the intake post SC

But under those circumstances twincharging would be amazing. The piping and electronics required to redirect all of that air around the SC would be difficult, but it would truely give you the best of both worlds without having to make big compromises

ShortStack

There still is some parasitic loss from the s/c actually spinning, but no where near the same amount as if it were making boost.

WickedSS2005

iTrader: (1)

Seriously, why bypass the blower at all? Run small psi on the turbo, into small psi on the blower... Make the blower and turbo work TOGETHER...

The blower is a compressor with a mathematical formula for it's compression. The turbo psi will be "compressed" persay to "multiply" the boost. I have the schematics on my desktop, but w/e.

Enjoy.

ShortStack

because if you were to do that, my bet would be that 16psi from just the turbo will put out better than 16psi from the two combined (8 + 8).

HunterKiller89

iTrader: (1)

because the whole idea of going twincharged is to have a highly efficient turbo doing the compression at the top end, and not a heat generating unefficient supercharger doing it.

BlackSSNick

iTrader: (2)

again i say just go all turbo and be done with it

widebody_balt_ss

we learn things everyday. Glad you didint argue the fact and took the time to listen.

eurochevy

Paul is right though..saab is plastered all over the god damn car