In pro-and-con reviews of superchargers and turbochargers, I've seen claims that superchargers can develop boost at lower rpm than turbochargers due to being directly linked to the engine via the belt.

Okay, I can see that, but is the supercharger boost at low rpm enough to overcome the parasitic drag of the SC? Any dyno data to prove one way or the other?

Thanks!

 

unless you get a smaller midget or urchin, boost wont come on until mid 3500 on stock 3.6 pulley... with a 3.25 it comes at about 3k... and a 2.87 comes even earlier at around 2.5k i believe..

so in a effect you DO NOT want boost at lower RPMs because we suffer from high-torque which comes with torque steer and loss of traction..

perhaps its better that the boost comes in at after 3k so you can launch the car correctly. even then. its a roll of the dice you can maintain traction....

---cheston

 

Depends on the type of supercharger... positive displacement vs. centrifugal...

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

 

Assuming Stillen SC setup on Maxima, my boost gauge nudges past zero into positive range at 2500 rpms with the 3.33" pulley. Past that, it is all that makes you smile

Cheston is correct. Our cars are quite torquey as it is. Low end boost will only deliver torque steer & wheel spin...and lots of it.

 

Like they said it all depends on the pulley size...and it seems to me like a custom intake with it helps it spool or rather kick in a little quicker.

 

I got the 3.125 pulley, and boost doesn't come on until 3k rpms. Under 3k rpms, the car feel very sluggish. Maybe it's because of the auto tranny. If I had a 5spd, I would go for the turbo(kit not available for automatics yet).