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View Full Version : Perform. characteris. b/w Turbo & S/C??


Loozen_it
11-21-2006, 01:22 PM
Hi All,

I'm a new member here and relatively new to Canada as well (from Australia).

I want to pose the question to those running either turbo'd or S/C'd E30's.

Im well aware of the mechanical diffferences between the Turbo and S/C concept but wanted to find out first hand, what difference in performance characteristics are they?

E.g S/C running 7psi compared to a Turbo running 7psi, are we talking same/similar output?

Cheers!

jeffrie
11-22-2006, 07:30 AM
www.howstuffworks.com
Look up supercharger then look up Turbo.

Furious
11-22-2006, 07:50 PM
both will put out around the same numbers in terms of HP, the turbo may have a bit more than the SC but in terms of torque the turbo should have a substancial amount more than the SC only because the SC uses engine energy to drive the unit itself. the turbo system is more efficient this way.

330DTM
11-23-2006, 10:07 AM
The main difference will be the power made under the area of the curve which can be seen on a dyno chart; Turbo's generally have a broader area if you are comparing this to a vortech s/c. Turbo sizing is also a variable that will effect the power characteristics @ 7psi.

I've rode in both setups. The power delivery on a vortech s/c setup feels more linearly while in the turbo setup, it has a nice 'torquey' feeling once boost kicks in. I have yet to ride in a Positive Displacement (or twin screw) s/c setup, however it will probably feel like the turbo setup but with no lag.

thinair
12-01-2006, 08:40 AM
I have yet to ride in a Positive Displacement (or twin screw) s/c setup, however it will probably feel like the turbo setup but with no lag.
A PD setup doesn't feel like it's supercharged, it just feels like a larger naturally aspirated engine. That's why I like them so much :)

Darkness95m3
12-01-2006, 03:17 PM
The supercharger feels like a bigger displacement motor. Which means there is no lag.

I have raced an Turbo M3 with my Supercharged M3 a few years back. From a roll I got a 1/2 lead by the time we hit end of 3rd he almost made up the loss.