little_rod

I was just wondering, since I have never really done a comparison of the two, I would ask you guys. Now, I am talking about mpg on a steady cruise at like 80-85 mph on the interstate with maybe a procharger or a turbo.

In the city, I know it would largely depend on how much of a lead foot you are, but I do wonder what it would be like if you drove like a sane person (yeah right ).

What I am more interested in though, is the results on the interstate cruise at like 80 for both methods of FI. Thoughts???

little_rod

Noone on this great board of knowledge can answer my questions?? Am I that good???

Probably not, speak up!!!

msink

Turbo will be close, if not the same, as stock. Nothing is happening at steady state with a turbo. With an SC, your engine is turning about 3000 RPM, and spinning the SC along with it. Ive seen data for the Miata - Turbo v/s SC MPG, and the Turbo's are much better at MPG overall. I think steady state would be an ever larger gap between the 2.

Brandon@Forged

Agreed...

joeshow750

You can install a bypass valve between the SC and throttle body to allow an SC (as long as it's centrifugal) to run on vacuum like a turbo. This helps combat the parasitic loss of the SC when you don't want boost...load driven, like a turbo. It still won't be quite as effecient as a turbo, but it will close the gap significantly.

little_rod

Hmmm, don't most systems come with a bypass valve, and will it cause a lag in the SC??? Don't know for sure if the procharger has a bypass valve included.

I kinda like the properties and price of the SC more, especially when I don't plan on going for nutty HP. I do like the potential of turbos, but they would depend on price for me.

DIGItonium

iTrader: (1)

How bout clutch activated SC? I thought I read about
sucha thing, but I doubt the ATI design will allow such
a thing.