[Diy_efi] tiny injection

[Stephen Andersen]

> One thing we are working on is a dual throttle body set-up where a 
> computer controlled t/b is placed before the s/c.  This 
> approach allows 
> the s/c to be sized much more aggressively for much earlier boost, as 
> well as slightly more efficient operation.  (Recall that all 
> these crank 
> driven centrifugal s/c have a boost output linear with RPM - a 
> disadvantage compared to exhaust-driven, or pos. 
> displacement.) Like a 
> wastegate function, except there is no "waste."
> 
> Marc Reviel
> PowerLogix, http://powerlogix.com, co-owner/CTO
> Forced-Air Systems of Texas, http://www.f-a-s-tonline.com, co-owner

My understanding was that the output of a centrifugal compressor 
was a function of rpm^2, not linear.

Also, a secondary function of the bypass, regardless of the location
of the blower before/after the throttle body, is to bypass the 
compressor under low load conditions and reduce parasitic
drag when no boost is "needed".  This is probably more important
for a positive displacement blower though...

Steve

_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi