[Diy_efi] tiny injection

[Stephen Andersen]

> OK, I see what you are saying. Yes, I agree with that.  I was 
> assuming 
> you were talking about bypassing only the pressure from the s/c.

Nope, that is not required in a draw thru design!!!

Obviously we were looking at this from 2 differing perspectives,
you from the blow-thru centrifugal side, and me from the draw-thru
PD side.

> We've built a lot of s/c and turbocharged engines also.  In fact, we 
> produce kits, as well as hold several power records.  
> Notwithstanding, 
> the efficiency of centrifugal s/c's operating in a 'vaccuum,' or 
> cavitating with no flow, is almost identical.  There is no 
> question about 
> this -  we've spent many years studying the data, and developing our 
> systems/products.

So if I read this correctly, what you are saying is that you see little
difference in parasitic drag from the centrifugal under cruise or 
idle conditions whether or not you have a bypass?

I do understand that certain of the centrifugal compressor designs
are VERY unforgiving when it comes to using them without a bypass
for rapid throttle closings (read:  belt type of internal speed
increase rather than gear driven).

Now I think we are on the same wavelength!

Steve

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