Electromotive FI

[Robert Gallant]

> Interesting point about acceleration enrichments.  This must be a problem   
> only at high RPMs because my system works fine up to redline (6000 RPM   
> for my heavy Chevy).  I can imagine that this would become a problem   
> though as the RPMs get considerably higher, as in a rotary or hi-po 4cyl   
> application.  Now why would this problem get worse with a larger t-body?

On my supercharged Rx7 (btw, its a roots type supercharger), the acceleration 
compensation problem occurred mainly at lower rpm's with smaller throttle 
movements.  If I stomped on the throttle I could get enough enrichment.

I think the main problem comes from the injection taking place at the throttle 
body rather than at an intake port.  The supercharger compounds the problem 
since it wants lots of acceleration compensation immediately, and it adds lots 
of surface area that needs to be wetted.

Motec computers give you a few more parameters to fiddle the compensation than 
Holley or from the sounds of it Electromotive (I'm just going by what has been 
said here about the Electromotive, I don't have any direct experience with it).

I'm going back to port injection and adding two injectors below the 
supercharger, that will turn on around 4000 rpm and large throttle openings.

Later

Rob
gallant at oasys.dt.navy.mil