.....  therefore upsetting the A/F ratio.  Rather, view it as simple a mechansim for ensuring that more of the air/fuel mixture already there at the intake port gets into the chamber each time it opens. 

 

OK, I guess I can see that. 

 

Next silly question- If temp is so important, will it matter where the injectors are?  Imagine having the stock primaries in the block, along with secondaries in the TB.  I imagine that the fuel atomization lowers the temp, so will the temp change along the pipe as new injectors are encountered?  Would it be better to have all 4 injectors in the throttle body? 

 

Rusty (EDDIE perturbance)

 

There is no doubt that having fuel injected and turned to vapor in the runners will indeed lower temps.  My most recent intake tubes (4 injectors in throttle body) gets so cool that moisture would condensed on them on a 80F day.  First thought I had a fuel leak {:>).   I guess we could do what Mazda did, they used coolant to stabilize temperature of their intake manifold. 

 

Have not really got into thinking about some of the second order effects.  They mostly would affect the speed of sound, slowing it down mostly.  That would in effect lower the EDDIE rpm requried.

 

Considering the magnitude of the effect on EDDIE, variations in Manifold Air Temp is about the third most significant factor - maybe the fourth. 

 

Ed