[DeTomaso] Hp difference between efi and webers

[Paul - Home]

I agree with everyone else's responses.  They will operate at similar 
levels of peak power more dependent on tuning than on the system.

Based on what I've read, your peak horsepower with a big Holley will be 
higher than with webers or IR EFI.  This is due to the air flow 
limitations of the IR system.  With a Holley and a single plane manifold 
you can pull the full CFM capability for all 4 butterflies on each 
cylinder, while an IR manifold only sees the single butterfly.  I 
believe a 48mm weber is rated at about 330CFM.  This maximum depends on 
your engine build and won't show a difference with a stock 351C.

Of course in terms of everything else (drive-ability, mileage and 
starting) a well tuned EFI system or a well tuned set of webers will be 
better.

The question you need to answer is the relationship of price vs. peak 
power vs. everyday usage.

Paul
#9270

boyd casey wrote:
> I know the efi setups are supposed to increase drivability , improve mileage
> and startability but based on just horse power difference What can someone
> expect if all othet things remain unchanged and I were to convert from a
> Holley 650 with an Edebrock  type aluminum intake manifold and  a. switch to
> 4 weber IDF's  (with the appropriate venturis or a weber style( throttle
> body)  efi ( Redline, TWM, Dynatek, Imagination injection )  is there a
> substantial HP difference?
> 
> Boyd 1973L # 5783
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