turbo/supercharging

Steve Baldwin steveb at kcbbs.gen.nz
Wed Mar 26 03:02:52 GMT 1997


> >Forget the regular tpi stuff. Use an old Hilborn 3 hole blower injector
> >minus all of the fuel plumbing as your air door. Then plumb the efi
> >injectors right at the port beneath the blower ala regular fuel rail and
> >the rest. This runs the blower in a dry, air only mode. Yes, it will get
> >hot, but they were originally designed to run air only. You have to make
> >the rotor clearances a little more than if you were running fuel through
> >it. Also, the odds of a blower explosion are greatly reduced. When it
> >get's up to temp, the clearances will be correct. Gives you the old
> >gasser look with state of the art EFI.

Are these words of wisdom spoken with experience ?
My EFI target (after I finish a couple of other garage ornaments) is a
blown, injected flathead. I have the motor (rebuilt) and the blower all
setup but with the asthmatic nature of the ports and the fact that the
blower is about 2/3 the length of the motor, distribution is a bit of a
problem. I'd like to port inject it, rather than try baffles to even it
up but I wondered if running the blower dry was going to cause more
problems, both with the extra expansion and intake heating.
Any comments ?

These things love to be blown. Every thing happens where a modern Jap
car considers to be a fast idle and a bit of puff just adds more low end
torque. Not much upsets a SBC owner more than being shut down by
something 60 years old and sounds like a tractor going through the
traps.   :-)

Steve.

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