Funny you should mention the #2 nozzles ... Dave and I were chatting about
a Starter Fuel system for something with a Turbo on it this morning....
Odd ball set up.... but hey when your an Odd Ball... oh nevermind....
K
----------
> From: Richard Fox <v4gr@rcn.com>
> To: Dave Dahlgren <ddahlgren@snet.net>
> Cc: land-speed@autox.team.net
> Subject: Re: EFI 'd Carb Manifold...
> Date: Thursday, May 10, 2001 11:52 AM
>
> OK what if you were making a manifold for a flat head 4 cylinder with
> Siamese ports? I was thinking of mounting the throttle body about 10
inches
> from the valves with a plenum behind it and 4 #6 Hilborn nozzles. 2 tubes
of
> 1 1/2 ID (port size) to the manifold face. I was trying to atomize the
fuel
> and hope each valve would get its fair share. I also have a #2 nozzle
near
> each port face attached to an electric pump to help with starting only.
> Rich Fox
> -----Original Message-----
> From: Dave Dahlgren <ddahlgren@snet.net>
> Subject: Re: EFI 'd Carb Manifold...
>
>
> >In my opinion it is like this, the factory deal is set up for emissions
and
> very
> >good performance at very low flow rates typical of all the tests they
have
> to
> >pass. most cars use less than 30 hp most of the time so the amount of
air
> and
> >fuel is very small and velocity in the runner is pretty low, so they try
> for the
> >best possible shot to get the fuel in the port with very little air flow
to
> >help. they also need the injector close to the port to help with closed
> loop
> >operation, keeping things close to the cylinder helps close the loop,
same
> goes
> >for the O2 sensor. this is contrary to performance use. Generally you
want
> the
> >injector as far away as you can get it for more time to atomize the
fuel.
> the
> >carb converted manifolds are a compromise to be honest and the ones made
> for a
> >single 4brl are the worst. See my page for what a 302 ford intake ought
to
> look
> >like converted to a race piece. the one listed as a turbo 302 intake is
the
> one
> >to look at, it will support about 1200 hp.
> >Dave Dahlgren
///
/// land-speed@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe land-speed
///
///
|