Gang;
Good examples of "1 carb barrel per cylinder" are the 4 Weber 2-bbl setups
made by Inglese, Fast Freddy, & Moon. Those IR manifolds were usually made
for four 48IDA downdraft Webers. Their intake valve-to-throttle plate length
was short and direct and their intake horns were usually fairly long to
resonate in the RPM region where additional torque was desired. Throttle
response is crisp and they make good horsepower.
Each barrel is capable of being independently tuned with combinations of
venturis, jets, emulsion tubes, etc., so each cylinder could be optimized.
Those Weber setups are $$ but they look great. So do stack injection systems
like Kinsler, Crower, & Hilborn.
Regards, Neil Tucson, AZ
-----Original Message-----
From: Rick Hammond [mailto:r.hammond@sympatico.ca]
Sent: Wednesday, April 24, 2002 5:58 AM
To: landspeedracer
Cc: hotrod32@fuse.net; Ed Lutz; ardunbill@webtv.net;
land-speed@autox.team.net
Subject: Re: To inject or not to inject...
landspeedracer wrote:
> Rick
>
> It's more accurately eight into one into eight. And the carbs uses on such
> an application most often only have primaries. Supposedly a better system,
> than IR, as the proper plenum helps the top end power. To bad Dave D isn't
> still on the list as he knows the technical details.
>
> JB
>
Right you are,
Interesting the differences between the bikes and cars. The old basics were
always the valves/ports etc., with things like the tunnel rams or spacers
playing
with the intake length/volume after the carb. Bikes had one carb per
cylinder,
usually with a K&N right on each carb, and intakes that often took nasty
twists
to fit.
Now, I look into the intake of the ST4 and I can see the valves, and the
manufacturers fight to give the airboxes as much room as possible. The
manifolds
for the cars have banks of foot-long intake runners. With injectors
spitting
right on the valves (somebody mentioned carbs being better for atomization;
fuel
droplets from a carb are bad as they can drop out, but if you have droplets
injected right into the cylinder, I would guess it isn't as bad and I wonder
if
it could even help cool if it has the chance to evaporate before
burning..hmm) it
seems that airboxes and intake runners are the new areas of potential gains.
Other than stack stubs the idea used to be just have it as open as possible.
These are just musings, and I know there are so many variables; twins are
different than fours etc., but it is fun to compare them all.
Cheers,
Rick
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