<VV> two two-barrels

[jwcorvair at aol.com]

 True, even old efi systems can work much better than carbs, particularly in a system where the carbs are old and were not originally intended for performance. These carbs are not much more sophisticated than our HVs, two throats instead of one. These carbs were pretty common on quite a few GM vehicles, everything from Vegas to Firebirds - just about anything that had a small engine requiring minimal carburation. Several sites offer information about tuning the 2CGs for racing, which is not the same as for the street. The ubiquitous nature of these carbs got me wondering if anyone had played with them.

Now, back to our regularly scheduled thread about anitsneeze.

Joe

 

 

-----Original Message-----
From: mike & bev mann <vair65 at sisna.com>
To: Sethracer <Sethracer at aol.com>
Cc: virtualvairs <virtualvairs at corvair.org>; FrankCB <FrankCB at aol.com>
Sent: Tue, Mar 19, 2013 9:11 am
Subject: Re: <VV> two two-barrels


On 3/18/13, Sethracer at aol.com <Sethracer at aol.com> wrote:
> How about a pair of TWM throttle bodies - replacing IDA  Weber 2-barrels -
> non-progressive down draft models, with an EFI system to  limit the
> air-speed damage of opening all throttle bodies together? Both a  throttle
> position
> sensor and a mass airflow feed could be used. Hmmm. -  Seth
>
which is why i like my old (1986) aftermarket efi system which uses a
center mount 4 barrel throttle body with 4 injectors and a air mass
sensor on a turboed 140. the air flowing past the "hot wire" in the
sensor controls the amount of fuel delivery. off of boost the delivery
rate is much smaller than when on boost and it's all done
automatically. while ic's and etc are much better than the resistors
and capacitors that i have in the ecu it still works. there is a
slight delay in the transition from off to on boost according to the
fast monitoring system we use it's not long enough to cause a lot of
harm and much faster than a water injection system can react. the
throttle body openings are non progressive which doesn't seem to hurt
a thing as the total fuel requirement is set by the amount of air
going thru the air mass sensor-mike mann
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