Hybrid Car – More Fun with Less Gas

better mileage with higher octane? - Page 19

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Posted by Bruce Richmond on January 7, 2007, 4:45 am

Steve wrote:

Some how I just can't see a circle track racer saying. "We can get
along fine with less power."  Even if some were to take that aproach in
the interest of reliability, I am sure some would have opted for dual
quads if they were allowed.  There's no question they were a factory
item.  And there is still the matter of the Fords being allowed to run
dual quads which were not stock.

Posted by Steve on January 7, 2007, 9:23 pm

Bruce Richmond wrote:

Well, that also begs the old question of whether a dual-quad *really*
makes more power than a well-tuned big single on the same engine, too.

Posted by clare at snyder.on.ca on January 8, 2007, 1:40 am

Depends on a lot of factors. And depends where you want the power. The
single will likely give better throttle response, so make a better
short track car (or roundy-round) where the dual quads will shine at
full throttle high revs - like a floor-it-and-go dragster.

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Posted by Bruce Richmond on January 8, 2007, 3:17 am

clare wrote:

IMO circle track racers operate in a narrower rpm range than a
dragster.  And on tracks like Daytona the pedal stays planted most of
the time, so response isn't a problem.

Another factor is that back when we were talking about they didn't have
the huge carbs they did later.  The dual-quads made more power because
they provided the most veturi area.

Posted by Steve on January 8, 2007, 3:58 pm

Bruce Richmond wrote:

True at Daytona *today*, but I kinda doubt that they ran wide open
through the turns back in the big-block engine, skinny tire, no aero
downforce days of the 60s even at Daytona.  I wish they still ran that
way, the racing at Daytona and Talledega today is more boring than
watching grass grow.

That's certainly true. The dual quads on the old cross-ram 413s were
only good for about 400 to 500 CFM  each at best.

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