Unintended Acceleration - really happens

John Cody Forbes cody at 5000tq.com
Mon Aug 7 22:18:23 EDT 2006


Doug Johnson wrote:
> So, tell me, Cody:  If the car slows down because you brake with your
> left foot, and the engine consequently slows, and the exhaust gas
> flow is reduced because of the engine slowing; how in Gawd's name do
> you keep the boost up by left-foot braking????  *LMAO*
>
> ~ Doug

Well this is a technique that many many rally drivers use as well as Hurley 
Haywood and Hans Stuck (both of whom I have met on numerous occasions, Hans 
is a family friend) used in the Audi's from the Trans Am and IMSA series, so 
it's not just me you are laughing at.

The boost is kept up because at WOT my car develops over 1bar of boost 
anywhere over about 2500rpm. If I'm entering a corner where I can stay in 
the same gear and keep the rev's over about 4,000rpm then I like to left 
foot brake and hold the boost. It's especially good in high speed chicanes 
where I would just need to maintain speed for a short time rather then gain 
velocity.

-Cody 



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