[Diy_efi] traction control & nitrous (devlish combo?)

[The McConnell's]

well, im confident my sources are accurate, but none of this was really my
point anyway and doesnt have anything to do with efi, so im dropping it.  i
couldnt care less about what everyones opinion is on what makes a car
different.

> > the point of the matter is there is very little difference
> > between the road wrx and the wrc wrx.
>
> Your point is very wrong. There is actually very little in common between
> those two cars except the brand name and overall external shape. The
> original Impreza bodyshell goes through 750 hours of work before it become
a
> WRC bodyshell, the entire powertrain and drivetrain are specific so are
the
> electronics and just about everything else. I think it's safer to count
the
> parts actually retained, unmodified, from the street car and they are the
> rear lights, the windshields & side windows, the subaru logo and that's
> about it, everything else is either completely replaced (like all
> transmission, brakes and suspension components) or heavily modified like
the
> engine and the bodyshell itself, the track is vastly widened and
suspension
> travel is more than doubled, which require heavy modifications of the
shell
> itself. On the Impreza WRC the front of the car, from the base of the
> windshield, is simply cut off and rebuilt from scratch. Everything is
built
> in such a way the individual parts or sometime entire assemblies are
easily
> replaceable in the field, for example it takes only about 6 to 7 minutes
to
> change the entire front drivetrain, including re-setting the suspension
> geometry and wheel alignment, about 4 minutes to change all four shock
> absorbers & spring and 16-17 minutes to swap the gearbox, if fact the car
is
> built in such a way that everything, save the engine and bodyshell, can be
> replaced in less than the 20 mn allowed to service the car at specific
> points during the rally. The electronics are very comparable to those
found
> in F1 cars, including very sophisticated data aquisition systems from Pi
> Research (www.piresearch.com), control systems for the electro-hydraulic
> gearbox and diffs (www.xtrac.com), active anti-roll bars, sophisticated
> engine management including 4WD traction control, launch strategies,
> anti-lag etc. As a matter of fact some World Rally Cars are using the
> Marelli STEP9 ECU which is actually an F1 ECU
> (www.marelli.it/racing/products.htm), others are using the Pectel T10S
> (www.pectel.co.uk/products/t10s) which, alone, costs about 20K US. The
XTrac
> 240 gearbox with its clutch and integral central and front diffs (or
> team-designed derivatives) used on all current World Rally Cars costs in
> excess of 120K US, a turbo costs around 20K US (like for example the
TR30R).
> That's a very long way from the car in the showroom next door, in fact
there
> is a whole industry behind those cars and they represent the ultimate in
> motorsport sophistication right next to F1 and well beyond everything
else.
>
> The manufacturer's marketing trick is to make you believe your street
> Impreza WRX, Focus RS or 206 GTi  is close if not similar to the works
cars,
> and they apparently succeeded, but nothing is further away from the
thruth.
>
> Cheers,
> Axel
>
>
>
>
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>


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