> My own car, which would benefit from downpipes et al. for power, will NOT
> show an increase in boost from the reduction in back pressure. Mine's
> mechanically limited by the pressure seen at the compressor outlet
> (vacuum/pressure line to the boost control sensor, which in turn is a
> mechanical, not electronic, device, as to boost levels).
>
> It competes (if that's what the kids are calling it now) in ESP, and at
> least here I'm not aware that ANY turbocars are dominating (or even doing
> well) in this class.
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The MK3 Supra (87-92) will show a 1-1.5psi increase in manifold
delivered boost even though we have a mechanically driven wastegate...simply
because the thermal efficiency of the turbo is greater with the decreased
backpressure. This results in a cooler more dense intake charge.
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