OK I'm going to try and ask/explain this as best as possible but it may
get confusing. Our trucks w/o ram air are running on a vacuum correct?
On the 300ZX TT's at work, you can feel a power increase when the boost
gauge is at or even just under zero boost (this is over non turbo
models). They have to lower the vacuum before the can give boost and
just doing this adds power. Even if a ram air isn't providing boost it
is still raising power by lowering vacuum correct? Just trying to figure
out if it is possible for the E-RAM to provide double the power gain
over a ram air given that the E-RAM is pushing 1 psi and the ram air is
pushing .5 psi. Or do you have to take into account the power increase
of lowering vacuum? Am I making any sense to anyone?
Erich
Bernd D. Ratsch wrote:
>
> Since we've all been talking about RamAIR, Cool Air Systems, etc...here's
> something interesting for you all....
>
> Just let them know of the basic formula for ram air. It is little known and
> generally misunderstood.
>
> Max ram at 80 mph is .08psi. max ram at 180 mph is .4psi (thats point 4
> psi !!) This is with a 75% efficient inlet like on a dragster, that you
> would never have with your daily truck/car. (Try 25 to 50% , best
> case!!)
>
> You can't get around physics, everyone tries. Anyway, this is right out of
> Carroll Smith's "Tune to Win" racing book, as well as a basic known fact in
> aerodynamics. (kind of easy to calculate.)
>
> No matter what the shape of the inlet , (funnel, scoop, horn, etc) it
> doesn't matter, ram just does not exist for our cars.
>
> This is where the eRAM comes into play. It just takes unused electrical energy
> in the battery, and creates a 200 mph ram air system (at WOT).
>
> Ps . here is the formula for ram potential:
> Air Density in lbs per cubic foot
> X Velocity in feet per sec squared divided by 288X32.2 (all times the
> efficiency factor)
>
> Group buy anyone??? ;)
>
> Bernd
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