I thought that same thing at first...since I now have one on my truck, it
really doesn't interrupt the airflow at all...performance is the same with
it ON (and not operational) as with it OFF the truck.
The variable flow is also a question I had asked Mark Kibort (part owner of
eRacing) but the boost level would be too low and would also burn the motor
out quicker than with it only operating at WOT. (Average lifespan is about
60K miles + or - 10,000.)
I'l be at the Austin meet this weekend with the eRam installed if anyone is
interested to take a look and see what it does.
Bernd
At 04:04 PM 07/14/1999 -0400, you wrote:
>My question is this. Wouldn't the e-ram when the vehicle is not at wot
restrict
>airflow? I've seen the pics on the web page and the fan blades are large
and it
>seens that it would restrict airflow. It seems you would start reducing the
>airflow back towards the point of the stock air intake. It seems that the
e-ram
>would work better if it was a variable device that accelerated as the vehicle
>accelerated. When the throttle body opens up more the e-ram speeds up
therefore
>pushing more air at the appropriate times, not just at wot. I like the
idea and
>have been very curious but was wondering about this. Not flaming or
discounting
>the idea just covering all of the bases.
>
>Jeff Durling
>'96 RC Sport
>
>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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