ddunbar wrote:

Hello Paul,
On the 15-5-2003 you posted a 13B curve showing the benefit of the
dynamic effect on the normal aspirated engine. What is the length
where the valve opening is placed.
Do you have a curve on the turbo engine as the primary runners are at
around 21" which has no valve to give a shorter length.
The secondary has the valve and the length is 14".
My question is how much variation in the curve would there be on the
turbo engine.



--
Best regards,
 ddunbar                          mailto:ddunbar@echidna.id.au

If I gave the impression the dynamic effect was beneficial for our use I gave the wrong
impression. It is not. 

To answer your question Mazda did not say in the SAE paper. 

No on the turbo HP curve availability but the 21 inch length with the dynamic effect
was chosen to improve the car engine torque at 2500-3000 RPM under modest boost levels
and to improve the BSFC at those same car cruise RPM levels. Total effective
runner length becomes 42 inches in that case.

My turbo system will use the 17 to 20 inch length WITH OUT
the dynamic effect to improve the BSFC under modest boost
levels during aircraft cruise around 5000 to 5500 RPM. 

Paul Lamar
 
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