Aerochargers etc: real back pressure numbers

[Greg Hermann]

At 2:47 PM 10/16/01, Walter Sherwin wrote:
>> Being curious and since I was allready using a 12 channel datalogger and
>> wb NTK to tune the Typhoon I had just purchased with its new Garrett
>> TE-60 turbo, I instrumented the TY with pressure sensors and EGT probes
>> to measure back pressure before the turbo and manifold (boost) pressure
>> as well as egt before and after the turbo.
>>
>
>
>Insightful info.  Thanks.  I am curious as to whether you had an exhaust
>system downstream of the turbine in your TY during those tests (ie: piping,
>converter, muffler), and whether you data logged the EBP at the turbine
>discharge?  Anyone else ever measure this type of thing?  I know this is
>going to sound rather vague, but, what's an acceptable value for post
>turbine EBP in a street car before seriously impacting a turbo's capability?
>
>Walt.

No numbers here to give you, but any significant amount of EBP downstream
is going to hurt, since the turbine performs based on the absolute pressure
ratio across it.

I was hoping Frank had those downstream EBP numbers, too !

Greg


----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org