Aerochargers etc: real back pressure numbers

[Bruce]

Any.
The whole *trick* in a street turbo car is the lack of back pressure.   I
have about 9' of 3" pipe, and two straight thur mufflers (1-9", and 1-14").
Turbo knocks the noise level down some (well smoothes out the engines bark).
Things like Flowmasters, where they redirect the flow, or tamper with the
exhaust energy mess up performance.   The Ultraflows, and ATR Pit bulls are
the muffler of choice in the GN world.  I run one of each and couldn't be
happier
Bruce


----- Original Message -----
From: "Walter Sherwin" <wsherwin at home.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, October 16, 2001 5:47 PM
Subject: Re: Aerochargers etc: real back pressure numbers


>
> > 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.
>
> --------------------------------------------------------------------------
--
> 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
>
>

----------------------------------------------------------------------------
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