Flowmaster BP

[Clarence L.Snyder]

David Piper wrote:
> 
> Just determined where most of the exh back press is from on my 400 HP 280 Z
> custom turbo.  Has 7.5 psi at turbine oulet S pipe and 6.3 psi at 2 chamber
> Flowmaster.  Anyone recommend a good, low backpress muffler for a turbo?
> Doesn't have to that quiet, since turbo muffles some.
> 
> Was afraid to turn up the boost more than 18 with all that BP.  Using 45 pph
> Bosche -036 inj and old Air Sensors analog box.  Trying for 450 HP at 23
> psi.  Think its time to go digital.  Well, lets see; there's DFI, Haltech,
> Electromotive Felpro and Motec.  Decisions, decisions.  If anyone has
> personal experience with any of these or others, please advise privately.
> 
> TNX
> 
> TurboDave
Get a pair of mufflers from an old CornBinder (IH) Scout. 2 1/2" in and
out, virtually straight through. Or use the rear muffler (resonator)
from a mid-70s T Bird big-block. Same set-up. Used them on the old Colt
and a few other vehicles with good results.