[Diy_efi] Exhaust Back pressure sensor

[Joe Macmurchie]

9 PSI of back pressure???? That's awful! Check for a potato in the exhaust
pipe....

-Joemac 

> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org 
> [mailto:diy_efi-bounces at diy-efi.org] On Behalf Of Dave Williams
> Sent: July 25, 2004 6:38 PM
> To: A list for Do-It-Yourself EFI
> Subject: Re: [Diy_efi] Exhaust Back pressure sensor
> 
> paul w wrote:
> 
> > Anyone know where I can buy an exhaust backpressure sensor 
> that I can 
> > feed into a data acquisition system?
> 
>   An ordinary 2-bar GM MAP sensor ought to work.  Drill a 
> 3/8" hole in the pipe, cross-thread in a 1/4" NPT to 1/8" 
> tubing compression fitting (mechanical oil pressure sender 
> fitting), then use at least a foot of 1/8" copper tubing or 
> brake line before you attach the rubber hose.
> 
>   Tyrannosaurus RX's mechanical gauge reads zero for normal 
> driving, and around 9 PSI at WOT, four barrel open, in the 
> 4000 RPM range.  Not bad for a 302 and single 2" exhaust.
> 
> --
> ===ronin at aristotle.net (Dave Williams)==============================
> == waiting, anticipating / for someone to save her soul / 
> well, I == == ain't no new Messiah / but I'm close enough for 
> rock and roll! == ============================= 
> http://www.bacomatic.org/~dw/index.htm
> 
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