[DeTomaso] Techno Question: Bung placement on headers for A/F sensor

Dave Londry davel at emspace.com
Mon Aug 18 00:38:32 EDT 2014


Sorry - that was unclear Chuck.
The farther the sensor is from the exhaust outlets, the lower the 
low-rpm limit at which you can read A/F.

The lower the rpm, the farther the exhaust reversions travel back up the 
pipes.
(More time to travel and less opposing gas velocity)
dave

On 17/08/2014 6:55 PM, Charles Engles wrote:
> Dear Dave,
>
>
>            So to rephrase what you said (which is very interesting), the
> further down the exhaust the better the sensor reads and reads at lower
> rpms.   Therefore, the best point is as far back as possible, i.e. just
> before the muffler?
>
>           I have read that the Innovate is supposed to be the fastest
> sampling or testing unit.  Does that have any bearing on your recommendation
> for a bung further down the exhaust pipe to obtain better readings?
>
>
>                            Warmest regards,  Chuck Engles
>
>
>
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of doug351c
> Sent: Sunday, August 17, 2014 3:17 PM
> To: Dave Londry; detomaso at poca.com
> Subject: Re: [DeTomaso] Techno Question: Bung placement on headers for A/F
> sensor
>
> Dave,
>
> By "outlet" do you mean header collector flange?
>
> Doug Braun
> blue 73L #5505
>
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at poca.com]On Behalf Of Dave Londry
> Sent: Sunday, August 17, 2014 1:05 PM
> To: detomaso at poca.com
> Subject: Re: [DeTomaso] Techno Question: Bung placement on headers for A/F
> sensor
>
>
> That is good stuff Chuck and giving all that info first priority,
>    the farther you are from the outlet - the lower the rpm at which you'll
> get stable A/F readings.
> The reversions in our short exhaust systems are really fierce.
> Below about 1700 rpm I get nothing but crap.
> dave
>
>
> On 17/08/2014 12:03 PM, Charles Engles wrote:
>>      Dear SOBill, Jerry, Asa and Mike
>>
>>
>>
>>                          Great minds think alike and experience makes the
>>      optimal location so much easier to pinpoint.   Thanks!
>>
>>
>>
>>                                          Warmest regards,  Chuck Engles
>>
>>
>>      From: SOBill at aol.com [mailto:SOBill at aol.com]
>>      Sent: Sunday, August 17, 2014 12:02 PM
>>      To: cengles at cox.net; detomaso at poca.com
>>      Subject: Re: [DeTomaso] Techno Question: Bung placement on headers for
>>      A/F sensor
>>
>>
>>      Chuck,
>>
>>
>>      The bung should be mounted at the 12 o'clock position so condensation
>>      does get to the sensor on startup.
>>
>>
>>      I welded mine on the exhaust pipe just after the collector because my
>>      engine was in the car and I could easily remove the exhaust pipe to do
>>      the welding.
>>
>>
>>      SOBill
>>
>>
>>      The main thing is to keep the main thing the main thing.
>>      Do the best you can with what your have where you are.
>>      Have fun today!
>>      SOBill
>>
>>
>>      In a message dated 8/17/2014 8:57:41 A.M. Pacific Daylight Time,
>>      [1]cengles at cox.net writes:
>>
>>        Dear Forum,
>>                            I will soon have both engines out of both
>>        Panteras for
>>        work.  It dawned on me that this would be a good time to add a bung
>>        on the
>>        headers for use with and A/F meter sensor.    I have an email sent
>>        to
>>        Innovate for their recommendations, but it is the weekend.    I
>>        assume that
>>        the bung should be welded into the end of the header collector.
>>                            Does anyone have knowledge of the optimal spot
>>        to put
>>        the bung?
>>                                                     Warmest regards, Chuck
>>        Engles
>>           Dear Forum,
>>                               I will soon have both engines out of both
>>        Panteras
>>           for work.  It dawned on me that this would be a good time to add
>>        a bung
>>           on the headers for use with and A/F meter sensor.    I have an
>>        email
>>           sent to Innovate for their recommendations, but it is the
>>        weekend.    I
>>           assume that the bung should be welded into the end of the header
>>           collector.
>>                               Does anyone have knowledge of the optimal
>>        spot to
>>           put the bung?
>>                                                        Warmest regards,
>>        Chuck
>>           Engles
>>        _______________________________________________
>>        Detomaso Forum Managed by POCA
>>        DeTomaso mailing list
>>        [2]DeTomaso at poca.com
>>        [3]http://poca.com/mailman/listinfo/detomaso_poca.com
>>
>> References
>>
>>      1. mailto:cengles at cox.net
>>      2. mailto:DeTomaso at poca.com
>>      3. http://poca.com/mailman/listinfo/detomaso_poca.com
>>
>>
>>
>> _______________________________________________
>>
>> Detomaso Forum Managed by POCA
>>
>> DeTomaso mailing list
>> DeTomaso at poca.com
>> http://poca.com/mailman/listinfo/detomaso_poca.com
>
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> DeTomaso mailing list
> DeTomaso at poca.com
> http://poca.com/mailman/listinfo/detomaso_poca.com
>
>
>





More information about the DeTomaso mailing list