[Supras] Fw: richness under boost

[Sean Cavanaugh]

--------------------------------------------------
From: "Sean Cavanaugh" <millenia2000 at hotmail.com>
Sent: Tuesday, November 06, 2007 12:20 PM
To: "Jim Jobe" <jjobe2 at supratech.org>
Subject: Re: [Supras] richness under boost

> those are the guys doing the full tuning only. I never said they used that 
> spot to run their car. the exhaust runner guys are the ones individually 
> tuning each cylinder so you don't get the condition that was mentioned in 
> the other email of having one cylinder being too rich or lean and throwing 
> out the collected reading.
>
> tune individually if possible so you get way more accurate readings when 
> you're using the stock location (or wherever else post-turbo you are 
> pulling your reading)
>
> -Sean
>
> --------------------------------------------------
> From: "Jim Jobe" <jjobe2 at supratech.org>
> Sent: Tuesday, November 06, 2007 11:45 AM
> To: "Sean Cavanaugh" <millenia2000 at hotmail.com>
> Cc: "Walker, Brian (Rich. Dist)" <Brian.Walker2 at VDOT.Virginia.gov>; 
> <Supras at supras.com>
> Subject: Re: [Supras] richness under boost
>
>>
>> Those that mount the sensor before the turbo, how are they
>> accounting for the new pressure differential between the
>> air it's reading and the air inside the cell?  Basically
>> what I've read is that's how not to use the sensor.
>>
>> On Tue, Nov 06, 2007 at 11:21:31AM -0500, Sean Cavanaugh wrote:
>>> Re: [Supras] richness under boostrx-7s pretty much ALWAYS have a 
>>> flamefront. heres a video of a pulled 13b motor running.
>>> http://www.youtube.com/watch?v=Wi8Qyr3IFRg
>>>
>>>  the heatsink adapter that Innovate makes works very well as that is 
>>> what my rx-7 friends are having to use for their wideband. 
>>> http://www.diyautotune.com/catalog/innovate-motorsports-hbx1-heatsink-bung-extender-p-73.html?osCsid=c6c12f9a698b80c73421e5188634b61d
>>>
>>> If it can last on an rx-7, it will last on a supra. and yes, to properly 
>>> tune a car with an o2 sensor, it has to be as close to engine as 
>>> possible. hardcore way would be to run one on each exhaust runner right 
>>> as it enters the manifold. Ive even seen some people fit one in the 
>>> manifold BEFORE the turbo in the collector area.
>>>
>>> another thing to note, the LC-1 isnt exactly the best wideband unit 
>>> either. friend has had to have his swapped at least 3 times (the 
>>> controller part, not the sensor) for issues. Most have flipped over to 
>>> using a TechEdge unit instead. its also way more compatible with 
>>> aftermarket ECUs (likeMegaSquirt) that can run in full closed loop mode.
>>>
>>> -Sean
>>>
>>>
>>> From: Walker, Brian (Rich. Dist)
>>> Sent: Tuesday, November 06, 2007 9:30 AM
>>> To: Millenia2000 at hotmail.com ; Supras at supras.com
>>> Subject: Re: [Supras] richness under boost
>>>
>>>
>>> Sean, this brings up some good info. I understand not wanting the sensor 
>>> in direct flame constantly as you mentioned but how will random flame 
>>> fronts effect the sensor? I would imagine most places in the DP are 
>>> going to see a flame fairly often. In fact this weekend at an event I 
>>> was told the car fired a large flame out of catback at one point. I also 
>>> recall last season when the old DP developed a hole (at the flex joint, 
>>> behind sensor location), flames were seen under the car many times.
>>>
>>> Still seems to be reading well (same readings I always see, with no 
>>> input changes) Sensor has been in for ~2.5 years.
>>> Brian
>>>
>>> Date: Mon, 5 Nov 2007 18:33:46 -0000
>>> From: "Sean Cavanaugh" <Millenia2000 at hotmail.com>
>>> Subject: Re: [Supras] richness under boost
>>> To: <supras at supras.com>
>>> Message-ID: <BAY126-DAV137B6C520834B7CFAB86DFCA880 at phx.gbl>
>>> Content-Type: text/plain;       charset="us-ascii"
>>>
>>> Just buy an Innovate LC-1 for 200 bucks and install it in stock O2 
>>> sensor location. Just having a wideband in the car helps out a LOT. My 
>>> old NA supra ran MUCH smoother just from that (used narrowband output 
>>> for ECU and wideband output for tuning). Whoever told you not to use 
>>> wideband O2 sensors for long periods of times must have been referring 
>>> to old obsolete non-heated sensors. Newer 5 wire wideband sensors are 
>>> heated and have no issues (unless you install it in an RX-7 where the 
>>> potential flamefront directly in the exhaust flow will melt it.)
>>>
>>> -Sean
>>> _______________________________________________
>>> Supras mailing list
>>> Supras at supras.com
>>> http://supras.com/mailman/listinfo/supras_supras.com
>>
>