TRNW-2: 6L hp tuning

[Steve Everett]

  All the counties in the Metro Atlanta area have emission testing,  and I
know many of the shops in that area do turn off DOD,   I haven't heard of
any issues because of that

   Steve

On Mon, Nov 3, 2025 at 8:43 AM Chris and Cathy Kershaw via trnw2 <
trnw2 at trnw.net> wrote:

> Do you guys that tune tcc or dod ever have emissions testing issues? Our
> county doesn’t have emissions testing but next county over does, I’ve
> always wondered if they would fail it somehow.
>
> On Mon, Nov 3, 2025 at 8:25 AM Brett Karulak via trnw2 <trnw2 at trnw.net>
> wrote:
>
>> Thank you everyone for the responses.  I always inform my customers the
>> advantage to disable dod and most of mine already have a disabler plugged
>> into the dlc.  Im near San Antonio Texas and it seems most of these country
>> customers already know about the engine failures.  Most of these people
>> commute to SA so most put 30 to 60 miles one way to work.  They hit
>> terrible traffic once they get close to the city, its mostly small hills
>> and long stretches of some what flat roads. The reason i started tuning is
>> because i had one truck that had cheap mounts in it from AZ or Orielys and
>> after overhaul in dod you could feel that crap in the truck real bad, those
>> mounts suck, i always install oe mounts but since they just had another
>> shop put the aftermarkets in i fixed it turning off dod.  Then i had a
>> florida billet shudder out of the box, so i tuned it out.  then another
>> florida came back with a shudder, tuned that one out too.  I haven't bought
>> another florida since but installed at least 10 total but back to only pnh
>> billets, still never had a comeback of pnh, all units get either reamed tcc
>> reg, or zip kit and sometimes if bore is still good transgo valve.  I have
>> had success keeping dod at 20 rpms slip instead of 40, didn;t feel much.  I
>> typically don't mess with pressure.  When i zero tcc slip in V8 mode, it
>> will slip enough and bring it close to zero where i don't feel anything
>> abnormal and no complaints.  It will not hold zero slip like when you block
>> the valve in a 4l60e. I do agree though, small changes are a big difference.
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>
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