TRNW-2: 6L hp tuning

[Tod Chretien]

 >Do you guys that tune tcc or dod ever have emissions testing issues?

I will know next year when I have to get my truck tested. If they fail 
it, I can easily just turn it back on. I might just turn it back on 
before taking it in for the test, but then we won't know the answer to 
your question.

Tod

On 11/3/2025 5:42 AM, Chris and Cathy Kershaw via trnw2 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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-- 
Best Regards,
Tod Chretien
TRNW Inc.
https://www.trnw.net
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