Do It Sidewayz Wrote:
-------------------------------------------------------
> Practically speaking....WHY DO YOU CARE??
>
>
> Have you ever been to a Dyno, and the operator
> will stick the wideband sniffer in the tailpipe??
> i've personally asked the question, and been
> proven the results. Their response is that at
> WOT, the cat does nothing, actual readings were
> off like 0.1. We had a wideband sensor before any
> cats, and the dyno sniffer a the tail pipe...as i
> said results were like 0.1 difference.
>

I've been to dyno's that will do sniffers and others that will only do pre-cat sensing. not really important. if I have to have it I'd like it to work. and because my car goes through state inspection; have to have a cat and muffler.

NoCoast Wrote:
-------------------------------------------------------
>At tech they check your sound level.
>In post-event scrutineering is where they'd check a cat. Just make sure you have >a sawzall if needed to get to the cat.

sawzall ready. if it crunches when I wack it with a hammer, will that do.

---

-KTurner
Stomp down on the exhilarator and hold on to the wheel.

What i'm trying to say is...

"work" is a relative term.

---

Chris

Do It Sidewayz Wrote:
-------------------------------------------------------
> What i'm trying to say is...
>
> "work" is a relative term.
> Chris

understand

---

-KTurner
Stomp down on the exhilarator and hold on to the wheel.

Brian,

You did not and still have not made it clear what the intent of your qestion was. I don't know. If you were wanting help to cheat, my origional post stands. If I misunderstood your question I apologize and am sorry for it. Please make it clear.

Robert.

---

Robert.

"You are way too normal to be on Rally Anarchy." Eddie Fiorelli.

No need to cheat---the rule still doesn't say __where__ it has to be installed. If anything it makes it easier to bypass the spirit of the rule as now the only functionality check is that the grid is visible. Of course the grid is visible, the cat is conveniently _installed_ in the trunk of the car so the scrutineers can get to it easily without having to even place a knee on the ground.......

---

____________________________________________________________-

One. Class -- 2WD

www.quantumrallysport.com

http://www.facebook.com/home.php?#/pages/Quantum-Rally-Sport/281129179600?ref=nf

Do It Sidewayz Wrote:
-------------------------------------------------------
> KTurner Wrote:
> --------------------------------------------------
> -----
> > will cats moved to the end of the exhaust
> stream
> > even get hot enough to function properly?
>
>
> Practically speaking....WHY DO YOU CARE??


some peoples rally cars need to pass DEQ to be plated so they are rally legal.

seems like you could have a bit of a catch-22 with this rule. cat in the back meets RA rules, but doesn't pass DEQ. cat in the OEM spot passes DEQ but doesn't meet rally rules.

Cat in the OE location meets the rules, but just hard to inspect. If i put mine in the OE location, I would just weld an O2 bung right at the outlet with a cap so you could pull the cap and shine a light in. I think I will just put it at the back.

I would rather see the inspection hole at the front. Then if the strata was starting to melt I could see it.

brianallmotor Wrote:
-------------------------------------------------------
> How does one fake the heat difference check ???

Paint the front half of the cat a nice shiny white.

Paint the back half a nice matte black.

(And obviously make sure it's clean when it's checked.)

I forget the magnitude of this when I tested it on just a piece of exhaust pipe, but it was 3-8 degrees different, which I think met the rule at the time. (Used to be "any measurable" or some such" I don't know that it would do "5%" if that's the rule for last year.

"But Anders!" you cry "Paint isn't an insulator! There's no way that could work!"

"Exactly." say Anders "And that's why your cheat-fu is so weak."

http://en.wikipedia.org/wiki/Black_body

I'm sure there's other ways too, like ceramic coating half of the inside (now that actually _could_ insulate).

Anders

---

Grassroots rally. It's what I think about.

Rallymech Wrote:
-------------------------------------------------------
> Brian,
>
> You did not and still have not made it clear what
> the intent of your question was. If I misunderstood
> your question I apologize and am sorry for it.
>Please make it clear.

Apology accepted Robert. thank you.