[Diy_efi] Can constant WOT operation destroy a muffler?

[Keith Varin]

I'm thinking you might wanna try going with a better gear ratio for those
huge tires that youve got on there. If I ran my car at WOT all the time i'd
be a bit more worried about the engine itself instead of the muffler!

On 6/14/06, Jim Butterfield <jimbutterfield at yahoo.com> wrote:
>
> Hello Andy,
>   There are a few of us in our club that have cars only for racing... and
> that means WOT for `1/4 strip... none of our mufflers wear out... have your
> good supports on the exhaust system???
>
>   jim
>
>
> Andy Harvilla <higrafey at gmail.com> wrote:
>   Hey guys,
>
> I have an unusual "problem" (if you can even call it that) with my
> Jeep Wrangler that I think can be attributed to near-constant WOT
> operation. Every year, no joke, I have to install a new muffler on
> my Jeep because the old one cracks underneath in exactly the same
> spot. Even after only a few hundred miles of use, you can see the
> metal casing begin to warp and swell, presumably from high heat.
>
> It occurred to me that this might be happening because of the way I
> drive the vehicle. The little four-cylinder engine has no power
> (considering the 33-inch tires it's pushing) and I'm nearly always at
> full-throttle just to get the sucker to move... going up hills,
> highway driving, etc. Do you think the computer is enabling WOT mode
> and richening up the mixture, which in turn heats up the catalytic
> converter and slowly melts the muffler? There's always a constant
> rich smell and the tailpipe is usually black. I had to install a cat
> due to inspection reasons (the previous owner hollowed it out), but
> before then, I never had an issue with mufflers blowing out. It
> seems like the converter might be the root of the problem. One of my
> friends owns a Wrangler, drives it the same way, and also replaces
> mufflers annually. We always thought it was "just a Jeep thing"... :-)
>
> Andy
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-- 
Keith Varin