Exhaust question

[hlw3]

What happens if your take the stock pipes off and remove the cat, and then put the bypass and TORs on without changing the tune in the ECU?

Thanks.

-trey

[Aussiebikerdave]

You make more noise and wake the butcher's dog! davo

[RidinSunshine]

On 2006-04-27 04:44, Aussiebikerdave wrote:
You make more noise and wake the butcher's dog! davo

:lollol: :roflmoa2:

[Disco]

Yeah, you'll backfire a bit without the tune... and you'll backfire a bit with the tune.

I didn't see much difference and might not have done the re-tune. I'd saved the $50 the dealer charges.

[drtim]

If you install the cat-bypass and TORs without a richer tune your taking a chance of running the engine lean and doing damage. Lean burn engines run hot.
I had 3 K&Ns, cat-bypass and TORs with the 20056 tune. When dynoed, I was informed by the tech I was on the lean danger line. If I installed the richest tune, 20054, I would have been OK.
At least find a dealer with an exhaust sniffer unit that will detect the fuel/air mix and have it checked. If your cooling fan comes on often that is also an indicator. So is a gowing red exhaust manifold.
50 bucks for a richer tune is a lot cheaper than a blown engine.

[SteveRed]

I would say you would be best served by putting on a Tuneboy modified tune and you will really be getting the best out of your bike with the new set up!