Anyone with De-Cat and stock exhaust? - LotusTalk

Mad MaTTer · 11-02-2009, 08:27 PM

I have an NA 06 Elise and I thinking of a Larini de-cat but I read an old thread that someone tried a decat and it damaged their stock muffler? I dont see why a decat would damage a muffler.

anyone experience this?

Also,
I wanted to know your input based on sound vs stock.
did it get alot louder? Im thinking a decat + Stock will be quiter than with aftermarket exhaust.

did it add any drone in the cabin?

Did you feel any power gains/loss anywhere in the powerband?

thanks

EricH · 11-03-2009, 04:56 AM

Decat+stock muffler is much quieter than most aftermarket mufflers with a cat.

It is WAY quieter than cat+stage3 on an S car.

No drone. On my S car under full throttle outside you mostly hear the supercharger and don't really hear much exhaust. I think it is way too quiet, I was shocked removing the cat did not make more of a difference.

Overall the sound is better than stock, however it is still very stock-ish.

I think I felt some low end grunt go away, but the very top was a little stronger. I did not dyno before/after so I have no numbers to prove it.

azmurciev12 · 11-03-2009, 12:26 PM

this is what i am doing in about 2 weeks time. larini decat mated to the stock exhaust but i will have the Gotham tune. will let you know the results once it's done.

andrewgotanelise · 11-03-2009, 01:46 PM

I have a decat + stage 1 and it is my daily driver and it's great. When you are just putting around town its not that loud and no drone at all. Theres some nice gurgles and pops when you let off the gas. When you are WOT though, it sounds pretty mean especially with the supercharger and green filter. I highly recommend removing the cat even if you are in california like me

Mad MaTTer · 11-03-2009, 02:08 PM

Quote:

Originally Posted by azmurciev12

this is what i am doing in about 2 weeks time. larini decat mated to the stock exhaust but i will have the Gotham tune. will let you know the results once it's done.

Do you have a NA Elise or supercharged?
Im new here but those Charlie make a custom tune for mods?
Cause the only tune i see for an '06 NA elise is the lower Cam change.

11-02-2009, 08:27 PM	#1 (permalink)
Mad MaTTer Registered User Join Date: Jul 2009 Location: S.Fla Posts: 44	Anyone with De-Cat and stock exhaust? I have an NA 06 Elise and I thinking of a Larini de-cat but I read an old thread that someone tried a decat and it damaged their stock muffler? I dont see why a decat would damage a muffler. anyone experience this? Also, I wanted to know your input based on sound vs stock. did it get alot louder? Im thinking a decat + Stock will be quiter than with aftermarket exhaust. did it add any drone in the cabin? Did you feel any power gains/loss anywhere in the powerband? thanks

11-03-2009, 04:56 AM	#2 (permalink)
EricH Registered User Join Date: Nov 2007 Location: Dallas, Texas Posts: 621	Decat+stock muffler is much quieter than most aftermarket mufflers with a cat. It is WAY quieter than cat+stage3 on an S car. No drone. On my S car under full throttle outside you mostly hear the supercharger and don't really hear much exhaust. I think it is way too quiet, I was shocked removing the cat did not make more of a difference. Overall the sound is better than stock, however it is still very stock-ish. I think I felt some low end grunt go away, but the very top was a little stronger. I did not dyno before/after so I have no numbers to prove it. __________________ Click links to see my 2008 Lotus Exige-S 240 , '99 M3, 505rwhp '89 Mustang ( sold) , '05 WRX STI ( sold) homepages or here for my M3 vid (11MB)

11-03-2009, 01:46 PM	#4 (permalink)
andrewgotanelise MMA Fighter Join Date: Apr 2007 Location: Where the drugs are cheap and the girls are easy Posts: 1,208	I have a decat + stage 1 and it is my daily driver and it's great. When you are just putting around town its not that loud and no drone at all. Theres some nice gurgles and pops when you let off the gas. When you are WOT though, it sounds pretty mean especially with the supercharger and green filter. I highly recommend removing the cat even if you are in california like me __________________ 05 NFB Elise / Katana SC / No Snorkle / 3.2 "10" psi pulley / Stage 1 Exhaust / Decat / Green Filter

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11-03-2009, 12:26 PM	#3 (permalink)
azmurciev12 Registered User Join Date: Apr 2007 Posts: 120	this is what i am doing in about 2 weeks time. larini decat mated to the stock exhaust but i will have the Gotham tune. will let you know the results once it's done.

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