I Have Given Up On Elio, Have You?

[RSchneider]

The turbo softens and directs the sound waves/gas flow in one direction so there is less noise.
Backfiring when red line shifting indicated the mixture is too rich. The cat is igniting the rich mixture in the exhaust system at that time..
I assume he also has a BOV valve on the turbo?

I asked him and it has a BOV. Fiat calls it a purge valve. We looked at it and it's made by Pierburg. The PN shows it's on all of them and including the non Abarth turbo version. I found out my VW Alltrack has a Pierburg Blow Off valve. My wifes CRV had a blow off valve but it's called an air bypass valve. In the end, they all do the same thing. According to him, they all do this from the factory. So it was designed to do that.

As for the sound, I am still amazed it has no muffler at all. I understand about the turbo but my two other turbo cars have mufflers and resonators. One is a 1.5l 4 cyl, the other is a 1.8. The Abarth is a 1.4l.

 

[Aufgeblassen]

I asked him and it has a BOV. Fiat calls it a purge valve. We looked at it and it's made by Pierburg. The PN shows it's on all of them and including the non Abarth turbo version. I found out my VW Alltrack has a Pierburg Blow Off valve. My wifes CRV had a blow off valve but it's called an air bypass valve. In the end, they all do the same thing. According to him, they all do this from the factory. So it was designed to do that.

As for the sound, I am still amazed it has no muffler at all. I understand about the tno louderurbo but my two other turbo cars have mufflers and resonators. One is a 1.5l 4 cyl, the other is a 1.8. The Abarth is a 1.4l.

On my 1998 Jetta TDI (turbo diesel), I put an exhaust bypass valve that bypassed the muffler, and it was absolutely NO louder at all w/o muffler. Was a waste of money by VW to have one.

 

[W. WIllie]

Mufflers and resonators and cats are for emissions and regulated by the govt.
Now days they even have "Cat Fluid" for the diesels.

 

[Aufgeblassen]

Mufflers and resonators and cats are for emissions and regulated by the govt.
Now days they even have "Cat Fluid" for the diesels.

It is not for the CC, rather just to lower exhaust NOX.

 

[RSchneider]

On my 1998 Jetta TDI (turbo diesel), I put an exhaust bypass valve that bypassed the muffler, and it was absolutely NO louder at all w/o muffler. Was a waste of money by VW to have one.

I had a 2000 Jetta TDI and when the exhaust rusted out I replaced the whole thing with one that had just a single small muffler on it and no CAT. It was too loud and I put on another bigger muffler to quiet it down. Even at that it sounded like a truck with the whistle from the turbo.

 

[W. WIllie]

The "Whistle" you are relating to is the BOV doing it's job.

 

[RSchneider]

The "Whistle" you are relating to is the BOV doing it's job.

The TDI I had does not have a BOV as there would be no way for it to work as there's no throttle in the intake. Thus when you let up on the throttle, it cuts the fuel, that's all. So on my TDI, was a VNT (Variable Nozzle Turbo). It had a vacuum pod on it that changed the nozzle size. That vacuum pod was hooked up to a valve (which goes bad on many of them). All it does is regulate the boost (which is around 20 psi on the model I had). The whistle was the sound of the turbo.

 

[DikiJ]

Every few months I get an an email from this group saying just how you've missed me and I log in to see if I've missed anything. Nothing changes; same folks with the Pollyanna attitude singing "The Sun'll Come Out Tomorrow". I haven't received any communication from Elio in a few years it seems. I'm an early "all-in" guy. I still *need* an Elio but I stopped investing any consciousness into what is obviously a dead horse long ago. What puzzles me is why this page persists.

I'm here for Coss's jokes.

 

[Coss]

I'll continue so as not to disappoint you. Glad you enjoy them.

 

[Sethodine]

I am still sad about this.