Does your exhaust choke your engine?

[Hog]

Originally Posted by -=Jeff=-

That is a matter of personal preference, I think. my 89 was not bad, but I have cats on my 90 Z

You can always use gasoline that smells very attractive, Eau de Octane is a very enticing fragrance.

My Uncle has a US code Ferrari Testarossa, when our Province used the California style dyno sniffer test. he would take his car to a "guy" who installed cats and ran it through the cycle, thus passing. This would get his sticker for 2 years. Then we went to the OBD2 port testing and just uses a "cheater pipe". Not sure if he is running the non-cat European ECM calibration or not.

Not sure if it's an actual emission that makes that offputting smell or not.


Carbon Dioxide-CO2
Part 1 of a 3 way catalyst
CO2 is odourless, tasteless and is a greenhouse gas, allowing solar radiation to hit the Earths surface where the radiation heats the surface of the Earth, the surface then heats the air causing convection currents. Higher CO2 concentrations prevents the escape of thermal energy from the planet.


Oxides of Nitrogen-NOx Part 2
Oxides of Nitrogen is a blanket for many compounds
Nitric oxide, also known as nitrogen monoxide, (NO), nitrogen(II) oxide
Nitrogen dioxide (NO2), nitrogen(IV) oxide
Nitrous oxide (N2O), nitrogen(-I,III) oxide
Nitrosylazide (N4O), nitrogen(-I,0,I,II) oxide
Nitrate radical (NO3), nitrogen(VI) oxide
Dinitrogen trioxide (N2O3), nitrogen(II,IV) oxide
Dinitrogen tetroxide (N2O4), nitrogen(IV) oxide
Dinitrogen pentoxide (N2O5), nitrogen(V) oxide
Trinitramide (N(NO2)3), nitrogen(0,IV) oxide


Hydrocarbons
And the last part of a 3 way cat, the Hydrocarbons, perhaps its the burned or partially burned hydrocarbons that give off that smell.

I found this little ditty about Hydrocarbon emission classification(wiki)
Technology for one application (to meet a non-methane hydrocarbon standard) may not be suitable for use in an application that has to meet a total hydrocarbon standard. Methane is not directly toxic, but is more difficult to break down in a catalytic converter, so in effect a "non-methane hydrocarbon" regulation can be considered easier to meet. Since methane is a greenhouse gas, interest is rising in how to eliminate emissions of it.


I remember in about 91-94 the GM TBI(throttle body injection) engines used catalytic converters which caused a strong "rotten eggs" smell. That indicates some sort of Hydrogen Sulphide (H2S).

Did any of the ZR-1's suffer from any "rotten eggs" smells?

[Bob Eyres]

Am I deaf? Not yet. Like ancient Odysseus, I strap myself in and enjoy the siren song of the screaming LT5.

The wife hates the loud pipes. But I just tell her,"plug in your ear buds" and hang on

Does it smell bad? No really noxious fumes, but it does smell like a Twentieth Century Beast, like the drag strip, like "Victory"

Seriously though, there is one downside. Because my car is white, it does, over time, leave a barely noticeable unsightly yellow stain over the entire rear end. Which takes a lot of rubbing to remove.

You know how we hate unsightly yellow stains on our rear ends.

[WARP TEN]

Originally Posted by Bob Eyres

Am I deaf? Not yet. Like ancient Odysseus, I strap myself in and enjoy the siren song of the screaming LT5.

The wife hates the loud pipes. But I just tell her,"plug in your ear buds" and hang on

Does it smell bad? No really noxious fumes, but it does smell like a Twentieth Century Beast, like the drag strip, like "Victory"

Seriously though, there is one downside. Because my car is white, it does, over time, leave a barely noticeable unsightly yellow stain over the entire rear end. Which takes a lot of rubbing to remove.

You know how we hate unsightly yellow stains on our rear ends.

I have been reading lately about a product called Rejex that a few have mentioned on this forum. You might try that after a good cleaning. It looks interesting on their website. Haven't used it yet but it might make future stains easier to remove. - Bob

[gbrtng]

Originally Posted by LGAFF

I guess, check out the difference in top speed on a 415

This 1995 ‪#‎Corvette‬ ZR-1 415 CID LT5 was featured in the August 1998 Issue of Road & Track, that was John Lingenfelter’s yellow 1995 ZR-1 for the top speed shootout. Mario Andretti drove all of the cars at the Fort Stockton test track and Lingenfelter's yellow ZR-1 ran 201.5 MPH with full exhaust and 218.1 MPH on open headers. This 415 CID LT5 produced 686 HP and is normally aspirated. The 1995 Corvette ZR1 415 CID is owned by Norm Koerner

I have it on good authority the engine is a different car now having passed thru SW and another owner.