Tune Out Straight Pipe Exhaust Smell?

[1000AWHP]

I was just wondering if it is possible to tune out the smell of straight pipe exhaust fumes? I am running Power FC is there any way I can do it myself?

Thanks

[R31Nismoid]

Tune out the smell of exhaust?

Oh dear...

[PM-R33]

[mystery_kid]

that's a new one

[joeyjoejoejuniorshabadoo]

actually there is a way....

you can jam your power FC into the exhaust so that it catches the smell

[Moodles2]

Redirect the exhaust flow to pass through the charcoal canister first? Though you would probably introduce some backpressure via 10mm hoses to the canister itself and negate the straight pipe.

[Joe_89]

Redirect the exhaust flow to pass through the charcoal canister first? Though you would probably introduce some backpressure via 10mm hoses to the canister itself and negate the straight pipe.

And then into the passenger cabin

[1000AWHP]

just wondering.. I like the enthusiasm and team effort. I heard a few EVO owners doing this. I was just wondering if it was possible on the RB.

[R31Nismoid]

Dude, you can't.

Exhaust is a by product of burning fuel.

[GTScotT]

he wants to tune out the smell from a decat exhaust.

the only way to do that is by changing the mixtures, which would alter the motors tune etc. not advisable.

if you want to run decat you will need to wear the risk of $15,000. pretty much end of story.

otherwise you are welcome to lose 3kw and run a decent cat for the price of an extra $400

FYI $15,000 > $400

[R31Nismoid]

well you really can't...

its not a case of having your cake and eating it unfortunately.

[Trozzle]

he wants to tune out the smell from a decat exhaust.

the only way to do that is by changing the mixtures, which would alter the motors tune etc. not advisable.

if you want to run decat you will need to wear the risk of $15,000. pretty much end of story.

otherwise you are welcome to lose 3kw and run a decent cat for the price of an extra $400

FYI $15,000 > $400

This "fine" has gone from "$10000", to "$750" (I believe Stao/Hypergear was the one to cop this fine) to now $15000.

I wouldn't be surprised if it were nothing more than a defect notice at this rate.

Also, OP - just run it SO LEAN that the engine won't even fire up. Then you'll never have any exhaust gas passing through the system, and therefore no smell!

[GTScotT]

This "fine" has gone from "$10000", to "$750" (I believe Stao/Hypergear was the one to cop this fine) to now $15000.

I wouldn't be surprised if it were nothing more than a defect notice at this rate.

I have been of the understanding that it was $15,000 for the last decade, unless times have changed.

It will be a circumstantial penalty, depending on your situation. Yet do you really want to take the risk? And do you really want to leave noobs with the impression they may just get a defect notice?

Obviously it is the owners decision, yet a well known POOR one at that. A few KW really isnt worth the hassle.

A screamer on the other hand

[geraus]

Can you still get a fine if your car is Unregestered but driving on a permit? My exhaust is straight through no cat not muffler... just say if i went to a workshop and a cop pulls me over but im on a permit is that ok?

[Beer Baron]

it will be tough to do but leaning it out at idle and cruise etc should reduce the emissions a bit and thus reduce the smell too but basically without a cat you are going to be up against it to change things much just by altering the tune. unless it's rich as all hell at the moment in which case a tune up with a leaner AFR across the board would certainly help. but to be honest if it's a problem then you are better off spending the money on a good cat.

[PM-R33]

he wants to tune out the smell from a decat exhaust.

the only way to do that is by changing the mixtures, which would alter the motors tune etc. not advisable.

A cat turns carbon monoxide and unburnt fuel to carbon dioxide and water.

It hasn't really got anything to do with the tune unless his is tuned very rich. He can lean the motor out but it will still have the smell of running no cat since the smell is carbon monoxide.

To answer the OP's question in a serious manner, no you can not. Whatever you have read about "EVO's" doing it, you have miss understood.

[GTScotT]

A cat turns carbon monoxide and unburnt fuel to carbon dioxide and water.

It hasn't really got anything to do with the tune unless his is tuned very rich. He can lean the motor out but it will still have the smell of running no cat since the smell is carbon monoxide.

To answer the OP's question in a serious manner, no you can not. Whatever you have read about "EVO's" doing it, you have miss understood.

it will be tough to do but leaning it out at idle and cruise etc should reduce the emissions a bit and thus reduce the smell too but basically without a cat you are going to be up against it to change things much just by altering the tune. unless it's rich as all hell at the moment in which case a tune up with a leaner AFR across the board would certainly help. but to be honest if it's a problem then you are better off spending the money on a good cat.

This.

Agreed you cannot tune out the issue, but you can centainly try to change the mixture so the smell is not so evident.

Either way I think it is a silly idea, just put a damn cat on or wear the risk.

[zebra]

What is peoples problem with running cats?

I dont get it, a good one wont restrict power

[Trozzle]

I think it's the price, I was quoted $600 for a good highflow metal cat installed....honestly, f**k that.

[jjman]

Im not sure about state to state but as a general the car is out of the cops 'jurisdiction' when being driven on a permit unless it is- 1: dangerous to drive, 2: being driven dangerously.

so based on this the decat is fine on a permit...

Can you still get a fine if your car is Unregestered but driving on a permit? My exhaust is straight through no cat not muffler... just say if i went to a workshop and a cop pulls me over but im on a permit is that ok?