Catalytic converter and free flow.

B

BCO

Honorary Master
Joined
Dec 17, 2004
Messages
13,229
Reaction score
27
Location
Slaapstad
Question: does a fitting a free flow exhaust necessitate the permanent removal of one's catalytic converter?
 
From what I have heard, yes. But maybe they can leave it there? Dunno, but I'm sure some cars are electronically forced to keep their catalytic converter... The last time I went to a PowerFlo branch, they said it would have to come off.
 
Last edited:
yes, i think it does come off from what i have heard, but then you need a mini-cat, to keep the enige light off...

...they shouldn't be expensive though, probably around 350
 
Surely then, free flows should be banned in SA now that we have emissions legislation?
 
But it makes the cars more powerful...
Emissions lol!!

I saw mine when I did my wheel alignment. PGTi looks nice underneath:p
 
JK8, there are now emissions laws in SA. If Free flows result in a contravention of said laws, why are they allowed to be sold?
 
BCO said:
JK8, there are now emissions laws in SA. If Free flows result in a contravention of said laws, why are they allowed to be sold?
Click to expand...

They not sold as standard. Theres no laws about aftermarket engine components is there?

What other purpose doe the catylitic converter serve? AFAIK theyve been in cars long before this green movement started...
 
JK8 said:
They not sold as standard. Theres no laws about aftermarket engine components is there?

What other purpose doe the catylitic converter serve? AFAIK theyve been in cars long before this green movement started...
Click to expand...

All cars in SA after Jan 2009 are now fitted with catalytic converters so that they can confirm to the Euro 2 spec.

Catalytic converters make a huge difference to the amount of NOx and CO that are emitted by cars. Both of these are not very pleasant gases, so the cat is doing a Good Thing. Also, they have been around since the 70's (and "this green movement" has been around even longer).

CO2 is not the only pollutant out there.
 
You cannot just fit a free flow to a car that has a cat without some retuning.

You will start having niggly engine light problems as well.

A friend with an M5 removed the cat, but then had to have everything rechipped...quite an expensive operation in the end, and I'm not sure that he gained many horses in the end either!

The car SOUNDS faster, however...lets see...5km/h/gear and 6 speed box...umm MUST add at least 30km/h in SOUND alone!! :D
 
Fazda said:
You cannot just fit a free flow to a car that has a cat without some retuning.

You will start having niggly engine light problems as well.

A friend with an M5 removed the cat, but then had to have everything rechipped...quite an expensive operation in the end, and I'm not sure that he gained many horses in the end either!

The car SOUNDS faster, however...lets see...5km/h/gear and 6 speed box...umm MUST add at least 30km/h in SOUND alone!! :D
Click to expand...

The engine light is simple to bypass...
 
JK8 said:
The engine light is simple to bypass...
Click to expand...

I agree, but it sort of defeats the object of the idiot light if you disconnect it, surely. It does have other functions apart from telling you that the cat is still purring, after all...:)
 
The O2 sensor is stuck into the cat conv. So on your freeflow drill a hole into the box and refit the sensor it should work cos the computer works on the engines emissions to adjust the fuel air flow. I did this on my MR 2 and it worked no problem. I screwed the cat by filling up with leaded fuel and was not going to pay R23000. for another one.

What car is it?
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X