How Important Is An Highflow Cat..?

[Kaido_RR]

Hi,

Im looking to see if its worth while upgrading my cat. At the moment my car has 251rwkw @ 16psi, i am still running a stock cat.

Althou when i bought the car some years ago i was told that the cat had been bash abit. Also i'm running a miss-firing system and are able to produces large flames out of my exhuast when running it (which i through would not be possible when running a working cat)

So my question is, would all the abused my cat has taken over the years, make it pointless to upgrade to a highflow or straight-through pipe?

heres an example of how big the flames get

Cheers Michael

[kastin]

ahh good old west coast highway

[WazR32GTSt]

if you're shooting flames, then you probably have NO cat right now...

how imoprtant is a cat? very, if you plan on keeping the $10,000 fine in your investment portfolio

as long as its the same diameter as the rest of your exhaust, i don't think it matters if it says "high-fow" or not..

[Kaido_RR]

I do have a cat on my car. but im not sure weather it has anything in it or not

[markimak]

haha u knw u wanna punch it out lol.. yeah but 10k is alot but according to the records.. NO ONE has been charged the 10000 yet. they have been ordered to replace the catalytic converter..

[Taso84]

Yea if cops catcha, theyll tell u to fix it and might slap a canary on. If EPA catchu, you will get a 10,000 fine.

Man, im against noise pollution laws, but honestly, do u know how much ur polluting the air by not having a cat? The cat filters most of the more dangerous chemicals.

If every1 listened to markimak then we would all be wearing gas masks within 10 years. Im no "ultra left greenie" but honestly, there are very dangerous sulfurs in the exhaust that need filtering

[Kaido_RR]

umm

maybe my question wasnt clear

Will running a stock cat (in normal or damage conidtion) with 250rwkw affect my power of my car?

[Devils_Advocate21]

The easiest way to get power is remove restriction its hard to say if it will or wont affect the power of the car, then again id say it would if the current cat is abused or punched out already. Simple task would be get one see what happens if it changes power change to a highflow, but id dare say if you have supporting mods and large exhaust front/dump and cat back it would be the bottle neck of your power is that the answer you are after

[AD4M]

michael yes it will

i had to replace my stock cat on the weekend (With a decat) due to it becoming blocked after 3 weeks.

car was tuned for 1.3-1.4 bar but when the cat became blocked it was strugling to see .9 bar, since the decat it's now shooting past 1.4 bar so time to get it back on the dyno for a tidy up on the tune

biggest regret was not having the cat removed prior to the power tune!

[2gceffy]

i have a straight threw exhaust and iv never seen a flame !! it pops and stuff as you would expect.. from what i read a cat can cause restriction, just price some high-flow cats and decide if u wanna fork out that much or not

[paulr33]

it will make a massive difference

try it with no cat and see how it goes

[Kennedy]

flamage equals no functioning cat and rich tune

[Kaido_RR]

thanks guys

i have a retune coming out in the nxt few weeks and i wasnt sure if it was worth getting...

I have seen some highflow cats ads on EVO fourms in the uk which support antilag im not sure how ture this is but i may try to one of those as im running a missfiring system and dont wanna blow out a $600 highflow cat

[Kaido_RR]

flamage equals no functioning cat and rich tune

i have a missfiring system (aka antilag) that is why such huge flames

[Kennedy]

Kewl

[Zoggy]

keep the flames dude,

[lingeringsoul]

does it make BANG BANG BANG BANG!!!!???? noise? I love that shit..

[BAMR33]

I'd say keep it as is, I'm sure there's not too much restriction left in that cat judging by flames. And if the cops pull you up and have a look underneath you'll be set '1xcat... tick'.

[MrStabby]

I'd say definitely change it - i just changed my stock cat for a metal cat and cant believe the difference. Noticeably more power, smoother, and maybe better econ (got 470k out of the first tank after the change, i usually get 430/440. Maybe it was a one off...). YMMV as my stock cat appeared to be in reasonable condition - certainly no flames. FWIW i had 231awkw with the stock cat, must be like 250awkw with the metalcat.

[AD4M]

pretty sure the stock cats shell (flange diametre) is 2.5 inches aswell, so theres a bit of restriction that can be removed by goin a 3 inch decat or 3inch highflow if u choose