Jump to content
SAU Community

Recommended Posts

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 1291144911_l.jpg

Cheers Michael :/

Link to comment
https://www.sau.com.au/forums/topic/156946-how-important-is-an-highflow-cat/
Share on other sites

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..

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

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

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!

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

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.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • The sodium acetate, mixed with citric acid, doesn't actually buffer each other. Interestingly though, if you used Sodium Acetate, and acetic acid, THAT becomes a buffer solution. Additionally, a weak acid that can attack a metal, is still a weak acid that can attack a metal. If you don't neutralise it, and wash it off, it's going to be able to keep attacking. It works the same way when battery acid dries, get that stuff somewhere, and then it gets wet, and off it goes again breaking things down. There's a reason why people prefer a weak acid, and it's because they want TIME to be able to be on their side. IE, DIY guys are happy to leave some mild steel in vinegar for 24 hours to get mill scale off. However, if you want to do it chemically in industry, you grab the muriatic acid. If you want to do it quicker at home, go for the acetic acid if you don't want muriatic around. At the end of the day, look at the above thumbnail, as it proves what I said in the earlier post, you can clean that fuel tank up all you want with the solution, but the rust that has now been removed was once the metal of the fuel tank. So how thin in spots is your fuel tank getting? If the magazine on the left, is the actual same magazine as on the right, you'll notice it even introduces more holes... Well, rust removal in general actually does that. The fuel tank isn't very thick. So, I'll state again, look to replace the tank, replace the fuel hanger, and pump, work out how the rust and shit is making it past the fuel filter, and getting into the injectors. That is the real problem. If the fuel filter were doing its job, the injectors wouldn't be blocked.
    • Despite having minimal clothing because of the hot weather right now, I did have rubber gloves and safety glasses on just in-case for most of the time. Yes, I was scrubbing with my gloves on before, but brushing with a brush removes the remaining rust. To neutralize, I was thinking distilled water and baking soda, or do you think that would be overkill?
    • You can probably scrub the rust with a toothbrush or something. After you get the rust off flush well with water to neutralize and you will probably want to also use a fuel tank sealer to keep it from rusting again.
    • The sodium citrate solution is designed to buffer the citric acid to keep it from attacking metal quite so much, the guy that came up with that recipe did a ton of testing on how much metal loss occurs over time and it's nothing crazy unless you forget about it for months:   
    • Ohhh I see lol To be honest the main reason why I wanted to start modding is because of a business trip to Japan and Indonesia. I saw many cool and modded cars all throughout in these countries, especially Japan. I myself am of Chinese+Japanese nationality and when living in china (never lived in Japan js my dad side lol) I remember staring at these cars pass by with their loud tacky exhausts and insane wide body kits. And when I went back to Japan, I got even more invested even asking people about their cars and why they modded. Most gave similar answers to what you said but funny enough one guy just said that he saw the need for speed movie being filmed once in Tokyo I think near Shibuya Crossing and got inspired to tune and mod. After that I just started to fantasize on owning a car like that. Also tbh I prefer the R32 over the R34 it's just the R34 is more iconic lol (also apparently better aftermarket support than the R32) and my only goal really is just to make the car mine and make it fun to drive. As much as I love my Cayenne it's pretty bland to drive. Sure the interior is nice and pretty, gives you attention yada yada but I've wanted to experience what it is like to have a car that is truly yours. I suppose thats the goal so far. Haha if you find where I'm from, then sure. Ill help you out on your next "financial decision"
×
×
  • Create New...