best cats?
just wondering what cats, (catilytic convertors) has every one got, and what do they think of them? im in the hunt for some new ones and they will need to flow 300kw.. just looking for some opinions..
i had my cat gutted and replaced with a straight through pipe so it flows quite well andstill looks standard and it also passed inspection. This was a few years ago now so noty sure if they have the emissions tester yet sop probably wont pass now.
wouldn't that default the computer to run rich and eventually stuff the o2 sensors?
Infidel Bear
Mini Putt 2 Champion!
best cats are stock. Anything else and you leave yourself open to massive emission fines.
"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind."
- Theodor Seuss Geisel
Jizz in my pants
Oh so good to be in a country where, hey cats what catsbye bye cats
Last edited by ScoHar; 10-12-2008 at 02:22 PM.
nope been like for the last 4 years never had a problem. Only had it done because the Baffles went in the original cat and the exhaust place didnt have another there at the time.Originally Posted by vyss300kwute
aren't the oxy sensors just before the cats, so wouldn't be affected? from memory, haven't looked at the underneath for a while so maybe wrong.
Proud Clubby Owner
Having no cats gets you a fine. Having aftermaket cats, they might make you refit the stock ones to remove a defect sticker. I am sure that 100cpsi (high flow) cats would work just as well as some of the 10 year old cars out there that have never had the cats replaced.
I've seen a few cars with 200cell stainless cats get passed by the epa no probs. It's all in the tune I rekon.
Donating Member
magnaflow cats are very good, i have them on my ss. Make sure you get metal ones not ceramic.
--
Wants a Manual =]
was in my local exhaust shop and he said standard holden cats are the best
After the suggestion that bypassing cats would cause the mix to go rich, I am wondering if this relates to my present problem.
Since getting my exhaust system replaced, my motor runs rich and soots up the (new and previous) plugs almost immediately.
Other recent changes were change of transmission, and change of DFI which had failed, and change of external petrol filter (NOTE the old one was full of rubbish: assuming more fuel now gets through, could this be the cause?)
Any help would be appreciated.
iv been told when you replace the exhaust on some gen3's you've got to get them tuned, or sometimes its the oxy sensors themselves, guys at holden told me this apparently it happened on some of the early gen3's when they had a few kays on them and the oxy sensors were older and weren't reading as true, i think someone else had this proplem and it was there oxy sensors, also i had a look at mine yesterday and they do sit just before the cats so the cats would not effect it as it reads before not after.
Donating Member
The protective coating on new extractors can kill your O2 sensors. Clock up about 1000kms then get replacement sensors.
--
i have got a vt s pac l67 but i seem to be having problems over the past 2 weeks as i am cruising my car would stutter then drive normally and it would only happen every so often and it has only been doing that since i got my catalytic converter fixed now i know l67s have 2 cats but seeing as i have only replaced one with a magnaflow highflow and still have a standard genuine cat which has blown out can that cause my car to stall at idle or stutter when driving ???? i really need help because i have changed almost everything on the car to correct that problem i have done
1. crank angle sensor
2. genuine spark plugs
3. fuel filter
4. air filter
if anyone has any ideas feel free to post
thnks
Posting Permissions
LinkBack URL
About LinkBacks
Reply With Quote