Woohoo. Just had a metal high-flow cat supplied and installed for $320 by Exhaust Dynamics here in Adelaide. Got looked after really well by Mick. Derry, Mick says hi. Seems another magna got it done last Friday. Anyone from here?

Can I ask whether you had a 200 or 100 cpi cat fitted? Any louder than previously? Cheers D

bit louder and being a stainless steel metal cat, slight bit more rasp as well....

Can I ask whether you had a 200 or 100 cpi cat fitted? Any louder than previously? Cheers D

I think it is 100. No difference in sound at all. The installer said that it'll be louder with an aftermarket exhaust. Interesting to note that I have two resonators. 1 smaller hotdog, about 2cm bigger in diameter and about 20cm long amd then 1 bigger one, about 4cm bigger in diameter and 30 cm long afterwards.

Definitely with after market exhausts they can make it sound like a fart in a milo tin. To which point you just have to put in another resonator.

Can you feel any power difference at all? :)

Definitely with after market exhausts they can make it sound like a fart in a milo tin. To which point you just have to put in another resonator.

Can you feel any power difference at all? :)

Too early to tell. Need to let things settle in a bit and not let fact that I had it just installed cloud my judgement. ;-)

bit louder and being a stainless steel metal cat, slight bit more rasp as well....




I think it is 100. No difference in sound at all. The installer said that it'll be louder with an aftermarket exhaust. Interesting to note that I have two resonators. 1 smaller hotdog, about 2cm bigger in diameter and about 20cm long amd then 1 bigger one, about 4cm bigger in diameter and 30 cm long afterwards.
Haha Boozer got burned

Is it a Ballistic brand cat by any chance Vlad?

Haha Boozer got burned

Is it a Ballistic brand cat by any chance Vlad?

What brand cat would u recommend Mohit?

What brand cat would u recommend Mohit?
Any 100cpi cat is illegal but if you were going for one i'd go with a Ballistic cat
One of my friends has 2 of them io his SS and they have been great
A lot of LS1 guys run these cats
You can get them from Sureflo Exhaust in NSW

Yes, it is the Ballistic B063-100. The installer was actually installing a pair onto a VZ SS ute.

Any 100cpi cat is illegal but if you were going for one i'd go with a Ballistic cat
One of my friends has 2 of them io his SS and they have been great
A lot of LS1 guys run these cats
You can get them from Sureflo Exhaust in NSW

Nay I'll like to keep them legit so I'll go for the 200cpi cat. Same brand for the 200cpi mate?

Is this on an otherwise standard sports exhaust? It'd probably make too minor difference to notice, but all the same I'll ask, any differences in driving feel at all?

i work there

can anyone explain the difference between 200cpi-100cpi cats, and why 100 cpi cats are illigal, are they better?

Mareko_16, you may have posted into the wrong thread.

altera, the cpi is the cell count per inch square. So if you draw an imaginary square that is 1inx1in, then the number of holes is the number of cells much like those of a honey comb. The less holes, the less restriction/higher flow. However, from memory, 200CPI is also illegal.

2OO CPI is legal and 100 is not.

Might be an ignorant question but why is the higher flow illegal? Is it to do with emissions control, noise restriction or something else entirely?

AFAIK, basically the higher the flow the less.. catalysing it does.. so emissions.

My TJ I had a big hole burned right through the guts of it's converter when I traded it. It did about 6.5 L/100 on the highway compared to about 9L/ 100 in the KL. I would love to get my old fuel economy back but you had to keep the windows wound up when reversing or idling because of the rotten egg gas smell. It was just like sitting behind a falcon at the lights in '86 when unleaded first came in.

This smell, is it from the stuffed cat converter? I dont have one, but dont get any rotten egg smell? oh and yes without the cat, economy is much better! I use $35 worth of gas @$1.79 p/l ( to get 320kms to family up north, mostly highway).. I offset the emissions by recycling. lol

I offset the emissions by recycling. lol

:bowrofl:

What's the standard Magna Cat rated at in terms of CPI?

Probably 400cpi. While cpi is important, the way the cat's neck opens and the cross section of cat 'biscuit' will determine the actual flow potential of a cat.

I.e.

http://img163.imageshack.us/img163/1461/catspic.jpg (http://img163.imageshack.us/i/catspic.jpg/)

1) Most common 'high flow' cat. Low cpi, typically 200. Poor surface area at end of biscuit producing turbulence and backpressure. Sometime not a lot better than a std cat (see pic 3).

2) Better / best high flow cat design. Larger surface area and better neck design.

3) Std Cat on a 3rd gen, large surface area, high cell count. Normal to see this in oem as designers try to mitigate the need for emissions compliance while retaining some semblance of performance/flow/fuel economy

I ALWAYS recommend to people to see what High Flow cat is to be installed on their car. It's YOUR money, with a little knowledge you can make an excellent addition to your ride. :thumbsup:

Thanks for the practical info EZ Boy, hope to replace my cat soon. Is there a "recommended" high flow cat brand?

Everyone's having a stab at them these days. Most are still imported from China, India and Malaysia. Get your eyes on them and check it against the 'criteria'.

Metalcat?

So something like the Magnaflow metal OVAL Cat would be a good bet??

http://www.car-sound.com/02product/universal/910M.asp


Like the good old boys say " Ain't no substitute for cubic inches"

Gerry

Looks pretty good.

I've just been researching legallities of the 100CPSI cats and according to this website (http://www.lpgautogas.com.au/images/Vehicle%20Options%20Listing%201Nov07.pdf), 3rd gen magnas/veradas are only Euro 2 Compliant which means 100CPSI cats are fine. Also read elsewhere which I can't find the website again that Euro 3 requires at least 200CPSI cats.

I've just been researching legallities of the 100CPSI cats and according to this website (http://www.lpgautogas.com.au/images/Vehicle%20Options%20Listing%201Nov07.pdf), 3rd gen magnas/veradas are only Euro 2 Compliant which means 100CPSI cats are fine. Also read elsewhere which I can't find the website again that Euro 3 requires at least 200CPSI cats.

Just a quick question (which will hopefully contribute to the discussion in some way)

Just because our cars are Euro2 compliant / 100CPI cats ok, is it actually legal to intentionally fit a 100cpi cat to the car?

Wouldnt you legally, have to keep the current standard in the car to keep with compliance requirements?

Interesting, I've seen on 100cpi cat's on ebay that they are actually illegal for road use. So not sure if thats just a general statement but either way...I wouldnt risk it...Just go 200cpi. you wont see a gain or benefit from a 100cpi.

* Some * 100cpi cats have accreditation, again it's because of the cross section of biscuit being large and improving the actual surface area available for catalytic reactions. Ask for it in writing that it's street legal. I'll be at the Muffler shop tomorrow so I'll see what's available in 100cpi street legal.

http://www.metalcat.com.au/

I just had a second-hand stainless steel 200cpi free-flow cat fitted to my TF 3.0

I bought it used from one Aussie Magna member who got it off another one ... so I don't know make/model.

It was part of a complete sports exhaust: flexi-pipe, cat, resonator, rear muffler. I had the middle and rear sections fitted a few months ago, immediately noticed smoother and quicker acceleration. Nice exhaust note too, but an annoying drone inside the car around 2000RPM (just about all driving around the city!).

The free-flow cat had to be cut away from the flexi-pipe and flanges welded on to replace the stock cat, hence the delay in fitting. Acceleration now feels like it has even more urge (though it's a subtle sensation) and the drone seems slightly smoother and sweeter, less sense of turbulence. Overall, it feels as if the full cat-back treatment really is necessary to "complete" the upgrade.

I'd love to get rid of the drone, but the cost of more cutting and welding is a concern. From members' experience, can the right resonator (or combination of resonators) really make a significant difference? And will it take a skilled exhaust expert to find/select the appropriate resonator to tune the sound right?

Yes. And; Yes. Get the longest, largest, glass packed resonator (NOT hotdog) that you can fit under your car. It'll take out the 'rubbishy' sounds and reduce drone considerably. Remaining note will be deeper and more purposeful under load/acceleration. You've got an auto?

On the subject of catalytic converters I have a quick question.

If higher ZDDP content in engine oil protects an engine from wear quite well and at the same time it destroys the catalytic converter slowly on the car, wouldn't that be better choice in bigger scheme of things. Damaged cat every few years for an engine that has suffered very little wear?

Yes. 10-20x cheaper than an engine.

Yes. And; Yes. Get the longest, largest, glass packed resonator (NOT hotdog) that you can fit under your car. It'll take out the 'rubbishy' sounds and reduce drone considerably. Remaining note will be deeper and more purposeful under load/acceleration. You've got an auto?

Yes indeed, auto. Not an enthusiast's best choice, always laggy in getting going and a bit like either all-out kick-down rocket or half-hearted gradual acceleration.

Yeah, the bane of 4speed autos. Needs a pd blower or small turbo to keep the mid range on the boil.

Hmmm are you talking about the 3l? i find the 3.5l has its best kick from 2500rpm up. midrange is great. never driven a 3l though.

Both in 4spd auto guise. The 'box ratios lack urgency especially behind (or beside ;) ) the 3L motor. A longer stroke and higher compression would've saved the day but that wasn't the Industry Trend at the time. 10years later however....

http://www.metalcat.com.au/

What pipe diameter do magnas have? From looking, I'd guess 3"? Think I might be coming up due on a new cat, is starting to smell and have recently noticed that fuel consumption has been edging up slowly..... Might have to run diagnostic on O2 sensor....

What pipe diameter do magnas have? From looking, I'd guess 3"? Think I might be coming up due on a new cat, is starting to smell and have recently noticed that fuel consumption has been edging up slowly..... Might have to run diagnostic on O2 sensor....

They are 2.5".