Upgrading My Cat

[SiR_RB]

hi

ive been doing abit of research, and it seems like 100cell hi flow cats are the way to go if your running more then average power (300kwatw)

i know there are tons on ebay, but the quality is unknown, ive enquired about the CES 100cell 3" hiflow cat they have on offer and im waiting to hear back about flow/warrenty/etc, has anyone got/used a CES cat before ? how did you find them?

also looked at afew catco metal cat ones from justjap but they are 200cell. how much power can you make with a 200cell 3" cat before you need to upgrade? is there reallllyy that much of a power differnce between a 200cell and 100cell ?

i just want to do it once do it right, dont want to keep changing cats becuase they collapse after afew months, or find they are restricting flow

any helpful information would be good !

thanks

[krzysiu]

Straight pipe + cat shell welded on top. f**k a cat lol

[R31Nismoid]

300rwkw = 4" cat at least.

I cannot see a 3" honeycomb cat flowing enough. I can feel a minor different with my 4" CATCO cat with a 3.5" exhaust/280rwkw.

It's not major, but its noticeable none the less.

I'd be going with a big 4.5" CAT personally having doing it again.

[bozodos]

or you could man up and decat that shit

[BoostedBarge]

I went with a 100cell, 5" cat from an exhaust shop in Bathurst. I forget their name. They shipped it up to me. Was a reasonable price and hasn't given me any issues that I'm aware with.

[SiR_RB]

My front pipes merge into 3" collector and my cat back is also 3", can an exhaust place modify a 3.5" or 4" cat down to 3" flanges? That way the internals are huge and flow more ut will fit my system perfect ?

Cheers

[The Dan]

a 3" 100 cell is fine. You only need a 4" 100 cell if you are going to push out over 400rwkw

If you want to do it right the first time then listen to the guys at CES - they are undoubtedly the best in the industry

[saliya]

hi

ive been doing abit of research, and it seems like 100cell hi flow cats are the way to go if your running more then average power (300kwatw)

Less cells = less surface area for catalyzing = bigger holes. More flow at the expense of less effective catalyzing. At some point the conversion will stop being legal.

I have a metalcat cat (6" body, no idea what the in/outlets are supposed to be but probably 3.5"). I would guess it's 200cell as I don't think they had 100cell then.

For what it's worth it's been under the car for a few years, been through many track days and a couple of intercooler-pipe-blew-off

fireballs that destroyed the car's glasspacked mufflers.

I recently pulled it off the car and while a little black, it seems to be in perfect working order. Can't ask for more than that.

Cheers,

Saliya

[SiR_RB]

Less cells = less surface area for catalyzing = bigger holes. More flow at the expense of less effective catalyzing. At some point the conversion will stop being legal.

I have a metalcat cat (6" body, no idea what the in/outlets are supposed to be but probably 3.5"). I would guess it's 200cell as I don't think they had 100cell then.

For what it's worth it's been under the car for a few years, been through many track days and a couple of intercooler-pipe-blew-off

fireballs that destroyed the car's glasspacked mufflers.

I recently pulled it off the car and while a little black, it seems to be in perfect working order. Can't ask for more than that.

Cheers,

Saliya

what sort of power are you making with the 200cell metalcat?

[juggernaut1]

I use a 100 cell CES racecat - 5 inch body 3.5 inch in and out. Usual impecable quality.

[GTScotT]

As usual I see lots of confusion on cat sizes.

Most people take "5" cat" as having 5" flanges, me included. Where as people are refering to the actual body of the cat. It could have 2" flanges for all we know.

The body is also important, the larger the body the larger the cell size at a given count. A 5" body with a 200 cell count will flow worse than a 4" body with a 100 cell count etc.

I think people in the know need to be more specific when stating figures with cats.

[R.3.2.G.T.R]

im using catco metal cat with 5" body and 3.5" outlets, have checked it recently after being in for bout 2 yrs and it looks good as new

[GD51LA]

i got a full stainless steel 5", 100cell cat from sureflow exhaust for 250 or $300, cant remember

just tell them your a mechanic and you get trade price

[Randon_I_Am]

I've got a Xforce "highflow" cat, and i just found out they are 500cpsi... shit!

anyone used one of the ones floating around ebay?

http://cgi.ebay.com.au/ws/eBayISAPI.dll?Vi...e=STRK:MEWAX:IT

[saliya]

what sort of power are you making with the 200cell metalcat?

1 power run @350rwkw before the dyno overheated.

I intend to visit another dyno with a slightly-different setup sometime soon (same cat / similar exhaust).

Will remeasure and repost.

Cheers,

SW

[scotty nm35]

I've got a Xforce "highflow" cat, and i just found out they are 500cpsi... shit!

anyone used one of the ones floating around ebay?

http://cgi.ebay.com.au/ws/eBayISAPI.dll?Vi...e=STRK:MEWAX:IT

Yep, i have bought 2 now. Mine is flowing great, not sure about the emissions though. I cut the inlet back to make it 3.5 inch.

[Randon_I_Am]

cool, I'm bying one in the morning

[bozodos]

should probably make sure it's emissions legal, otherwise you may as well run a decat

[scotty nm35]

should probably make sure it's emissions legal, otherwise you may as well run a decat

They apparently meet euro3 standards, what else can you go by? Stops the smarter cops shoving something up there and finding the hollow pipe I guess.

[battery]

on the subject where can you get cheap straight pipe cat pieces with flanges?