the random tech doesnt have the flanges or bung prewelded though right?

 

Test pipe FTW!

 

I'd rather not pay $400 for an hour of tuning to show that my $200 cat is "worthless" to me and I should have bought the $300 one in the first place... then have to try to reschedule another tuning session when the new one comes in for another $400, but still not even have a baseline to work off of which would be another $400. I'm sure I could get a great cat for $1,400 (or $1700).

Fact is, I've seen 2 sets of results for the randomtech comparing it to stock and a test pipe.... and none for any of the others. The Perrin looks to be the second best choice price/performance wise, but I'd like to know if someone ran into a 10hp gap like they have on the other ones... if that was the case then I'd just put my stocker back on.

Basically, I want to do it right the first time. I've gone on people's word without dyno proof for parts plenty of times on past cars, and more often then not the only thing it left me with was a hole in my wallet when I went back and bought the correct part later.

It does have flanges, I'm 99% sure its the correct size. The only thing it does not have is the O2 bung (which are only about $20 and easy to weld in... and may even be on the cat back I want to get)

Something i realized recently, irresponsible off-track pollution ftl. I have to breathe this air too. If the cat can do it just the same as the RTP or TP, I'm willing to pay breathe cleaner. You gotta pay to play, and its either now or later... trust me, I'm sure later will be much worse.

 

Ill be dead by then!

 

I personally want to run a cat because I think it makes the exhaust note sound better (deeper). A decent HFC should really starve performance either so I have no problem giving up 5whp for a legal, clean exhaust.

 

fyi...hfc is no better then test pipe. stocker is the better one for clean air.

 

I am not trying to combat your information but how is that possibly true? It obviously isnt as good as a dense cat but it does do something, you cant deny that. It is definitely better then a test pipe.

 

I had the apexi super catalyzer. I gained 5whp and 3wtq changing to a test pipe (Iam running fp green turbo) That cat really flows but very pricey.

 

here is a catco cat that i'm thinking of getting.

i know Buschur uses a Catco cat but this might be different

http://www.frsport.com/FR-Catco-Lanc...er_p_2336.html

 

The thing that turned me off to the buschur was the slip on on one side of it.

I thought about having AMS just weld on the 2 bolt flanges onto their unit, but that would probably cost more than its worth.

Another benefit that I see to both of the ones I'm stuck on is that they both lack a ton of steel and heatshield... I think the Perrin only weighs about 5.5lbs, and the Randomtech looks to be similar weight and size.

And I'm sure these aren't quite as clean as the stock cat, but I would be surprised if the decent ones didn't come really close... I imagine you couldn't pass a sniffer if they didn't. We're talking crossing fine lines with that statement though. If I was a totally green head I'd be riding my bike 28 miles to work every day or at least driving a jetta TDi tanked up on low sulfer or biodiesel... but since I'm rocking a car that only gets 20-23mpg anyway I'll do what I can to help.

 

wow, 5 whole horsepower! boy, I'm sure nothing else could have caused that...

When my car was last on the dyno (2 weeks ago) I did a bunch of back to backs runs without changing anything and the variance between the runs was more than 5awhp and 3lb-ft

this just in: dyno numbers can vary run to run!

 

well with that catco from the link it bolts right up. although it may be heavier than the perrien unit but i wonder which would be cleaner.

does anyone with a Perrien unit ever get the sniffer done?

 

If your doing a high flow cat then you get a metal core....perrin, random tech, etc. The flow much better than the ceramic core cats and last longer.

If it claims to be 50 state legal and for some reason it doesn't pass then you can get your money back im sure...

but go metal core if you must do a high flow....

 

No sh*t, I know dyno runs can vary. But Are u trying to tell me that the apexi cat is like running a test pipe.
( no hp diffrence???? ) (no flow diffrence) ????

 

no, I am trying to tell you that running cat-less is stupidly irresponsible for the negligible gain of power.