Hey does anyone out there know wut the best kind of catilyic converter to get?? or is it better to not have one at all??? If it is best to have one plz give me the brand name and all thanx alot
car sound, magnaflow
What I just did this weekend is purchased a cheap R/R cat. from Pep Boys, and hollowed the thing out real good. I still kept my stock one smog reasons. To tell you the truth, and this is my opinion, I felt like I gained more power doing that then when I drop in my headers. It’s a little louder but I’m lovin’ the low end!
If you do this, make sure you take your time and really clean it out.
Originally posted by MELOE
What I just did this weekend is purchased a cheap R/R cat. from Pep Boys, and hollowed the thing out real good. I still kept my stock one smog reasons. To tell you the truth, and this is my opinion, I felt like I gained more power doing that then when I drop in my headers. It’s a little louder but I’m lovin’ the low end!If you do this, make sure you take your time and really clean it out.
how much hp and torque did you gain? I noticed mine to be around 45 hp and 30 torque.
Really? I don’t think gained that much. Hard to say how much I gained, but there was a pretty big difference. Did you do the same thing I did?
Yeah i would definately keep your catalytic converter go with a good one like carsound if you want a high flow. Right now on my car i am running no cat just a straight pipe with 2 1/4 in piping to my muffler and it is friggen loud. It sounds like i am trying to race the whole world.
No, not really Meloe. dj was making fun of your comments. Hollowing the cat is pretty ghetto. I definately look down on that “mod”. Random technologies makes some high dollar high flow cat’s, but I wouldn’t necesarrily recomend them becuase they cost about 2x some of the other companies already mentioned.
Hollowing your cat actually causes turbulence. You need either a high-flow cat or a straight pipe.
get a high flow cat and stop polluting, you a$$
Originally posted by JOE
No, not really Meloe. dj was making fun of your comments. Hollowing the cat is pretty ghetto. I definately look down on that “mod”. Random technologies makes some high dollar high flow cat’s, but I wouldn’t necesarrily recomend them becuase they cost about 2x some of the other companies already mentioned.
lol
And yeah, just get a high flow cat. Might as well do it if you’re doing the exhaust too. Magnaflow is always good.
I’ll admit it’s ghetto but I still gained some power. I would much rather put a straight pipe but I don’t want no fat fine. In California we have alot of smog rules.
Originally posted by MELOE
I’ll admit it’s ghetto but I still gained some power. I would much rather put a straight pipe but I don’t want no fat fine. In California we have alot of smog rules.
You’ll probably gain as much with a high flow cat. It’s not even that much unless you’re going FI.
Does Magnaflow make a direct fitting cat. for our cars?
And incase you were wondering, I’ve already got the full Greddy cat-back and DC 4-2-1 headers. I’ll probably end up getting the good high flow cat, I just felt like tinkering with my ride.
i got a carsound, welded on the flanges, and then bolted it inline.
if you really want some power and don’t have smog laws holding you down you could use a test pipe which you can get from testpipe.com. just call the owner and tell him what specifications you want and what year car it’s from
I like DC and Greddy, in fact that’s what I started with on my old LS motor and they worked just fine. The thing you need to keep in mind is that the DC collector is like 1.75-1.9 inches (can’t remember right now, but it is definately less than 2) inside diameter, and the greddy is about the same. True you could get a test pipe, and pollute more than those big ass SUVs we all hate so much (most of us anyway), but I think getting a high flow cat is much more enviromentally responsible and will not hurt your power very much (if at all). The small inside diameter pipe sizes that these companies choose attests to the fact that our motors do not flow that much air. Getting rid of a cat on a turbo car that works optimally with a 3-inch exhaust provides a large gain (although I still am highly against it on a daily driven car). Doing it on a N/A honda LS motor does not. Let us know what you decide (unless it;s gutting the cat or using a test pipe, then your just opening yourself to attack from us people who like clean air 
).
Oooops, I didn’t realize that the dc/greddy comment came from meloe. Question; why spend $300 on the dc and $500 on the greddy and then go cheep with the part that connects the two? Foolish.
I run atest pipe because I have a fully built b16a with a vortech supercharger and in minnesota we have no emissions testing or smog laws so you can do whatever you want and there are hundreds of suv’s up here and they all drive like f***ing idiots. I store my g2 in the winter though so I don’t have to worry about them too much.
Is your b16-vortech motor in a G2 teg? I’ve only seen pictures of one other member with a vortech supercharger on it. What kit did you use?
I am using the civic si kit and am planning to upgrade to my smaller 18 lbs boost pulley in the spring after I get it tuned. current set up is as follows:
jdm b16a 2nd gen motor with ys1 lsd tranny
clutchmasters 7 lb flywheel
clutchmasters stage 3 clutch
vortech supercjarger
aftercooler kit
dsm 450cc injectors
aem high flow fuel rail
aem adjustable cam gears
aem fpr
ported b16a manifold because JG manifold would not fit with the blower
greddy type-s blow off valve with a type-r spring
missing link system
70mm BBK throttle body
dc 4-1 header although I am looking for a kamikaze header with a 2.5 inch collecter
2.25 test pipe
full catback exhaust custom 2.75 inch piping with a matrix muffler
b16a cams
eagle rods
9:1 compression bored .20 over wiseco pistons
fully balanced b16a crank with micropolished journals, allows me to rev to 9,500 rpm’s but I need to head next year to keep up.
arp everything, rod bolts, headstuds, and main bolts
hondata s200b soon I hope
p28 ecu
walbro 255 lph fuel pump
should haul ass this summer and am looking for 11’s or 12’s on slicks but keep it daily driven because after all I didn’t spend this much to let it sit although that is what it is doing right now.