Racing Exhaust....?

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Hey do you think their will be much of a diff between me removing the catilitic converters out of my exhaust pipes and buying a set of aftermarket racing pipes?

posted by  cake872

Depends on the motor, but should free up some power either way

posted by  newyorker

It'll definitely free up some noise.

posted by  PontiacFan27

Free up some power, some noise, and maybe some smell. It's not uncommon for cars with the cats removed to smell like rotten eggs. A full exhaust (headers, catback, and whatever you plan on putting inbetween) will cost a lot of money for minimal gains. You may barely be able to feel the increase in power. Add in the pain in the ass it will be to get it inspected plus the guff you'll get from the cops too.

posted by  giant016

well hes not in the us...if i remember hes in puerto rico or somewhere else like that so the laws may differ

posted by  newyorker

Yeah, but it would still draw attention, and make it seem more likely that he is involved in illegal street racing.

posted by  chris_knows

so does my side exhaust, and hid kit, and window tint, and lowered suspension...cops never pull me over, and unlike the 300, with my car they would need no effort to stop me even if i was dumb enough to run

posted by  newyorker

Whether or not it's legal where he is isn't the whole story. A good setup can run over $1000, and he might gain 20hp. A lot of people do exhaust early in the modding stage because it makes the car more fun to drive, but for performance/dollar there are probably a few better alternatives at this point. This is assuming he means a full race exhaust (headers, midpipe, catback).

posted by  giant016

Maybe for noise, but at least they'll be used to the bad smells.

posted by  PontiacFan27

Well I dont have headers but I do have a catback exhaust already. And if I just rip out the converters form my current exhaust that saves a bunch. So it would be that lil trick and jus to purchases the headers. and yes i live in the bahamas and it wouldnt be a prob at all. and no not any street racing as yet

posted by  cake872

Exhaust may have minimal gains, but put engine work into your car with a stock exhaust and then you're f-in yourself. Exhaust is a very important part of the tuning equation. 20hp... That's a pretty good increase btw.

Laughs @ removing cat.

posted by  Integra_LS

From previous experiences, cats can smell of rotten eggs themselves, even more so if you have just been driving quite 'hard'. I've always looked at this as being the cats way of telling you that it hasn't got long left.....maybe.

posted by  Cliffy

If you wana save money, take out the cats and grind out the insides..basically hollow them out, will give the same effect as a test pipe, and will cost nothing..dont forget to make a CEL Defouler look up how to make one its very easy. no cats smell like gasoline..i love it

posted by  newyorker

If you mean just hollow out the cat and put it back on, minus the honeycomb inside, I done this on my 1996 Vauxhall Astra (not for a performance upgrade, but because it was breaking up anyway, and became restricted). And it made no difference at all to performance or even sound. It's also worth noting that the inside of a cat can be bad for your health...Kinda ironic really, lol.

posted by  Cliffy

im talking about gutting the whole thing, including the honeycomb. My buddy did this on his s2000 and gained a noticable gain in power

posted by  newyorker

Dont gut a cat, but it out and replace it with a test pipe, then sell it to a CAT buyer and end up making money on the whole ordeal.

I do belive F-body cats are going for 35 dollars a piece.
2 cats=+70 dollars
Test Pipes put in=-25 dollars (at most)
total = +45 dollars

WIN, WIN

posted by  Enthusiast

Theres a guy paying $60 EACH for LS1 cats over on LS1tech, and something tells me he's selling them for more.

posted by  giant016

Thats who I was talking about, damn I though they were 35, Ive got 4 laying in the garage, time to sell some cats.

posted by  Enthusiast

Somebody said something about it being whats in them, like little platinum balls or something

posted by  Enthusiast

From what I was told, it is very expensive metals and things they use...platinum or titanium or something...duno why but thats what the guy with the S2000 told me

posted by  newyorker

That's what I done with mine but with no noticeable changes, not even noise. It might affect different cars in different ways I guess, but the shape of the cat wouldn't help it in most cases I suppose (mine just looked and acted like a normal silenser after gutting it!)....Probably better off just replacing it, if of course you're not that bothered about the laws surrounding this, lol.

posted by  Cliffy

Platinum is in them, but there is some other oddball metal in them that is worth WAY more, but hard to extract.

posted by  giant016

cutting the cats off will also increase your horses alittle, but im a welder so all the cars i race i cut the muffler and the cats off and weld straight pipes to them, you can tell a BIG difference... louder and alittle more horses

posted by  MwJ450

it looks like bee hives, its got the holes it in and everything, but it is real platinum, we take alot of cars to the scrap yard and ill cut the cats off and get about $80 a cat + whatever the car brings in

posted by  MwJ450

aka 'Honeycomb' :wink2:

posted by  Cliffy

yep...

posted by  MwJ450

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