Pre-Cats removal question

[unknown007]

when going through smog they dont look for pre-cats right?I was thinking of removing them and putting a pipe there instead and keeping the nissan cats then go straight pipes and add a mangaflow muffler inda end.let me know.

[qship96]

impossible to "remove" them as they are built in the exhaust headers as one piece.....now you could unbolt the rusty old exhaust system, pray that you dont destroy it in the process, and gut the internals{hollow them out}-but hardly worth the effort, as there is not much power to gain there.

More power could be restored by performing basic maintenance, renewing old knock sensors,plugs,setting timing,cleaning intake and fuel system,etc.

Why go to all the effort, expense,and expose yourself to the liability of tampering with emission control system and the end result is marginal gain in power AT BEST.....and still get spanked by any newer v6 altima,camry,accord,g35,etc????? Sorry, the Q is just not "fast" compared to todays modern v6 and heaven forbid, v8 cars.

[unknown007]

Not true about the accord.Sorry dunno who your raced i beat alot of v6 v4 and some v8.Im not trying to get power right now im just trying to get a deep tone roar.I will be turbochagring it later in the years but for now i want and exhaust system.I read up somebody removed the pre-cats and welded a pipe.If i gut out the cats it wont pass smog would it?i already cut off the muffler.

[maxnix]

im just trying to get a deep tone roar.

Best bet is to make a recording of your friend's Mustang with the blown resonators and then burn it to a CD for your player.

Much cheaper, no performance loss, no bad emission gain.

Vroom! Vroooom!

[unknown007]

Best bet is to make a recording of your friend's Mustang with the blown resonators and then burn it to a CD for your player.

Much cheaper, no performance loss, no bad emission gain.

Vroom! Vroooom!

i want a VH45DE deep tone sorry no ford hahaha

[Infinitiguy19]

Don't mind Qship he is just mad because he has a 96 Q45 (the slowest of the G50's) JUST KIDDING KEEP YOUR COOL

But you can always make custom headers.

but the pre cats are there for emissions they just get rid of some of the co2 before it gets to the cats so by removing them you might clog up the cats faster or not I am not a mechanic yet.

but Qship is right do some of the maintenance and then you will see a difference.

Or just go with a 3 inch exhaust like this guy: http://www.youtube.com/watch?v...lated

But its pretty loud with the muffler off anyways.

[qship96]

You might want to pick up a copy of one of the recent car magazines that have the summry of all the new cars they test.......you will see the 0-60 and quarter mile times of the v6 equipped models of the Accord/camry/altima/g35.etc will be better than any stock{and most modified} 1990-1996 q45.......dont fool yourself,if you beat one of these, it was because they were not racing you.....or felt sorry for you and didnt want to hurt your ego!

[MinisterofDOOM]

You could gut them and no one would ever "know" (unless it severely affected emissions, and even then they wouldn't know why). My headers don't have precats (not even hollowed ones) but I doubt anyone but me will ever notice. The view of the exhaust manifolds is pretty restricted. Unless the person "inspecting" know exactly what they're looking for, they'll have a hard time telling the difference. Of course, Utah emissions laws are definitely nowhere near as strict as CA emissions laws.

A much more effective measure would be to replace the stock manifolds with better-flowing headers. Double benefit there, as you'd be getting rid of the pre-cats as well.

I doubt removing the pre-cats would make much noise difference. They're small and early in the flow. You'd likely get better results from replacing the main cats with high-flow units.

Best bet is to make a recording of your friend's Mustang with the blown resonators and then burn it to a CD for your player.

I take offense at that. My car has high flow cats, no precats, a magnaflow muffler, and sounds FAR better than any Mustang ever dreamed of sounding. The VH's sound is in a whole different category. Granted, V8 Mustangs do sound great...they're just intolerably crude cars.

[Razi]

.Sorry dunno who your raced i beat alot of v6 v4 and some v8.

A V4 huh?

[unknown007]

You might want to pick up a copy of one of the recent car magazines that have the summry of all the new cars they test.......you will see the 0-60 and quarter mile times of the v6 equipped models of the Accord/camry/altima/g35.etc will be better than any stock{and most modified} 1990-1996 q45.......dont fool yourself,if you beat one of these, it was because they were not racing you.....or felt sorry for you and didnt want to hurt your ego!

Yeah sure whatever you say.I never said they didn't keep up for a minute.New cars whoopie doesn't mean old cars aren't faster.Just because your car slow doesnt mean everybody's is.So dont hate because yours gives up on v6's

[TBrack]

A V4 huh?

yea you know the ones in fast and the furious

[unknown007]

A V4 huh?

Yup v4,v6,v8 eh some.Dont under estimate this car.Im not talking about drag racing or track ethier.So maybe its the driver.

[MinisterofDOOM]

Ford actually made a V4 some years back.

[unknown007]

Well now that i think of it forget it you guys dont help.Some do but here we got alot of OEM junkies.While im racing and actually experiencing the power my Q has against other cars, all you believe is some text in a magazine.Good luck with that.

[unknown007]

Ford actually made a V4 some years back.

Aren't the focus V4?

[MinisterofDOOM]

I4, not V4.

[unknown007]

I4, not V4.

Oh yeah hahaha i forgot them types of engines.Well i'll be honest the V6 camry are fast but honestly when will i race one?All i see here are stolen intergra's or intergra's with stolen engines.Ethier way im doing all this for myself so if u can help thanks if you just wanna talk crap like you know go ahead.

Just because one Q45 you owned fails doesn't mean they all do.

Quick question if i was to turbo it dont i need a custom manifold?

i think ima have my freind make me headers.

[maxnix]

A V4 huh?

Ford of England had one in the 60s. The original Mustang prototype was a mid engine V4. Too expensive, so they based it on the Falcon floorpan.

Removing the precats will not improve acceleration performance or sound. 3" exhausts will be very expesnsive and performanc will decrease.

Do more reading here before coming up with hare-brained schemes.

Much more cost effective to put two cards in the spokes if you need the noise to challenge the Schwinns.

Read about the turbo engines by Qisguy and Sijoko. Both are a little ahead of most of us in prototyping skills, neither car is a daily driver, and both are not quite there, but neverthe less interesting.

[qship96]

Yeah sure whatever you say.I never said they didn't keep up for a minute.New cars whoopie doesn't mean old cars aren't faster.Just because your car slow doesnt mean everybody's is.So dont hate because yours gives up on v6's

Guess that means you are either too lazy, dumb, or just to ignorant to pick up a magazine and read a few test results???? My guess{from TRYING to read your poorly composed posts here} is that your car is in much worse operating condition than as it was when it left the factory, and even the current crop of 4 cylinder Altimas, Camrys, Accords would leave you behind......if your engine even started.

[Infinitiguy19]

Dude I must say I have tried to ignore your posts because they just come from a pissed off realtor who is scared to list a name and email. What do you just come here to vent I c'mon can't you do something better than reading magazines about cars that are faster than yours then telling people here that there cars arnt as fast as the one in a magazine. GET A LIFE

[qship96]

The fact that someone like you would search for my name/email.....is psycho and validates my decision to not list it. I guess you are included in the mickey mouse club of the new generation of pimply faced teen owners of automobiles beyond their grasp of understanding and financial means.

[maxnix]

The G50 loses a lot of 0-60 mph acceleration runs, but wins a lot of 50-150 mph ones.

This is old news to anyone who has been here over 3 weeks.

[qship96]

The G50 loses a lot of 0-60 mph acceleration runs, but wins a lot of 50-150 mph ones.

This is old news to anyone who has been here over 3 weeks.

Except to pasta and 007......when you have trouble reading old posts and actually comprehending the information, much less retaining it.....every day is like their first on this board! God I hate stupid people!!!!

[maxnix]

God I hate stupid people!!!!

Which is why I only work in the commercial arena. Not to say there aren't a few Dodos around, but at least I can tell them to take a hike. Can't do that in residential as there are anti-discrimination laws which protect the terminally dumb.

Amazing that so many consumers went for adjustable rate or negative amortization loans. Speaks poorly for the level of instruction of arithmetic in the US. As a Realtor, if I had a client who wanted to buy their residence based on that type of finanacing, I would have given them a 1911A and directed them to the nearest clear field to blow their brains out before they did anymore harm to themselves, their family, and the economy in general.

[unknown007]

Guess that means you are either too lazy, dumb, or just to ignorant to pick up a magazine and read a few test results???? My guess{from TRYING to read your poorly composed posts here} is that your car is in much worse operating condition than as it was when it left the factory, and even the current crop of 4 cylinder Altimas, Camrys, Accords would leave you behind......if your engine even started.

Ignorant no lazy maybe.Reading specs are nothing compared to cars on the road.If you really wanna look like a ***** then i'll prove you wrong.I'll make a video of myc ar running and beinging diganosed.I got code 55 OK and no codes from on transmission.Exterior is in not so good condition and thats how i bought it.My car has 120,129 miles.So keep talking about how bad your car is aint my fault four cylinder smoke you all day.

[unknown007]

Let's start over.Anybody here think it's worth removing pre-cats?

I'm not looking for performance to smoke qship96's 96 Q45.

Magazines huh everything you see in maagzines aint true.Thats a fact.

[maxnix]

Anyone think it is worthwhile to do heroin? I am sure at least one person somewhere does. That that mean it a good idea for you to do it?

Few are aware of the consequences of inane tautologies.

[unknown007]

Anyone think it is worthwhile to do heroin? .

Ecstasy is better!!! hahaha........this has gone way off topic.From pre-cats to magazines to some guy with no basground of even owning a Q45 to drugs

[qship96]

Let's start over.Anybody here think it's worth removing pre-cats?

I'm not looking for performance to smoke qship96's 96 Q45.

Magazines huh everything you see in maagzines aint true.Thats a fact.

You are proving my point about either not understanding what you read or retaining the information, as if you scroll back to my FIRST post in this thread ace, the answer will magically appear......whether you can wrap your little mind around it or not is questionable at best....so far you have obviously failed to get the message.....Do you suffer from ADHD or just overall general stupidity????

[unknown007]

You are proving my point about either not understanding what you read or retaining the information, as if you scroll back to my FIRST post in this thread ace, the answer will magically appear......whether you can wrap your little mind around it or not is questionable at best....so far you have obviously failed to get the message.....Do you suffer from ADHD or just overall general stupidity????

Yeah bro i suffer from add,adhd.stupidity you name it. I'm asking this to someone who's done it not a someone who just reads magazines.Thanks for your time though.