Straight pipes??

*wmtom* · 05-14-2005, 12:20 PM

anyone here in NC know if straight pipes are legal?

CTU 24 · 05-15-2005, 12:48 PM

If you're talking about running them from the headers back, which removes your cats.

Yes, it's illegal.

TOK · 05-15-2005, 06:32 PM

Quote:

Originally Posted by CTU 24

If you're talking about running them from the headers back, which removes your cats.

Yes, it's illegal.

Horrible sound, too. Straight piped race engines sound great at 5000RPM, but they sound like crap in the RPM ranges our trucks are typically cruising in (1500-1800rpm).

ChadEberly · 05-15-2005, 09:26 PM

it is illegal to replace anything befor the 02 sensor, and yeah our trucks sound likes shi* with the pipes off i had mine off for a day while working on (straight pipe resonator mod) and it sucked...plus hurts the gas mileage too. But technically ive always heard that if you remove cat no matter what its illegal and if you run straight pipe from the cat then its legal as long as you pass emissions

Timba24 · 05-15-2005, 11:19 PM

well I had dual 2.5" straight pipes with a h-pipe and man everywhere I went people turned their heads gave me compliments and asked about it, it also set off car alarms and was heard from well very far away. It pops a lot but sounds cool think of a harley sorta. I just welded in a magnaflow since I will be towing a boat and dont think that would be a very fun trip with those pipes. I am however going to put in cut outs or dumps that I can open when I feel like bein really loud.

pciley · 05-16-2005, 08:54 PM

Did you replace the secondary cats / resonators with straight pipes, or the primary cats up by the manifolds?
It sounds like you just did the "resonator delete":
3" Straight Pipes Installed

Timba24 · 05-16-2005, 11:07 PM

no I just had them from the resonators back straight pipes with out the resonators I wasnt brave enough

*wmtom* · 05-17-2005, 12:44 PM

i was only thinkin of gettin rid of the muffler, id keep the cat, but if it sounds like crap i wont bother, i may wanna get rid of the second set of cats tho (4x4). and that cut-out idea doesnt sound to bad either

Timba24 · 05-17-2005, 12:56 PM

it doesnt sound like crap like I said it sounds badass and will turn more heads than any other truck on the street however dont just pull of the stock exhaust and have it poor from the resonators as then its dumping right under the cab and will be way to close for comfort. also make sure to put a h or x pipe to help get rid of some of the rasp it has without it

if anyone can host a video for em I have a little fly by my friend took I could have him email it to someone

*Squid* · 05-17-2005, 01:29 PM

Quote:

Originally Posted by Timba24

it doesnt sound like crap like I said it sounds badass and will turn more heads than any other truck on the street however dont just pull of the stock exhaust and have it poor from the resonators as then its dumping right under the cab and will be way to close for comfort. also make sure to put a h or x pipe to help get rid of some of the rasp it has without it

if anyone can host a video for em I have a little fly by my friend took I could have him email it to someone

Free video hosting.
http://www.putfile.com/media.php?n=106_0604

rholland · 05-17-2005, 02:05 PM

I had mine off at the resonators to install a new cat-back system and found that I was 1 piece short of having everthing that I needed for the new system. Drove it to work and back, 60 miles with no exhaust . It ran OK, but had no power taking off.

*wmtom* · 05-17-2005, 02:58 PM

that was my next question, would i loose power, i guess thats my answer lol

Timba24 · 05-17-2005, 03:42 PM

ya going from the pipes to welding in a muffler my bottom end feels a little better now so I will let you know if it affected my times at the track I should be going again this weekend. I will also work on getting the video up.

there's a funny story behind the video we were having a bbq for my shop openeing and I had ran to the store, well on my way back I see my friends stranding in the street and videoing our friends car driving by so I floor it and do a fly by for the camera and past the car ill try to get the video up so you guys can hear it and also laugh your heads off about it lol

pciley · 05-17-2005, 09:42 PM

Without the muffler, of course you would lose power. You need a bit of back pressure for the low end. If you had a supercharger or turbo setup, I could see having dumps or something, but ONLY if you were going to spend all your time near redline. Otherwise you are just hurting yourself.
If you are making the Titan into an NHRA drag truck, maybe go with open pipes. For daily driving, performance would only suffer.

Timba24 · 05-17-2005, 09:52 PM

actually a turbo setup you want the least backpressure possible

anyways heres part of the vid http://www.putfile.com/media.php?n=MOV0022948

in the beginnig I had gotten on his *** and let off then when I pass the camera you can hear me start to get back on it it doesnt show me pass him but trust me I did lol