Previous Thread
Next Thread
New Reply
Print Thread
Rate Thread

#293497 Oct 6, 8:26pm
Joined: Jul 2004
Posts: 166
Member
2004 Toyota Celica
Member
2004 Toyota Celica
Joined: Jul 2004
Posts: 166
is it bad for your car to run without the mufflers or run just a straight pipe

Joined: Jan 2004
Posts: 1,417
Specialist
2000 Toyota Celica GT
Specialist
2000 Toyota Celica GT
Joined: Jan 2004
Posts: 1,417
you ll lose back pressure without a muffler and it ll be loud as hell

Joined: Jul 2004
Posts: 166
Member
2004 Toyota Celica
Member
2004 Toyota Celica
Joined: Jul 2004
Posts: 166
I knew that I was really just wondering if it could cause any problems to the car... its just temporary I ordered the n1 exhaust and they sent me world sport so I sent it back and im waiting on the n1...

Joined: Sep 2003
Posts: 3,070
Specialist
2000 Toyota Celica
Specialist
2000 Toyota Celica
Joined: Sep 2003
Posts: 3,070
Shouldn't hurt, it's just illegal.

Go for it, but be careful.


Aqua Teen Hunger Force...number one in the hood, G

Joined: Jan 2004
Posts: 1,612
2low2slow
2002 Toyota Celica GT
2low2slow
2002 Toyota Celica GT
Joined: Jan 2004
Posts: 1,612
anything from the cat back is just sound man, and youll be dealing with a lot of that


[Linked Image]
A boats a boat, but the mystery box could be anything....Even a boat!

Joined: Jul 2004
Posts: 166
Member
2004 Toyota Celica
Member
2004 Toyota Celica
Joined: Jul 2004
Posts: 166
? are you saying that if I leave the cat on I wont loose backpressure?

Joined: Jan 2004
Posts: 744
Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Jan 2004
Posts: 744
Originally Posted by eric_h
anything from the cat back is just sound man, and youll be dealing with a lot of that
Actually, the exact opposite is true. The current group of headers gain almost no power, and the piping from the header to the cat is 2.5", the biggest you want to go on NA. When it comes to exhausts, however, you can gain over 15hp with a catback (Kazuma), and at least 10hp with an axle back (TPR). Not too shabby. wink TPR will come along with the header power soon. thumbsup

Originally Posted by 04silvergts
? are you saying that if I leave the cat on I wont loose backpressure?
Nope, the cat is pretty free flowing already and will hardly affect backpressure. If you go to a 2.5" catback, the reduction in backpressure will hurt low end power, but will make for a better flowing top end. The stock midpipe is pretty free flowing already (resonator is straight-through and perforated), so by adding just an axle back, you can gain low end AND top end, and control exhaust noise at the same time.

Joined: Jul 2004
Posts: 166
Member
2004 Toyota Celica
Member
2004 Toyota Celica
Joined: Jul 2004
Posts: 166
Do you know where I can order a kazuma (I know theyre "offroad use only")... if I didnt care about the noise or tickets wouldnt I be getting a lot more power without exhaust confused

Joined: Jan 2004
Posts: 744
Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Jan 2004
Posts: 744
You can get the Kazuma here for $340:

http://www.trdsource.com/partsintrslts.php?model_detail_id=41&part_type_id=100&parts_id=172

You'd actually lose power by running with no exhaust, since the piping helps the exhaust gas pulses flow and pull each other along (scavenging). Without that, the engine would need to do more work to push the gasses out, resulting in less power than a straight pipe.

Joined: Jul 2004
Posts: 166
Member
2004 Toyota Celica
Member
2004 Toyota Celica
Joined: Jul 2004
Posts: 166
would a custom straight pipe have the same effect as the kazuma

Joined: Jan 2004
Posts: 744
Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Jan 2004
Posts: 744
Yup, as long as it was mandrel bent and used 2.5" piping. It'll be louder though, unless you use a resonator at least as big as Kazuma's.

Joined: Jul 2004
Posts: 166
Member
2004 Toyota Celica
Member
2004 Toyota Celica
Joined: Jul 2004
Posts: 166
mandrel bent?

Joined: Jan 2004
Posts: 744
Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Jan 2004
Posts: 744
Yup, some shops have a mandrel bending machine. It can bend piping while maintaing the same inside diameter through the entire bend. However, most shops have crush benders, which just collapse the pipe in order for it to bend. This causes a ton of restriction, and is good for only OEM replacements on cars that the owners don't really care about performance. Mandrel bending is more expensive, but it's the only way to get decent power out of any exhaust system. All aftermarket exhausts are mandrel bent, including Kazuma, TRD, TPR, Tanabe, Apexi, etc.

Joined: Jul 2004
Posts: 166
Member
2004 Toyota Celica
Member
2004 Toyota Celica
Joined: Jul 2004
Posts: 166
so I could just get a custom straight pipe mandrel bent and it would put out about the same as kazuma

Joined: Jan 2004
Posts: 744
Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Jan 2004
Posts: 744
Most likely. There's nothing really special or power-enhancing about Kazuma that couldn't be reproduced by a decent muffler shop.

Joined: Nov 2002
Posts: 163
Member
Member
Joined: Nov 2002
Posts: 163
I've got a straigt pipe on my car. It's pretty loud and sometimes I get tired of it, but then I just turn the music up. Its also nice to have when people try to out rev you... and when you hit lift. thumbsup

Joined: Sep 2003
Posts: 2,241
Specialist
2000 Toyota Celica
Specialist
2000 Toyota Celica
Joined: Sep 2003
Posts: 2,241
I can hit lift while reving in nuetral smile

I still put down more N/A torque then anyone else just about and I run no muffler smile

beware it will be loud as hell and be heard for a few miles in lift. you have been warned. thumbsup I am however lookin into the tpr exhaust even though I hassle them a lot (it's all outa love smile ) lol

they do after all have the highest dynos so far and is supposed to be rather quiet.


Best 60' 1.959 best 1/4 - 13.7 @ 101mph

Joined: Dec 2003
Posts: 2,670
Specialist
2003 Toyota Celica
Specialist
2003 Toyota Celica
Joined: Dec 2003
Posts: 2,670
Originally Posted by Blue_Bomber
you can gain over 15hp with a catback (Kazuma), and at least 10hp with an axle back (TPR).
thanks, i needed that info... thumbsup

Join the conversation - Register Now or Log In to add your comment


Link Copied to Clipboard
Member Spotlight
Erick
Erick
2001 Toyota Celica GT
Bay Area, CA

Posts: 3,028
Joined: September 2002
Show All Member Profiles 
Recent Topics
Spyder Headlight LEDs
by Dxnxld - Mar 25, 2024 6:51am
Anyone ever hear this noise?
by CeliacCelica - Mar 21, 2024 10:51am
Clunking sound (not sure where from)
by Juliansky - Mar 20, 2024 3:01am
Does anybody know where i can find a S53 trans rebuild kit?
by MoreRamenNoodles - Mar 19, 2024 8:57pm
Urgent
by SoloXKay - Mar 19, 2024 11:58am
OEM speedometer on aftermarket ecu
by Penaman99 - Mar 5, 2024 11:23am
Brake master cylinder
by Nigel100 - Mar 5, 2024 2:45am
7th gen auto rpm dip problem need help.
by ThomasThomas - Jan 5, 2024 2:01pm
Customize Your Toyota Celica Privacy Policy · About · Contact
Privacy Policy · About · Contact
CelicaHobby.com is an independent Toyota Celica enthusiast website. CelicaHobby.com is not sponsored by or affiliated with Toyota Motor Sales, USA, Inc. in any way. The Toyota and Celica names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.
© CelicaHobby.com, 2001-2024
Powered by UBB.threads™ PHP Forum Software 8.0.0
(Preview build 20230331)