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04silvergts
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04silvergts
2004 Silver Toyota Celica
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2004 Toyota Celica

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Dallas, Texas
Oct 6, 8:26pm - #293497 
straight exhaust

is it bad for your car to run without the mufflers or run just a straight pipe

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SmutasticGT
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SmutasticGT

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2000 Toyota Celica GT

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Florida
Oct 6, 8:31pm - #293498 
you ll lose back pressure without a muffler and it ll be loud as hell

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04silvergts
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04silvergts
2004 Silver Toyota Celica
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2004 Toyota Celica

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Dallas, Texas
Oct 6, 8:43pm - #293499 
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...

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slidr
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slidr

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2000 Toyota Celica

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Saint Louis, MO
Oct 6, 8:46pm - #293500 
Shouldn't hurt, it's just illegal.

Go for it, but be careful.


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eric_h
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2low2slow
2002 Toyota Celica GT

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St.George, UT
Oct 6, 9:14pm - #293501 
anything from the cat back is just sound man, and youll be dealing with a lot of that


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04silvergts
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04silvergts
2004 Silver Toyota Celica
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2004 Toyota Celica

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Dallas, Texas
Oct 6, 9:20pm - #293502 
? are you saying that if I leave the cat on I wont loose backpressure?

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Blue_Bomber
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Blue_Bomber
2000 Spectra Blue Mica Toyota Celica
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Freehold, NJ
Oct 6, 9:32pm - #293503 
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.

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04silvergts
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2004 Silver Toyota Celica
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2004 Toyota Celica

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Dallas, Texas
Oct 6, 9:42pm - #293504 
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

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Blue_Bomber
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Blue_Bomber
2000 Spectra Blue Mica Toyota Celica
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Freehold, NJ
Oct 6, 11:06pm - #293505 
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.

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04silvergts
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04silvergts
2004 Silver Toyota Celica
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2004 Toyota Celica

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Dallas, Texas
Oct 6, 11:42pm - #293506 
would a custom straight pipe have the same effect as the kazuma

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Blue_Bomber
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2000 Spectra Blue Mica Toyota Celica
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Freehold, NJ
Oct 7, 12:04am - #293507 
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.

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04silvergts
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2004 Silver Toyota Celica
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2004 Toyota Celica

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Dallas, Texas
Oct 7, 12:24am - #293508 
mandrel bent?

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Blue_Bomber
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Freehold, NJ
Oct 7, 12:37am - #293509 
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.

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04silvergts
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04silvergts
2004 Silver Toyota Celica
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2004 Toyota Celica

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Dallas, Texas
Oct 7, 12:47am - #293510 
so I could just get a custom straight pipe mandrel bent and it would put out about the same as kazuma

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Blue_Bomber
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Freehold, NJ
Oct 7, 2:23am - #293511 
Most likely. There's nothing really special or power-enhancing about Kazuma that couldn't be reproduced by a decent muffler shop.

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Veilside Celica GTS
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Oct 7, 6:58am - #293512 
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

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Lucky_317
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Lucky_317

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2000 Toyota Celica

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Fontana, CA
Oct 7, 1:54pm - #293513 
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
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ragingpaseo
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ragingpaseo
2003 blue Toyota Celica
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towson, md
Oct 7, 2:43pm - #293514 
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

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