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Joined: Dec 2003
Posts: 18
Cableguy
Member
Cableguy
2000 White Toyota Celica
Member
2000 Toyota Celica

Joined: Dec 2003
Posts: 18
Malta
Jan 26, 3:54am - #91107 
Catalyiser

Hello dudes.

Just wished to ask if the removal of the catalyser for Celica GTS will help exhaust flow or not. I heard a lot that celicas need back pressure on the exhausr system and thus removing the cat will not help performace. IS this true?

If i go for a Cold Air Intake shall i choose TRD(Injen) or AEM? Do they perform the same or one is better than other.

I would like to know if the TRD Muffler is a good exhause replacement choice? If i have the TRD body kit shall i go for the extended lenght?

Thanks a lot for the help

Cable smile
GTS LOVER

Joined: Aug 2003
Posts: 2,269
NorwayGT
Specialist
NorwayGT

Specialist
2004 Dodge SRT4

Joined: Aug 2003
Posts: 2,269
Seattle, WA
Jan 26, 8:03am - #91108 
Injen gives better HP gains at the top of the RPM range, so if your going to race then i would get that, TRD exhaust is great, and yea, if you have the action package then you want the extended exhaust


was....5speed with i/h/e
15.41 @ 89.30mph 2.282 60'

is....04 srt4 stock
13.936 100.15mph 2.177 60'
Joined: Dec 2003
Posts: 18
Cableguy
Member
Cableguy
2000 White Toyota Celica
Member
2000 Toyota Celica

Joined: Dec 2003
Posts: 18
Malta
Jan 27, 12:09pm - #91109 
Thanks a lot mate. Where can i find soem good info on the Injen(TRD badged) Cold Air Intake please. I cannot find some graphs of the average boost.

And is it true that the celica engine prefer lots of back pressure at the exhaust side. My friend told me to remove the catalyiser for a good cheap boost and some one else told me that if i remove it(even if i keep the lamba connected properly) i could loose power because the engine needs back pressure.

Can someone please comment on this???

Thanks

Celica 2000 GTS -- MALTA -- Europe --

Joined: Nov 2003
Posts: 242
hybridcelica
Member
hybridcelica
2000 silver/blue Toyota Celica
Member
2000 Toyota Celica

Joined: Nov 2003
Posts: 242
virgin islands
Jan 27, 8:45pm - #91110 
Originally Posted by Cableguy
Thanks a lot mate. Where can i find soem good info on the Injen(TRD badged) Cold Air Intake please. I cannot find some graphs of the average boost.

And is it true that the celica engine prefer lots of back pressure at the exhaust side. My friend told me to remove the catalyiser for a good cheap boost and some one else told me that if i remove it(even if i keep the lamba connected properly) i could loose power because the engine needs back pressure.

back preasure robs horsepower.its when you remove or add stuff to the exhaust that prevents flow (rapid exhaust gas movement)thats when you lose hp and torque.
about the catalyst,if you remove it you will pick up a few hp providind you:
1: weld in the proper size pipe
2: make sure the pipe is opened at the top(down pipe goes into it)
3: the pipe being put in goes into the mid pipe.
4:weld it properly (smooth welds,with little or no restrictions on the inside of the pipe.
5:you get a device that can duplicate the signal of a perfect working catalyst (or your o2 sensor would trigger a cel with the ecu)

some of the commom mistakes people make with removing the cat is,to replace it with a cat they think is a higher flowing one than stock(the stock cat is extremely good)
and they chisel out the material and leave the empty hollow pan.looks like its in but its actually out.not good in the case of the celica,as a matter of fact no celica gt or gts from 1990 to present.(the cat is so fat that when its chisseled out and left empty the massive preasure drop across the length of the cat cause the gases to slow drastically which cause loss in performance and increase backfiring.
so,you want cheap hp.cut the cat out,but do it right. and get the AEM Intake to me they work better if you are going to go extreme on the exhaust side.

Can someone please comment on this???

Thanks

Celica 2000 GTS -- MALTA -- Europe --


HYBRID:resulting from the combination of two or more mechanically dissimilar origins!
"...... code":every man is a shadow,let him be treated as such,until proven otherwise by a show of character or code!
Joined: Nov 2003
Posts: 242
hybridcelica
Member
hybridcelica
2000 silver/blue Toyota Celica
Member
2000 Toyota Celica

Joined: Nov 2003
Posts: 242
virgin islands
Jan 28, 10:14am - #91111 
if you want anything clarrified i can,and will be glad to.
anything for more speed,whether its me or anybody else for that matter. thumbsup


HYBRID:resulting from the combination of two or more mechanically dissimilar origins!
"...... code":every man is a shadow,let him be treated as such,until proven otherwise by a show of character or code!
Joined: Nov 2003
Posts: 242
hybridcelica
Member
hybridcelica
2000 silver/blue Toyota Celica
Member
2000 Toyota Celica

Joined: Nov 2003
Posts: 242
virgin islands
Jan 28, 10:19am - #91112 
Originally Posted by hybridcelica
Originally Posted by Cableguy
Thanks a lot mate. Where can i find soem good info on the Injen(TRD badged) Cold Air Intake please. I cannot find some graphs of the average boost.

And is it true that the celica engine prefer lots of back pressure at the exhaust side. My friend told me to remove the catalyiser for a good cheap boost and some one else told me that if i remove it(even if i keep the lamba connected properly) i could loose power because the engine needs back pressure.
(QUOTE)Celica 2000 GTS -- MALTA -- Europe --



back preasure robs horsepower.its when you remove or add stuff to the exhaust that prevents flow (rapid exhaust gas movement)thats when you lose hp and torque.
about the catalyst,if you remove it you will pick up a few hp providind you:
1: weld in the proper size pipe
2: make sure the pipe is opened at the top(down pipe goes into it)
3: the pipe being put in goes into the mid pipe.
4:weld it properly (smooth welds,with little or no restrictions on the inside of the pipe.
5:you get a device that can duplicate the signal of a perfect working catalyst (or your o2 sensor would trigger a cel with the ecu)

some of the commom mistakes people make with removing the cat is,to replace it with a cat they think is a higher flowing one than stock(the stock cat is extremely good)
and they chisel out the material and leave the empty hollow pan.looks like its in but its actually out.not good in the case of the celica,as a matter of fact no celica gt or gts from 1990 to present.(the cat is so fat that when its chisseled out and left empty the massive preasure drop across the length of the cat cause the gases to slow drastically which cause loss in performance and increase backfiring.
so,you want cheap hp.cut the cat out,but do it right. and get the AEM Intake to me they work better if you are going to go extreme on the exhaust side.



HYBRID:resulting from the combination of two or more mechanically dissimilar origins!
"...... code":every man is a shadow,let him be treated as such,until proven otherwise by a show of character or code!
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