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Joined: Oct 2004
Posts: 39
nvyseal2332
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nvyseal2332 Jan 31, 2:08am - #388289 
2000 Midnight Blue Toyota Celica
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2000 Toyota Celica

Joined: Oct 2004
Posts: 39
North Carolina
hi flow cat?

any advantages with using a hi flow cat on our cars? would it help any or just change the sound?
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Chaz
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Chaz Jan 31, 2:14am - #388290 
2000 Silver Toyota Celica GT
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2000 Toyota Celica GT

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DFW Texas
won't do either from what I have heard. Our cats are pretty high flowing already.

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XxMerlinxX
Senior Member
XxMerlinxX Jan 31, 4:15am - #388291 
2000 Silver Toyota Celica
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2000 Toyota Celica

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Hartsville/Greenwood, SC
Originally Posted by Chaz
won't do either from what I have heard. Our cats are pretty high flowing already.


Exactly, your aftermarket "hi-flow" cat might actually be more restrictive.

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c4justin
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c4justin Jan 31, 4:16am - #388292 

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2000 Toyota Celica

Joined: Oct 2004
Posts: 163
Texas
i was told the same thing that Chaz said! That the celica has a very high flow cat already..
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Speed4TheNeed
Caleb
Speed4TheNeed Jan 31, 5:30am - #388293 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
almost everything stock in the celica is made pretty good. for instance, a manual gts rates at 180 bhp, and dynos usually throw it around to the 160 whp mark...a loss of only 20 horsies in this case in considerred EXCELLENT.

there is always and definately room for improvement though. i was just making the point that the celica is put together very well from the get-go.

a highflow cat (such as magnaflow's) wouldn't hurt though...it's not more restrictive, but it's not much more free-flowing, either. it'll help, but only a little. this may or may not be worth the $$ to you.
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Shiftyz1x
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Shiftyz1x Feb 1, 1:32am - #388294 

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2003 Toyota Celica GT

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WV, USA
^ nicely said thumbsup
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Polykarb
Metal Storm 2040
Polykarb Feb 1, 1:41am - #388295 

Metal Storm 2040
2000 Toyota Celica

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Tampa, Florida
i think "High Flow" for anything in the exhaust path is a waste of money if you put it on our cars. Really wouldn't make a noticable improvement.

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SLVCELI
Specialist
SLVCELI Feb 1, 1:49am - #388296 
2002 Liquid Silver Metall Toyota Celica GT
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2002 Toyota Celica GT

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Posts: 1,304
West Chester, Ohio
Would buying, say the maganflow cat that will fit our cars the best give out less emissions and also keep the performance the same (or better) or is it generally if the less you pollute, the more power you lose?

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Speed4TheNeed
Caleb
Speed4TheNeed Feb 1, 12:52pm - #388297 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Originally Posted by Polykarb
i think "High Flow" for anything in the exhaust path is a waste of money if you put it on our cars. Really wouldn't make a noticable improvement.


i don't understand what you are saying

the trial & dc sports header are 'high flow' and they give out usually 7-9 whp

almost all exhaust systems are 'high flow' and they give out around 3-5 whp


anything that is less restrictive = better, as a rule of thumb thumbsup
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Speed4TheNeed
Caleb
Speed4TheNeed Feb 1, 12:56pm - #388298 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Originally Posted by SLVCELI
Would buying, say the maganflow cat that will fit our cars the best give out less emissions and also keep the performance the same (or better) or is it generally if the less you pollute, the more power you lose?


it would give out about the same emissions, and performance would be the same or better.

and yes..generally, the more you pollute the more power you have. that's just the nature of the beast. it's not saying that pollution = more power, it's that way because we try NOT to pollute. so to NOT pollute more, we put things (such as our catalytic converter) in our exhausts path that restrict the exhausts flow..which decreases power.

supposedly in the future, we will run off of hydrogen (at least thats what they are trying to do) so there will be no harmful emissions which therefore means we won't have a cat at all.
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