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2.5", 2.75" or 3" exhaust system...thanks!
#23903
12/01/2006 11:55
12/01/2006 11:55
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Anonymous
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Anonymous
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hello everybody.. glad to have finally joined the forum! have got a simple question here and would like to hear opinions before i have the exhaust system installed... currently a stock 20vt coupe... with HKS SSqv BOV and Apexi air-filter installed... gona change the exhaust system next! will be a straight flow exhaust system... the question is, for a coupe of such settings, what is the best exhaust piping diameter should be? 2.5", 2.75" or 3"? no intention of bringing it to above 300bhp... Thanks and regards..
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23905
12/01/2006 12:12
12/01/2006 12:12
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Anonymous
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Anonymous
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thanks saint... however, many have told me that...if i have no intention to mod the coupe up to 300hp, there's no need to install a 3" exhaust...In fact, keeping at 2.5" is the best as it does not lose unnecessary power... do comment....thanks!
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23906
12/01/2006 16:01
12/01/2006 16:01
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Anonymous
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Anonymous
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If ylur after a wee bit of extra 'sound' from the exhaust and want the back sections to last longer you can opt for a Cat-back system which will often gice you a tiny power gain if u rolling road it but i am not sure as to how much, you wouldnt notice it on the road though..
If you dont want to mod your coop then there isnt much point going for a full system or such like IMO.
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23907
12/01/2006 16:28
12/01/2006 16:28
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Joined: Dec 2005
Posts: 2,194 Göteborg, Sweden
Freddan72
Competition Level
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Competition Level
Joined: Dec 2005
Posts: 2,194
Göteborg, Sweden
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You should change the down pipe. The standard is really small, 2.5" all the way to the cat. The exhaust gases are pretty hot and have expanded a lot, so a big down pipe is really good to have. Change it to a 3" and you will have better response and couple of more hp at the end . Have you thought about a metallic cat (i.e. race cat)? Are you thinking about a de-cat system? Cheers Freddan
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23908
12/01/2006 18:28
12/01/2006 18:28
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Anonymous
Unregistered
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Anonymous
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hey guys!
do give me suggestions... currently, all that i have in mind is that.... to install a straight flow exhaust all the way to the muffler... no cat for sure....i'd probably install a straight flow bullet...what say u guys? install a bullet or just let it be straight flow....?
and yea...i was told that putting a 3" exhaust for my current stock coupe will only decrease the power....as the piping will be too big...3" is for only coupes that are above 300bhp, that what i was told. What say you guys? do comment...thanks!
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23909
12/01/2006 18:34
12/01/2006 18:34
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Joined: Dec 2005
Posts: 12,295 Sandhurst
Begbie
Ex El Presidente
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Ex El Presidente
I AM a Coop
Joined: Dec 2005
Posts: 12,295
Sandhurst
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2.5" will give you better torque low down, but will hinder your top end
3" will lose your low down torque will but will have a much better top end
All depends on what you want from the car
Your car is Usain Bolt with wellies
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23910
12/01/2006 18:36
12/01/2006 18:36
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Anonymous
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Anonymous
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yea...i guess...it's a trade-off... thanks!
i believe i know what to do already...! advisable to install a bullet?
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23911
12/01/2006 19:10
12/01/2006 19:10
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Anonymous
Unregistered
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Anonymous
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Also running a decat or such like system will possibly lead to quicker wear on your turbo....
Honestly if your wanting to stay standard then Catback ehausts are the best option
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Re: 2.5", 2.75" or 3" exhaust system...thanks!
#23912
12/01/2006 20:14
12/01/2006 20:14
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Joined: Jan 2006
Posts: 3,034 Sweden
Per
I need some sleep
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I need some sleep
Joined: Jan 2006
Posts: 3,034
Sweden
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Quote:
You should change the down pipe. The standard is really small, 2.5" all the way to the cat.
Well actually, it's more like 2" I'm afraid! In the smallest place. Someone here (don´t remember who) did a measure of his old std. system. True still, it's most important with big pipes when the gasses are hot, i.e. in the beginning...
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