optimal size exhaust for...

[clutch]

hey guys im looking at upgrading my exhaust, i want something with a nice note but dont want it to big, what size should i look at? i was thinking 2.25 inch.

also would 2.25 inch suite some extra power mods? im not looking at doing much just a bit on the intake.

cheers!

[aaronng]

What car and what engine and what mods?

[ninzee]

if its just an intake then 2.25" would be perfect or you could also go with 2.5" that seems to be pretty popular too

[clutch]

its a 93 EG VTI Civic hatch, also im looking at doing the extractors! i realy dont want a boring constant brrrrrr noise thats all, thats why i didnt want to go to big, i want it to have a nice note and a bit loud! :D lol

P.S what engine is in this model? is it the b16a?

[imratedpg]

its a d16y

[clutch]

ok, has anyone had both size exhaust? i know there isnt much difference in 2.25 and 2.5, but what would sound better as far as note goes, not constant low tone?

[aaronng]

ok, has anyone had both size exhaust? i know there isnt much difference in 2.25 and 2.5, but what would sound better as far as note goes, not constant low tone?

If it is a D16Y, then either a 2" if you are keeping the engine stock or 2.25" if you are going to replace the cams, valvetrain and run at higher RPM.

[clutch]

Ok no worries, wats the stock size on there at yhe
moment? also will 2inch make it much less louder than 2.25?

Also should i look at a new muffler? If so wat type? Sorry guys im pretty nooby with this but dony want to buy the wrong thing

[Limbo]

stock size is like 1 1/2" or so.

Muffler depends what you like bling bling canons or something quiet.
Smaller sizes are usually more quiet. But it depends on the reasonators & mufflers you run in the end.

[clutch]

Um i dont realy care about the style, i just want a good note and loud noise :o so u think the canons r the best bet?

[lookingforboost]

2.25 inch piping and an oval muffler to get a nice note cannons sounds ricey and crap :P
dont get some cheap $60 dollar crap either get a decent muffler

[clutch]

An ovel muffler? Got a pic or example? A website to purchase from would b sweet lol

thanks heaps!

[aaronng]

Um i dont realy care about the style, i just want a good note and loud noise :o so u think the canons r the best bet?

Make sure you stay below 90 dB at 4-5000rpm though.

[clutch]

haha yea ill try.... :P

[fatboyz39]

2.25' for a d16y1

[NSPYRE]

stuff getting a muffler, just get a straight pipe tip

http://www.synicmotorsports.com/images/BC_Spec2.jpg

[dougie_504]

Because the D16Y1 is a smaller engine with the SOHC I'd say 2" is enough.

You're best off going to a local exhaust shop and asking them to make you up a full mandrel-bent exhaust system from front to back, including headers. Should cost $1,500-$2,000 depending on quality, but to be honest there's no substitute for quality so it's best to pay good money.


For me I prefer a nice intake sound as opposed to an exhaust sound (although this tends to lead to less-disciplined driving and worse fuel economy) so I stuck in an APC short ram intake on my EH VTi (sedan model of your hatchback civic) but in my CRX SiR I've gone with the cold air intake.

If you want more power then do your intake first. It's cheaper and easier. Short ram is bugger all power increase but a great sound, and cold air intake will give you a little boost but maybe not as loud as the short ram (due to location of your pod filter - assuming you relocate it to your bumper).


Do your exhaust after intake I suggest, but do the whole thing and do it properly.

[NSPYRE]

^^^

hmm.... my injen CAI roars as opposed to my GF's AEM short ram.

wat drugs are u on? f*ck spending up to $2,000 to get some exhaust shop to make u a full system. most decent branded off the shelf exhausts (SS mandrel bent) can be had for around $800 - $1000 like Fujitsubo, 5Zigen, Reinhard and the list goes on. as for headers, u can get a good set for about the same price range. why get some exhaust shop who hasnt invested in R&D to make an exhaust that u may not even kno will work all that well. sounds really stupid to me.

[dougie_504]

Why so aggressive? Do you and your GF drive the same car? After changing the short ram on my CRX to a CAI I'm of the opinion that it's not as loud because the pod is further from the cabin, and I've had several people in CRXAustralia concur with that. It's all opinionated.

As for the exhaust a shop can supply you with extractors, flex, high flow cat, resonator and a twin loop rear muffler, including professional fitment (thread starter stated he's new to the mechanical scene!) for around $1500-$2000. And if you're concerned about the quality of their worksmanship then you should probably be shopping elsewhere, at a place that's well-recommended to you by people you trust.

There's no need to stick to the brand-names if you ask me.

[NSPYRE]

i dont mean to have a go at u, and yes, both me and my GF have DC2 integra's.

how much time and dollars do u think these exhaust shops will have put into making 1 set of custom headers as opposed to a reputable company like TODA or 5Zigen who have produced into the tens of thousands and have their company's name and reputation on the line? think about it.

in addition, the more hands the parts pass through, the more its going to cost. in other words, why buy through the middle man? headers, mufflers, etc etc will cost a whole lot cheaper by buying from the traders off here as opposed to a workshop

im not saying custom made cat-back's are a bad idea, but they can be made for like $500 - $600 from a reputable workshop (mild steel). if u get it made of stainless its going to cost the same as an off the shelf item so why not just get a branded one.

as for headers, i wouldnt touch anything that was custom made or not branded. been there, done that, learn from experience. im just trying to give the OP a heads up on wat NOT to do

[ninzee]

hey if u want some bang for buck headers ebay has some gr8 tri y headers that i brought, they arrived today payed about $340au deliverd stainless steel but there 2.5"

[EGJOE]

If press bent go for 2.5'
If mandrel bent go for 2.25'

save some cash and get 2.5 press bent will do the job, have had this on a vti sedan before.

[dougie_504]

If press bent go for 2.5'
If mandrel bent go for 2.25'

save some cash and get 2.5 press bent will do the job, have had this on a vti sedan before.


And how did it go? Flow a lot better? Noticeable gains?

[EGJOE]

Back when I was younger, use to do cheap mods that worked.
The vti I used high flow cat, 2.5' press bent with rear muffler(second hand from import place), coldair intake pod in gaurd, advanced the timing 5 degrees and only used 98 OCTANE fuel.

The combination was quick enough to beat the average bogan commodore,sss pulsar, some dohc crxs. It sounded nice as well but i guess that comes down to what muffler you choose. Second hand japan made ones are cheap are heaps better quality then ones from your local muffler shop. Look for one with jasma logo on it.

[dougie_504]

Back when I was younger, use to do cheap mods that worked.
The vti I used high flow cat, 2.5' press bent with rear muffler(second hand from import place), coldair intake pod in gaurd, advanced the timing 5 degrees and only used 98 OCTANE fuel.

The combination was quick enough to beat the average bogan commodore,sss pulsar, some dohc crxs. It sounded nice as well but i guess that comes down to what muffler you choose. Second hand japan made ones are cheap are heaps better quality then ones from your local muffler shop. Look for one with jasma logo on it.


Yeah I've considered doing some budget bolt-ons for my EH VTi. Nothing expensive because seriously it's SOHC and you can't really get shit out of it unless it's F/I.

Any rough idea how much for a high flow cat, 2.5" press-bent, to the back? I've just got a 3" APC SRI atm that I can always extend down into my bumper with another piece of piping from an exhaust shop or w/e and headers I'd probably just get some cheapo ones with a larger collector on eBay and work them a bit myself so that they fit properly...

[Timmy_B]

IMO 2" pipes and muffler. Magnaflow i hear has a good sound to em..

[SHU-ES1]

a magnaflow hiflow cat usually goes for around $200-250, and depending on the steel you want to use and the way you want the pipes bent will determine the cost. i got quoted yesterday for a 2.25" catback made from mild steel press bent with muffler and resonator supplied for around $280, cheaper if i supply my own. if you're in melb, pm me and i will let you know who gave me the quote. i just picked up my own 100cpsi hi flow cat for my d17 and i can feel the engine revving easier and smoother, but has made my apexi cannon rattly and fart like crazy. i'm going to swap over to magnalow flow oval muffler with 4" tip. they let out a nice deep smooth tone if thats what your after.

[tekung89]

2.5 press bent cat back and a nice quiet muffler, twin loops or oem type R muffler

[SHU-ES1]

speaking of mufflers, does anyone know how restrictive the oem ep3r muffler is? might end up just using that if its not much diff to a magnaflow one.