AARONSredTYPE-S

found the 63mm(2.5") inlet Greddy Evo2 muffler off of an is300 locally and i can pick it up for $70!!!!
will be doing that on friday unless something crazy happens

brian6speed

iTrader: (5)

like I have said before, p2r used a single 3" exhaust on their time attack accord, they were 3.2 liter N/A and that is the best dyno I have seen for this engine for being both n/a and only 3.2 liters.

You have to keep in mind that setup is for maximum hp at the top end tho. For a street car, without all the engine work, I would think 2.5 is better. Plus for 3" you would need the custom headers like p2r had.

AARONSredTYPE-S

I CONCUR..
I was thinking the exact same thing...thanks man

AARONSredTYPE-S

so i got my exhaust done today and it sounds very good and mellow, even without the resonator. so it is straight 2.5" into a greddy evoII 2.5" inlet off of a is300...
the guys didnt angle it like i told them, they made it flush and straight as it would be if i had duals, so i think it looks like shit...
performance wise, it feels like i may have a bit more torque than i did before but less when vtec hits...dunno, think i may have went too small and should have got the 3" and just added a resonator so it wouldnt be too loud, but that greddy muffles the crap outta the sound, so i may not have needed a resonator...
so in conclusion, the 2.5" isnt bad, but it makes me think i wanna do 3" instead..will have clips up when i go to the track next saturday...

AARONSredTYPE-S

Def. Lost top end, so i want 3"

fsttyms1

i doubt you lost anything. 2.5 is more than large enough for the stock J like yours, especially if not boosted. And without a Dyno there is no way to know the before and after.

dbramaged

Pictures for now until you get the video?

AARONSredTYPE-S

i know my car and how it drives, and i know i lost top end(vtec range), but torque has picked up because there is a little more response in town...hondas always seemed to need a little more breathing and exhaling than other motors...Accord and s2000 guys run 3" all the time and have less power than us na, so i dont think 3" single exhaust is too much, especially resonated with a good muffler...But thanks for your opinion man

Dyno next week for sure to see what im putting down...

StreetKA

iTrader: (8)

you dont need 3" you will loose power and tq... 2.5" is just perfect

JBlueCLS6

iTrader: (2)

Seriously, you can't just eliminate all backpressure.

AARONSredTYPE-S

okay guys, you are right

i have no idea what im talking about

JBlueCLS6

iTrader: (2)

No you don't.

2.5 is good for 250-275 whp. Unless you are pumping out over 350whp you wouldn't need a 3" exhaust.

http://www.autolounge.net/calculator...ustsizing.html

civicdrivr

iTrader: (9)

3" is overkill on my stroked motor. I may gain a few hp up top but the torque loss will suck, and how much time per day do you spend at high rpms? Theres no reason you need it on a relatively stock 3.2l. Its either 1) all in your head or 2) you just need a well engineered, quality exhaust.

Ive been meaning to ask, since you are going through exhaust setups pretty quickly, what type of bends are you using (dont say crush bends, please dont say crush bends)?

Also, have you reset the ECU or at least let it relearn?

AARONSredTYPE-S

look, as i stated many flippin times, the torque on my current exhaust is higher. So in town, this exhaust is probably near perfect for driving casually around town...But, since i am tracking this car every couple months, then its not perfect because my top end has suffered. This is the 5th or 6th exhaust ive had on 2 cars, so i think i know what im talking about.
Im 31 years old, AND im not Jacob and run my damn mouth on here without experience, so please give me your opinion, but dont act like im a f'n idiot...
this conversation is obviously going the wrong way, so ill just end it....thanks 4 your input guys...

AARONSredTYPE-S

Here ya go. As you can see, the is300 muffler is slightly larger than the one for the accords


until i black out the bottom of the bumper with vinyl

civicdrivr

iTrader: (9)

Once again, crush bend piping or mandrel? What cat are you running?

AARONSredTYPE-S

Mandrel from the cat to the axle, then i believe it looks like crush bend at the muffler...
stock cat.

I am gonna do a hfc and possibly 2.5" collector on the headers, so it is a true 2.5" all the way back, which will be probably much better...

Sorry for going off earlier, i just get pissed on here sometimes because there are some real idiots on here, and i dont consider my self as one, and i feel some people thats been on here just as long as me try to talk down to me...

So, looks like i am gonna try this route^^^^ before i jump the gun on the 3".

brian6speed

iTrader: (5)

I think if you went 3" it would just get worse. I would assume your exhaust is bottlenecked at the header collectors and cat, that is probably why you aren't happy with the power.

civicdrivr

iTrader: (9)

Yea, your exhaust is 2.5" at the collector to a 2.25" cat to 2.5" from there to a 2.36" muffler (it was a pain in the ass to find, but the Greddy EvoII is300 muffler is 60mm). There are some definite bottlenecks there.

JBlueCLS6

iTrader: (2)

dbramaged

Well, it looks like the 75mm HKS Carbon-Ti won't be on my car either. I originally ordered it almost 45 days ago. They finally said that they can't continue with the order at the price they sold it to me for and can either give me a refund or charge me an extra $150 to make up for the difference. So, I'll be getting a refund and looking to probably just get the regular Ti or the APEXi N1 in 75mm. I'm going to order another header and chop it up to have 3-1 w/ 2.5" collectors and then 2-1 3" collector with a hi flow 3" cat and a vibrant 14"x3" resonator. If it works, then great... If I'm not happy with it, it will end up on the black market for sure. lol

Basically:
HKS Titanium Muffler 75mm (60mm pictured)


Vibrant 1142 3" Ultra Quiet Resonator


Vibrant 46566 3"x6" Flex pipe (for the header)


Vibrant 7039 3" in/out Ceramic Core Hi Flow Catalytic Converter
(I was looking at their Full Metal race for higher flow, but can cause CEL)


and plenty of Vibrant piping:
2x 3"x5' straights
3x 2.5" every bend (1x45° & 1x180°) to custom fab the header

I was going to do the 2.5" like yours(aaron's) but have my friend that has his own Meineke weld it up for cheap. But after looking at everything. I just think I would like to try the full true 3" and see what happens. I've been going back and for far too long on it really.

I may order some of Vibrant's 4" stainless bends and do a gradual decrease to 3" to make a custom intake as well. (not likely though)

AARONSredTYPE-S

WELL, I get ya brother...
I guess my research and measurements were wrong on the muffler inlet. The piping that was on it was 60mm, but im 99% sure once that was cut off, the inlet on the muffler itself was 2.5"...dunno, but if so(60mm), it will be replaced later

So, do you agree with me on my future plans with the exhaust then? meaning hfc and such?

civicdrivr

iTrader: (9)

Absolutely. The stock cat wouldve been ditched at the same time as the rest of the exhaust if I were you.

AARONSredTYPE-S

it was debateable to me until ive been driving the car.
I found a 2.5" inlet/outlet cat(not test pipe) i was gonna get a while back, i was just worried about throwing a code...hondas are funny about those things, but i will give it a try...and you think the b-pipe or header collector if you will, is 2.5" already? if so, then the only things are a new cat and bigger inlet muffler(maybe)...
thanks for your opinion and advice...

AARONSredTYPE-S

that resonator needs to be about 18-22" long with 3" straight and that small of a muffler...it will be too loud if not man...gl brother

brian6speed

iTrader: (5)

Adding that thank you option is kind of stupid, makes the forum feel more like a high school popularity contest.

civicdrivr

iTrader: (9)

Im under the assumption that your b-pipe has already been replaced with 2.5" piping. If not, Im really confused by your setup but I would understand why you arent feeling any gains. The XS header collector is 2.5".

AARONSredTYPE-S

The pipe that has the flex on it where both manifolds meet and go to the cat, is what im talking about...it hasnt been modified. it is the original xs power full set-up to a stock cat, then my 2.5" exhaust pipe to the greddy muffler...
i had power gains up top with my last exhaust that i just replaced, which had a single 2.5" inlet, dual 2.5" outlet muffler...

OperationDarkie

iTrader: (1)

I still think on a street daily driven car with just bolt ons so to speak a catback exhaust is just fine, I mean aren't these catbacks tested before they are just casted up?, Why not just buy an electric cutout? that will totally solve your exhaust problem right there.

AARONSredTYPE-S

cheapie cat...from 98-02 accord?

http://cgi.ebay.com/ebaymotors/98-99...Q5fAccessories

dbramaged

Somehow, vibrant figured out how to make a extremely good resonator in a smaller package. They nbake the longer, more narrow ones, but this one works better. My buddy is running it on his supra and swears by it. Lol

civicdrivr

iTrader: (9)

The XS collector is 2.5". Your cat is the bottle neck.

Most of the catbacks for our car are for sound.

rush

iTrader: (1)

Said it a million times I hust picked up another Cl 6spd & plan on doing the same exat thing no trial error again

civicdrivr

iTrader: (9)

Why did you get another CL?

AARONSredTYPE-S

BECAUSE ITS THE BEST BANG FOR THE BUCK CAR OUT THERE IN THE 10K OR LESS CATEGORY..IM ASSUMING

Crazy though because i thought he said he wanted a 350z just like i did, could be mistaken

AARONSredTYPE-S

true and true....

CH46ESeaKnight

If you dont care about passing emissions or the legality of it, that so called cat should do. I don't see enough (Honey Comb) surface area for the gasses to pass over to create the reaction needed. I'd bet you a a Jackson that it will throw a code. Also its a bit strange that the o2 sensor is in the middle of it. Looks more like a test pipe/ resonator to me. Just enough to pass the visual inspection. Of course there are ways to make the car burn clean for a emissions test with out a cat.

I kinda like the idea of the electric cut out for your track days. Provided there is not noise restrictions at the track you run.

AARONSredTYPE-S

yeah, that wasnt a bad idea with the cutouts, and there is def no restriction in any way at the track near me...

You are also probably correct on that cheap cat i found, and i will do more research. i just didnt wanna spend 300-350 on a damn cat from xlr8, but may have to if everything else is gonna throw a code...florida doesnt have emissions checks at all, but i dont like driving around with that damn light on and it probably would throw other things off as well because of the ecu trying to compensate...thanks man

Anyone know the length of our stock cat.?

civicdrivr

iTrader: (9)

Just get a universal Magnaflow.

AARONSredTYPE-S

i have never used one. obviously magnaflow is a trusted name, but i thought from your research the magnaflows were not a hi flow cat?