Slow and steady H22A build for EG

[hayashi_1986]

Hiya,

I thought I might post up a little something since I've stopped working on the H22A for a while now. Not many people know about it yet since I haven't spoken much...progress has been really slow after starting full time work so yah :( But, now working full time...I've got some money now to continue it over weekends hehe...When I'm not with my GF that is lol

So yeah, here's what I have so far:

H22A1 Stock Bottom and Top End
Stocky Gearbox (couldn't get an LSD box :( rare as)
Skunk2 IM
Skunk2 66mm TB
JVT Header 4-2-1
OBX LSD (on order)
Avid Racing Mounts
Koyo Manual Tensioner Conversion Bearing + Kit from Honda

I've hit a snag and I'm sort of unsure what diameter to use for the remainder of the exhaust. I'll be using a metal cat from X-Force, so now I've gotta figure out what diameter I need. Would 2 1/4" been fine? Or do bigger engines like the H22's like something fatter...like a 2 1/2"?

Hopefully I can get all this on the road with a new re-spray at the end of next month!

Thanks in advance for your help!
Nick

[nigs]

Three.

Do it.

[Benson]

2.2l needs at least 2.5inch

[hayashi_1986]

Sweet as. 2.5" seems the go...3" is a little big isn't it? lol I figured it'd be for hipo boosted cars?

[Mitchman]

yeah to big unless its for drag I'm sure that header I'd 2.25" at the merge so that will hold it back if u do any head work

[hayashi_1986]

Ah k, I see what your getting at. I'll leave this thread open for a bit more discussion before I take the dive :) Thanks for your advice mate :thumbsup:

[fatboyz39]

ill be going 3' on my h22a. 2.5' is just weak! but in your case.. 2.5' for sure. I use a 2 1/4 on a 1.3L. No loss in power.

[ALLMTR]

Yep too big is a myth

[PNS 001_EG3]

i was going to build a h22a and sold it as im now looking for a kswap. when looking in to headers and exhaust. i was going to run lov fab with a 2 1/2 inch. this was from some great advice, but my only problem was a standard 2litre k would run a 3 inch no worries, yes it revs a little harder but im sure this will give you something to think about. if your doing some light mods just go a three.

[grumpy rooster]

3" is best.

[hayashi_1986]

3" it is then, gonna have a sports muffler hooked up instead of a cannon...Got EPA'd recently lol Nice cop though, talking cars with him :thumbsup:

Probably just get a gutsy sounding twinloop or one of these:

Sexy (http://www.modacar.com/Merchant2/graphics/00000002/apexi_noir.jpg)

Whatcha think? Noice ain't it? :)

Thinking of ordering a shorter gear set for the Accord box I'll be fitting. Heard they're quite long...and better for turbo's?

[EKVTIR-T]

That muffler is nice man.
What's the price on them?and inlet sizes?

[hayashi_1986]

Not sure buddy lol But I figure it's got a decent price tag being A'Pexi n' all. I was thinking of taking that pic to the exhaust shop to see if they could match one up that'd be similar :)

[EGJOE]

3' but clearence becomes an issue on dumped eggys

[hayashi_1986]

3' but clearence becomes an issue on dumped eggys

That's what I'm afraid of...My EG is decently low...but not extremely and around my area there's plenty of speed humps.

Other thing I forgot to mention was that it's daily driven and I'm aiming to keep the noise levels down...not stock, but not so loud either. Like I said, EPA'd recently so I'll have to get it done like that anyway lol

Cheers
Nick

[EGJOE]

All depends on what your main goal is like outright power the youd want 3inch.

I had 2.5 on my JDM prelude and that worked quite well although that was pretty much straight pipe work no muffler.

3inch definatly gonna be loud.:thumbsup:

[hayashi_1986]

I'd like 3inch, but I don't want to risk getting busted again. Just want a mildly tuned car...in saying that, 2.5" is sufficient I reckon. Will be seeing the track here and there but nothing major :) Next thing to do, fix up the gear box with the LSD...which, to my disappointment hasn't arrived yet :(

[EGJOE]

LSD ftw, once you got one theres no turning back!!!!
What brands the LSD your getting?
Make sure you use some top quality gear fluid with your new lsd buddy, someting like endless.

EGJOE:thumbsup:

[VTECMACHINE]

What LSD? - if cusco only use, cusco oil, or Motul FWD type II LSD oil.

[preludacris]

im pretty sure 3 inch is way to big for a h22a...

[Mitchman]

big exhaust = less exhaust gas velocity which at lower rpm will not be as beneficial as a 2.5" unit. If you can max out the flow capabilities of a 2.5" i would be very impressed.

[imratedpg]

im in a similar situation hey, dunno if i wanna go 3" or 2.5". Originally i was gonna go 3" and i bought a 3" metalcat n muffler relying on the info off honda-tech, the guys over in the states.http://www.honda-tech.com/zerothread/2197695 influence from friends was a major factor as well lol. but i didnt want a obnoxious noisy exhaust so i sold the 3" stuff and now im back to square one, contemplating between 2.5 or 3. maybe both? like 3" from header to cat then 2.5" to muffler lol? hahaha collector size is important as well.

one of the dyno graphs shown is 2.25" vs. 3"
http://i258.photobucket.com/albums/hh275/eg8sir/tuned2_5Vstuned3.jpg

but thats comparing 2.25" vs. 3" not 2.5" vs. 3" so cant tell if to go 2.5 or 3 but defs not gonna do 2.25!

someone with a 2.5" and 3" exhaust system and a dyno system should go


but i think ive found my solution, VAREX!


found this also:

http://i242.photobucket.com/albums/ff264/viprtwo/newexhaust.jpg

this is toda header uncorked vs. 2.5" exhaust and straight pipe. Same motor, same dyno, same tuner
Blue line is 2.5" exhaust system w/ 2.5" test pipe
Yellow line is open header
Green line is 2.25 exhaust w/ 2.5 Catalytic

Notice how the power is quite even until 7k, then it falls off.

I'll add that I just built my 2.5" exhaust, but I wish I had gone to 3"

[.k.]

its khoi david =), get 3 inch zorst and a varex? =P

[hayashi_1986]

UPDATE! Going for the 2.5" and a nice stealthy oval muffler with a generic looking tip. Nothing fancy, just gonna keep the cops off my arse. Need a new rear bumper as the old cannon has eaten it's way through my one... :( Car is likely going in for a re-spray as well since it's sporting 3 different colours at the moment which are blatantly different lol

From what I'm hearing, the 3" will be louder than a 2.5" by quite a bit. The 2 1/4 I had on the D16 was loud enough to wake up my neighbors (yes it did happen...very upset they were), but that was with a cannon combined with a busted silencer :( . Hopefully this new combo will be quiet...

Not much has changed since I last posted...still working it slowly, really no time to be put in to the car atm with work and all. Time is never easy to come by to do things you really wanna do.

[delsol9000rpms]

shouldnt be too loud just make sure you put a good resonator... and a good muffler they should do their job quite nicely