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What size exhaust for this 200 whp build?

 
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Old 03-30-2009, 06:49 PM
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Icon2 What size exhaust for this 200 whp build?

Hey guys, I just got my 1997 base almost two months ago, already have done a few super basic mods, painted gauge bezels and fuel pump kill switch. Over the summer I hope to build up my performace, hopfully close to 200 whp. With all of the bolt ons and no cam work, what size exhaust piping would provide the best performace and sound? Should I use 2.5" or just stay stock size? If I go 2.5", then I'll go custom, otherwise I'll probably get the tanabe super medallion hyper exhaust. LOL I typed all this out on a iPhone so bear with me.
Thanks
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Old 03-30-2009, 07:01 PM
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Re: What size exhaust for this 200 whp build?

is that your lude?!?!?!!?!?!? i always see that on google images when i type in prelude, if your the owner..im not a fan of body kits but to keep that ****t clean as hell props to you man
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Old 03-30-2009, 08:41 PM
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Re: What size exhaust for this 200 whp build?

You won't have 200 whp with bolt ons.

Regardless, 3" exhaust on H22 is the way to go.
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Old 03-30-2009, 09:38 PM
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Re: What size exhaust for this 200 whp build?

3" eh? lol



I have 2.5.................
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Old 03-31-2009, 12:09 AM
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Icon2 Re: What size exhaust for this 200 whp build?

Umm...well the performance mods i was going to do are:

AEM V2 intake w/cold-air box mod
AEM Tue-Power Pullies
AEM Fuel Rail
Accord Euro-R Intake Manifold
S2000k Throttle Body
SMSP Header
Light weight Clutch and Flywheel (not sure what to get)
Magnaflow High-Flow Cat
Tanabe Cat-Back Exhaust
APEXI VAFC
Dyno-Tuned

Oh and by the way, the picture in my avatar isn't my car, just my dream car I can show you pics of mine if you want...
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Old 03-31-2009, 12:30 AM
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Re: What size exhaust for this 200 whp build?

The VAFC won't do it. Go with the Hondata S300 much more bang for the buck. I think your goal is achievable if u do everything right and do a lot of hoping and/or praying.
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Old 03-31-2009, 12:30 AM
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Re: What size exhaust for this 200 whp build?

throw up some pics, and if you want your car like that...its an r34 kit with oem cf hood and lambo doors. lol
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Old 03-31-2009, 12:43 AM
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Icon2 Re: What size exhaust for this 200 whp build?

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The VAFC won't do it. Go with the Hondata S300 much more bang for the buck. I think your goal is achievable if u do everything right and do a lot of hoping and/or praying.
Hmm, I don't know much about tuning with that program, does Hondata S300 work with OBD II? I thought only VAFC works without any ECU tampering.
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Old 03-31-2009, 01:03 AM
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Re: What size exhaust for this 200 whp build?

You'll be fine with a VAFC, its a good alternative to a standalone, which cost much more than any piggyback.
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Old 03-31-2009, 01:45 AM
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Re: What size exhaust for this 200 whp build?

Iguess only time will tell...
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Old 03-31-2009, 01:52 AM
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Icon2 Re: What size exhaust for this 200 whp build?

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Originally Posted by ImPorTuNeRdJ View Post
throw up some pics, and if you want your car like that...its an r34 kit with oem cf hood and lambo doors. lol
OK here are the some pictures of my car, lol i am the third owner and the previous one absoultally trashed it








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Old 03-31-2009, 02:30 AM
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Re: What size exhaust for this 200 whp build?

seems to me like u already chose the tanabe medallion,,, at least thats what i would go with .... sounds ooo so good

its pricy but i think well worth it
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Old 03-31-2009, 02:54 AM
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Re: What size exhaust for this 200 whp build?

Well it would be easier to go with the Tanabe Suber Medallion Hyper, than to take it to a shop and put together a custom exhaust, just one thing though...you can't make much power with only 2.25" And in the future i might use Type-S cams and Pistons @11.1 comp. I may need bigger piping, but than again i don't know anything lol i am a newb!
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Old 03-31-2009, 04:47 AM
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Re: What size exhaust for this 200 whp build?

the previous owner trashed it? whats so trashed about your lude, it actually looks like its in really good condition..
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Old 03-31-2009, 06:56 AM
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Re: What size exhaust for this 200 whp build?

3" would be the most ideal whether turbo or na. you want exhaust gas to escape as quickly as possible so the less restriction the better. i had the tanabe hyper medallion and it was a pretty good exhaust... very loud.
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Old 03-31-2009, 09:21 AM
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Re: What size exhaust for this 200 whp build?

Isn't velocity more the key than volume on an exhaust system? I'm still running stock exhaust and am really toying around with something new. Unless you have bookoo power isn't 3" going to be too big get the right flow at low rpm? Also, do you have t step up the header to larger primaries?
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Old 03-31-2009, 09:24 AM
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Re: What size exhaust for this 200 whp build?

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3" would be the most ideal whether turbo or na. you want exhaust gas to escape as quickly as possible so the less restriction the better. i had the tanabe hyper medallion and it was a pretty good exhaust... very loud.
HE knows what he's talking about
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Old 03-31-2009, 10:39 AM
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Re: What size exhaust for this 200 whp build?

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Hmm, I don't know much about tuning with that program, does Hondata S300 work with OBD II? I thought only VAFC works without any ECU tampering.

the problem with tuning an OBDII car is that the ecu eventually relearns its self and then it'll convert back to the stock tune. so after you spend all that $$$ on parts that you think will give alotta power (maybe 15-20hp'ish total), once the ecu goes back to stock, it'll feel like you did nothing what-so-ever.

which is why you need to convert it to OBDI. but being that you live in cali, your pretty much eff'd haha.
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Old 03-31-2009, 11:23 AM
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Re: What size exhaust for this 200 whp build?

Fk yeah man!! Nice lude, its verrrry clean. IMO a 2.5" exhaust will be best if you're going to stop at 200 whp or anything near that level. If you've done any fluids analysis courses you'll find that if your piping is too big, then you'll lose velocity in the long run with less pressure (exhaust ---> directly correlated with hp) coming from the engine. We're not talking huge amounts, but with a 2.5" exhaust versus a 3" the 2.5" will allow the exhaust gasses to scavenge much more efficiently.

Cliff notes:
2.5"

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Old 03-31-2009, 11:25 AM
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Re: What size exhaust for this 200 whp build?

Now are these settings in the non volatile memory of the ecu or if power is disconnected will they continue to work as the piggyback is telling it to?
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Old 03-31-2009, 11:31 AM
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Re: What size exhaust for this 200 whp build?

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Originally Posted by Stallion View Post
Umm...well the performance mods i was going to do are:

AEM V2 intake w/cold-air box mod
AEM Tue-Power Pullies
AEM Fuel Rail
Accord Euro-R Intake Manifold
S2000k Throttle Body
SMSP Header
Light weight Clutch and Flywheel (not sure what to get)
Magnaflow High-Flow Cat
Tanabe Cat-Back Exhaust
APEXI VAFC
Dyno-Tuned

Oh and by the way, the picture in my avatar isn't my car, just my dream car I can show you pics of mine if you want...
Get a true CAI
The pulleys don't really do anything. You're better off pulling the power steering all together or leave the stock pulleys.
Stock fuel rail is more than enough.
Why S2K TB?
Nice header.
You'll need an OBD1 conversion and a real tune. VAFC isn't really good for anything beyond i/h/e which won't get you 200 whp.
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Old 03-31-2009, 12:09 PM
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Re: What size exhaust for this 200 whp build?

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Get a true CAI
The pulleys don't really do anything. You're better off pulling the power steering all together or leave the stock pulleys.
Stock fuel rail is more than enough.
Why S2K TB?
Nice header.
You'll need an OBD1 conversion and a real tune. VAFC isn't really good for anything beyond i/h/e which won't get you 200 whp.
and if he is gonna pull the p/s might as well take out the ac too.
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Old 03-31-2009, 12:59 PM
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Re: What size exhaust for this 200 whp build?

Lol it doesn't look trashed anymore because I spent 3 days cleaning it out, gutted everything. I even have before pictures lol. Anyways it sounds like a 2.5" piping is the best for my needs, I like loud, but the cops will not. I thought that the s2k tb is 68mm and will bolt up to the euro r intake mani. Doesn't a obd1 conversion reduce reliability? Because this will be my daily driver. Thanks for everybodys input
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Old 03-31-2009, 01:42 PM
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Re: What size exhaust for this 200 whp build?

reduce reliability? where'd you hear that from? no is the answer.

but since your in cali, to get it inspected, pretty sure your gonna hafta put the OBD2 ecu back in and prolly all the stock parts back on in order to pass. which = way more work than its worth.

maybe someone else from cali can verify this.
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Old 03-31-2009, 02:37 PM
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Re: What size exhaust for this 200 whp build?

size isnt gonna make that much of a difference on the muffler of a catback, and the 5th gen pushes close to 200hp to the crank anyway, a few simple bolt ons should put u over a little higher, for example Intake, headers, full exhaust, u might get 10-15 extra ponies max. if you start messing with air and fuel by doing intake manifold, your car will either be running to lean or too rich and i wouldnt mess with that stuff unless u know what your doing.
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Old 03-31-2009, 02:39 PM
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Re: What size exhaust for this 200 whp build?

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and if he is gonna pull the p/s might as well take out the ac too.
I kept my A/C.

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Lol it doesn't look trashed anymore because I spent 3 days cleaning it out, gutted everything. I even have before pictures lol. Anyways it sounds like a 2.5" piping is the best for my needs, I like loud, but the cops will not. I thought that the s2k tb is 68mm and will bolt up to the euro r intake mani. Doesn't a obd1 conversion reduce reliability? Because this will be my daily driver. Thanks for everybodys input
Do your research on the exhaust. Just cause everyone has 2.5" doesn't mean it's the most efficient.
S2000 TB is 62mm.
OBD1 is not less reliable.
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Old 03-31-2009, 03:09 PM
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Re: What size exhaust for this 200 whp build?

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I kept my A/C.
theres a little switch on your door called the power window switch to replace that.
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Old 03-31-2009, 03:18 PM
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Re: What size exhaust for this 200 whp build?

Yeah but when it rains in the summer, I don't like taking showers while I drive.
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Old 03-31-2009, 05:19 PM
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Re: What size exhaust for this 200 whp build?

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Originally Posted by orbslude View Post
size isnt gonna make that much of a difference on the muffler of a catback, and the 5th gen pushes close to 200hp to the crank anyway, a few simple bolt ons should put u over a little higher...
But as you stated, that's at the crank. Through the gears in the transaxle you lose roughly 30-40%, so if he wants 200hp at the wheels, then he probably needs to add a lot more. Stock fifth gen dynos at 130-150 whp (depending on dyno, weather conditions, condition of vehicle, etc) so he'll need a lot more than the bolt ons you describe, which experiance tells me will get him to about 160-180whp (again, depending on dyno, weather, etc). I've never seen (note: that doesn't mean it hasn't happened) bolt-ons make more than that.
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Old 03-31-2009, 07:43 PM
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Icon2 Re: What size exhaust for this 200 whp build?

Ok, so your telling me that a OBDI conversion (p72) will not hurt my engine or its reliability even if it was designed w/ OBDII? About the throttle body, which works best with the Euro-R manifold? I want to get the AEM V2 because it has a nice sound lol, but from what i've read, the AEM V2 intake w/ coldair box mod performs nicely, the best of both worlds (CAI and SRI). And finally back to the exhaust, like i stated before, i love them loud (but not ricy) so that isn't an issue with me. If i went custom, would 2.5" piping from a 2.5" magnaflow high-flow cat, into a 18"-22" resonator to a nice muffler of some sort (not sure yet) be better than the Tanabe Super Medallion Hyper cat-back set-up?
Thanks you guys are the best
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