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Acidcrakker
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2478 posts [100%]
Error Free Since 07/13/08 nj
8-15-2007
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| « Re: H22A 3" Exhaust (prsfan20) | « » 6:15 AM 2/12/2008 |
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It will be fine as long as you tune.
Axid Works Consultant
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kulrevon
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westchester or philly ny
6-25-2003
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| « Re: H22A 3" Exhaust (prsfan20) | « » 9:46 AM 2/12/2008 |
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Most people who have a Normally aspirated H22 go with a 2.5" exhaust. The is no need to go over that.The only people who usually go to 3" are turbocharged to reduce back pressure.
The new whip 3.2 cls 6spd lsd. stock 14.42@96.76mph compltely stock.
| Quote, originally posted by JG Luder » | | For some reason we have reliability fairies in our H22's that come from the factory, and if you crack it apart and take the guts out, the fairy escapes |
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tacticalcustoms
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SLC ut
5-8-2006
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| « Re: H22A 3" Exhaust (kulrevon) | « » 9:48 AM 2/12/2008 |
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3" FTW
99 Prelude h22a4 - I/H/E, Exedy stage 1 clutch/ Fidanza Flywheel - Great DD
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NirVTEC
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3070 posts [98%]
Dunning Square Chicago IL
3-8-2002
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| « Re: H22A 3" Exhaust (tacticalcustoms) | « » 10:28 AM 2/12/2008 |
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The 2.5" on my ~200whp setup netted me 99% efficiency compared to an open header.
This was OPEN@Cat VS Closed-no cat-no res-2.5" Vibrant muffler
| Quote, originally posted by Craig Lowndes » |
Re: RACING---Once you've LOST control, you're just a passenger along for the ride!!!  |
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alterdcreations
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Single camshafting for now in N.Y.
2-10-2006
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| « Re: H22A 3" Exhaust (::NirVTEC::) | « » 10:56 AM 2/12/2008 |
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3" sounds good to me if you are never riding dirty
http://honda-tech.com/zerothread/2246883
RIP Nick Rella 03/02/81 - 01/12/07 Heaven Awaits
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117
HC Slowpoke
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DFW Area TX
12-22-2003
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| « Re: H22A 3" Exhaust (::NirVTEC::) | « » 11:18 AM 2/12/2008 |
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What did you think of the Vibrant muffler? Do you like it? I need to build another exhaust for the track car, and I was thinking of using Vibrant's muffler and ultraquiet resonator.  | Quote, originally posted by ::NirVTEC:: » | The 2.5" on my ~200whp setup netted me 99% efficiency compared to an open header.
This was OPEN@Cat VS Closed-no cat-no res-2.5" Vibrant muffler
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98 Prelude
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NirVTEC
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Dunning Square Chicago IL
3-8-2002
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| « Re: H22A 3" Exhaust (alterdcreations) | « » 11:21 AM 2/12/2008 |
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I may be doing some 3" testing this summer......Trying to get the quietest exhaust that makes the most power. Going to be playing with resonators and different mufflers. I may be going after the HyTech twin loop.| Quote, originally posted by 117 » | | What did you think of the Vibrant muffler? Do you like it? I need to build another exhaust for the track car, and I was thinking of using Vibrant's muffler and ultraquiet resonator. |
With no cat/no res the Vibrant is stupid loud......not sure if you remember it from NPM06. I was almost as loud as you.....
| Quote, originally posted by Craig Lowndes » |
Re: RACING---Once you've LOST control, you're just a passenger along for the ride!!! |
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HIGH POST COUNT=UNSEXED!
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98vtec
Leading the Nation with a Microphone
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Tallahassee Florida
10-22-2002
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| « Re: H22A 3" Exhaust (prsfan20) | « » 12:01 PM 2/12/2008 |
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http://www.honda-tech.com/zerothread/2197695
H23vtec / Rosko Racing / Mykizism FAB - 210whp/175tq
Blakes Wiki| Quote, originally posted by Combustion Contraption » | | i am going to beat you up if i ever meet you |
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117
HC Slowpoke
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DFW Area TX
12-22-2003
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| « Re: H22A 3" Exhaust (::NirVTEC::) | « » 12:04 PM 2/12/2008 |
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Which muffler model? I was hoping the Vibrant would be a bit quieter.  | Quote, originally posted by ::NirVTEC:: » | | I may be doing some 3" testing this summer......Trying to get the quietest exhaust that makes the most power. Going to be playing with resonators and different mufflers. I may be going after the HyTech twin loop. With no cat/no res the Vibrant is stupid loud......not sure if you remember it from NPM06. I was almost as loud as you.....
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98 Prelude
#27 NASA Texas H2/PTB
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NirVTEC
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3070 posts [98%]
Dunning Square Chicago IL
3-8-2002
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| Quote, originally posted by 117 » | | Which muffler model? I was hoping the Vibrant would be a bit quieter. |
The black dual 2.5" one
And there you have it.... 
Although I think a WELL flowing mandrel 2.5" would do about the same as a crappy crush bent 3".
I think alot comes down to $$$ at this point.....3" crush bent is super cheap.
| Quote, originally posted by Craig Lowndes » |
Re: RACING---Once you've LOST control, you're just a passenger along for the ride!!! |
---www.CHICAGOLANDPRELUDECLUB.com---
HIGH POST COUNT=UNSEXED!
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117
HC Slowpoke
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DFW Area TX
12-22-2003
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 Here's to hoping the Vibrant Ultraquiet resonator paired with the 6" round muffler will be quieter than my current setup!
98 Prelude
#27 NASA Texas H2/PTB
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NirVTEC
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3070 posts [98%]
Dunning Square Chicago IL
3-8-2002
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| Quote, originally posted by 117 » | | Here's to hoping the Vibrant Ultraquiet resonator paired with the 6" round muffler will be quieter than my current setup! |
I am going to try some resonators this year....my ears bleed at 7000rpms.
| Quote, originally posted by Craig Lowndes » |
Re: RACING---Once you've LOST control, you're just a passenger along for the ride!!! |
---www.CHICAGOLANDPRELUDECLUB.com---
HIGH POST COUNT=UNSEXED!
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prsfan20
(trial)
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Tehachapi CA
2-12-2008
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| « Re: H22A 3" Exhaust (kulrevon) | « » 4:50 PM 2/12/2008 |
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I forgot to mention that I have Headers, a cat, underdrive pulley, AEM cam gears, a custom twin filter intake(short ram/cold air) and soon Ill be getting a Skunk2 pro series intake manifold and 76mm TB. I'm not sure how much of that would have any effect on my backpressure on not but it might help you to tell me. -Josh
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98vtec
Leading the Nation with a Microphone
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Tallahassee Florida
10-22-2002
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| « Re: H22A 3" Exhaust (prsfan20) | « » 4:52 PM 2/12/2008 |
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you dont want backpressure.
H23vtec / Rosko Racing / Mykizism FAB - 210whp/175tq
Blakes Wiki| Quote, originally posted by Combustion Contraption » | | i am going to beat you up if i ever meet you |
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lude98SH
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Drexel Hill Pa
12-21-2004
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| « Re: H22A 3" Exhaust (98vtec) | « » 7:07 PM 2/12/2008 |
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from what ive read you want or dont want backpressure depending on where in the rpms band you want power. In a drag car however, you do want some backpressure but that amount is accomplished from the header alone. With no backpressure from what I understand during overlap the mixture would pass through the cylinder and decress cylinder fill. Low backpressure helps in high rpm applications. At low rpms you can not create the velocity in the exhaust to help to max scavenging of the cylinders. Therefore when the velocity comes up (high rpms) with a large exhaust velocity will increase but down low velocity will not be very high. This is why you see most drag cars running open exhaust. This is all from memory feel free to correct me or disagree. This is a topic that will be fought about forever.
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prsfan20
(trial)
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Tehachapi CA
2-12-2008
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| « Re: H22A 3" Exhaust (lude98SH) | « » 8:51 PM 2/12/2008 |
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Yeah I do get what you're saying. So pretty much, Drag racing cars do 2.75 or higher and track cars that are NA do 2.75 or lower? I'm going for a Mostly track car but somthing that can still put up a good fight in a drag race WITHOUT going turbo. -Josh
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98vtec
Leading the Nation with a Microphone
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Tallahassee Florida
10-22-2002
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| « Re: H22A 3" Exhaust (prsfan20) | « » 8:54 PM 2/12/2008 |
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heres a small article i did on the topic:http://bbmoto.net/wiki/index.php?ExhaustTheory makes a lot of sense to me. Really the only thing that limits how large of an exhaust you can run is ground clearance. I just dont see how you could get too large of an exhaust after reading a few articles that made me write that up.
H23vtec / Rosko Racing / Mykizism FAB - 210whp/175tq
Blakes Wiki| Quote, originally posted by Combustion Contraption » | | i am going to beat you up if i ever meet you |
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97_type-sh
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14 posts [100%]
Macungie PA
6-11-2007
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| « Re: H22A 3" Exhaust (prsfan20) | « » 9:07 PM 2/12/2008 |
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all ive heard is 3" gets rid of too much backpressure
97' Prelude Type-SH H22a4
Vibrant 4-2-1 Header
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lude98SH
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Drexel Hill Pa
12-21-2004
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| « Re: H22A 3" Exhaust (98vtec) | « » 9:08 PM 2/12/2008 |
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i understand your theory there completely, however doesnt exhaust gas velocity affect cylinder scavenging ? Running a huge exhaust would obviously cause lower velocity at low speeds. This doesnt mean that 3 inch is too large on an h22, there iobviously is sufficent exhaust gas velocity with 3 inch to scavenge properly. However does this mean that if we had a 4 inch on it that it would make more power or the same ? I wouldnt think so what do you think ?
WTB: 5x114.3 wheels with slicks
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For Sale: H22a4 pistons, H22a4 Rods, H22a4 crank
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98vtec
Leading the Nation with a Microphone
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Tallahassee Florida
10-22-2002
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| « Re: H22A 3" Exhaust (lude98SH) | « » 9:46 PM 2/12/2008 |
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i would think that the bigger your make the piping, the closer it gets to making open header power.
H23vtec / Rosko Racing / Mykizism FAB - 210whp/175tq
Blakes Wiki| Quote, originally posted by Combustion Contraption » | | i am going to beat you up if i ever meet you |
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ProjectBB6
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1131 posts [100%]
Cary/Apex NC
11-28-2006
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| « Re: H22A 3" Exhaust (98vtec) | « » 9:54 PM 2/12/2008 |
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| Quote, originally posted by 98vtec » | | i would think that the bigger your make the piping, the closer it gets to making open header power. |
I wish someone would put a 4" exhaust on there n/a to see if that theory holds true. I know for a fact that I am putting a 4" exhaust on my turbo lude this time around.
It took five generations to Perfect one idea...BB6, the last of the PreludesBB6-T
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98vtec
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Tallahassee Florida
10-22-2002
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| « Re: H22A 3" Exhaust (ProjectBB6) | « » 10:03 PM 2/12/2008 |
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i'm going 3" on mine. Mostly because i would prefer the ground clearance than the exhaust get all beat up. Its gonna be a shorty exhaust with a turndown so i would like it to really tuck under the car.cant wait to feel that difference. running 2.25" now 
H23vtec / Rosko Racing / Mykizism FAB - 210whp/175tq
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ProjectBB6
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1131 posts [100%]
Cary/Apex NC
11-28-2006
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| « Re: H22A 3" Exhaust (98vtec) | « » 10:07 PM 2/12/2008 |
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running 2.25 and making the power you do? wow, you should see some nice gains with that 3". I plan to run 3" under the oil pan then flair to 4" because as you said... ground clearance. Show us the graphs when finish the new 3" exhaust
It took five generations to Perfect one idea...BB6, the last of the PreludesBB6-T
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98vtec
Leading the Nation with a Microphone
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Tallahassee Florida
10-22-2002
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| « Re: H22A 3" Exhaust (ProjectBB6) | « » 10:21 PM 2/12/2008 |
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| Quote, originally posted by ProjectBB6 » | | running 2.25 and making the power you do? wow, you should see some nice gains with that 3". |
ha, yea. I'd imagine it will be a pretty significant jump. It'll get dyno'd with the 2.25" exhaust tho (once its F*CKING RUNNING). I dont have the funds to make the exhaust i want yet.
H23vtec / Rosko Racing / Mykizism FAB - 210whp/175tq
Blakes Wiki| Quote, originally posted by Combustion Contraption » | | i am going to beat you up if i ever meet you |
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