Somthing else to stir up the Exhaust topics...
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Somthing else to stir up the Exhaust topics...
"Some basic exhaust pipe diameter guidelines for non-turbo cars are as follows:
1,500cc-2,000cc engines : 2-inch
2,100cc-2,500cc engines : 2.25-inch
2,600cc-3,000cc engines : 2.5-inch "
http://www.magnaflow.com/05new...3.htm
Just had to toss this one in
1,500cc-2,000cc engines : 2-inch
2,100cc-2,500cc engines : 2.25-inch
2,600cc-3,000cc engines : 2.5-inch "
http://www.magnaflow.com/05new...3.htm
Just had to toss this one in
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Re: Somthing else to stir up the Exhaust topics... (Bbasso)
"Some basic exhaust pipe diameter guidelines for non-turbo cars"
what the? does that mean many of the 2.25" and 2.5" exhausts are overkill or better? i say better! 
what the? does that mean many of the 2.25" and 2.5" exhausts are overkill or better?
i say better!
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Re: Somthing else to stir up the Exhaust topics... (Bbasso)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bbasso »</TD></TR><TR><TD CLASS="quote">
1,500cc-2,000cc engines : 2-inch
2,100cc-2,500cc engines : 2.25-inch
2,600cc-3,000cc engines : 2.5-inch"</TD></TR></TABLE>
I found this in another post recently:
"2-1/4" up to 210HP @ the flywheel (about 180-185 whp)
2-3/8" (60mm) up to 235HP @ the flywheel (about 200-207 whp)
2-1/2" up to 265HP @ the flywheel (about 225-235 whp)
2-3/4" up to 325HP @ the flywheel (about 275-285 whp)
3" big for big HP (Forced Induction: > 275 whp) "
Makes it seem like our stock exhaust(cat back) should be one of the last things upgraded.
1,500cc-2,000cc engines : 2-inch
2,100cc-2,500cc engines : 2.25-inch
2,600cc-3,000cc engines : 2.5-inch"</TD></TR></TABLE>
I found this in another post recently:
"2-1/4" up to 210HP @ the flywheel (about 180-185 whp)
2-3/8" (60mm) up to 235HP @ the flywheel (about 200-207 whp)
2-1/2" up to 265HP @ the flywheel (about 225-235 whp)
2-3/4" up to 325HP @ the flywheel (about 275-285 whp)
3" big for big HP (Forced Induction: > 275 whp) "
Makes it seem like our stock exhaust(cat back) should be one of the last things upgraded.
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From: Chicago, IL, United States
Re: Somthing else to stir up the Exhaust topics... (jond)
2-1/4" up to 210HP @ the flywheel (about 180-185 whp)
2-3/8" (60mm) up to 235HP @ the flywheel (about 200-207 whp)
2-1/2" up to 265HP @ the flywheel (about 225-235 whp)
2-3/4" up to 325HP @ the flywheel (about 275-285 whp)
3" big for big HP (Forced Induction: > 275 whp)
These specs were provided by Dave @ SMS Products.
2-3/8" (60mm) up to 235HP @ the flywheel (about 200-207 whp)
2-1/2" up to 265HP @ the flywheel (about 225-235 whp)
2-3/4" up to 325HP @ the flywheel (about 275-285 whp)
3" big for big HP (Forced Induction: > 275 whp)
These specs were provided by Dave @ SMS Products.
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From: Chicago, IL, United States
Re: Somthing else to stir up the Exhaust topics... (ASR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ASR »</TD></TR><TR><TD CLASS="quote">Some are overkill, NA cars need some back pressure.</TD></TR></TABLE>
NO NO NO!
Back pressure is NEVER a good thing. That is an old myth.
NO NO NO!
Back pressure is NEVER a good thing. That is an old myth.
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Re: Somthing else to stir up the Exhaust topics... (TheGSRGuy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheGSRGuy »</TD></TR><TR><TD CLASS="quote">
NO NO NO!
Back pressure is NEVER a good thing. That is an old myth.</TD></TR></TABLE>
i hear a debate coming
NO NO NO!
Back pressure is NEVER a good thing. That is an old myth.</TD></TR></TABLE>
i hear a debate coming
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Re: Somthing else to stir up the Exhaust topics... (swtxaznrac3r)
2.5" IMO is overkill. Someone pushed this size on H-T a long time ago and half the board is now repeating it as the Gospel Truth, kinda funny. Also humorous that no one who talks about 2.5" OD has anything firm to back up their claim with. That's a LARGE exhaust.... especially for cars with less than 200whp and only 1800-2000cc's.
I gained a good bit of power with my Fujitsubo, which is 63mm OD. Mugen is 60.5mm. I don't see Esteban or anyone else with those two exhausts complaining about their exhausts restricting them...
I just want to remind people not to spout off about what is and what is not important unless you REALLY know what you are talking about. I dont know enough about exhaust velocity, backpressure, etc, so I won't comment.
Modified by Chris N at 2:36 PM 3/8/2004
I gained a good bit of power with my Fujitsubo, which is 63mm OD. Mugen is 60.5mm. I don't see Esteban or anyone else with those two exhausts complaining about their exhausts restricting them...
I just want to remind people not to spout off about what is and what is not important unless you REALLY know what you are talking about. I dont know enough about exhaust velocity, backpressure, etc, so I won't comment.
Modified by Chris N at 2:36 PM 3/8/2004
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From: kuidaore
Re: Somthing else to stir up the Exhaust topics... (Chris N)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris N »</TD></TR><TR><TD CLASS="quote">2.5" IMO is overkill. Someone pushed this size on H-T a long time ago and half the board is now repeating it as the Gospel Truth, kinda funny. Also humorous that no one who talks about 2.5" ID has anything firm to back up their claim with. That's a LARGE exhaust.... especially for cars with less than 200whp and only 1800-2000cc's.
I gained a good bit of power with my Fujitsubo, which is 63mm ID. Mugen is 60.5mm. I don't see Esteban or anyone else with those two exhausts complaining about their exhausts restricting them...
I just want to remind people not to spout off about what is and what is not important unless you REALLY know what you are talking about. I dont know enough about exhaust velocity, backpressure, etc, so I won't comment.</TD></TR></TABLE>
OD, Chris, not ID.
From all those discussions in the past I remember that all of the exhaust pipe diameters are measured in OD unless otherwise specified, so you need to back out the sidewall thickness to come to the proper ID.
I gained a good bit of power with my Fujitsubo, which is 63mm ID. Mugen is 60.5mm. I don't see Esteban or anyone else with those two exhausts complaining about their exhausts restricting them...
I just want to remind people not to spout off about what is and what is not important unless you REALLY know what you are talking about. I dont know enough about exhaust velocity, backpressure, etc, so I won't comment.</TD></TR></TABLE>
OD, Chris, not ID.
From all those discussions in the past I remember that all of the exhaust pipe diameters are measured in OD unless otherwise specified, so you need to back out the sidewall thickness to come to the proper ID.
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Re: Somthing else to stir up the Exhaust topics... (1GreyTeg)
There's something to be said about exhaust velocity at 9,000rpm, a 1.8L engine moves the same about of air at 9,000rpm as a 3.6L engine does at 4,500rpm...
Do your own research and find out what works best for you.
Austin
Do your own research and find out what works best for you.
Austin
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From: kuidaore
Re: Somthing else to stir up the Exhaust topics... (Austin)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Austin »</TD></TR><TR><TD CLASS="quote">There's something to be said about exhaust velocity at 9,000rpm, a 1.8L engine moves the same about of air at 9,000rpm as a 3.6L engine does at 4,500rpm...
Do your own research and find out what works best for you.
Austin</TD></TR></TABLE>
It's also funny that both John at Hytech and Dave from SMSP built and promoted 2 1/2" OD catbacks for the ITR.
Do your own research and find out what works best for you.
Austin</TD></TR></TABLE>
It's also funny that both John at Hytech and Dave from SMSP built and promoted 2 1/2" OD catbacks for the ITR.
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Re: Somthing else to stir up the Exhaust topics... (1GreyTeg)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1GreyTeg »</TD></TR><TR><TD CLASS="quote">
OD, Chris, not ID.
From all those discussions in the past I remember that all of the exhaust pipe diameters are measured in OD unless otherwise specified, so you need to back out the sidewall thickness to come to the proper ID.</TD></TR></TABLE>
I'll correct my post. I got mixed up.
OD, Chris, not ID.
From all those discussions in the past I remember that all of the exhaust pipe diameters are measured in OD unless otherwise specified, so you need to back out the sidewall thickness to come to the proper ID.</TD></TR></TABLE>
I'll correct my post. I got mixed up.
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From: kuidaore
Re: Somthing else to stir up the Exhaust topics... (Chris N)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris N »</TD></TR><TR><TD CLASS="quote">
I'll correct my post. I got mixed up.</TD></TR></TABLE>
No prob, we still love you.
I'll correct my post. I got mixed up.
</TD></TR></TABLE>No prob, we still love you.
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Re: Somthing else to stir up the Exhaust topics... (Austin)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Austin »</TD></TR><TR><TD CLASS="quote">There's something to be said about exhaust velocity at 9,000rpm, a 1.8L engine moves the same about of air at 9,000rpm as a 3.6L engine does at 4,500rpm...</TD></TR></TABLE>
Thats a good point. Does x amount of hp put out the same amount of air regardless of how the hp is made?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">It's also funny that both John at Hytech and Dave from SMSP built and promoted 2 1/2" OD catbacks for the ITR.</TD></TR></TABLE>
That could be more marketing than performance, I dont know. Would you spend $1000 on a .125'' bigger exhaust?
Thats a good point. Does x amount of hp put out the same amount of air regardless of how the hp is made?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">It's also funny that both John at Hytech and Dave from SMSP built and promoted 2 1/2" OD catbacks for the ITR.</TD></TR></TABLE>
That could be more marketing than performance, I dont know. Would you spend $1000 on a .125'' bigger exhaust?
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Re: Somthing else to stir up the Exhaust topics... (1GreyTeg)
I'm glad that someone posted whp/bhp numbers as well as engine displacements, because we all know that the B18C5 is no ordinary 1.8 L motor!
Being on the cheap side lately I'm having Dave re-do an old DC 4-1 header of mine with a 2 1/2" collector, test pipe w/O2 bung and a Magnaflow 2 1/4" cat back.
We'll also be doing some stock dynos and see how it compares as the mods continue. Probably do some Hondata vs. Mugen ECU comparisons as well.
Hmmm ... all in time for the expo?
Being on the cheap side lately I'm having Dave re-do an old DC 4-1 header of mine with a 2 1/2" collector, test pipe w/O2 bung and a Magnaflow 2 1/4" cat back.
We'll also be doing some stock dynos and see how it compares as the mods continue. Probably do some Hondata vs. Mugen ECU comparisons as well.
Hmmm ... all in time for the expo?
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From: kuidaore
Re: Somthing else to stir up the Exhaust topics... (zygspeed)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zygspeed »</TD></TR><TR><TD CLASS="quote">I'm glad that someone posted whp/bhp numbers as well as engine displacements, because we all know that the B18C5 is no ordinary 1.8 L motor!
Being on the cheap side lately I'm having Dave re-do an old DC 4-1 header of mine with a 2 1/2" collector, test pipe w/O2 bung and a Magnaflow 2 1/4" cat back.
We'll also be doing some stock dynos and see how it compares as the mods continue. Probably do some Hondata vs. Mugen ECU comparisons as well.
Hmmm ... all in time for the expo? </TD></TR></TABLE>
"Stockish" huh.
Ok, then I gotta get my 150 shot of NaWz, to take you guys in the turns.
Being on the cheap side lately I'm having Dave re-do an old DC 4-1 header of mine with a 2 1/2" collector, test pipe w/O2 bung and a Magnaflow 2 1/4" cat back.
We'll also be doing some stock dynos and see how it compares as the mods continue. Probably do some Hondata vs. Mugen ECU comparisons as well.
Hmmm ... all in time for the expo?
</TD></TR></TABLE>"Stockish" huh.
Ok, then I gotta get my 150 shot of NaWz, to take you guys in the turns.
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Re: Somthing else to stir up the Exhaust topics... (1GreyTeg)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1GreyTeg »</TD></TR><TR><TD CLASS="quote">"Stockish" huh.</TD></TR></TABLE>
Ummm ... yes sir! Stock (for me) = no boost!
But I need to make sure I fit in with the advanced group if so assigned.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1GreyTeg »</TD></TR><TR><TD CLASS="quote">Ok, then I gotta get my 150 shot of NaWz, to take you guys in the turns.</TD></TR></TABLE>
LOL! I wanna see you hit the NAWZ in the turns!
Ed -- who needs to make a stock 72K mile ITR track worthy (competitive) in the next couple months.
Ummm ... yes sir! Stock (for me) = no boost!
But I need to make sure I fit in with the advanced group if so assigned.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1GreyTeg »</TD></TR><TR><TD CLASS="quote">Ok, then I gotta get my 150 shot of NaWz, to take you guys in the turns.</TD></TR></TABLE>
LOL! I wanna see you hit the NAWZ in the turns!
Ed -- who needs to make a stock 72K mile ITR track worthy (competitive) in the next couple months.
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From: PA
Re: Somthing else to stir up the Exhaust topics... (swtxaznrac3r)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by swtxaznrac3r »</TD></TR><TR><TD CLASS="quote">
i hear a debate coming</TD></TR></TABLE>
No debate...what gsrguy said is correct...it's a fact...what's there to debate? You can't debate facts...
i hear a debate coming</TD></TR></TABLE>
No debate...what gsrguy said is correct...it's a fact...what's there to debate? You can't debate facts...
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From: Hollywood Babylon
Ordering my 2.5inch piping this week. Im gonna go with 1 resonator of the same size piping, and a magnaflow muffler that Dave uses for his SMSP set ups and pray its not too loud. We'll see how it does.
whats would you suggest for the "bends" of the exhaust? should I use "elbows" or smoother "U-bends"? Im guessing U bends.
whats would you suggest for the "bends" of the exhaust? should I use "elbows" or smoother "U-bends"? Im guessing U bends.
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