Will the OEM ITR muffler flow well enough?
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From: DFW, TX
Will the OEM ITR muffler flow well enough?
Sup guys. I just got my OEM JDM 4-1 header in and I have a question regarding the stock muffler. My current mods would be AEM CAI, JDM 4-1 header. I want to upgrade the exhaust at the same time and plan on going with:
1) Aftermarket cat or T1R resonated test pipe
2) Resonator
3) Mandrel bent 2.5" piping
4) Stock muffler for the OEM look.
Will the OEM muffler flow well enough say compared to an aftermarket muffler like a ES Tuning, Magnaflow, or any others? Maybe some of our resident exhaust experts can chime in. The car is mainly a daily driver but I plan on getting into Auto-X soon time and college permitting. TIA for the help.
1) Aftermarket cat or T1R resonated test pipe
2) Resonator
3) Mandrel bent 2.5" piping
4) Stock muffler for the OEM look.
Will the OEM muffler flow well enough say compared to an aftermarket muffler like a ES Tuning, Magnaflow, or any others? Maybe some of our resident exhaust experts can chime in. The car is mainly a daily driver but I plan on getting into Auto-X soon time and college permitting. TIA for the help.
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From: Fairbanks
Re: Will the OEM ITR muffler flow well enough? (hungsteR)
With only JDM 4-1 as your mods, stock muffler is good enough.
If you want cheap solution, contact SMSP and get the "bottleneck eliminator" for $25 and add it on to your b-pipe for a bit better flow.
If you want cheap solution, contact SMSP and get the "bottleneck eliminator" for $25 and add it on to your b-pipe for a bit better flow.
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From: DFW, TX
Re: Will the OEM ITR muffler flow well enough? (Cosworth)
Cosworth, I plan on going with 2.5 mandrel bent piping instead of the stock piping so stock bottle neck won't be there.
A cam upgrade/head package (JUN III or Skunk2 Stage III) as will be in the future plans so will the stock muffler still be sufficient? Or should I upgrade the muffler as well?
A cam upgrade/head package (JUN III or Skunk2 Stage III) as will be in the future plans so will the stock muffler still be sufficient? Or should I upgrade the muffler as well?
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From: Fairbanks
Re: Will the OEM ITR muffler flow well enough? (hungsteR)
Oh, I get your question now. You're just asking about the muffler and not the whole cat-back sysmte. 
on me.
If I were you, I'd just upgrade the whole cat-back to 2.5" mandrel bent piping & muffler when you get JUNIII or Stage III. I'd leave the system stock for now...
on me. If I were you, I'd just upgrade the whole cat-back to 2.5" mandrel bent piping & muffler when you get JUNIII or Stage III. I'd leave the system stock for now...
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From: Toronto, ON, CANADA
Re: Will the OEM ITR muffler flow well enough? (Cosworth)
With only JDM 4-1 as your mods, stock muffler is good enough.
If you want cheap solution, contact SMSP and get the "bottleneck eliminator" for $25 and add it on to your b-pipe for a bit better flow.
If you want cheap solution, contact SMSP and get the "bottleneck eliminator" for $25 and add it on to your b-pipe for a bit better flow.
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From: Fairbanks
Re: Will the OEM ITR muffler flow well enough? (sil)
hrm.. this wasn't the number he gave me for the bottleneck eliminator.. which i'm assuming it the cat end of the bpipe?
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From: kuidaore
Re: Will the OEM ITR muffler flow well enough? (hungsteR)
As the others said, your mods don't require the bigger diameter piping yet. And remember, if you go with 2 1/2" piping to the stock muffler, then you are actually creating a new bottleneck since the muffler pipe inlet diameter is 2 1/4" Not 2 1/2".
Trust me and anyonw else who reports that the Stock ITR catback is a Very well designed setup with less connecting flanges than an aftermarket setup and mandrel bent SS piping. It just has several bottlenecks. 1 where the B pipe connects to the cat, and 2 more before and after the 2nd mini resonator before the axleback section.
If you aren't doing hot cams yet you really don't need a larger diameter piped catback.
Of course Dave SMSP can solve your problems with the stock piping bottlenecks. But, I believe that he would instead suggest going with his full catback and his muffler with the Stock OEM tip instead of keeping the WHOLE OEM muffler mated to larger diameter pipe.
A.
Trust me and anyonw else who reports that the Stock ITR catback is a Very well designed setup with less connecting flanges than an aftermarket setup and mandrel bent SS piping. It just has several bottlenecks. 1 where the B pipe connects to the cat, and 2 more before and after the 2nd mini resonator before the axleback section.
If you aren't doing hot cams yet you really don't need a larger diameter piped catback.
Of course Dave SMSP can solve your problems with the stock piping bottlenecks. But, I believe that he would instead suggest going with his full catback and his muffler with the Stock OEM tip instead of keeping the WHOLE OEM muffler mated to larger diameter pipe.
A.
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From: CA, usa
Re: Will the OEM ITR muffler flow well enough? (1GreyTeg)
Everybody is saying you don't NEED aftermarket [edit EXHAUST edit], BUT an aftermarket exhaust WILL net your more horsepower. If you buy it now or later, you'll still end up spending money on exhaust.
[Modified by disordeR, 11:05 AM 2/10/2003]
[Modified by disordeR, 11:05 AM 2/10/2003]
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From: Fairbanks
Re: Will the OEM ITR muffler flow well enough? (disordeR)
If it's any help, when we dyno-ed Ken's (BlackR) Toda B setup (semi-tuned) w/ open header vs. stock exhaust, we were only able to gain maybe 1-2 whp w/ the open header setup.
Stock exhaust flows pretty good for a stock unit.
Stock exhaust flows pretty good for a stock unit.
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From: kuidaore
Re: Will the OEM ITR muffler flow well enough? (disordeR)
Everybody is saying you don't NEED aftermarket cams, BUT an aftermarket exhaust WILL net your more horsepower. If you buy it now or later, you'll still end up spending money on exhaust.
You didn't make sense there.
You don't NEED either really, it's desire that fuels most that mod.
Everybody is saying you don't NEED aftermarket cams, BUT an aftermarket exhaust WILL net your more horsepower.
Uhh No.
Good hot cams will provide more power than a good catback. You will need a better exhaust down the road after you do the cams True.
And the point should be that researching NOW and possibly buying a good catback NOW will be just as good as later if he is already set on cams, since he will need a better exhaust eventually if he goes deeper into the NA route.
But, he NEVER mentioned cams.
The point is that the Stock exhaust is more than "just good enough" for what he posted as plans. And that adding the piping he mentioned is not really worth it if he mates it all back up to the Stock Muffler.
My answer is still Keep the stock catback muffler and all.
A.
Member
Joined: Jul 2001
Posts: 2,809
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From: CA, usa
Re: Will the OEM ITR muffler flow well enough? (1GreyTeg)
Everybody is saying you don't NEED aftermarket cams, BUT an aftermarket exhaust WILL net your more horsepower. If you buy it now or later, you'll still end up spending money on exhaust.
Huh?
You didn't make sense there.
You don't NEED either really, it's desire that fuels most that mod.
Everybody is saying you don't NEED aftermarket cams, BUT an aftermarket exhaust WILL net your more horsepower.
Huh?
Uhh No.
Good hot cams will provide more power than a good catback. You will need a better exhaust down the road after you do the cams True.
And the point should be that researching NOW and possibly buying a good catback NOW will be just as good as later if he is already set on cams, since he will need a better exhaust eventually if he goes deeper into the NA route.
But, he NEVER mentioned cams.
The point is that the Stock exhaust is more than "just good enough" for what he posted as plans. And that adding the piping he mentioned is not really worth it if he mates it all back up to the Stock Muffler.
My answer is still Keep the stock catback muffler and all.
A.
Huh?
You didn't make sense there.
You don't NEED either really, it's desire that fuels most that mod.
Everybody is saying you don't NEED aftermarket cams, BUT an aftermarket exhaust WILL net your more horsepower.
Huh?
Uhh No.
Good hot cams will provide more power than a good catback. You will need a better exhaust down the road after you do the cams True.
And the point should be that researching NOW and possibly buying a good catback NOW will be just as good as later if he is already set on cams, since he will need a better exhaust eventually if he goes deeper into the NA route.
But, he NEVER mentioned cams.
The point is that the Stock exhaust is more than "just good enough" for what he posted as plans. And that adding the piping he mentioned is not really worth it if he mates it all back up to the Stock Muffler.
My answer is still Keep the stock catback muffler and all.
A.
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