2.25 or 2.5 exhaust?
03-13-2011, 03:10 AM
#121
But as far as losing power goes, won't know till I take it to the track.
03-13-2011, 09:55 AM
#122
You ever thought about building it using a manufactured merger like the following:
1. http://www.magnaflow.com/02product/s...e=main&id=9539
2.http://www.flowmastermufflers.com/sh...ndex&cPath=228
3. http://www.mandrelbendingsolutions.c...pes/Categories
IMO it would be a better merge in an efficient/power point of view.... As for coming off the header collectors I would have the existing collector, welded a 45* or 90* bends then added a 3-bolt flange facing rwd making it easy and cleaner....to merge them into the ypipe merge...there seems to be plenty of room so they don't have to be siamesed or that close to each other...
1. http://www.magnaflow.com/02product/s...e=main&id=9539
2.http://www.flowmastermufflers.com/sh...ndex&cPath=228
3. http://www.mandrelbendingsolutions.c...pes/Categories
IMO it would be a better merge in an efficient/power point of view.... As for coming off the header collectors I would have the existing collector, welded a 45* or 90* bends then added a 3-bolt flange facing rwd making it easy and cleaner....to merge them into the ypipe merge...there seems to be plenty of room so they don't have to be siamesed or that close to each other...
03-13-2011, 07:54 PM
#123
Senior Member
Join Date: Jan 2006
Location: Fuk 301 it's 410 Bal Md black/purple.
Posts: 1,860
ok, Is there a myth or a truth about the 3" exhaust being better than the 2.25/2.50 exhaust on a N/A car 3.0L . I am truly in for a whole H/E upgrade, I want to know If the 3" exhaust will be still a good on the low end as it would be good for high end with boost/mods/N/A. I want to get the best for the N/A motor and I am hoping that the 3" will do the trick. I am trying to figure this out here but the thread and the peoples different opinon making it a hard disicion thanks.
03-13-2011, 09:47 PM
#125
ok, Is there a myth or a truth about the 3" exhaust being better than the 2.25/2.50 exhaust on a N/A car 3.0L . I am truly in for a whole H/E upgrade, I want to know If the 3" exhaust will be still a good on the low end as it would be good for high end with boost/mods/N/A. I want to get the best for the N/A motor and I am hoping that the 3" will do the trick. I am trying to figure this out here but the thread and the peoples different opinon making it a hard disicion thanks.
It's all myth. There are NO conclusive dynos or FACTS to say 3" > 2.5" > Stock.
With that said, see the dyno # in my sig? That was done w/ a 3" catback, do your own maxima dyno research and find any VQ30 dyno with more tq before 3k with just bolt ons untuned.
One more thing, when reading/listening to these post, take in account to who actually owns a 3" and who doesn't. It will go like this... People who do not have a 3" says that you will lose low end, people who OWN a 3" catback will say that you gain low end, now who's opinion will you take on a 3" catback?
03-13-2011, 09:59 PM
#127
You ever thought about building it using a manufactured merger like the following:
1. http://www.magnaflow.com/02product/s...e=main&id=9539
2.http://www.flowmastermufflers.com/sh...ndex&cPath=228
3. http://www.mandrelbendingsolutions.c...pes/Categories
IMO it would be a better merge in an efficient/power point of view.... As for coming off the header collectors I would have the existing collector, welded a 45* or 90* bends then added a 3-bolt flange facing rwd making it easy and cleaner....to merge them into the ypipe merge...there seems to be plenty of room so they don't have to be siamesed or that close to each other...
1. http://www.magnaflow.com/02product/s...e=main&id=9539
2.http://www.flowmastermufflers.com/sh...ndex&cPath=228
3. http://www.mandrelbendingsolutions.c...pes/Categories
IMO it would be a better merge in an efficient/power point of view.... As for coming off the header collectors I would have the existing collector, welded a 45* or 90* bends then added a 3-bolt flange facing rwd making it easy and cleaner....to merge them into the ypipe merge...there seems to be plenty of room so they don't have to be siamesed or that close to each other...
03-14-2011, 08:51 AM
#128
Senior Member
Join Date: Sep 2009
Location: Worcester, MA
Posts: 4,011
I have a 3" on my 2003 and It's not quite as linear response wise as the OEM system with throttle inputs in the first 1/4"-1/2" of accelerator pedal movement...but for damn sure 1/2" to WOT is A KILLER!!!!! The low range rpm is no slouch.....but 3K on up is like an orgasmic event....I can usually leave a stop sign like an old lady and roll into the throttle (that's not flooring it either!!!) and break the tires loose just before the 1-2 gear change with an A/T.... It never did that before with the 2.5" Cattman and definitely not with the 2" OEM (Choker)!!!!
It goes like this.
It's all myth. There are NO conclusive dynos or FACTS to say 3" > 2.5" > Stock.
With that said, see the dyno # in my sig? That was done w/ a 3" catback, do your own maxima dyno research and find any VQ30 dyno with more tq before 3k with just bolt ons untuned.
One more thing, when reading/listening to these post, take in account to who actually owns a 3" and who doesn't. It will go like this... People who do not have a 3" says that you will lose low end, people who OWN a 3" catback will say that you gain low end, now who's opinion will you take on a 3" catback?
It's all myth. There are NO conclusive dynos or FACTS to say 3" > 2.5" > Stock.
With that said, see the dyno # in my sig? That was done w/ a 3" catback, do your own maxima dyno research and find any VQ30 dyno with more tq before 3k with just bolt ons untuned.
One more thing, when reading/listening to these post, take in account to who actually owns a 3" and who doesn't. It will go like this... People who do not have a 3" says that you will lose low end, people who OWN a 3" catback will say that you gain low end, now who's opinion will you take on a 3" catback?
03-14-2011, 07:18 PM
#129
Senior Member
Join Date: Jan 2006
Location: Fuk 301 it's 410 Bal Md black/purple.
Posts: 1,860
It goes like this.
It's all myth. There are NO conclusive dynos or FACTS to say 3" > 2.5" > Stock.
With that said, see the dyno # in my sig? That was done w/ a 3" catback, do your own maxima dyno research and find any VQ30 dyno with more tq before 3k with just bolt ons untuned.
One more thing, when reading/listening to these post, take in account to who actually owns a 3" and who doesn't. It will go like this... People who do not have a 3" says that you will lose low end, people who OWN a 3" catback will say that you gain low end, now who's opinion will you take on a 3" catback?
It's all myth. There are NO conclusive dynos or FACTS to say 3" > 2.5" > Stock.
With that said, see the dyno # in my sig? That was done w/ a 3" catback, do your own maxima dyno research and find any VQ30 dyno with more tq before 3k with just bolt ons untuned.
One more thing, when reading/listening to these post, take in account to who actually owns a 3" and who doesn't. It will go like this... People who do not have a 3" says that you will lose low end, people who OWN a 3" catback will say that you gain low end, now who's opinion will you take on a 3" catback?
05-12-2011, 07:54 PM
#131
Opinions please. If you had a boosted & built 3.5 swap on meth pushing 450+ whp. Do you think a 3.5" custom mandrell bent catback would be more beneficial than the 3" custom madrell bent catback. I have a local shop that says they can fit it on my 4 th gen.
Stock. 2"
Performance. 2.5"
High performance 3"
Super high performance 3.5". ????????????????????????
Stock. 2"
Performance. 2.5"
High performance 3"
Super high performance 3.5". ????????????????????????
Last edited by Tmars; 05-12-2011 at 07:56 PM.
Thread
Thread Starter
Forum
Replies
Last Post
My Coffee
New Member Introductions
15
06-06-2017 02:01 PM