any REAL gains for 3" vs. 2.5" pipe for true duals??
05-07-2005, 11:57 PM
#1
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any REAL gains for 3" vs. 2.5" pipe for true duals?? is there really any significant gain by using 3" piping vs. 2.5" for a true dual over the axle setup? I've got stock rear end/panhard bar and understand I would need to get a new panhard bar relocator kit to run 3" out the back (over the passenger side axle). Can I get decent flow with the 2.5" pipe and not have to mess with panhard bar relocation ( $$) and maybe gain a little more ground clearence, i'm all with that. i've searched around here and know lots of people run lots of things, but couldn't find a specific answer to my question. some type of 'numbers' would be nice (anyone done a compar-O?). if there's a link already, just show me the way! thx.
05-08-2005, 06:56 AM
#3
I kinda did the best of both worlds...3" into the X, 2.5" after for the rest of the system.
I can't do a 3" vs. 2.5" comparo, but I can tell you I went from 331/347 with a Hooker Aerochamber and Kooks catted-y to 340/356 with this setup. And if you'll look at some other posts in this section, you'll see the Hooker doesn't lose much to even a cutout. I was happy with the gain.
I can't do a 3" vs. 2.5" comparo, but I can tell you I went from 331/347 with a Hooker Aerochamber and Kooks catted-y to 340/356 with this setup. And if you'll look at some other posts in this section, you'll see the Hooker doesn't lose much to even a cutout. I was happy with the gain.
05-08-2005, 09:44 AM
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No difference unless your pushing 600 ponies+ and even then its not much. Its more for sound, 3"=more base more resonance 2.5"=less bass and less resonance but still sounds good.
05-08-2005, 09:19 PM
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Originally Posted by MeentSS02
I kinda did the best of both worlds...3" into the X, 2.5" after for the rest of the system.
I can't do a 3" vs. 2.5" comparo, but I can tell you I went from 331/347 with a Hooker Aerochamber and Kooks catted-y to 340/356 with this setup. And if you'll look at some other posts in this section, you'll see the Hooker doesn't lose much to even a cutout. I was happy with the gain.
I can't do a 3" vs. 2.5" comparo, but I can tell you I went from 331/347 with a Hooker Aerochamber and Kooks catted-y to 340/356 with this setup. And if you'll look at some other posts in this section, you'll see the Hooker doesn't lose much to even a cutout. I was happy with the gain.
05-09-2005, 06:39 AM
#6
Originally Posted by luv2spd
Your exhaust looks awesome! I wouldn't mine going that route myself someday. How much $ you got in that setup? Back on topic.....I don't think you'll gain any power going from 2.5" to 3" duals unless you're pushing some serious power.
05-09-2005, 08:40 AM
#7
I see you just painted it again meentss02. Looks good. Thanks for the new pics!
Also, running 3" to the X is a nice thing to have, but I see no reason why you'd need to run 3" past that in terms of flow. By the time the exhaust passes the X pipe, it has cooled and the gasses have contracted. Running too big a pipe will slow exhaust velocity due to the cooler exhaust gases shrinking. If you want to run 3" after the X pipe, you better have 3.5" collectors and pipe in front of the X.
-T
Also, running 3" to the X is a nice thing to have, but I see no reason why you'd need to run 3" past that in terms of flow. By the time the exhaust passes the X pipe, it has cooled and the gasses have contracted. Running too big a pipe will slow exhaust velocity due to the cooler exhaust gases shrinking. If you want to run 3" after the X pipe, you better have 3.5" collectors and pipe in front of the X.
-T
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05-09-2005, 12:55 PM
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yes, very nice setup on those duals there. I think 3" into the X, 2'5" out would fit my purpose nicely. I'm thinking of 2 sweet thunders running side by side after the X and before the axle, then over the passenger side axle. thanks for everyones input. I'll be ok with 2.5" running over the stock panhard bar, correct?
05-09-2005, 01:26 PM
#12
It can be done, but its easier if you push up the heat shield. I had to cut some incisions in it with some snips to bend it out of the way. Even still it bangs around a little bit so I took my brace off for the time being until i get another weekend I can fool around with it.
05-09-2005, 03:15 PM
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Originally Posted by MeentSS02
The panhard rod won't be your problem...it is the upper panhard brace that might be a little tight to squeeze over. It could probably be done with the stock piece, but I won't sign my name to that assertion.
haha....don't worry, no civil liability issues to worry about! i've been looking at the bmr setup with the relocation kit, but i'm trying to limit it to one project at a time, so to speak.
05-09-2005, 03:42 PM
#14
Originally Posted by gunfightrr
haha....don't worry, no civil liability issues to worry about! i've been looking at the bmr setup with the relocation kit, but i'm trying to limit it to one project at a time, so to speak.
05-11-2005, 10:38 PM
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yeah, i just came conclusion that if i was gonna spring $750 for a pair of freakin headers, i might as well go for broke with a true dual setup. i know there are plenty of people out there running good power thru a catback, but it just seems like there would just be too much flow going thru an I-pipe to realize the true potential of the LT's. plus, Kooks wanting $500 bills for a catted Y-pipe didn't help either!
05-21-2005, 01:21 AM
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Originally Posted by lilbuddy1587
No difference unless your pushing 600 ponies+ and even then its not much. Its more for sound, 3"=more base more resonance 2.5"=less bass and less resonance but still sounds good.
05-21-2005, 02:06 PM
#19
Originally Posted by MeentSS02
Thanks for the compliments...we'll see how long this paint job lasts
My guess...not long. If my car ever sees a garage and stops being my daily driver, it would probably hold up a bit better.
My guess...not long. If my car ever sees a garage and stops being my daily driver, it would probably hold up a bit better.
What kind of mufflers are you running in that system..it is very nice looking..it is real loud??
