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are bullet mufflers enough to create backpressure?

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Old Feb 12, 2011 | 08:43 AM
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Default are bullet mufflers enough to create backpressure?

looking for a better combo to create more back pressure/power

currently running lontubes to 2.5 piping with cherry bomb bullets dumped.

whats a different set up to create more back pressure/power?

need to go to chambered mufflers? also y pipe from the headers or x pipe? how far should the piping be run back? any pics or idea area appreciated
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Old Feb 12, 2011 | 08:51 AM
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why are you looking for more back pressure? Wouldn't little to no back pressure with a scavenging effect provide maximum power gains? Sorry ahead of time if I'm wrong
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Old Feb 12, 2011 | 08:55 AM
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Originally Posted by WomenBeShoppin
why are you looking for more back pressure? Wouldn't little to no back pressure with a scavenging effect provide maximum power gains? Sorry ahead of time if I'm wrong

you need some back pressure. on my srt i unbolted the exhaust from behind the cats, drove it around for about a year, then bolted the stock exhaust back on(piping, resonators and mufflers) realized the exhaust and having back pressure made a huge difference... response was much better, the car shifted better ect...

i know you need to have some back pressure as the exhaust now is basically straight pipes with straight through cherry bombs.. feel like adding a little back pressure would add some more power...
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Old Feb 12, 2011 | 08:56 AM
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just not sure what the best way of going about it is.. i.e muffler choice and piping and routing of piping
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Old Feb 12, 2011 | 09:18 AM
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http://www.uucmotorwerks.com/html_pr...torquemyth.htm
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Old Feb 12, 2011 | 10:25 AM
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^^Word

Cars do not need backpressure but tuning helps if you go to bullet mufflers
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Old Feb 12, 2011 | 10:25 AM
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Originally Posted by chevyrunner
you need some back pressure. on my srt i unbolted the exhaust from behind the cats, drove it around for about a year, then bolted the stock exhaust back on(piping, resonators and mufflers) realized the exhaust and having back pressure made a huge difference... response was much better, the car shifted better ect...

i know you need to have some back pressure as the exhaust now is basically straight pipes with straight through cherry bombs.. feel like adding a little back pressure would add some more power...

can't use mopar technology with chevy!
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Old Feb 12, 2011 | 10:35 AM
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i had torque tech "powersticks" on my tsp dual dumps..nevr noticed a problem with low end really but my main concern was the power at hi rpm at wot
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Old Feb 12, 2011 | 03:10 PM
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Back pressure does not equal power gain.
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Old Feb 12, 2011 | 04:01 PM
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Originally Posted by chevyrunner
you need some back pressure. on my srt i unbolted the exhaust from behind the cats, drove it around for about a year, then bolted the stock exhaust back on(piping, resonators and mufflers) realized the exhaust and having back pressure made a huge difference... response was much better, the car shifted better ect...

i know you need to have some back pressure as the exhaust now is basically straight pipes with straight through cherry bombs.. feel like adding a little back pressure would add some more power...
the srt probably just need tuning without tuning the unbolt exhaust caused a negative effect
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Old Feb 12, 2011 | 04:32 PM
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Back pressure causes exhaust gas to be re introduced to the exhaust valve, the point is to effectivel remove the exhaust gases from the cylinder to make more power. If you increase torque or rpm, you increase HP as hp is the end result.

LSx motors don't really require "backpressure" that is something more for emissions as it forces exhaust gases back tot he CC, and not out the tail pipe. If you have your car tuned correctly it will run great, so run whatever exhaust you want but the idea os to get the air out quickly so when the intake valve starts opening it can fill the cylinder with fresh cooler air.
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Old Feb 12, 2011 | 08:17 PM
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you want more scavenging
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Old Feb 12, 2011 | 09:06 PM
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Originally Posted by cntrmnt02ss
you want more scavenging
what is scavenging?
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Old Feb 12, 2011 | 09:12 PM
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so if it doesnt matter what exhaust you run why is everyone always talking about x pipes and y pipes? not being sarcastic just asking....

there has to be one exhaust set up that is better than just running cherry bombs dumped from the long tubes.. anyone?
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Old Feb 12, 2011 | 09:33 PM
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Originally Posted by chevyrunner
you need some back pressure. on my srt i unbolted the exhaust from behind the cats, drove it around for about a year, then bolted the stock exhaust back on(piping, resonators and mufflers) realized the exhaust and having back pressure made a huge difference... response was much better, the car shifted better ect...

i know you need to have some back pressure as the exhaust now is basically straight pipes with straight through cherry bombs.. feel like adding a little back pressure would add some more power...
this is because you lost exhaust scavenging which helps pull the exhaust fumes out of the engine. Backpressure will cause a loss in power.
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Old Feb 12, 2011 | 09:34 PM
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Originally Posted by chevyrunner
so if it doesnt matter what exhaust you run why is everyone always talking about x pipes and y pipes? not being sarcastic just asking....

there has to be one exhaust set up that is better than just running cherry bombs dumped from the long tubes.. anyone?
ya if you put an x pipe on there with no mufflers or cutouts. But you wont gain very much with that but it would be ideal.
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Old Feb 12, 2011 | 09:35 PM
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Originally Posted by 180ls1
ya if you put an x pipe on there with no mufflers or cutouts. But you wont gain very much with that but it would be ideal.
how bout x pipe from the ltubes with the cherry bombs?

or x pipe on there with a chambered borla or magna flow mufflers?
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Old Feb 12, 2011 | 10:20 PM
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Why not just get a dual set-up?

Systems are already made and proven. Ease your worries and handle the power/back pressure issue with a simple bolt-on

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Old Feb 12, 2011 | 10:23 PM
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Originally Posted by djsanchez2
Why not just get a dual set-up?

Systems are already made and proven. Ease your worries and handle the power/back pressure issue with a simple bolt-on

thats what im thinking about doing but heres 2 questions i have about that pic:

1. isnt the x pipe part suppose to connect to each other? in that pic it just looks like they are welded together but no air is flowing between the two.

2. what if i did that same set up with chambered mufflers? would that be better then that set up with cherry bombs?
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Old Feb 12, 2011 | 10:30 PM
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do a search for specifics on scavenging, but it basically is when your exhaust system is almost sucking the exhaust gases out of the engine because of differences in pressure. you removed the scavenging from your srt... probably why you noticed a power loss.
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