Which exhaust is best for my TURBO LS? Best and cheapest?
09-27-2003, 07:52 AM
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Which exhaust is best for my TURBO LS? Best and cheapest?
Ok what exhaust should I run on my turbo ls? Brief overview of turbo plans: Junkyard turbo-garret tbo343 most likely, 8-10 psi max, uberdata, dsm 450's, intercooled.... should I just run 3" piping for all my intercooler and intake piping, then run 3" exhaust? OR 2.5" exhaust? I was thinkgin 2.5" straight pipe exhaust, no high flow cat, no muffler. Will this sound good or like ****? Can I get opinions on a setup that would not hinder the power, and sound ok? For little $$$
09-27-2003, 09:18 AM
#2
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Re: Which exhaust is best for my TURBO LS? Best and cheapest? (94lsboost)
dude you've seriously shown a lack of search function useage.
search. this has been covered 817439071461387 times.
search. this has been covered 817439071461387 times.
09-27-2003, 09:25 AM
#3
Re: Which exhaust is best for my TURBO LS? Best and cheapest? (94lsboost)
just run a 60mm. 2.25" intercooler piping all around. you'll be fine if that's all your going to boost
Modified by mamaboy at 7:24 PM 9/27/2003
Modified by mamaboy at 7:24 PM 9/27/2003
09-30-2003, 11:53 AM
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Re: Which exhaust is best for my TURBO LS? Best and cheapest? (94lsboost)
ok i've looked around and havent found an answer i like, so please dont say "SEARCH".... i have... I am considering 2.5", maybe 3" straight pipe, with a weld on muffler...(magnaflow?, bombz?) i need to know if this setup will help/hurt flow/hp? and if it's a decent setup reccommend me a muffler, also should i use a high flow cat, or resonator? ** sound/emissions is no prob where i live
09-30-2003, 12:13 PM
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Re: Which exhaust is best for my TURBO LS? Best and cheapest? (untensadude)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by untensadude »</TD></TR><TR><TD CLASS="quote">dude you've seriously shown a lack of search function useage.
search. this has been covered 817439071461387 times.</TD></TR></TABLE>
That many times huh?? hehe
Go 2.5" exhaust. That's good for the amount of boost you are seeing. If you have no emmissions and dno't care for the environment much, put a resonator in there, or testpipe.
search. this has been covered 817439071461387 times.</TD></TR></TABLE>
That many times huh?? hehe
Go 2.5" exhaust. That's good for the amount of boost you are seeing. If you have no emmissions and dno't care for the environment much, put a resonator in there, or testpipe.
09-30-2003, 12:22 PM
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2.5" mandrel bent piping from the downpipe would be your best exhaust. otherwise replace the stock cat w/ a test pipe http://www.accordinglydone.com...id=79 and just buy the exhaust piping from there too while you are at it. kick *** exhaust for $200+
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09-30-2003, 08:32 PM
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Re: Which exhaust is best for my TURBO LS? Best and cheapest? (94lsboost)
For exhaust I say go for a full 3", no cat if possible, from the turbo back. If you cant fit a 3" downpipe and are forced to have a smaller diameter immediately after the turbo, start going to 3" as soon as you can on the system. You may want to run more boost one day and this will only help. 2.5" will start to restrict flow with higher boost.
10-01-2003, 08:10 AM
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Re: Which exhaust is best for my TURBO LS? Best and cheapest? (highmilehatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by highmilehatch »</TD></TR><TR><TD CLASS="quote">For exhaust I say go for a full 3", no cat if possible, from the turbo back. If you cant fit a 3" downpipe and are forced to have a smaller diameter immediately after the turbo, start going to 3" as soon as you can on the system. You may want to run more boost one day and this will only help. 2.5" will start to restrict flow with higher boost.</TD></TR></TABLE>
i agree with highmilehatch
i agree with highmilehatch
10-01-2003, 08:13 AM
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Re: Which exhaust is best for my TURBO LS? Best and cheapest? (boosted eg)
ok so just do 3" pipe pretty much everywhere? would that be best? for the intercooler piping and all....then run 3" all the way back, no cat. What about a muffler? should i run no muffler also? Or pick up a bomz or something like that? I have heard that turbo cars with 3" exhaust and no cat/muffler sound pretty mean...anyone????
10-01-2003, 08:48 AM
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Re: (greekspeed)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by greekspeed »</TD></TR><TR><TD CLASS="quote">open downpipe..... 
</TD></TR></TABLE>
i was waiting for that responce...... Best Exhaust for a turbo is No Exhaust......
</TD></TR></TABLE> i was waiting for that responce...... Best Exhaust for a turbo is No Exhaust......
10-01-2003, 08:51 AM
#14
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Re: Which exhaust is best for my TURBO LS? Best and cheapest? (94lsboost)
i have an Apexi N1 full cat back for sale that will fit right up to that if interested.
10-01-2003, 08:56 AM
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3" is too big...you will end up making less hp since you are boosting only 10 psi...i really suggest 2.5"...and muffler is not necessary...or suggested...really the turbo acts like a muffler...
10-01-2003, 08:59 AM
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Re: (bigwig)
i made 295whp on 8psi with the exhaust on . on the new motor i was pushing around 400 to the wheels with the exahasut on on 12 psi . tihs is 2.5 inch Apexi N1. it cant be that bad
10-01-2003, 09:04 AM
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Re: (itr206)
And what are you running now and why? I'm sure when you upgraded you got better spool and probably gained power. the goal with a turbo exhaust system is zero back pressure. if 2.5" gives you that then great.. if it takes 4" that that is what you need.
10-01-2003, 09:10 AM
#20
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Re: (Overblown-Teg)
the car isnt a street car now so i took the exhaust off and im gonn a run stright off the turbo out the fender. less weight. and yes the spool up will be a little better.
is this guy looking for 500-600hp? if he's looking for moderate boost 2.5 will work fine , my spool on a t3-04e 60 trim intake side and 82 ex side started spool under 3k and full spool at like 4600 or so wit the exhaust on . \
some of the thing speople preach here are overrated in my eyes.
matter of fact on lower boost levels i lost hp from opening up the exhaust.
is this guy looking for 500-600hp? if he's looking for moderate boost 2.5 will work fine , my spool on a t3-04e 60 trim intake side and 82 ex side started spool under 3k and full spool at like 4600 or so wit the exhaust on . \
some of the thing speople preach here are overrated in my eyes.
matter of fact on lower boost levels i lost hp from opening up the exhaust.
10-01-2003, 09:10 AM
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Re: (Overblown-Teg)
A 3" exhaust gains are going to depend on how much boost pressure you are running. The less boost pressure, the more the wastegate is bleeding the exhaust gas/energy from the system. When this occurs there is less exhaust gas placed onto the turbine blade, and exited through the turbine housing. The less exhaust gas, the less backpressure built up inside of the exhaust system. Backpressure in a turbine housing is attributed to the exhaust gas going from very turbulent situation exiting the blades, and meeting a small diameter piping. The small piping limits how quickly the exhaust gas is allowed to turn to laminar, or smoother flowing. Back pressure builds up due to the smaller diameter of the piping, and causes a bottle neck after the turbine blade. This is the restriction that will make you loose horsepower since you cannot dispense the gases quick enough. The more boost pressure you run, the more you need a larger diameter exhaust. So to answer your question correctly, the amount of horsepower you'll gain is directly attributed to the boost pressure you are running. Gains from 5whp (lower boost levels) to 40-50whp (high boost levels) can be found depending on which size diameter piping you are upgrading from. The et's will drop corresponding to the horsepower increase.
This is by Jeff Evans...aka boosted hybrid...i trust his word
so pretty much 5whp for going 3" and a lot more headaches b/c its a harder pipe to run....i would go 2.5"...save $5 and less headaches w/ the DP
This is by Jeff Evans...aka boosted hybrid...i trust his word
so pretty much 5whp for going 3" and a lot more headaches b/c its a harder pipe to run....i would go 2.5"...save $5 and less headaches w/ the DP
10-01-2003, 09:14 AM
#22
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Re: (bigwig)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bigwig »</TD></TR><TR><TD CLASS="quote">A 3" exhaust gains are going to depend on how much boost pressure you are running. The less boost pressure, the more the wastegate is bleeding the exhaust gas/energy from the system. When this occurs there is less exhaust gas placed onto the turbine blade, and exited through the turbine housing. The less exhaust gas, the less backpressure built up inside of the exhaust system. Backpressure in a turbine housing is attributed to the exhaust gas going from very turbulent situation exiting the blades, and meeting a small diameter piping. The small piping limits how quickly the exhaust gas is allowed to turn to laminar, or smoother flowing. Back pressure builds up due to the smaller diameter of the piping, and causes a bottle neck after the turbine blade. This is the restriction that will make you loose horsepower since you cannot dispense the gases quick enough. The more boost pressure you run, the more you need a larger diameter exhaust. So to answer your question correctly, the amount of horsepower you'll gain is directly attributed to the boost pressure you are running. Gains from 5whp (lower boost levels) to 40-50whp (high boost levels) can be found depending on which size diameter piping you are upgrading from. The et's will drop corresponding to the horsepower increase.
This is by Jeff Evans...aka boosted hybrid...i trust his word
so pretty much 5whp for going 3" and a lot more headaches b/c its a harder pipe to run....i would go 2.5"...save $5 and less headaches w/ the DP</TD></TR></TABLE>
i agree with thatbecuase i have tested it on the dyno and the track in diff set ups.
This is by Jeff Evans...aka boosted hybrid...i trust his word
so pretty much 5whp for going 3" and a lot more headaches b/c its a harder pipe to run....i would go 2.5"...save $5 and less headaches w/ the DP</TD></TR></TABLE>
i agree with thatbecuase i have tested it on the dyno and the track in diff set ups.
10-01-2003, 09:35 AM
#24
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Re: (Overblown-Teg)
please explain on what you diagree with, if you mean to tell me you will always gain with bigger piping,/less abck pressure that is an ignorant guess and i can prove you wrong with dyno results.
10-01-2003, 09:39 AM
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i agree w/ itr...it even makes sense logically...3" exhaust is ncessary for lets say 15psi...but 10 2.5" will be fine. it will be more than fine...it will be excellent.