Page 1 of 2 12 LastLast
Results 1 to 20 of 36

Which exhaust generates the best power?

This is a discussion on Which exhaust generates the best power? within the External Engine forums, part of the LSx Technical Help Section category; The topic speaks for itself, which exhaust generates the most power?...

  1. #1
    Member R_Yates69@Hotmail.com's Avatar
    Join Date
    Aug 2005
    Location
    Nova Scotia, Canada
    Age
    33
    Posts
    239

    Red
    1999 Trans Am

    Which exhaust generates the best power?

    The topic speaks for itself, which exhaust generates the most power?

  2. #2
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    so does the search.......there is not generic best exhaust

    the highest flowing/least restrictive exhaust will generate the most power in general.
    the size of the pipe almost plays into it

    a custom true dual exhaust without mufflers..so straight pipes...will produce the most power.

    the question is soooooooooooo open ended there are countless possibilities

  3. #3
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    True duals dumped before the axle.


    As for catbacks....they tend to be within a few HP of each other, with the Flowmaster bringing up the rear (for whatever reason).

  4. #4
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    Dis agree. True duals make great power.... and sound. But I bet a 4" Mufflex with a nice cat back makes more power. Now, if your talking dumped before the axle, I bet they are close. I would still put my money on the 4" Mufflex or similar style. I could be wrong.

    You can go wrong with either really. They will both make great power and sound.
    370 CI - Twin 6766 Turbo - Jakes stage 5 4L80E - MWC 9" - Holley Dominator

    Build in progress...

  5. #5
    Member R_Yates69@Hotmail.com's Avatar
    Join Date
    Aug 2005
    Location
    Nova Scotia, Canada
    Age
    33
    Posts
    239

    Red
    1999 Trans Am

    Ok I def worded this wrong, thanks for the help anyways, I think i'll just take this to pms lol

  6. #6
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by R_Yates69@Hotmail.com View Post
    Ok I def worded this wrong, thanks for the help anyways, I think i'll just take this to pms lol
    its all good

  7. #7
    Turgid Member Goat-E's Avatar
    Join Date
    Jun 2009
    Location
    Hollywood, Florida by way of Da' Burgh
    Posts
    390

    Impulse Blurr
    2004 GTO

    An insulated exhaust. The insulation holds the heat in whereby causing the gasses to expand and move faster. This causes more scavenging and better flow. You need to do the math on cross-section and determine delta pressure. 2-5 lbs delta pressure helps to maintain low end torque. I am running a manifold back like this. 2.25 x 2 y'd into a single 3 inch with highflow cats and a straight through muffler before the bumper. There were a lot of physics advantages to this setup. All magnaflow equipment. It all depends on what you want and intend to do. I'm only expecting around 425 hp buy the end of my MOD plans. (This is not a joke shady)
    Last edited by Goat-E; 08-14-2009 at 03:25 PM.

  8. #8
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    If you want a simple 3 inch catback, you can't go wrong with any of them really. They all perform nearly identical. Just pick a sound you can live with and a price you can afford.

    If you want better performance than a 3 inch catback then there are a few different routes to go,,,

    Start looking at mufflex for a 3 1/2 or 4 inch catback. I vote for the 4 inch,,,best system I've ever tried on a 4th gen.

    If you want a real dual system you can custom bend one, or buy a system that dumps in front of the axle, or my personal vote would be to pony up for a Bassani true dual setup.

  9. #9
    Quote Originally Posted by Hi-Po View Post
    Dis agree. True duals make great power.... and sound. But I bet a 4" Mufflex with a nice cat back makes more power. Now, if your talking dumped before the axle, I bet they are close. I would still put my money on the 4" Mufflex or similar style. I could be wrong.

    You can go wrong with either really. They will both make great power and sound.
    Maybe the newer Magnaflow Mufflex systems are better, but the Spintech dual out I originally had and then the Flowmaster single out where outrageously heavy, and as I later found out fairly restrictive. The Spintech is terrible! I gained quite a bit by slipping off the catback on the dyno.

    I now have 3" duals with single chamber Flowmasters and the power and sound cannot be beat, I don't care what you run. I gained NOTHING by dropping that setup.

    Quote Originally Posted by Goat-E
    2-5 lbs back pressure helps to maintain low end torque
    You're misinformed. I mean, seriously? 2-5 psi backpressure would restrict HUGE amounts of power
    Last edited by Marc 85Z28; 08-13-2009 at 11:02 AM.

  10. #10
    515 HP TrickFlow Package BADASS2000SS's Avatar
    Join Date
    Feb 2008
    Location
    Palm Beach, FL
    Age
    40
    Posts
    1,702

    440 RWHP / 410 TQ
    2000 SLP CAMARO SS

    Quote Originally Posted by Hi-Po View Post
    Dis agree. True duals make great power.... and sound. But I bet a 4" Mufflex with a nice cat back makes more power. Now, if your talking dumped before the axle, I bet they are close. I would still put my money on the 4" Mufflex or similar style. I could be wrong.

    You can go wrong with either really. They will both make great power and sound.
    I would love to see someone try to fit a 4" exahust under a Camaro!
    2000 SLP Camaro SS M6 * 515 HP TrickFlow Package * FAST 92 MM Intake * Nick Williams 92 MM TB * Volant CAI * Granatelli MAF * Full Custom True Dual Exhaust with X-Pipe * Tuned by Breathless Performance

  11. #11
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    Were not talking about TWO 4" pipes. One single. I cant help but think a Camaro underbody is much different then a TA's... but maybe it is. Mine is a fabb'd up piece. Just like Mufflex, just done by someone else by hand.

    The SpinTech is fairly restrictive, yes. It sounds good though IMO. But, when talking about certain cat-backs being more restrcitive over another... My 4" electric cutout stops the discussion on my part Always open.

  12. #12
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    And im still trying to figure how one could type such a short, to the point sentence... And a thread title for that matter... and mis word it. Seems pretty cut and dry to me

  13. #13
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    We found with track testing a 450+ rwhp camaro that the 4 inch mufflex gave the best performance. Didn't matter if we stuck the Spintech or the flowmaster muffler on it.
    At the time Magnaflow wasn't in the picture when it came to 4 inch systems. Maybe that muffler is better,,,,but I can't comment for sure.

    This was compared to all the 3 inch catback systems we tried that can be store bought and bolted on with simple tools.

    Now when you get into dual systems,,,the cards change dramatically. We unfortunately never got to try it on this car,,,the Bassani was too expensive to purchase just for testing, and the owner of this car didn't want a fabbed up system under the car with dual mufflers that would compromise ground clearance, so that was out of the question as well.

  14. #14
    Turgid Member Goat-E's Avatar
    Join Date
    Jun 2009
    Location
    Hollywood, Florida by way of Da' Burgh
    Posts
    390

    Impulse Blurr
    2004 GTO

    Quote Originally Posted by Marc 85Z28 View Post
    You're misinformed. I mean, seriously? 2-5 psi backpressure would restrict HUGE amounts of power
    Did I say anything about horsepower? If you don't keep a minimum amount of resistance your bottom end torque will go to s**t along with your fuel mileage. Daily driving is not wide open throttle and upper RPM's. I researched exhaust design and principle for over 2 months almost daily before deciding on my custom exhaust design. Depending on what your application if you are using the vehicle for a DD there should be some balance. I would like for you to try to tell me that the penultimate setup for street use is open 3 inch headers. That measure is what I found from several sources so if you have a problem with it go argue with them. My exhaust works wonderfully for my application FYI!
    I'm running stock manifolds with highflow cats with the 2.25 inch pipes Y'd into a single 3 inch and a Magnaflow 3 inch in/out straight through muffler hung in the insulated recess just before the rear bumper. Does not sound radical at all, nice deep rumble and probably gained near 380 square ft per minute of flow over the stock 2 inch duals while maintaining a slight initial "Delta" (previously back) pressure at the cats.
    Last edited by Goat-E; 08-14-2009 at 03:28 PM.

  15. #15
    515 HP TrickFlow Package BADASS2000SS's Avatar
    Join Date
    Feb 2008
    Location
    Palm Beach, FL
    Age
    40
    Posts
    1,702

    440 RWHP / 410 TQ
    2000 SLP CAMARO SS

    Quote Originally Posted by Hi-Po View Post
    Were not talking about TWO 4" pipes. One single. I cant help but think a Camaro underbody is much different then a TA's... but maybe it is. Mine is a fabb'd up piece. Just like Mufflex, just done by someone else by hand.

    The SpinTech is fairly restrictive, yes. It sounds good though IMO. But, when talking about certain cat-backs being more restrcitive over another... My 4" electric cutout stops the discussion on my part Always open.
    I can see one 4 inch pipe making it to the back. It would have to go down the passenger side though. Having a cutout on a single 4 inch pipe has to be badass! I can only imagine the noise that must make! I say "the louder, the better"

  16. #16
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Goat-E View Post
    Did I say anything about horsepower? If you don't keep a minimum amount of resistance your bottom end torque will go to s**t along with your fuel mileage. Daily driving is not wide open throttle and upper RPM's. I researched exhaust design and principle for over 2 months almost daily before deciding on my custom exhaust design. Depending on what your application if you are using the vehicle for a DD there should be some balance. I would like for you to try to tell me that the penultimate setup for street use is open 3 inch headers. That measure is what I found from several sources so if you have a problem with it go argue with them. My exhaust works wonderfully for my application FYI!
    I'm running stock manifolds with highflow cats with the 2.25 inch pipes Y'd into a single 3 inch and a Magnaflow 3 inch in/out straight through muffler hung in the insulated recess just before the rear bumper. Does not sound radical at all, nice deep rumble and probably gained near 380 square ft per minute of flow over the stock 2 inch duals while maintaining a slight initial backpressure at the cats.
    Click for full size
    i have issue with you saying you need to keep some sort of backpressure to make power ..i am sure you misspoke and were referring to delta pressure
    Last edited by shady milkman; 08-14-2009 at 06:41 AM.

  17. #17
    Quote Originally Posted by Goat-E View Post
    I researched exhaust design and principle for over 2 months almost daily before deciding on my custom exhaust design... That measure is what I found from several sources so if you have a problem with it go argue with them.
    What sources? Other misinformed people on the internet spreading myths?

    What is next? A restrictor in your intake tract to help low end torque too?

    You're exhaust works wonderfully for your application? How would you know? You have nothing else to compare it to other than stock.
    Last edited by Marc 85Z28; 08-14-2009 at 07:54 AM.

  18. #18
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    Quote Originally Posted by BADASS2000SS View Post
    I can see one 4 inch pipe making it to the back. It would have to go down the passenger side though. Having a cutout on a single 4 inch pipe has to be badass! I can only imagine the noise that must make! I say "the louder, the better"
    I cant think of any exhuast system I would trade my single 4" custom with single 4" E-DMH cutout for. With that cutout open, its stupid loud. In a good way

  19. #19
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Hi-Po View Post
    I cant think of any exhuast system I would trade my single 4" custom with single 4" E-DMH cutout for. With that cutout open, its stupid loud. In a good way
    id believe it

  20. #20
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    For those that want to get technical on backpressures and restriction on exhaust systems there is an easy way to test any system.

    A simple vacuum gauge attatched to an exhaust bung will tell you how much restriction you really have. Most systems will show 2-3 inches of vacuum, pretty typical. Ideally you want "0"
    If you have more than 2-3 inches then you have something choking the motor down and costing HP.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. SLP power flo exhaust......
    By pewterzron in forum External Engine
    Replies: 9
    Last Post: 02-23-2011, 01:09 PM
  2. Power Boost - Exhaust for stock SS
    By CaptainCrunch42 in forum External Engine
    Replies: 1
    Last Post: 04-01-2007, 08:08 PM
  3. LS7 Power with Cam and Full Exhaust
    By Roastem in forum Corvette
    Replies: 14
    Last Post: 05-11-2006, 10:33 PM
  4. exhaust.... what makes more power?
    By EVL LS1 in forum General Help
    Replies: 7
    Last Post: 11-21-2005, 08:40 PM
  5. Exhaust Y Pipe Question...Power Loss?
    By HiLL99SS in forum External Engine
    Replies: 11
    Last Post: 09-28-2005, 07:53 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •