Page 2 of 3 FirstFirst 123 LastLast
Results 21 to 40 of 42

true duals (dumped or all the way out the back)

This is a discussion on true duals (dumped or all the way out the back) within the External Engine forums, part of the LSx Technical Help Section category; 2.5" duals are good up until 500-550 HP. Forced induction is about the same but 3" is recommended at the ...

  1. #21
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    Location
    doylestown, Pa
    Posts
    6,818

    SILVER
    2004 CTS-V

    2.5" duals are good up until 500-550 HP. Forced induction is about the same but 3" is recommended at the same power level but you can get away with 2.5"

    3" will be tight. Chances are, the shop that does the work (no matter how good they tell you they are) is not going to tuck it up like you want and it will drag.

    99% of shops are going to compression bend the pipes no matter whether they tell you.

    Mandrel bent is the way to go especially if you decide to go 2.5". Building true duals with mandrel bent pipe requires many mandrel bent pieces that must be cut and fabbed together. This method is typically expensive ($700-$1,200) but less expensive than having a shop mandrel bend the whole system as a unit would would cost $2K or more typically!

    No matter what you do, get a panhard bar relocation kit. But remember, if you are lowered, you will also need panhard bar relocation kit for the rear.

  2. #22
    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 9t8z28 View Post

    No matter what you do, get a panhard bar relocation kit. But remember, if you are lowered, you will also need panhard bar relocation kit for the rear.
    huh ?

  3. #23
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    Location
    doylestown, Pa
    Posts
    6,818

    SILVER
    2004 CTS-V

    Quote Originally Posted by shady milkman View Post
    huh ?
    At factory ride height, your panhard bar is or should be parallel with the ground.

    When you lower a car, the panhard bar is now on an angle. (This is especially bad if you have 315's on the back because as the rear goes up and down it is now moving more to the right as the suspension compresses) SORRY, I GOT OFF OF TOPIC BUT IT ALL STEMS FROM THE PANHARD)
    Anyway, now the panhard bar is on an upward angle from the right to the left. When you install the panhard bar relocation kit, the relocation bar will now be so close to panhard bar that they will contact each other as the suspension travels.

    This is before the panhard bar relocation kit for the rear. Notice how close ther panhard is to the brace?


    Notice the upward angle of the panhard?



    the panhard bar relocation kit for the rear lowers the driverside so that the bar is now parallel to the ground. I have pics of it but I need to find them.

    This is the panhard bar relocation kit from Jegs. It mounts in the same location as the panhard would when secured to the rear.

    http://www.jegs.com/i/Jegster/550/41055/10002/-1
    Last edited by 9t8z28; 10-26-2009 at 07:16 PM.

  4. #24
    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 9t8z28 View Post
    At factory ride height, your panhard bar is or should be parallel with the ground.

    When you lower a car, the panhard bar is now on an angle. (This is especially bad if you have 315's on the back because as the rear goes up and down it is now moving more to the right as the suspension compresses) SORRY, I GOT OFF OF TOPIC BUT IT ALL STEMS FROM THE PANHARD)
    Anyway, now the panhard bar is on an upward angle from the right to the left. When you install the panhard bar relocation kit, the relocation bar will now be so close to panhard bar that they will contact each other as the suspension travels.

    This is before the panhard bar relocation kit for the rear. Notice how close ther panhard is to the brace?
    Click for full size

    Notice the upward angle of the panhard?

    Click for full size

    the panhard bar relocation kit for the rear lowers the driverside so that the bar is now parallel to the ground. I have pics of it but I need to find them.

    This is the panhard bar relocation kit from Jegs. It mounts in the same location as the panhard would when secured to the rear.

    http://www.jegs.com/i/Jegster/550/41055/10002/-1
    ohhhh ok..thanks man

  5. #25
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by 9t8z28 View Post
    2.5" duals are good up until 500-550 HP. Forced induction is about the same but 3" is recommended at the same power level but you can get away with 2.5"
    guess my 663 rwhp is an exception.

    i run the bassani 2.5" tru-duals on both cars. doesn't need a upper panhard relocation kit either.

    also, some states require the exhaust to exit past the passenger compartment. so, dumping under the car might cause you some legal issues.




  6. #26
    Sold: LS1 '85 El Camino ls1camino's Avatar
    Join Date
    Dec 2005
    Location
    Laurel, Maryland
    Posts
    4,977

    2000 Grand Prix GTP
    2000 Trans Am WS6 M6

    Quote Originally Posted by mrr23 View Post
    guess my 663 rwhp is an exception.

    i run the bassani 2.5" tru-duals on both cars. doesn't need a upper panhard relocation kit either.

    also, some states require the exhaust to exit past the passenger compartment. so, dumping under the car might cause you some legal issues.

    Click for full size

    Click for full size
    I have a body mounted torque arm...would this exhaust system fit with that there?

  7. #27
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    Location
    doylestown, Pa
    Posts
    6,818

    SILVER
    2004 CTS-V

    Quote Originally Posted by mrr23 View Post
    guess my 663 rwhp is an exception.

    i run the bassani 2.5" tru-duals on both cars. doesn't need a upper panhard relocation kit either.

    also, some states require the exhaust to exit past the passenger compartment. so, dumping under the car might cause you some legal issues.

    Click for full size

    Click for full size



    No, it is not an exception. You would make alot more power with a larger exhaust and I am not recommending that you go larger. The Bassani system is nice for the price but it could use some improvement as far as ground clearance and you are limited to suspension modifications.

  8. #28
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    Location
    doylestown, Pa
    Posts
    6,818

    SILVER
    2004 CTS-V

    Quote Originally Posted by ls1camino View Post
    I have a body mounted torque arm...would this exhaust system fit with that there?
    No, it would not fit.

  9. #29
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by 9t8z28 View Post
    No, it is not an exception. You would make alot more power with a larger exhaust and I am not recommending that you go larger. The Bassani system is nice for the price but it could use some improvement as far as ground clearance and you are limited to suspension modifications.
    i can't see how i would make alot more power with another 1/2" diameter of piping per side.

    don't have any ground clearance issues as i am stock height on both cars. the pipe at the driver's header it is 4" off the ground.

    what suspension limitations do i have with the bassani? it doesn't interfere with any suspension pieces at all. there are a few cars running 7s with stock style/type/location suspension.
    Last edited by mrr23; 10-29-2009 at 06:49 PM.

  10. #30
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    Location
    doylestown, Pa
    Posts
    6,818

    SILVER
    2004 CTS-V

    Quote Originally Posted by mrr23 View Post
    i can't see how i would make alot more power with another 1/2" diameter of piping per side.

    don't have any ground clearance issues as i am stock height on both cars.

    what suspension limitations do i have with the bassani? it doesn't interfere with any suspension pieces at all.
    At your power lever? Sure you would. No doubt. At my power level, I could (at least) see an additional 20HP besides the fact that I am FI.

    The Bassani kit is limited to a stock or aftermarket tranny mounted torque arm and no aftermarket rears.

  11. #31
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by ls1camino View Post
    I have a body mounted torque arm...would this exhaust system fit with that there?
    which body mount torque arm? the BMR Trak Pak, no. a TA that's mounted where the tunnel brace is should clear.

  12. #32
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    Location
    doylestown, Pa
    Posts
    6,818

    SILVER
    2004 CTS-V

    Quote Originally Posted by mrr23 View Post
    which body mount torque arm? the BMR Trak Pak, no. a TA that's mounted where the tunnel brace is should clear.
    It's impossible without modifying it.

  13. #33
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by 9t8z28 View Post
    At your power lever? Sure you would. No doubt. At my power level, I could (at least) see an additional 20HP besides the fact that I am FI.

    The Bassani kit is limited to a stock or aftermarket tranny mounted torque arm and no aftermarket rears.
    aftermarket rear isn't a suspension piece. but it might not clear a 9". granted i have never broke a stock rear. then again, it still goes over the passenger side.

    for 20hp, i'll just up the pill on the kit.
    Last edited by mrr23; 10-29-2009 at 06:57 PM.

  14. #34
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by 9t8z28 View Post
    It's impossible without modifying it.
    hmm, yeah the torque arm gets in the way there. spohn has a torque arm that mounts to the trans crossmember. so, still can take TA off the trans itself. so, still not impossible to use it with aftermarket mounted TAs.

  15. #35
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    Location
    doylestown, Pa
    Posts
    6,818

    SILVER
    2004 CTS-V

    Quote Originally Posted by mrr23 View Post
    aftermarket rear isn't a suspension pice. but it might not clear a 9". granted i have never broke a stock rear. then again, it still goes over the passenger side.

    for 20hp, i'll just up the pill on the kit.
    No, I said I would gain 20 HP, you would gain even more. I don't expect you to experiment, but do some research (dig deep) and you will find it.

    Sorry to the thread starter for getting off of the subject.

  16. #36
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by 9t8z28 View Post
    No, I said I would gain 20 HP, you would gain even more. I don't expect you to experiment, but do some research (dig deep) and you will find it.

    Sorry to the thread starter for getting off of the subject.
    missed that. you did say i.

    not really off the subject. it's still about getting a true dual system on his car and making sure he gets the right one.

    i've talked this system over with daryl bassani himself. if i was trying for 8s maybe, but he's built plenty of dual 2.5" systems on race cars that propel deep into the 9s. for a street car, that's plenty quick enough. hell having close to 700 rwhp on the street just isn't useful. and there's just not that many on the street daily.

    last time i was out at the track, i went 10.85 @ 127 without the 250 direct port. i had since upgraded the intake and heads, but hadn't went to the track before selling it. i miss my car.
    Last edited by mrr23; 10-29-2009 at 07:06 PM.

  17. #37
    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 mrr23 View Post
    i went 10.85 @ 127 without the 250 direct port. i had since upgraded the intake and heads, but hadn't went to the track before selling it. i miss my car.
    i miss your car too rob

  18. #38
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by shady milkman View Post
    i miss your car too rob
    i miss you missing my car

  19. #39
    Just me Y2KPewterSS's Avatar
    Join Date
    Nov 2006
    Location
    Broken Arrow, OK
    Age
    42
    Posts
    23,353

    Pewter metallic
    2000 Camaro SS

    Quote Originally Posted by mrr23 View Post
    i miss you missing my car
    Did you see the picture of Shady that is a sticky in the mod forum?

  20. #40
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    nope

Page 2 of 3 FirstFirst 123 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. pics of t/a's with dumped duals.
    By K_garretson23 in forum Firebird / WS6
    Replies: 2
    Last Post: 07-24-2011, 02:53 PM
  2. LT's and True Duals out the back at cold start
    By bryceslu in forum External Engine
    Replies: 1
    Last Post: 10-24-2010, 05:34 PM
  3. TSP true duals/cutouts/sweetthunders out the back
    By chickenZ28 in forum Parts For Sale / Trade
    Replies: 0
    Last Post: 04-08-2007, 08:07 PM
  4. Replies: 1
    Last Post: 08-26-2005, 12:18 PM
  5. Replies: 0
    Last Post: 08-17-2005, 06:29 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
  •