Results 1 to 10 of 10

what is the hp gain on from a header install?

This is a discussion on what is the hp gain on from a header install? within the External Engine forums, part of the LSx Technical Help Section category; About to install Texas speed heads on my 99 trans, what is the hp gain from a header install with ...

  1. #1
    Member
    Join Date
    Oct 2005
    Location
    Vicksburg. Ms.
    Posts
    433

    pewter
    99 Trans Am

    Question what is the hp gain on from a header install?

    About to install Texas speed heads on my 99 trans, what is the hp gain from a header install with a mail order tune? I need to hear from someone that have proof of a true hp gain.not what the claim is, if I am going to spend $1000 bucks I need to know it will be worth it.

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    About 20-25 gains with LS6 intake, P&P TB and 241 stock heads.

    P&P the heads and you'll squeeze out another 5-10 (241 heads)


    It all depends on the tune as well.

  3. #3
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    I merged your 2 threads OP.

  4. #4
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    What Scott said. Like anything else, the gains will be greatest when combined with other changes - such as a tune, a catback, and an intake.

    (I deleted the second post as it was a duplicate )

  5. #5
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    OP It is well worth doing Headers, ORY, and a good muffler.

    I like the rumble of Magnaflow, others like Flowmasters (IMHO too raspy), I also like SLP's LM1 as well (but these will make you friends with your neighbors and LEO's quickly )

  6. #6
    Moderator 98TransAmWs-6's Avatar
    Join Date
    Apr 2010
    Location
    Fairfax, VA
    Posts
    3,596

    Black/ Silver
    98 TA WS6/ 01 C5 Corvette

    Quote Originally Posted by SMWS6TA View Post
    OP It is well worth doing Headers, ORY, and a good muffler.

    I like the rumble of Magnaflow, others like Flowmasters (IMHO too raspy), I also like SLP's LM1 as well (but these will make you friends with your neighbors and LEO's quickly )
    I never got pulled over for sound with my SLP lm1 and headers. I guess it depends on the cops in your area. The ones here really don't care unless you draw attention to yourself. Headers and full exhaust back are worth every penny.
    1998 Trans Am WS6 - Phantom
    421 CI LQ9, Tick Performance Custom Cam, TFS 255cc LS3 heads, Kooks 2" LT headers, Kooks 3" True Duals w/ high flow cats, FTP 104 lid, Speed Density Tune, 4" silicon tube, LS6 VCT, FAST 102 Intake, NW 102 TB, Oil Catch Can, SLP Bilstein Shocks w/ Vogtland Springs, CTS-V 4-piston Calipers w/C6 Z06 rotors, Stainless Steel Brake Lines, R1 concepts premium rotors, Hawk HP+ brake pads, VFN WSQ Hood, C5-R timing chain, SLP oil pump, E85 tune, Walbro 450 fuel pump, Deatschwerkz 95# injectors, Breathless performance headlights, Frost Tune, !HVAC.
    (Coming Soon) BMR DSL, UMI TQ Arm
    421 LQ9 14.8:1 on E85 Build/

  7. #7
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    One of my car club buddies got pulled over for the exhaust, then got another ticket for tint. Beat the exhaust ticket because he took pics of the muffler on the car but still was stuck with the tint ticket.

  8. #8
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    I'd rather walk quietly and carry a big stick

    On the original question, I didn't find much gain with just long tube headers installed on any of my stock LS1's. To help explain, this was a bone stock car, that already had my custom tune in it. After making dozens of 1/4 mile passes with stock manifolds, I installed long tubes with an off-road-Y, made very slight adjustments to the tune I already had and made a dozen more passes. Considering the slight weather differences I found the car consistently picked up about .1 tenth in ET and roughly 1 mph overall. The dragstrip dyno says that's about a 10HP improvement.

    That doesn't mean headers aren't worth it, they most certainly are. They really shine when other mods come into play like camshafts and cylinder heads. On an otherwise bone stock LS engine however, not as impressive from my experiences.

  9. #9
    We'll be back... GatorSS's Avatar
    Join Date
    Aug 2005
    Location
    THE SWAMP
    Posts
    1,446

    Light Pewter Metallic
    2000 Camaro SS M6

    To get a better answer, one must look at the total area under the curve* gain rather than just peak HP gain. Also, one must compare torque, which might even be a better measurement parameter to consider.

    With your reference to cost in consideration of whether or not it is worth it, you are certainly looking at the most important analysis to consider -- cost vs. benefit. Could you get more gain by spending your $1,000 on something else?

    (* Refers to the dyno graph)

  10. #10
    We'll be back... GatorSS's Avatar
    Join Date
    Aug 2005
    Location
    THE SWAMP
    Posts
    1,446

    Light Pewter Metallic
    2000 Camaro SS M6

    I didn't notice this until now: It's been four months since your original post question. Perhaps I was late with my last post above.

    Did you go ahead with the headers install?

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Install shop or DIY header install?
    By dethinboots in forum External Engine
    Replies: 7
    Last Post: 09-24-2011, 07:35 PM
  2. What to do with EGR on header install?
    By Agent421 in forum General Help
    Replies: 13
    Last Post: 08-04-2010, 04:12 AM
  3. Post LT header install header issues
    By ob02z28 in forum External Engine
    Replies: 20
    Last Post: 02-18-2010, 05:10 PM
  4. Quick header gain question
    By JwMonE99 in forum External Engine
    Replies: 2
    Last Post: 06-03-2008, 07:22 PM
  5. header install
    By KillerTA00 in forum External Engine
    Replies: 5
    Last Post: 06-06-2006, 01:31 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
  •