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Thread: 1 5/8 vs 1 3/4 Longtube ????

  1. #1
    SCH Member
    Join Date
    Oct 2002
    Posts
    91

    1 5/8 vs 1 3/4 Longtube ????

    For my Novi blown 306 roughly making 450-500rwhp. What would you guys recommend? 1 5/8 Longtube headers or spend the extra $$$ and go for the 1 3/4 longtube headers.

    THANKS
    1993 Mustang LX 5.0

    Engine:
    1993 Mustang LX 5.0

    306
    Paxton Novi2000 12psi
    Trickflow Track Heat Heads
    Trickflow Street Heat Intake
    Trickflow Stage 2 cam
    Scorpion 1:6 RR
    70mm BBK TB
    80mm Pro-M Shorty
    PowerPipe
    42# Injectors
    BBK 1 3/4 Long tube
    Flowmaster Catback
    Crane HI-6/PS2 Coil
    Every other Bolt on available

    518 RWHP 478 FT-LBS Torque

  2. #2
    SCH Moderator 5150 LX's Avatar
    Join Date
    Dec 2002
    Location
    Abilene, TX
    Posts
    4,098
    Personally I'd run the 1.75" headers, you may also consider the Bassani stepped headers.

    I currently run the BBK 1.75" L/T's and they work for my application..... Got lucky and picked them up brand new with a new Dr. Gas X-pipe for like $350 shipped...
    Quote Originally Posted by Kato Engineering
    you just like the metric system because when you talk about your organs length, a three digit number seems to you longer than a one digit number....
    Dart Block 331 and No Power Adder, currently in pieces...... :weird:

    Used to run 6.90 @ 100.4 mph in the 1/8th

  3. #3
    Senior SCH Member FoMoCo1's Avatar
    Join Date
    Jan 2003
    Location
    Moore, Oklahoma
    Posts
    240
    FWIW, i swapped to 1 3/4 from 1 5/8 and maybe picked up a tenth or 2

    i have basically the same setup as you
    89 GT TFS Heads Systemax Intake
    TFS 2 cam 3:55s Novi 2000 42#ers
    466hp / 409 torque ;)
    10.58 @ 121 mph

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