400 at the track today

Discussion in 'Street/strip 400/430/455' started by Jeremy Zepnick, Apr 23, 2022.

  1. hugger

    hugger Well-Known Member

    First pass is almost always my best haha,...I've often said I should only run once then put it up because it's not gonna get better ha
     
  2. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    Went three rounds today. Last round cut a .001 green and made the rookie mistake of not running it out all the way. Gave the round away at the finish line. Oh well. Had fun today. Driving the 400 tomorrow for the 462 engine swap. Hoping engine will be running and complete by June 11th (next race date)
     
  3. BQUICK

    BQUICK Gold Level Contributor

    Nice light!!! (.001) You likely won't see another one of those for a while!

    I have a full weight 72 Skylark with 3.90 gears and stock 70 455 (not rebuilt), small valve heads but ported, SP2 cam, headers, Performer, Q-jet, 2500 conv, T350. Has gone 12.20s with the 3.90 gears and 12.60s with 2.56 gears.

    And years ago same motor with 3800 converter, 850 TQ and electric water pump and no PS. 11.80s with a best of 11.66.

    Just some inspiration....
     
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  4. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    Previous round .064 light.
    Some guy(fathers friend Rondo) donated a TCI 3000 torque converter for my car.
    Thatl go in with engine swap.
     
  5. Dano

    Dano Platinum Level Contributor

    My old '69 Sportwagon 400 with a just a stock rebuild & headers went 14.30's back in the 80's. I was kinda surprised it was that quick. Good weight transfer.
     
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  6. PGSS

    PGSS Gold Level Contributor

    I have seen a old road test article for the 69 GS 400 with the Stage1 package.
    14.40 with alot of tire spin. The stock 400 was in the 14.70 range. All with stock tires.
    Your 14.58 is great:cool:
     
  7. Stevem

    Stevem Well-Known Member

    If you do not have them yet then a set of Hop Stop bars should go in first.
     
  8. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    I had a better pass of 14.46 recently. No tire spin at all. Hooks good with a 4-5 sec burnout. Leaving at 1000 RPM
     
    Last edited: May 22, 2022
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  9. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    I'll have to do some research then.
     
  10. Thumper (aka greatscat)

    Thumper (aka greatscat) Well-Known Member

    Yep. off the show room "Blue" went 14.7 on stock tires, 4speed. 3.64 gears,before the stage2 install. Then a 13.10 was best I could muster on stock tires, slicks put her 12.5 with a best of 12.38, launching with a stick and slicks was a craft,bog or spin, it was a fine line.
     
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  11. cjeboyle

    cjeboyle Gold Level Contributor

    Is there a thread on your engine build? Will it have aluminum heads?
    Cliff
     
  12. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

  13. hugger

    hugger Well-Known Member

    Those things belong on the ark where the come from haha,...stock suspension is all that's needed till you get into the low 11s,...
     
  14. PGSS

    PGSS Gold Level Contributor

    Nice!
    Was the Stage2 package really that unstreetable? Had to be at least 100 hp difference?
    I'm guessing no exhaust..
     
  15. BQUICK

    BQUICK Gold Level Contributor

    Tracks these days are alot better. I had to use all kinds of traction aids in the 80s/early 90s. Southside bars, air bags, even 2 big wheels/tires in the trunk, etc. Always looking for something. One of the reason you still see tubbed cars out there....not really necessary now IMO. Tracks and tires have come a long way.
    The smallblock chevy guys had an easier time of it. I would spin 1 out of 3 passes. Hard to be competitive.
     
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  16. standup 69

    standup 69 standup69

    Way back my 69 400 ran 14.43 @97 mph stock except 1 7/8 headers on 245 bfg radials ..swapped on a set of Hoosier dirt bozz tires went 14.23 but lost 3 mph ..I think your pass was a good strong Showing of a GS 400
     
  17. PGSS

    PGSS Gold Level Contributor

    Not sure if I read it here or again from a article from back in the days.
    The stock 2.93 geared 400 would be 4 car lengths behind the 400 with the Stage1 option at the end of the 1/4.
    How much is gears or how much is the hotter cam?

    This isn't my real world experience LOL:eek: just what I have read..
     
    Last edited: May 22, 2022
  18. Waterboy

    Waterboy Mullet Mafia since 6/20

    I have a 68 GS 400 convertible. I put the hooker headers on it that actually came through the frame and back around, along with a B4B aluminum intake, and a BIG Holley carb. It did 14.99 at almost 100 mph with a hellacious one tire fire. Oh, the good old days! I don’t beat on that car anymore because the engine is original, and never been rebuilt.
     
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  19. Jeremy Zepnick

    Jeremy Zepnick STEELMAN

    Yea I'm keeping the 400 motor for resale (down the road) if I decide to sell the car for some reason
     
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  20. PGSS

    PGSS Gold Level Contributor

    100 mph at the end of the 1/4 with one tire spinning, thats a strong motor!
     

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