Guess my ET....

Mopar Racers Forum

  1. B3422w5

    B3422w5 Well-Known Member

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    OK.... just formulated an offseason plan.
    Race season is over for me
    Here is what i have now...
    Bone stock 360 shortblock
    Stock rods, crank, replacement cast factory spec pistons(+30)
    Howards mech flat tappet cam( 260/264 565/ 565... on a 106, in at 102
    Dougs headers(d453)
    Eddie heads, modest port work, would guess maybe 270-275 max flow... 58cc
    Airgap
    950 hp
    4.30 gear
    28 drag radial
    904
    5k flash vert
    3300 ish with driver
    Typical ET’s... 11.30’s in good spring/ fall air, 11.50/11.55 dead of summer air.

    New combo
    418 shortblock+40 340 block, 4 inch forged Scat crank, Scat rods, Forged flattop pistons( Icon) that are somewhere 5-7 above deck( have to check again). Likely use( after verifying clearance) a 45 cometic gasket. Somewhere 12.5/ 12.7 compression i am thinking
    Gasket matched Weiand excellerator
    Same carb
    Same cam
    Same heads
    Same gear, tire, vert

    any guesses on ET... good air/ summer air?
     
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    • ChuckDock

      ChuckDock FABO Gold Member FABO Gold Member

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      I don't see how your combo could possibly make 950 horse, unless you forgot to mention nitrous/blower/something.
       
    • Professor Fate

      Professor Fate Push the button, Max...

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      I think he meant the carb was a 950.
       
    • B3422w5

      B3422w5 Well-Known Member

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      950 Hp carb( Holley)... lol..i dont see how it could either
       
    • ChuckDock

      ChuckDock FABO Gold Member FABO Gold Member

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      Ah....that would make more sense.
       
    • aaronk785

      aaronk785 Well-Known Member

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      11.00
       
    • doug 371

      doug 371 Well-Known Member

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      10.91
       
    • Craig Burriss

      Craig Burriss Well-Known Member

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      10.73 at 130
       
    • B3422w5

      B3422w5 Well-Known Member

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      Its been a best of 11.26 before. That was with a 727. I swapped in a 904 hoping to see an improvement on the slip, but best ever is 11.33 with the 904.
      Obviously i missed on the convertor.
      I am hoping to see about 5 tenths. Figure the cubes and compression are good for 3-4 tenths.
      Figure this new deal will like a 260@ 50 cam much better than a 9.5-10 to 1 360 did. And i hope the new motor will be more suited to the convertor. We will see. Hoping for 10.75 ish.
       
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      • Toluene56

        Toluene56 Well-Known Member

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        I would say... in good air.. sea level. 10.40's@126-129

        mine is pretty close to that, although cam is a little different. I'm still tuning and it's running 11.2's @7000ft da (so far), which would easily put mine in the 10.7ish range at sea level. Either way, sounds like a certified ripper.
         
      • 318willrun

        318willrun Utube channel 318willrun

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        10.55
         
      • B3422w5

        B3422w5 Well-Known Member

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        I would love you guys to be right.
        But the car is 3300 ish with me, and the heads are FAR from max effort
        Thing is gonna weeze like a 3 pack a day 90 year old at probably the 1000 foot mark drinking air through a straw.
         
      • 33IMP

        33IMP Well-Known Member

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        Easy fix. Run eighth mile, lol. 6.95, at 100.
         
      • fishmens67

        fishmens67 Well-Known Member

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        low 11 high 10
         
      • pittsburghracer

        pittsburghracer FABO Gold Member FABO Gold Member

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        .40 quicker in summer air. (11.10)
        .40 quicker in good air. (10.90)
         
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        • Oldmanmopar

          Oldmanmopar Going left turning right FABO Gold Member

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          12.20
           
        • justinp61

          justinp61 Well-Known Member

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          Don, your new build is similar to my old 408, 260/264° at .050, 106° in at 102°, .626/.633" with 1.6 rockers, 10.8-1, Curtis Boggs ported Edelbrocks, 727, 9.5" converter that flashed 5400, Victor with a Bigs 950HP, Hedman Husler 1 7/8" 3 1/2" headers, 4.10 S-60, 28" drag radials, Cal-Tracs and mono's.

          It ran 6.57 @ 104 with 1.38-1.40 60' at 3260# on pump 93. I shifted at 6400 as it slowed down with anything over 6600 or less than 6400, it was running out of cylinder head. Dave Hughes said it would've been faster with a smaller cam, take that with a dump truck load of salt.

          IMHO, you are going to run out of head sooner than I did. As you know I'm don't have much experience with 1/4 mile racing, but feel with your gear and heads it'll lay down on the big end. Your car works well so my guess is 6.70'-.80's, possibly .60's on very good conditions.

          This and $1.75 will buy you a cup of coffee in some places. :thumbsup:
           
        • flyfish

          flyfish C8H18+N2O = :-D

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          Looks very similar to my current motor as well, except you have a 904 (I have a 727) and my Eddy's flow 293 @ 0.600, and my cam is a step bigger (264-268 @0.05 with ~0.630 lift IIRC). The only thing I would do differently would be put a Victor on it.....With that said, it would not surprise me to see it in the 10.4-10.6 range (really depends on what the heads flow). We will have to see come spring time.

          Edit: just re-read...I thought you were going to use an Air-gap, that is why I said switch to a victor...carry on.:D
           
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