1. Welcome to For E Bodies Only !

    We are a community of Plymouth Cuda and Dodge Challenger owners. Join now! Its Free!

    Dismiss Notice

is a high 11 sec 1/4 mile possible

Racers Forum

  1. youngunss1987

    youngunss1987 Well-Known Member

    Messages:
    48
    Likes Received:
    1
    Joined:
    May 5, 2012
    I just moved to san diego and looking to go to the track soon but i have made some upgrades hoping to get in the high 11s but low 12s would be ok ..
    my 74 challenger is 3400 lbs with me in it i have a 340 with edelbrock heads 63cc 9.5 compression forged eagle crank a deep ported air gap intake from hughes along with a their cam [TABLE]
    [TR]
    [TD="class: smallBlackLabel"]Intake Valve Lift 1.5
    Exhaust Valve Lift 1.5[/TD]
    [TD="class: smallBlackText, align: right"].512"
    .518"[/TD]
    [/TR]
    [/TABLE]
    [TABLE]
    [TR]
    [TD="class: smallBlackLabel"]Intake Duration at .050"
    Exhaust Duration at .050"[/TD]
    [TD="class: smallBlackText, align: right"]223°
    236°[/TD]
    [/TR]
    [TR]
    [TD="colspan: 2"][​IMG][/TD]
    [/TR]
    [TR]
    [TD="class: smallBlackLabel"]Lobe Separation Angle[/TD]
    [TD="class: smallBlackText, align: right"]107º[/TD]
    [/TR]
    [TR]
    [TD][​IMG]Intake Centerline[/TD]
    [TD] 102º[/TD]
    [/TR]
    [TR]
    [TD="class: smallBlackLabel"]Intake Opening at .050"
    Exhaust Opening at .050"[/TD]
    [TD="class: smallBlackText, align: right"]9.5° BTC
    50° BBC[/TD]
    [/TR]
    [TR]
    [TD="colspan: 2"][​IMG][/TD]
    [/TR]
    [TR]
    [TD="class: smallBlackLabel"]Intake Closing at .050"
    Exhaust Closing at .050"[/TD]
    [TD="class: smallBlackText, align: right"]33.5° ABC
    6° ATC[/TD]
    [/TR]
    [/TABLE]
    i am also running a 4 hole 1 HVH inch spacer with a 750 proform dobble pumper and electric fan aluminum drives shaft , pinion subber with gas shocks in the rear , i am also running 3.91 posi with a rebuilt 904 trans shift kit 2500 rpm stall for ignition i running a accel disturber with a revnator ignition box what should i put my rev limiter at ? i have a 26 inch bfg tire on it right now with 15 inch aluminium rims what would be the best tire for traction ? do i need more gear then the 3.91 ?
     
  2. mmissile

    mmissile Well-Known Member

    Messages:
    864
    Likes Received:
    143
    Joined:
    Dec 26, 2013
    Location:
    Macomb County Michigan
    I'd say you're a bit light in most categories. Just an opinion.
     
  3. moparleo

    moparleo Well-Known Member

    Messages:
    4,608
    Likes Received:
    441
    Joined:
    Oct 17, 2011
    Location:
    So. Cal. Riverside area Moreno Valley
    It depends on your altitude when they release it.
    http://wahiduddin.net/calc/calc_speed_rpm.htm
     
  4. mmissile

    mmissile Well-Known Member

    Messages:
    864
    Likes Received:
    143
    Joined:
    Dec 26, 2013
    Location:
    Macomb County Michigan
    Calculations rarely come close to actual conditions and reality.
     
  5. dragondan64

    dragondan64 Banned

    Messages:
    5
    Likes Received:
    0
    Joined:
    Sep 25, 2014
    That combo and weight sounds like a mid to low 13 second sea level car depending on traction and height of tire could even be high 13s@ 95-100mph guestimate keep us posted, and for your question on traction use drag radials or short slicks, I use M & H racemaster street tires and just dry burn them to clean them off and run low 11's so they hook great and should hold your car to the track too, tried BF Goodrich drag radials and on my setup I lost 6 tenths et they didn't hook good at launch,
     
  6. youngunss1987

    youngunss1987 Well-Known Member

    Messages:
    48
    Likes Received:
    1
    Joined:
    May 5, 2012
    were did you get your M&H tires ? the car ran 12.60-12.70s with BF Goodrich tires on it
     
    Last edited: Oct 6, 2014
  7. youngunss1987

    youngunss1987 Well-Known Member

    Messages:
    48
    Likes Received:
    1
    Joined:
    May 5, 2012
    hughes does offer a fully ported Air gap intake... i was thinking about that ... i just got the port matched one when i bought it
     
  8. youngunss1987

    youngunss1987 Well-Known Member

    Messages:
    48
    Likes Received:
    1
    Joined:
    May 5, 2012
    Test Super Prep Int cfm Super Prep Exh cfm
    .100" 71.6
    .200" 138.5 92.9
    .300" 192.6 137.6
    .350" 215.7 153.9
    .400" 235.8 168.5
    .450" 253.5 175.2
    .500" 254.9 176.3
    .550" 257.9 176.3
    .600" 259.0 176.3
    .650" 252.6 176.3
    what my heads are flowing that i bought from hughes elivation of the track would be 600ft above sea
     
    Last edited: Oct 6, 2014
  9. hot metal

    hot metal Member

    Messages:
    10
    Likes Received:
    2
    Joined:
    Jan 10, 2017
    Location:
    England
    Hi, to run low 12's@110-3400lbs you will need that motor to make around 380hp with a good hooking car and 60's in the 1.65's. I doubt if 380 is on the cards with those motor specs, heads are good but the cam is a tad mild. I would say 340 with those Eddies at a guess (perhaps more?) which could put you in the mid 12's@107. 3.91's and a 2500 stall is weak for the track, I would use a 10x28 tyre and 4.30's with at least a 3000stall, I would say 3500, that would improve your 60's/ET and have you trapping the 1/4 @ around 6000rpm w/slip where your power should be.....my 2C's.
     
    Last edited: Sep 25, 2017
  10. Cudafever

    Cudafever Well-Known Member

    Messages:
    129
    Likes Received:
    8
    Joined:
    Dec 23, 2010
    I say your weak link is tires and converters. 340 make good power but not at low end (rpm) and in a e- body makes it even harder.
    I would say 3500 minimal stall, some good Drag Radial(real slick would be better) and you might get there.

    run what you built, tinker and tune it. Then step up to the above suggest.

    A 10 sec car with a stock distributor, 2500 stall and street tires will never be close to its 10 sec potential.

    tune up what you have and go from there.
     
  11. TonyS451

    TonyS451 Member

    Messages:
    8
    Likes Received:
    3
    Joined:
    Oct 19, 2018
    Looks like the initial question was asked some time ago, but my take on this is that 11's won't happen with this combo. The gear ratio is fine, converter should be more like 3500, and it needs sticky tires like slicks or Mickey Thompson drag radials. Even with those changes, honestly I think the cam is too small to make the power needed to run into the 11's, but you never know...Otherwise the combo is great as is for a quick street car.
     
  12. bfunk

    bfunk New Member

    Messages:
    2
    Likes Received:
    0
    Joined:
    Jun 13, 2015
    My 408 ran12.05 with LAX heads and hughes 228/232 hydraulic cam. 750 Holley, RPM intake. I estimated it at 400 hp. I'm thinking you should run mid to high 12s. 900ft altitude here.