Page 1 of 2 12 LastLast
Results 1 to 10 of 18

Thread: Engine combination input

  1. #1

    Engine combination input

    Hello, new here but i ve been reading and watching for a few months now. I am building a 383 Stroker for an 81 Z28 drag car and just curious as to what you guys thought about this engine combination. I am new to the engine building scene so a good friend of mine thats built a few engine in his time put this combo together so I was looking for any input, good or bad, on what you guys think.

    Engine Combo

    Eagle Forged Crank 3.750
    Eagle Forged H-Beam Rods
    SRP Forged -7.00 cc Dome Pistons
    RHS 200 cc Pro Action Aluminum Heads -
    Camshaft, Mechanical Flat Tappet, Advertised Duration 306/306, Lift .555/.555
    Rocker Arms, Ultra Gold, Stud Mount, Aluminum, 1.5 Ratio, 3/8 in. Stud
    Intake Manifold, Victor Jr., Single Plane, Aluminum, Natural, Square Bore
    Carburetor, Gasoline, 4150, 750 cfm, 4-Barrel, Down-Leg, Billet Metering Blocks, Dual Inlet

    Let me know what you guys think about this combonation.

    Thanks,
    Jeremy

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    Location
    Belleville, IL
    Posts
    658
    http://www.4secondsflat.com/Calculator_for_CID.html

    I thought 383s were 3.8" stroke with a 4" bore???

    You sure you're not building a 377???

    Is this drag only, or street/strip? If it's drag only, assuming the head flow info from RHS is correct, I think the cam is to small and compression is too low (estimating 10.5:1 with 64cc head and .050 gasket).

    http://www.racingheadservice.com/Inf...-SBC-200cc.gif
    -WJ Birmingham

    OneBadGMC.com

  3. #3
    Senior Member RACING JUNKIE DirkaDirka's Avatar
    Join Date
    Jul 2009
    Location
    Clarksville, TN
    Posts
    1,954
    Jeremy,

    Welcome to the forum. I am also new to the scene. The guys here are great and to me they are family already.
    Its all fun and games till someone loses a nut!

    http://www.racingjunk.com/profile/400466

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    Dec 2008
    Location
    Sugar Hill, GA
    Posts
    1,365
    That combination sounds more like a hot, manual transmission street car engine.
    JMO Dave
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triump of evil is for good men to do nothing" Edmund Burke

  5. #5
    Quote Originally Posted by OneBadGMC
    http://www.4secondsflat.com/Calculator_for_CID.html

    I thought 383s were 3.8" stroke with a 4" bore???

    You sure you're not building a 377???

    Is this drag only, or street/strip? If it's drag only, assuming the head flow info from RHS is correct, I think the cam is to small and compression is too low (estimating 10.5:1 with 64cc head and .050 gasket).

    http://www.racingheadservice.com/Inf...-SBC-200cc.gif
    I bought the rotating assembly from Summit. Its a World Products Kit that the dont sell anymore. The bore of the block is 4.030 with a 3.750 stroke.

    The motor is gonna be just for drag racing. Its my first drag car and it will be an automatic car.

    I will check out those website and see what I can come up with, my buddy thought it would be a good combnation and get the car in the 11.65 range. I dont know but keep the ole comment coming because as of right now I only have the short block assembled so I can change thing before its to late.

    Jeremy

  6. #6
    I just visited the CID calculator and I came up with a 383 and 12.0497:1 Compression

  7. #7
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    Location
    Belleville, IL
    Posts
    658
    Well, you're going to be limited by piston to valve clearance if the short block is together and the reciprocating assy is balanced.

    How much piston to valve clearance do you have now with the cam that's in it?

    My error on the compression, I used -7 instead of +7.

    What rear gear is in the car? What trans? Bought a stall converter yet?
    -WJ Birmingham

    OneBadGMC.com

  8. #8
    Senior Member RACING JUNKIE
    Join Date
    Nov 2004
    Location
    St. Louis, Missouri
    Posts
    664
    I assume your using a 400 cid block.....
    bore is 0.030 over

    What cc are the head chambers, 64, 67, 72????

    Rod length; is it 5.700 or 6.000
    What is your block decked at 9.000 or ???

    How much wrist pin is in the lower ring grove?

    Curious
    "Can't Means You Don't Want To"

    Haven't You Stomped A Ford,,,,,,,,,,,, Lately?

  9. #9
    Senior Member EXPERT BUILDER
    Join Date
    Jan 2005
    Posts
    336
    he states the crank size and bore size.well sounds like a 383...


    id contact udharold or camking here on racing junk for a cam if not then use lunati voodoo line cam.if not lastly id use the comp extreme line cam.

    goodluck

  10. #10
    your combo sounds just like my motor, mine is a 383 with srp 13 to 1 30 over 350 with 3.750 eagle crank and 6" eagle h-beam rods and 235cc pro action iron heads with the holley 750 hp carb powerglide and 4.71 gears and i'm running 10.70-80's. my cam is 630-630 solid roller and same intake.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Email us - Support@RacingJunk.com
Call us - 866.326.9227
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy