Hey, long time no talk....couple questions on 383 build

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    Author Topic: Hey, long time no talk....couple questions on 383 build  (Read 2043 times)

    Offline DodgeFreak

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    Hey, long time no talk....couple questions on 383 build
    « on: April 05, 2009 - 02:09:42 PM »
    I aquired a 383 long block with 11-12:1 compression pistons (according to the guy i got it from they are domed just don't know what the com. ratio is for sure)  anyways the guy wanted to keep rockers and cam. i have a hyd. cam  its a crane cam have had it awhile and here are the specs.

    Part Number: 644561 Grind Number: H-302-2 (REPLACES CCH-302-2)
    Engine Identification:     
    Start Yr. End Yr. Make Cyl Description
    1958 1978 PLYMOUTH-DODGE-CHRYSLER 8 ROUGH IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, MILD BRACKET RACING, AUTO TRANS W/3000+ CONVERTER, 3800-4200 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500
    Engine Size Configuration   
    350-440 C.I. V   
     
    Valve Setting: Intake .000 Exhaust .000 HOT
     
    Lift: Intake @Cam 336 @Valve 504 All Lifts are based
    on zero lash and theoretical rocker arm ratios.
      Exhaust @ Cam 352 @Valve 528
    Rocker Arm Ratio 1.5     
     
    Cam Timing: TAPPET @.0044
    Lift:   Opens Closes ADV Duration
      Intake 39 BTDC 83 ABDC 302 °
      Exhaust 88 BBDC 44 ATDC 312 °
     
    Spring Requirements:   Triple   Dual   Outer   Inner
    Part Number 99893
    Loads Closed 130 LBS @ 1.850 or 1 27/32
      Open 318 LBS @ 1.350     
     Recommended RPM range with matching components
    Minimum RPM 2800
    Maximum RPM 6600
    Valve Float 7200
     
    Cam Timing: TAPPET @.050
    Lift:   Opens Closes Max Lift Duration
      Intake 9 BTDC 43 ABDC 107 232 °
      Exhaust 58 BBDC 4 ATDC 117 242 
     
    I'll be getting the heads (i think they are a stock cast heads) that he used so the springs are rated for about a .550 lift cam (there again thats just what he said don't really know the lift on the old cam but he's been building motors and racing for along time and is a friend of my cousins.)  I'm wondering do i need special lenght pushrods or will stock ones work and can i run stock rockers.  i got this motor on trade and was wanting to finish it with out putting alot of money into it.  also what size carb do i need i can't remember the formula to figure it out.  I know i'm leaving alot of unknowns but hoping someone might know.  Thanks
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    74 Plymouth Duster- restoring

    77 Dodge D150 shortbox- as long as i don't change my mind will be a step side dually diesel or a 383 powered truck

    04 durango 4.7


    Offline DodgeFreak

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #1 on: April 05, 2009 - 04:40:57 PM »
    I also have been looking for lifters and noticed on jegs for crane lifters they list for bb and sb chryslers are they the same?? i was thinking about running rhodes lifters in the motor to try it but they don't list for bb just sb.
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    74 Plymouth Duster- restoring

    77 Dodge D150 shortbox- as long as i don't change my mind will be a step side dually diesel or a 383 powered truck

    04 durango 4.7

    Offline dodge freak 2

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #2 on: April 05, 2009 - 04:58:23 PM »
    Everybody knows Crane filed for bankruptcy--right?

    So forget about any warranty from Crane.

    Not sure on your questions, I'm a small guy  :roflsmiley:
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    Offline DodgeFreak

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #3 on: April 05, 2009 - 06:50:01 PM »
    I got this cam probably over 5 years ago with intentions on building a 440 but didn't have the funds..and still really don't...to many projects not enough money for all of them.
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    74 Plymouth Duster- restoring

    77 Dodge D150 shortbox- as long as i don't change my mind will be a step side dually diesel or a 383 powered truck

    04 durango 4.7

    Offline Chryco Psycho

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #4 on: April 06, 2009 - 01:18:38 AM »
    Yes you can put it together with what yuou have the Springs will be in the right range , the stock pushrods will work & should take the load , if they bend you know they are not up to the task & need to be replaced , same with the stock rockers , they will take it for a while  & they are cheap to replace if they fail although I am sure MP would recommend HD Hyd rockers or better yet adjustable rockers
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    Offline DodgeFreak

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #5 on: April 06, 2009 - 01:27:17 AM »
    thanks for the reply...i'll give it a shot and see what happens.
    Logged
    74 Plymouth Duster- restoring

    77 Dodge D150 shortbox- as long as i don't change my mind will be a step side dually diesel or a 383 powered truck

    04 durango 4.7

    Offline moper

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #6 on: April 06, 2009 - 12:12:01 PM »
    Good package but it may feel soft because of the lack of true compression and that cam. I love that cam and have used about 5 of them in various builds. It can run a single spring ad the factory arms, but they will flex with it and the rpm will be limited. I use iron adjustables with them. You should have no issue breaking it in,the lobe is not a fast rate, it just works very, very well for mid range and top end while still making a little vacuum. Those domed pistons, in a block that was not decked heavy, will only make about 9.8:1 with typical open chamber heads.
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    Offline DodgeFreak

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #7 on: April 08, 2009 - 02:26:44 AM »
    what size of a carb should i be lookign at?  and i was looking for lifters and on jegs don't remember which brand listed sm and bb lifters as the same...is this true or is there a difference?  thought about getting rhodes lifters but can only find them listed for small block. 
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    74 Plymouth Duster- restoring

    77 Dodge D150 shortbox- as long as i don't change my mind will be a step side dually diesel or a 383 powered truck

    04 durango 4.7

    Offline Chryco Psycho

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #8 on: April 08, 2009 - 03:07:58 AM »
    I would be looking at either the Proform 750 or the Holley HP street 750 , lifters should be the same for either small or big block
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    Offline DodgeFreak

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    Re: Hey, long time no talk....couple questions on 383 build
    « Reply #9 on: April 09, 2009 - 01:52:52 AM »
    Thanks you da man :bigsmile:
    Logged
    74 Plymouth Duster- restoring

    77 Dodge D150 shortbox- as long as i don't change my mind will be a step side dually diesel or a 383 powered truck

    04 durango 4.7
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