383 buildup need some opinion!!!

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    Author Topic: 383 buildup need some opinion!!!  (Read 1166 times)

    Offline 1968mopar383

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    383 buildup need some opinion!!!
    « on: September 01, 2007 - 09:00:08 PM »
    hi ....first sorry for my english...im a french speaking!!...ok..im curently building a 1968 383...here is the part list....stock crank.. polish and new bearing...edelbrock camshaft:                                                                        Duration at 0.006" Lift: Intake: 300° Exhaust: 308° 
    Duration at 0.050" Lift: Intake: 238° Exhaust: 246° 
    Lift at Cam: Intake: 0.320" Exhaust: 0.330" 
    Lift at Valve: Intake: 0.480" Exhaust: 0.495"...with matching valves springs....edelbrock double roller timming chain...edelbrock torquer aluminium intake.....edelbrock 750 cfm performer series....full length hedman headers 1 7/8 ..3'' out....906's with little porting....(88 cc)...2400 torque stall..2.76 rear gear soon to be swap for 3.23 sure grip....and my question is......which pistons do i have to buy to have a good compression...like 9 or 9.5 ratio and....is my combo sounds good ??? thanks .....

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    Offline Chryco Psycho

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    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: 383 buildup need some opinion!!!
    « Reply #1 on: September 02, 2007 - 02:28:42 AM »
    Speed Pro makes a forged flat top piston that will get you ion the mid 9 : 1 range depending which thickness head gasket you use , I do not have the part # handy right now
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    Challenger - You`ll wish You Hadn`t

    kudakidd

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    Re: 383 buildup need some opinion!!!
    « Reply #2 on: September 06, 2007 - 07:37:33 PM »
    Your combo sounds fine. You may want to mill the heads a bit to reduce the 88cc volume
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    Offline oldkimmer

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    Re: 383 buildup need some opinion!!!
    « Reply #3 on: September 07, 2007 - 02:05:31 AM »
    Toss that junker cam, go with comp or some other good name brand..........kim.......... :canada:
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    Offline ntstlgl1970

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    Re: 383 buildup need some opinion!!!
    « Reply #4 on: September 08, 2007 - 01:42:56 AM »
    That is a big cam for a 383, I have the same one in my 440 and it likes a 2800 stall and 3.55 or 3.91's. With the 383 you need a higher stall speed than 2800 or it might be pretty sluggish.
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    70 Cuda, 7.0L Gen-III Hemi, Viper T56 w/9310 gearset, 3.91's, Megasquirt MS3x v3.57, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....
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