Thread: 350 To 383 Step Up,

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Originally Posted by SMOKEDOG7142000

Ive Got A Few Questions.i Had A 350 In My 78 Nova.over The Past 2 Years I Upgraded Everything From And Including The Heads On Up.i Jumped The Gun And Took It To The Strip Before It Was Finished And Ended Up Limping Home.i Was Using The Column Shifter And About 2 Seconds Pulling Hard In Second Gear I Bumped It Into Low:cry: Accidental,and Still Cant Figure Out Exactly What.....anyway,the Tach Jumped Way Past My Shift Point And Even Though I Got Out Of It As Soon As It Happened,the Damage Was Done.i Have Since Installed The B&m Floorshifter And Added That Little Rev Control,both Of Which Should Have Been In Before I Left The Garage.lesson Learned! Im Now Building The 383.i Have Had All The Machine Work Done And I Am Ready To Assemble.using Black Hypers,what Rings Should I Go With And What Gaps? Main And Rod Bearings,what Have You Guys Had Luck With?what Are Acceptable Clearances,better Yet ,what Would You Run Them At For This Engine.is The 83 A Better Drag Engine For My Nova,with The Internal Parts Specs Close To Each Other?and Last,would A Solid Lifter,non Roller,cam Step Up Performance Or Would Hydraulic Set Just As Well? Sorry,didnt Mean To Drag This Out This Long,ive Heard Many Horror Stories About The Rings And Clearance Issues,i Just Wanted The Groups Expert Advice.thanks To All In Advance.......

Number one.Follow the piston makers specs. when it comes to ring end gap.
I think the $40 set of moly rings are fine for what you are doing.
I.M.O.,I would never run a set of hyper pistons in any drag car.
They are fine in a 400 hp street car.
I like the old Michigan 77 bearings.
If this is a "drag only " 383 I would run 2.50 to 2.75 thousands'ths on the steel rods.
I would run 3.0 to 3.25 thousands'ths on the mains.
I would try and run 18-20 thousand'ths rod side to side.
I would try and run a min. of 7 thousand'ths crank thrust.
10-12 if you are running a "brake" or leaving at 5,000 with a manual.
A mechanical roller cam will always make more hp than a hyd. stick.
In my first post I had posted the wrong rod and main clearance.
I had posted them for a pro-street application.Sorry.