Bored.030, 400 Crank, 6" Rods...Cubes???
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Supreme Member
Joined: Oct 2001
Posts: 3,155
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From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
Bored.030, 400 Crank, 6" Rods...Cubes???
my shortblock is a standard 350 block bored .030 with a 400 crank and 6" rods instead of the 5.7's. what will my exact cubes be? i know id be running about 388 with 5.7's but what about with 6's?
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
oops, i guess thats common knowledge.....well sorry for the dumb question but wouldnt the over bore give a few extra cubes?? and the longer rods should provide more torque correct? 
Supreme Member
Joined: Jan 2002
Posts: 3,852
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Yes the .03" over bore gives you 383 CID instead of 377 with a standard 4.0" bore. The effects of a longer rod are arguable at best, it doesn't really do anything other then reduce rod angularity and bore wear.
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
:hail: :hail: :hail: you are awesome. btw i saw your sig what kind of power do you expect to see from the new engine?
Supreme Member
Joined: Jan 2002
Posts: 3,852
Likes: 1
From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
I'm hoping for a true 400hp at the crank. DD2000 says 480hp.
Last edited by ME Leigh; Jul 24, 2004 at 12:22 PM.
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Joined: Jul 2003
Posts: 4,803
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From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
Gotta love the Desktop Dyno predictions. Maybe thats how the r!cers get so much horsepower.
Another thing rod length does is create more clearance between the piston skirt and the crankshaft counterweights.
Another thing rod length does is create more clearance between the piston skirt and the crankshaft counterweights.
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Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
well "my" desktop dyno with afr 190's and a crane 284/292 cam gave me 541 hp and 507 tq flywheel...........well see if i actually get there
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