Very Good engine Assembly tips…..Something I do at This Assembly stage is to Carefully measure & Record crankshaft Only rotation Break-away FtLb Torque & Compare to Carefully installed #1 Piston & Rod Total crankshaft Rotation torque Increase…..Each Additional installed Piston & Rod assembly should Add identical Same FtLb crankshaft Rotation torque Incremental Increase as Each is Assembled if Rings installed Good Without hidden cracks…..
A full number of compression ie 9.0-1 to 10.0-1 only account for +- 3-4% HP/TQ If we adjust the SCR from 9.52-1 to 10.0-1 or +-1.92% In your example 1.66% change.
SCR calculation w/ 64cc head. Cylinders 8 Bore 4.004” Stroke 3.48” Head 64cc Valve relief cc 6.6cc Head Gasket .039” Fire ring 4.100” Deck height .025” (Below) SCR 9.53-1 * I adjusted the fire ring to 4.100” but it could be 4.125” on the Felpro Perma-torq gaskets.
Rebuilding my l31 vortec but putting a carb and intake on with aluminum heads. Block is in good enough shape to stay with stock bore and rotating assembly with a quick dingle ball hone. But im kinda wanting to swap pistons out for some flat tops. Would I be ok without doing a complete rebalance with new pistons? If so ill probably just stick with stock D dish pistons but if it'll be ok without a balance ill change pistons, maybe add 150 shot then
You can never watch enough engine assembly videos, you can always find a tip that will help. Retorqueing before the pan goes on was a good one, thanks.
I'm waiting to watch your entire series on the budget build before I start my rebuild. Great tips I've never seen before. Thank you for taking the time to share!
I’m running this build on my Desk Top Dyno 5 to compare. Closing the intake valve ABDC 34° is creating pretty high cylinder pressure boosting Torque. SCR 9.52-1
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Very Good engine Assembly tips…..Something I do at This Assembly stage is to Carefully measure & Record crankshaft Only rotation Break-away FtLb Torque & Compare to Carefully installed #1 Piston & Rod Total crankshaft Rotation torque Increase…..Each Additional installed Piston & Rod assembly should Add identical Same FtLb crankshaft Rotation torque Incremental Increase as Each is Assembled if Rings installed Good Without hidden cracks…..
Perfect turbo motor with that ring gap
THE BEST EVER SERIES ON BUILDING A SHORT BLOCK!!!!! THANK YOU!!!
A full number of compression ie 9.0-1 to 10.0-1 only account for +- 3-4% HP/TQ
If we adjust the SCR from 9.52-1 to 10.0-1 or +-1.92%
In your example 1.66% change.
Adjusted SCR 10.0-1
ICL 104°
361hp @5000 rpm
461tq @2500 rpm
Average 288hp 397tq
ICL 108°
366hp @5000 rpm
453tq @2500 rpm
Average 291hp 397tq
SCR calculation w/ 64cc head.
Cylinders 8
Bore 4.004”
Stroke 3.48”
Head 64cc
Valve relief cc 6.6cc
Head Gasket .039”
Fire ring 4.100”
Deck height .025” (Below)
SCR 9.53-1
* I adjusted the fire ring to 4.100” but it could be 4.125” on the Felpro Perma-torq gaskets.
Rebuilding my l31 vortec but putting a carb and intake on with aluminum heads. Block is in good enough shape to stay with stock bore and rotating assembly with a quick dingle ball hone. But im kinda wanting to swap pistons out for some flat tops. Would I be ok without doing a complete rebalance with new pistons? If so ill probably just stick with stock D dish pistons but if it'll be ok without a balance ill change pistons, maybe add 150 shot then
You can never watch enough engine assembly videos, you can always find a tip that will help. Retorqueing before the pan goes on was a good one, thanks.
I'm waiting to watch your entire series on the budget build before I start my rebuild. Great tips I've never seen before. Thank you for taking the time to share!
I’m running this build on my Desk Top Dyno 5 to compare.
Closing the intake valve ABDC 34° is creating pretty high cylinder pressure boosting Torque.
SCR 9.52-1
ICL 104°
355hp @5000 rpm
456tq @2500 rpm
Average 284hp 391tq
ICL 108°
360hp @5000 rpm
448tq @2500 rpm
Average 287hp 392tq
Simulation environment:
80 F, 50% humidity and 1000’ altitude
Average: 2000-6000 rpm