Updating 83 chev lg4
Updating 83 chev lg4 - dating an army man
These pistons yielded a 10.26:1 compression ratio, used with a 0.038-inch-thick head gasket, 0.010 piston (down) deck, and a 60 cc combustion chamber.
But to keep costs down while retaining the floating pin feature that allows the homebuilder to assemble the rods onto the pistons himself, Lunati runs the floating pins "steel-on-steel," with no bushing.
If that worries you, remember that Chevy did the same thing on the '69 Z28 302's and warranteed them for 50,000 miles.
The key is maintaining 0.0003 to 0.0005 inch of pin-to-rod clearance, not to mention drilling the rod for pin oiling.
Another depature when using the Silv-O-Lite pistons is piston ring end-gap.
Using traditional hop-up techniques, Lunati's goal was to achieve maximum performance at an affordable price from the 305 small-block in a non-emission-controlled environment.
The engine should be capable of running on the street, with decent idle characteristics and low-end torque.
For longevity and practicality, the engine ought to develop peak power at around 5500-6000 rpm.finally, the package needs to be reasonably priced because the high-buckers would just as soon spring for the larger displacement small-blocks.All 305 blocks have two-bolt main caps and use cast cranks. Both crank and rods are supported by Michigan77 bearings, and are kept oiled by a Melling standard M55 oil pump.The Lunati 305 rotating assembly consists of a standard 3.48-inch stroke cast crank turned 0.010- or 0.020-inch under, indexed and balanced. Silv-O-Lite Keith Black Signature Series pistons (PN 144) were chosen.Manufactured from high-silicon alloys, they combine light weight with superior detonation resistance and (compared to forged pistons) permit tighter wall clearances for improved oil control and quieter operation.On under-4.100-inch bore engines, Silv-O-Lite piston skirt clearances can be set as tight as 0.0015 to 0.0020 inch; yet their rigid skirt design and high-silicon alloy permits running the piston "looser" than a traditional casting if desired--as high as 0.0045 inch.