Subscribe to Precision Engine
Sign up for our E-newsletter
A close-up of our bobweight card.
Gressman centered each bobweight using an aluminum spacer. This ensures that each bobweight will be located in the exact center of each rod pin.
Gressman spun our crank on his pro-ball balancer.
Our Lunati crank is a high-quality, forged, non-twist steel unit featuring a 4.000″ stroke.
As you would expect, the crank stroke is clearly stamped into the front counterweight for easy identification.
When planning to use electronic fuel injection, the crank requires a crank-timing reluctor wheel. This installs to the rear of the rear counterweight.
The reluctor wheel will be heated and placed onto the crank, while locating the wheel for proper phase. We’ll show this in the next issue, using a specialized reluctor wheel installation tool from Goodson.
The Lunati crank fillets were beautifully radiused and superbly polished.
The oil holes were already chamfered, with no sharp edges at all, straight out of the box.
Each Lunati H-beam connecting rod’s box was factory-marked for small-end and big-end weight. This is a nice touch.
The Lunati rods feature a 6.125″ center-to-center length.
The H-beam design offers added strength and the shot-peened surfaces provide added protection against stress risers.
Each rod features a bronze full-float bushing and oil holes on both sides.
ARP 8740 7/16″ x 1.600″ rod bolts were included with the Lunati rods.
No wasted material here. The Lunati rods are works of art, with beautifully sculpted lines.
This shot wasn’t really necessary, but it was just too pretty to ignore.
Our pistons are JE’s new FSR (forged side relief) forged slugs that are fully CNC-machined. Features include flat top domes with 15-degree pockets and a compression height of 1.115″.
Tags: BALANCING, CONNECTING RODS, CRANKSHAFT, GRESSMAN, JE PISTONS, LS, LS2, LUNATI, RELUCTOR RING
