NOW AVAILABLE!
Introducing the Austin Healey 100-6 Platinum 1.65:1 Ratio Roller Rocker Set!
Premium Performance Roller Rockers using our very own 3 piece Shaft & Cradle designed & manufactured in house.
Yella Terra Platinum Race Rockers - The ultimate performance rockers for Austin Healey 100-6s!
Designed for strength, built to race. No other rocker system compares with Yella Terra Platinum race series. Manufactured and assembled in Australia using the highest quality materials and componentry sourced locally and from the USA.
Our wide range of true ratios allows you to achieve high lift without relying solely on your camshaft… a trend many engine builders and racers alike are adopting to relieve the inertia on lifters and push rods generated by aggressive and often violent ramp rates required to make big lift.
Equipped with smooth low friction rollers allowing for high revving capability perfect for any street, strip, circuit or hill climbing application. Precision CNC anodised cradle provide unsurpassed rocker stability eliminating premature valve train wear and radically reducing side loading.
Higher ratio rockers produce more lift out of a given cam profile. In addition, lift the the valve off the seat at a much more rapid rate when compared with stock ratio rockers, producing increased and sustained airflow. Reliable at high RPM with huge needle roller bearings. Your engine will run cooler, smoother and quieter.
100% Australian manufactured and designed, the ultimate go-fast-bit for the legendary Big Healey!
Key Features:
- The YT 6773 Rockers are an Easy Fit Bolt on. However, due to the higher ratio, some linishing of the cylinder head may be required for Push rod clearance
- New CNC Machined RIDGEBACK rocker body for added strength in Hi-RPM Applications 1.65 Ratio
- Tool steel Pin & Roller
- Torrington BEARINGS
- Chrome Moly Cup lash adjustment screws with Blackened 12 Point Nuts - To suit Ball end Pushrods
- Channel pressurised oil from shaft to the pushrod cup to the shaft bearings and then on to the roller tip.
- 3/8” Adjuster screw and heat-treated alloy steel jam nut to positively secure lash settings.
- Each adjuster is broached for a big 3/16" socket to eliminate twisted hex keys.
- Larger diameter shafts are made from 4130 steel, deep case hardened and tempered for maximum wear resistance and strength.
- Aluminum rocker bodies use new 2000 aluminum made to our specifications for improved tensile and yield strength, and increased notch sensitivity, fatigue resistance, strength at elevated temperatures and chemical resistance.
Kit contains:
- 12 all new 1.65 Ratio RIDGEBACK arms Fully assembled with X Hole HD Lash adjusters & 12 Point Nuts, Torrington Bearings, and specifically ground Roller Tips
- 3 Specifically designed and ground shafts with Oil galleries machined for perfect lubrication
- 3 CNC Machined Anodized Shaft Cradles incorporating pressurised Oil Galleries for lubrication
- 12 Blackened Lock Nuts & Stainless Washers to secure the Cradles to the Factory Studs.
- Brass Oiling System & Anodized Plugs - Additional Oil Piping can be installed using the 2 Additional Holes in the left & Right Cradles
- Blackened Spacers & Washers to complete the assembly
- Assembled and ready for pre-lubrication and installation.
FITMENT NOTES:
- Requires Original Rocker Studs / Rocker Mounting Bolts - Not included with Kit
- Will not fit under standard Rocker Cover - Requires a Taller cover
- HI-RATIO Rockers will require clearance on factory heads where the pushrod comes close to the Pushrod Holes in the Cylinder Head
Tech Spec - Total system includes cradles, shafts, arms & Lock nuts
| PART NO | YT 6773 |
| BRAND | |
| APPLICATION | RACE/STRIP |
| MAX OPEN SPRING PRESSURE |
|
| MAKE | AUSTIN HEALEY |
| ENGINE | HEALEY 100-6 C-Series 3000 |
| MOUNTING STYLE | MODULAR SHAFT |
| ROCKER ARM RATIO | 1.65 |
| STUD SIZE | N/A |
| ADJUSTABLE/HYDRAULIC | ADJUSTABLE |
| ROCKER ARM STYLE | FULL ROLLER |
| ROCKER MATERIAL | ALUMINIUM |
| ROCKER ARM BODY STYLE | RIDGEBACK / PLATINUM |
| ROCKER ARM NUT STYLE | CAPSCREW |
| MAX SPRING DIAMETER | 1.550" |
| OFFSET | N/A |
| QTY | SET OF 12 |
| NOTE |
YT 6773 Rockers WILL NOT FIT the original Shafts The YT 6773 kit includes Shafts designed and manufactured in house far exceeding the capabilities of the original BMC HEALEY design. Requires 5/16" Ball end Pushrods HI-RATIO Rockers will require clearance on factory heads where the pushrod comes close to the Pushrod Hole in the Cylinder Head |
