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EC Pinnacle 3.56" Forged Connecting Rod for 236RX Engine

Part Number: 8290
Online Price: $89.95
EC Billet Connecting for EC Tillotson 236RX Engines
Availability: In Stock.

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Description

EC Pinnacle 3.56" Forged Connecting Rod – For 236RX Engine Builds


Introducing the EC Pinnacle 3.56" Forged Rod, engineered specifically for high-performance 236RX engine kits. This billet aluminum rod is purpose-built to pair with EC’s 72mm forged piston and Wildcat 58mm crankshaft, transforming your Tillotson 225R/RS into a powerful and efficient 236cc stroker engine.


This rod is slightly longer than our 8279 rod and is not compatible with the stock Tillotson 72mm piston—doing so would result in piston pop-up beyond the deck height. As always, deck height must be carefully measured and verified to ensure proper piston-to-head clearance.



Rod Specifications:

Specification

Details

Material

Billet Aluminum

Rod Length

3.56 inches (center-to-center)

Rod Weight

154g (with bolts and bearings)

Large End Journal

1.180" – Honda/Clone Crankpin

Small End Journal

13mm – Fits Tillotson Wrist Pin #138220006

Finish

Black Anodized for corrosion and wear resistance

Rod Bolt Torque

150 in-lbs (use a precision torque wrench)


Installation Instructions:

For best results and to ensure proper clearances, always reference the official installation guide here:
Pinnacle Connecting Rod Installation Guide


Why Choose This Rod?

  • Perfect match for EC 72mm Forged Piston + 58mm Wildcat Crank
  • Designed specifically for 236RX Tillotson-based engines
  • Forged strength with race-proven reliability
  • Lightweight and durable for high-RPM racing applications

FAQ

FAQ – EC Pinnacle 3.56" Forged Connecting Rod


Q1: What engine setup is this rod designed for?

A: This rod is specifically designed for the EC 236RX engine kit, using the EC 72mm forged piston and 58mm Wildcat crankshaft. It is not recommended for use with stock pistons like the Tillotson 72mm piston due to deck height issues.


Q2: Will this rod work with the Tillotson 72mm piston?

A: No. The rod is longer than the standard 8279 rod and will cause piston pop-up if used with the stock Tillotson piston. Always ensure the piston, rod, and crankshaft combination matches your target deck height.


Q3: What is the rod bolt torque specification?

A: The connecting rod bolts should be torqued to 150 in-lbs. Use a precision torque wrench for accurate installation.


Q4: What crank journal and wrist pin sizes does it support?

A:

  • Crankpin (large end): 1.180" (standard Honda/Clone)
  • Wrist pin (small end): 13mm 

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