Tech Information

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Aviation Use Disclaimer:

    GEARCOA, dba Morel Products, does not make any product recommended for or to be used in
      ANY engine intended for an airplane or aircraft of any type of sort.
    Our products are not certified by the FAA or any other US Government agency
      for aviation applications.

General Information about Lifters:

    Offset Determination
    Recognizing O/C, L/H and R/H Offsets in Lifters
    Morel Lifter Dimensions - From Roller to Top-of-Ball on Seat
    Oil Flow to Push Rod via the Roller Lifter
    Weight of Lifters and How it Affects RPM
    Lifter to Bore Clearance (Makes the System Work Correctly)
    Where to Use "HLT" Limited Travel Lifters
    Specialized Tools used while installing Lifters
    How to read a Micrometer with Vernier scale
    View PDF: Lifter-to-Bore Clearance Worksheet
    Download: Lifter-to-Bore Clearance Worksheet as MS Excel xlsx-file

Black Mamba and Bushing Lifter Installation:

    Black Mamba Lifters Break-In Procedure (Rev Mar 2023)
    Oct 2016 - New Product Announcement: Black Mamba Lifters
    Description: Black Mamba Lifters w/Tie Bar
    Oil Flow Diagram: Black Mamba Lifters w/Tie Bar
    Description: Keyed Black Mamba Lifters - Chevy SB/BB
    Description: Keyed Black Mamba Lifters - Chevy LS, Ford
    Oil Flow Diagram: Keyed Black Mamba Lifters
    Installing Keyed Black Mamba Lifters into CHE Bushings
    Load bearing comparison: Needle bearings vs Black Mamba Oil Wedge
    View John Callies' Black Mamba Presentation from EP Expo 2023

Morel Mechanical Lifters:

Types of Morel Mechanical Lifters
Adjusting Morel Mechanical Lifters

Morel Hydraulic Lifters:

    Types of Morel Hydraulic Lifters
    Jul 2023 - New Product Announcement - Set 7790 / Each 7789 HLT Lifters
    How a Hydraulic Roller Lifter Works
    Oil Types Affect How a Hydraulic Lifter Operates
    Adjusting Morel Hydraulic Lifters
    Adjusting Morel Hydraulic Limited Travel (HLT) Lifters

Presentations / Videos from Engine Performance Expos:

    View John Callies' Lifetime Achievement Award at EP Expo 2023
    View John Callies' Crankshaft Presentation at EP Expo 2023
    View John Callies' Black Mamba Presentation at EP Expo 2023
    View John Callies' Pontiac Fiero 1984 Indy 500 Pace Car War Story from EP Expo 2021

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