April 2022 Propwash Web

Proposal #1 Modifications to NAMBA rule B.1 ‐ G Class Rules in Section 27 ‐ Gas Reasoning: Allow thread repairs to be added and clarification of induction systems allowed.    Proposed changes:  B. CLASS SPECIFICATIONS  1. G Class Rules  a. General Engine Specifications  iii) ORIGINAL: Modifications are allowed to major and minor components.   However, major components  may only be modified by removing material. Adding material or parts to modify an engine's major  components will be illegal. The only exception to this rule is that a cylinder may be modified to accept  (add‐on) a water jacket.                                                                                                                                    MODIFY TO: Modifications are allowed to major and minor components. However, major components  may only be modified by removing material. Adding material or parts to modify an engine's major  components will be illegal, the only exceptions to this rule are:   (a) a cylinder may be modified to accept (add‐on) a water jacket  (b) a wire thread repair insert (i.e., HeliCoil) may be used to repair stripped thread, but must retain  factory thread diameter, pitch, and length.  iv) ORIGINAL:  Induction systems must be piston‐ported. Modifications incorporating induction systems  other than piston‐ported systems are illegal. Engines must be naturally aspirated.  Tuned exhaust and  intake systems are the only allowed method of altering cylinder pressures.  MODIFY TO:  Induction systems must be piston‐ported. Modifications incorporating induction systems  other than piston‐ported systems are illegal. Engines must be naturally aspirated.    _________________________________________________________________________________________________  Proposal #2   Modifications to NAMBA rule B.3 ‐ G‐Limited Class Rules in Section 27 ‐ Gas   Reasoning: Minor addition of items that are being done today that do not provide any performance advantage.  Proposed Changes:  B. CLASS SPECIFICATIONS  3. G‐Limited Class Rules  a. General Engine Specifications  vii) ORIGINAL:  Zenoah EZ Starter Kit (part #GR26099) will be allowed. The pulley assembly (part #848‐ ESZ‐7520) of the pull starter may be modified for the purpose of not using the spacers (part #848‐8Y4‐ 6100) or the space plate (part #580‐44‐79‐01).                                                                                        MODIFY TO:  Zenoah EZ Starter Kit (part #GR26099) will be allowed. The pulley assembly (part #848‐ ESZ‐7520) of the pull starter may be modified by facing the standoff length for the purpose of not  using the spacers (part #848‐8Y4‐6100) or the space plate (part #580‐44‐79‐01).           xiii) ADD: Thread sealant or thread locker may be used on any engine bolts.  xiv) ORIGINAL: The ignition coil (gray, part # 2629‐71311) may be relocated using any type of bracket, but  no shortening of the plug wire.                                                                                                                    MODIFY TO: The ignition coil (gray, part # 2629‐71311) may be relocated using any type of bracket,  but no shortening of the plug wire and no ground straps allowed.   xv) ADD: The primary coil (red, part# 1160‐71211) may have the black wire removed.  xvi) ADD: Engraving on the outside of the cylinder is allowed for identification purposes only.  Proposal #3