Points/Stats Schedules







Competition
National Events
Regional/Division Events
Heritage Series
Member Track Directory
Division Offices
SRAC Advisor
Competition Number/License Applications & Forms
NHRA Approved ASO's
Insurance Claim Information
Tech
Automatic Horsepower Factoring System
AHFS Request
Engine Blueprint Specifications
Indexes and Records
NHRA Accepted Products
Rules
Stock Car Classification
Tech Support Contacts
Chassis Inspector
Contingency
Contingency Award Rules & Policies
Sponsor Listing & Contact Information
Contingency Sponsor Requirements
LODRS Div Contingency Sheet
Camping World Series Event Contingency Posting
Contingency Sponsor Approved Decals
W9 Form

NHRA Technical Department Makes Parity Adjustment to the SAMTech.edu NHRA Factory Stock Showdown

Based on SAMTech.edu NHRA Factory Stock Showdown performance numbers from the first two races of the 2019 season, the NHRA Technical Department is reducing the supercharger overdrive of the 2019 COPO 350 combination by (5.4) percent from (142.9) percent to (137.5) percent. Additionally, the supercharger overdrive for the 2019 Cobra Jet 327 combination will be reduced by (15.3) percent from (128.6) percent to (113.3) percent. To accomplish the supercharger overdrive reduction on the 2019 COPO 350, the upper supercharger pulley will be changed from (3.500) inches to (3.580) inches. To accomplish the supercharger overdrive reduction for the 2019 Cobra Jet 327, the upper supercharger pulley will be changed from (3.500) inches to (3.750) inches. As a reminder no other changes may be made to all approved superchargers, including, but not limited to: (upper or lower pulley sizes, gear ratios, cases, rotors, etc.). All other permitted combinations in the SAMTech.edu NHRA Factory Stock Showdown will remain unchanged. This rule change will go into effect immediately. NHRA reserves the right in the future to make additional rule changes to control performance and maintain parity in the category.

 







RM