Instrumentation for recording the engine's performance will be provided by the SuperFlow/DTS dynamometer operating software/hardware and/or Engine Masters Challenge–approved instrumentation. The channels that will be recorded and available to the participants will be: speed/rpm, indicated torque, indicated horsepower, fuel flow, oil temperature and pressure, fuel pressure, water temperature, air/fuel (or lambda) left and right (two channels), and brake specific fuel consumption.

Data Acquisition

Data acquisition systems are permitted as part of the operating engine management system or ignition system of the engine. Sensors in addition to those listed as provided under Instrumentation for the operation of the engine management system for data acquisition are legal.

Qualifying Dyno Pulls

The team leader must be present during his dyno pulls, no exceptions. Dyno pulls during the qualifying session will be conducted as follows: Engines will be placed on an assigned dyno. Participants will assist the on-site officials and dyno facility personnel in completing the necessary dyno connections and final engine assemblies. Each participant will then be required to review and sign a dyno checklist form, which confirms the engine is ready to compete. Participants will be given up to 35 minutes to start, prepare, warm up their engines, and do whatever they wish once the command to start is given. For scoring purposes, during this 35-minute period, participants are required to make a minimum of three medium acceleration scoring qualifying pulls in any order the participants deem acceptable.

Participants may make any changes or any number of pulls during the 35-minute period. At the completion of the 35-minute timer period or at any point during the 35-minute timer period, participants may elect to stop the 35-minute timer for purposes of using the remaining time during final eliminations if the participants make it to the final elimination bracket. Participants then select the three pulls to be used for scoring purposes. The participants' engines shall be removed from the dyno.

Correction Factor

Correction factor to be used during the contest will be SAE J607. Barometric pressure, temperature, and humidity will be recorded at the beginning of the timed period used for scoring purposes. Correction factor data will be documented on a dyno checklist.

Scoring – Qualifying and Final Eliminations

Maximum rpm for scoring purposes: 6,500 rpm. Performance rankings for the competition pulls will be computed using average uncorrected torque, average uncorrected horsepower, uncorrected peak torque, and uncorrected peak horsepower numbers from the SuperFlow/DTS dyno. The final score will be determined and the corrected torque/horsepower numbers for the participants' three competition pulls will be calculated by the event director and/or designee. Each entry's scoring is a direct result of a team's engine dyno performance, and resulting scores are specific to the engine. Points and scores are not transferable from a team's engine to another engine entry by the same Team, nor are points and scores transferable from one team to another team.

If an event is postponed for any reason prior to the start of the scheduled run, it is necessary that any engine and team still eligible for event competition be in attendance at the rescheduled date and time to be eligible for all scores and any contingency monies and/or awards. If an event is postponed and/or disrupted and rescheduled due to weather or other conditions, natural disasters, acts of God, etc., participants unable to return will not be eligible for any final placement and/or contingency monies and will be listed as Did Not Finish (DNF) in the event competition postings.

Scored qualifying pulls will consist of three medium acceleration pulls with scoring data recorded from 3,000 rpm and ending at 6,500 rpm. Average corrected torque plus peak corrected torque from each of the three scored qualifying pulls will be added together to arrive at an average torque quotient. Average corrected horsepower plus peak corrected horsepower from each of the three scored qualifying pulls will be added together to arrive at an average horsepower quotient.

To compensate for the different engine displacements, the average torque quotient for three dyno pulls and the average horsepower quotient for three dyno pulls are added together. The sum of the average torque quotient and the average horsepower quotient are multiplied by 1,000 and then divided by the claimed cubic inch displacement of the engine. This will yield a quotient number to be used for scoring for engine dyno results. Final quotient numbers are recorded to one decimal place on scoring form. Rounding of numbers will be utilizing standard rounding: Example 2232.96 = 2233.0.

Claiming a cubic inch less than actual calculated cubic inch as stated in the Engine Displacement section of these rules shall result in disqualification. Claiming a cubic inch 5 or more cubic inches greater than actual calculations shall result in disqualification.

The official rules offer more details on the scoring system, including the dyno settings, the rounding procedure, tie breaking rules, and other considerations and serve as the official guidelines for scoring at the event.

Points Deducted From Dyno Scoring

Ten (10) points shall be deducted for each specific infraction from the quotient number of any participant found to be claiming a contingency product that is not used. Contingency product must be on engine, and proof of use and/or purchase may be required as specified by Engine Masters Challenge Event Management. Thursday, there will be an external contingency verification inspection of the top five scoring engines. The results of the dyno scoring minus any points deducted for false contingency claims will determine the five engines that will compete in the final elimination bracket.

Friday, during post-event inspection, an internal contingency verification inspection of the top three scoring engines will take place. Ten (10) points shall be deducted for each specific infraction from the quotient number of any participant found to be claiming a contingency product that is not used.