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[Jim Drago]

https://www.scca.com...o-data/download


MA 21-05
November 04, 2021
Club Racing Board
Spec Miata Participants
2021 Indy Runoffs SM Dyno Data
To All Spec Miata Participants,
Member Advisory
Technical Services
MA 21-05
NUMBER:
DATE:
FROM:
TO:
SUBJECT:
The Club Racing Board held a dyno session at the 2021 Indy Runoffs consisting of three top NB1’s, two top NB2’s and one top NA8. Attached below are the results from that session.
For additional details, contact the tech department at SCCA. 800-770-2055
tech@scca.com
Thank you,
Club Racing Board
Revised: November 4, 2021
Sports Car Club of America, Inc. | PO Box 19400 | Topeka, KS 66619

2021 SM Runoffs Dyno Data overview
– Sam Henry – CRB

NA8 & NB1
four cars, best 5 pulls for each
RPM range used when shifted near rev limiter

NB 2 (VVT)
two cars, best 5 pulls for each
RPM range used when shifted near rev limiter

Mathematical average NB1 vs. NB2 (vvt) based on best 5 runs of cars tested
Notes:
Curves generated using dynojet’s run averaging feature in WP8 software
Vertical line with leader arrows indicate approximate RPM resulting from a shift example 3 to 4 (car would likely stay to the right of the line on straights and similar). HP and torque values are indicated at the leader arrows. Break out chart to right is to scale difference at high rpm.
Green = VVT, and Blue = NB1, NA8 not included due to only one data point.

Dyno work instruction and details
Other Info:
The Dyno was a Dynojet model 224 with latest software installed in good working condition with trained crew and supervision.
Cars were chosen after early Qual session based on lap times. Cars were impounded after Q3 and escorted straight to dyno with no changes.
CRB and dyno operated the cars and/or dyno.
RPM calibration based on speed, same ratio used for all cars.
All teams selected provided 100%
cooperation and support. Thanks! Personal info covered

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The End