---
kind: "section"
citation: "40 C.F.R. § 610.63"
title: "40"
number: "610.63"
heading: "Performance tests."
url: "https://uscodex.org/cfr/40/610.63"
---

# §610.63. Performance tests.


The effect of a device on a vehicle's performance will be determined by performing wide-open-throttle 0 to 60 mph acceleration tests (at normal ambient temperatures) on the baseline vehicle configuration, on the adjusted configuration (if required), and on the fully retrofitted configuration. Tests will be conducted on a dry, level, smooth-surfaced test track, with appropriate speed-time measuring equipment, on as many vehicles as determined to be necessary.


## Notes

### Authority

Authority: Sec. 511, Motor Vehicle Information and Cost Savings Act, as amended (sec. 301, Pub. L. 94-163, 89 Stat. 915 (15 U.S.C. 2011)).

### Source

Source: 44 FR 17946, Mar. 23, 1979, unless otherwise noted.