Main News
By Greg G.
Published: March 27, 2006
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All TTU competitors be advised that the rule regarding maximum horsepower allowed in the TTU class has been ammended. The intent is to maintain the 650 hp limit (at the flywheel), but for compliance purposes, the rule has been changed to describe limits of horsepower to the wheels based on chassis dynamometer testing. So, regardless of a vehicle's horsepower at the flywheel, it must now comply with the new wording.
In Section 6.2 Base Classifications in the first paragraph describing the TTR class, the wording, "or has greater than 650 horsepower" shall be substituted with the following wording:
"or has greater than 500 awhp for AWD vehicles, or 560 rwhp/ fwhp for non-AWD vehicles, based on chassis dynamometer testing (NASA may use a Mustang, Dynojet, or Dynopack dynamometer, depending on availability, to verify compliance. Competitors are forewarned to leave an appropriate "cushion" so that they will be in compliance regardless of which type of dyno is used.) 3-27-06
Also, all competitors should be aware of any addendums or changes that have been made to the rules since their original release. The most significant topics include dynamometer testing for naturally aspirated vehicles that have added forced induction and re-base classing, high points assessments for ported rotary engines, Watt's link assessment, and assignment of a points assessment for intake manifold modifications to rotary engine vehicles. http://nasa-tt.com/Rules/p2005_articleid/30
