zajac Posted April 3, 2018 Share Posted April 3, 2018 The NASA 2018 Annual Inspector's Form notes that "A number of items are not required in Time Trial (TT) cars. My question is about an item not required for TT cars is listed under the "Engine Compartment" heading. "No antifreeze in cooling system". So, for a 2018 Annual Inspection requirement, are TT cars required to have "no antifreeze in cooling system" like race cars are required to? Quote Link to comment Share on other sites More sharing options...
getfast Posted April 3, 2018 Share Posted April 3, 2018 TT is effectively HPDE5 so TT follows HPDE safety rules not racing ones - therefore, antifreeze is allowed. Quote Link to comment Share on other sites More sharing options...
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