Gap is the driver's best lap in a session against the fastest lap in their class in that same session (zero is fastest in class), shown as time lost and as a share of the lap, so conditions cancel out and tracks can be compared. Typical is the median session.
Thank you for your letter. This engine doesn't require a spec line. It falls under 2.0 L and is normally aspirated. It is 11.5:1 compression so it has to have the compression lowered when prepared or take the weight penalty of 1.5% as outlined in 9.1.4.2.B.4a. The lift on the intake cam is also greater than .425 so it could be modified to meet our spec or take the weight penalty as outlined in 9.1.4.2.B.5.a.
STU Clarification on Dogbox Gears in H-Pattern Transmission
In ST Category Specifications, GCR Section 9.1.4.D.3.a, change as follows: "Definition: A horizontal, single-plane aerodynamic device attached to the lower est point of the front of the vehicle, protruding forward. It is intended to divert air and produce downforce through vertical pressure differential. A splitter shall have no vertical deviations."
STU Clarification on OEM crankshaft interchangeability