Lime Rocks 89db limit is for the "muffled days". SCCA races are much higher....even my car is OK. Sound is generally just after the uphill, drivers right. Turn your tailpipe drivers left and slightly down forlowest readings.

(Isn't it funny how the whole point of dB limits is to not bother the neighbors, but the "workaraound, sue to the meters being INSIDE the track is we turn our exhausts to the outside?? )