There are many variables with these engines but if it is running well and you have good smoke and the run time is in the 9-10 min region then I would say it is perfect. I have had GRP's run as hot as 220-230 in a heavy truggy and then on some days right around 200. I know racers that run their GRP's at 190 all day long and they get 10-12 gallons out of them. Look at the performance and smoke that comes out of the pipe if that is good then dont worry about it.