I was going to try racing it this year, a few races without heading to the mainland. At WOT my 800 EPS had 1.5 inches of vacuum, I replaced the camshaft this year and it will make power at a higher rpm than the previous camshaft so I bought the bigger carb for more air. I maxed out on power at 5200 with the old cam, this one gains HP until about 6200. I have taken the Q-850 completely apart and found some debris inside, I will try it again when I can get a chance. Car is stuck in it's bird house until I get my current work contract done. No work - no eat, what's worse no work - no gas.