I just ran the last event in my Boxster V8, it was awesome. My first time drag racing in a long time and first time ever doing the 1/2 mile. Here is a little video I put together including my misfortune at the end of the day, err well it ended my day
https://youtu.be/IQnfV9x5uGA
I started off thinking big numbers then the more and more I talked to people I kept lowering my number. I was thinking 150-160 initially but realized when my buddy with an 800+RWHP CTSV that runs 10.40's in the 1/4 mile said he was hoping to get in the 160 range I quickly changed my tune. The wind is a ***** at those speeds and you are already going so fast after the first 1/4 mile there is not much time left to get a lot more speed.
I've not put my car on a dyno but it runs well, crate motor that is supposed to make 480HP. Car weighed in at 2950 in the scales. Ran a very consistent 142MPH. Temps were beautiful like 60* in the morning with no humidity.
My buddy John @ Fastlane Imports in Smyrna, GA has an 84 M491 car that was converted to LS1, makes 440RWHP I think and weighs like 2400LBS. Car runs in the high 140's I believe.
My guess based on your sig of 402 RWHP depending on the weight of your car and with as hot as it is going to be out there in September you should be pretty happy to get 140~ but wouldn't be surprised if it was less.
Good luck out there, go to the drivers meeting, and KNOW WHEN TO SAY WHEN! Don't be like this guy, it is a LONG drop off at the end of the runway, happened 1 race ahead of mine:
I think it would be fun with the top down! Unfortunately unless you have a full cage they frown upon that sort of think at the 1/2 mile races so had to run with the top up
Objects in video are not as close as they appear! Now i'm not saying that you wouldn't hit them if you went off, but they are not that close~ Just try pick the left lane, that hill on the left is pretty big and spectators are a lot softer then trees
Beware, thar be Mustangs out thar! YAR! If fact that one I raced that beat me was basically right off the showroom floor, freakin' 670HP Stage 3 Roush running 151 MPH.