Turbobike Web Site www.Turborick.com
Hello all, my name is Thomas Gafa and I'm fairly new to this list. I have a couple of questions that I hope someone can answer. I have an '86 GSXR1100 Mr. Turbo draw through system with a mikuni hsr42 carb. I have JE 78mm 9.5:1 pistons (1109cc). I was wondering 1) what is the proper starting line procedure for this type of system at the drag strip. For example, would you hold the rpms at a constant rpm, or wing the throttle constantly to get the turbo spinning? I do not have wheelie bars, I am running a street tire, and my swingarm is not extended yet but will be extended +6" in the near future. Also, 2) what should the exhaust gas temp be at the header collector, at the turbo exhaust inlet, and at the turbo exhaust outlet. I had an EGT sensor at the turbo exhaust outlet, and I never got above 1300 degrees F while under boost. I think the temps would be 200-300 degrees F warmer at the collector and turbo inlet, but I was wondering if anyone has measured this or knows what the ideal temps would be? I have a 230 main jet in the carb, and have run 19-22 lbs boost. I collapsed the ring lands on the stock 1 and 4 pistons, thus the new lower compression JE pistons. Also, 3) what is the best gearing for dragstrip use for this setup without a wheelie bar? I am using a 15 tooth counter sprocket and a 47 tooth rear sprocket. Stock is 14/47 sprockets. ANY help or response would be GREATLY appreciated. If you need to know any other specs, please let me know.