65ShelbyClone
Active member
Its pretty hard to estamate how much power increce a supercharged
It's really not. Atmospheric pressure is 14.7psia at sea level. Put 14.7psi of boost on top of that and power will effectively double minus losses from increased intake air temperature and parasitic loss from driving the supercharger. Figure about a 70% power increase for 15psi of boost. Intercooled turbocharger systems can reach 100% for 15psi, sometimes more depending on how the system is designed.
I’m trying to work this out in my head.. So let’s say 4 pounds of boost.
All before 3,800 rmps that the governor limits the engine to?
What pulleys would you run to spin/overdrive the pump up enough while the engine is only spinning 3,800rpm’s? And if you remove the governor to get more engine speed that makes spinning the pump up easier but the magnet is held on by glue!
I’m just pointing out (I can’t find The post) someone was saying something about a 2” pump pulley and a 32” crank pulley?
Search, read, and learn about blower drive ratios. If you have a 300cc/rev blower and a 150cc/rev four-stroke engine, how much boost will a 1:1 drive ratio make?
question could I do a 90% nitromethane and a 10% methanol engine?
Conceptually yes, but a blown nitromethane engine is the last thing you should be thinking about at this stage. Aside from the pool of knowledge being very small because so few people use it, a misstep with nitro can actually get you hurt. It is very expensive to run, both buying the fuel and replacing broken parts.