I will try to answer as much as I can. Please understand that I have spent a lot of time and money on this research to figure all of this out, so please dont beat me down for not giving you all the exact data on the injectors. In the end remember, we at ATP Racing are only trying to give everyone a better product for your money.
The stock injector was engineered for a 450cc engine (obviously) with the maximum crankshaft
HP of around 65 to 70hp. That would be the high end number to run at. Now 65 Crankshaft HP relates to roughly 55 to 58 RW hp. Obviously these numbers vary so much between dynos, our main concern is to have an injector that is only working 50% as hard as it is designed for instead of 90%
Our next concern is that, in the lab where all these studies on the injector was done, the environment is as close to 100% ideal as possible. The pumps are tremedusly larger than that used in the application, the temperature is a fixed constant, ECT.
So what does this all mean? First you have an injector on and engine that is making 65 crankshaft hp, that number being near the injector limits, then add 200+ degrees of outside and engine temp, lastly, ask this poor injector to pulse properly thousands or millions of times during a race or ride
The new injectors are 8lbs larger than stock and will handle 90 to 100 crankshaft HP without maxing the injector.
This new injector will also work well with our new Billet Trottle body when it is production ready.
Hope this answers most of your questions. Let me know if there is anything else you would like to know.
Drop me a PM for pricing.