Had an alcohol 825 race demon we ran. Found that the needle and seats would not flow as good as an old set we had in a Holley we were using. Changed them out (both were .150"), picked up about 30hp by that alone checking on the dyno. Ran great and was easy to predict on the motor we had. We put on a Ron's injector and didn't pick of a hundredth. I really liked it and wish we wouldn't have gotten rid of it even though there is no comparison to the throttle response of the injector.
Curtis