Here is a comparison of a heavily ported RPM head versus what some basic work on the Sidewinder casting did for flow. I have half as much time in getting these castings to this point as I do when porting an RPM head.
I have no doubt there is more flow available in them but these received a level of work that will work great on a hot street engine they will be run on.
Thanks to Todd at CompWedge Engines for giving me an opportunity to look at these, I will be selling a few sets when all the testing is done.
I will keep people updated as the build is soon to be done and when it is I will do some dyno testing and compare these to nice set of Iron heads.
Keith