Getting small flow gains yourself isnt hard and is jsut basic detailing of the port shape. But you wont really gain much from the F7P with detailing as the port isnt as such a good shape , btu just so soddingly large that you dont want to remove anymore material if you dont know where to remove it from.
If you want any significant gains they can be had DIY but youll wreck a fair few heads learning and need a good 6 months to a year to end up with any real clue as to why you are doing what your doing.....knowing what to do isnt the hard part, understanding why is.
Finish becomes inportant when were pushing the finite boundaries of that particular port, fueling whether carbed or injected can affect finish as does port length and if its inlet or exhaust. Typically a rough finish is better all round for reasons i dont need to go into.
Specific tools are needed to get the job done properly and to an acceptable level. Wit so many people claiming to do good headwork and then you actually see their work, its a right big con and choosing from the back of a mag is a lattery at best.
PM me and ill supply you with full details of my work, suffice to say i do ALOT for the money. One thing i do that most dont is remove the valve guides as you just cant do a proper port shape with them in, i replace them with new hardened phosphor bronze guides custom made and reprofiled.
