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Old 07-14-2019, 03:44 PM   #4
raydhd
VC 460 CLONE GONE WILD
 
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Join Date: Oct 2014
Location: Ray BY The Bay NJ
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Default Re: Head porting tools for GX390/Predator420

Quote:
Originally Posted by chrisr32 View Post
I know there are a lot of tools to port heads, but is there an inexpensive starter kit that could be used to improve flow? I already have die grinders and some small bits just have never ported a head before.

Thanks in advance for your help


This is similar to what I have but mine are from Blue Point (Snap-on) that I bought from many, many years ago...

https://www.mscdirect.com/product/details/00478503
When I did my 2 heads used carbide cutters such as you have. There is a LOT of material to remove in the valve pockets and valve shrouding.I used old valves to protect the valve seats when doing the !/8" right off the seat.There is also a LOT of material on the pyramid around the valve guide. There a long shanked cutter with the seats taped up worked best.Once the big amounts are removed you can use the fine abrasives to clean up the cutter marks.
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