Subject: Re: 113 head chamber question by flyboy on 2010/2/19 23:56:52
2 sets of zz4's (same casting as the 113) on eBay. One set has it, the other doesn't(ground off?). I am working on these heads and need to find out if grinding this projection off will benefit combustion. It certainly doesn't look like a power adder. The carbon spot in the chambers should tell me something. Need to do some legwork.
