Originally Posted by
houston
Did u try different configurations? From personal experience , smaller more directing grooves yielded the most gain . One exiting towards the exhaust

2 towards the front, 1 towards the exhaust.....
I have tested these cuts before and found no benefits, but i did not have the dyno at the time to properly know for sure... Back when XRC did a dyno test of this technique it got my interest...... Now it may be possible that some configurations may work on some engines..But unfortunately the cost to do the testing would be quite significant...But the configuration I tried on this B5 hurt power, so I likely wont be pursuing this any further.....I will be testing a Rody modded button against a standard button very soon, so I will let you guys know what I find.......
I have been modifying head buttons for some time now, but I am more into messing with squish velocity then anything else...