Following on the posts on facebook and the chinese whispers around the pits we would like to explain how the above rule 124 is interpreted by the club and committee.
May we also remind you that if there are any queries over rules please contact us through the club email address, not Facebook. Warton Stock Car Club do not have an official facebook page and as such cannot guarantee the accuracy of any information given out either verbally or through any social media.rule allows the heads to be brought to similar specification by specifying the size of valves allowed to be used.
Valves must be standard road specification valves of the sizes specified above. The head must not be ported or polished, ie no modifications are allowed to be made from the manifold face through to the valve seat. The valve seat itself can be recut to any angle but modifications must not extend into the port, 3 angle valve seats are permitted.
It also states that no machining or fettling past the valve seat, so by default this allows modifications up to, but not beyond the valve seat, ie to the chambers.
So the benefits of the current ruling are that as valve seats get worn or recut on several occasions causing the valve heads to recess into the chamber face, this can be corrected by removing metal to bring the chamber back in line with the valve head when in its closed position. It also allows the valves to be unshrouded when fitting the larger valves into the small valve head castings. Both of these points prolong the usable life of the head and mean that head selection is less important as heads can be almost standardised regardless of original specification.
As such the above ruling in its current state allows the modification of the chambers to for valve changing, it is not deemed within the spirit of the rule to carryout excessive fettling to gain performance increases.
May we also remind you that if there are any queries over rules please contact us through the club email address, not Facebook. Warton Stock Car Club do not have an official Facebook page and as such cannot guarantee the accuracy of any information given out either verbally or through any social media.
