ported 243 heads
09-04-2014, 02:57 PM
#2
On your next set have the combustion chambers and face of the valves ceramic coated.
That's what's being done to my 243's right now, along with a port job.
If these are of interest pm me an offer as I'm undecided whether I should use the 317's I'm having the same work done to or use the ported/ceramic coated 243's.
That's what's being done to my 243's right now, along with a port job.
If these are of interest pm me an offer as I'm undecided whether I should use the 317's I'm having the same work done to or use the ported/ceramic coated 243's.
09-04-2014, 10:55 PM
#5
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this is my second valve to go away.. the first was a stock 243 ex valve, car had a fuel pressure issue and went lean.
these heads shouldn't have had an issue. afr was 10.8 to 11 on the run before I checked.. these were manley stainless valves.. it seems from all the reading I have done that for extreme use such as I am doing racing constantly that people are running either Inconel or ti ex valves.. Im replacing the seat in this head and installing Inconel ex valves.. these will take a higher egt of which at this point I can only assume is the demise of the lesser ex valves..
these heads shouldn't have had an issue. afr was 10.8 to 11 on the run before I checked.. these were manley stainless valves.. it seems from all the reading I have done that for extreme use such as I am doing racing constantly that people are running either Inconel or ti ex valves.. Im replacing the seat in this head and installing Inconel ex valves.. these will take a higher egt of which at this point I can only assume is the demise of the lesser ex valves..
