![]() ![]() When pulled in and stopped engine temps went up to 210F after 10 minutes Oil heat soak,twin elec. ![]() , other day here in central TEXAS 102F ambient, out for drive for 1 hr, check digital gage while driving,standalone ECU readouts, 180/185F, cruising, some city,some hiway! That is exactly what i did to my heads 21yrs ago, pre HE flat chamber, unshrouding both valves go deeper into the bore,(something like a higher lift cam). Then a nice thermal barrier coating of the complete head surface, and exhaust port coating, to reduce heat transfer into the coolant jacket, trying to reduce V12 overheat problems! Now after some thought on this head, i would just flat mill surface cut the whole head surface down to the edge of the INLET valve seat, that way you would still have the Quench area intact,I consider it very important on a forced induction chamber.īut lets look at how much deeper the inlet valve unshrouds and protruds into the cylinder bore, using any type cam, remember we are trying to get more air into the cylinder(not the chamber). Something like the 6.0 chamber but larger, using a custom shaped Ball mill cutter, then some fine hand work, rough edges! OK if i had to do HE heads for lower compression, i would open up the area around the exhaust valve larger(unshroud exhaust valve,and lower comp.). Please register or login to enable Dark Mode.Forum announcement archives / Forum History. ![]() PRIVATE For Sale / Trade or Buy Classifieds.Other Jaguar Models / Concepts / Replicas.S-Type / S type R Supercharged V8 ( X200 ).Jaguar Forums Feedback & Suggestion Center. ![]()
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