im pretty sure early williams/valvers ran the higher stats (87?) and the later ones ran lower (83?) My ealry 16v ran hot then i swapped the stat and ran much colder inline with the lower temp switch it had always had then put a williams engine (1995) in it and cooler, and then i bought my N reg proper williams has always ran coolish, wamrs up fine bet dosent really go above the first mark on the temp gauge unless stationary.
Anyone know when the ECU switch off the 5th injector/cold start/rich running or what ever it does and run as normal? Is it done by the oil or water temp? i want to be confident mines running properly when warm as the fuel eceonomy isnt quite as good as i rmeber my williams engined valer to be.