08-01-2023, 10:23 AM
My RP saloon has standard carburation with no filter. I have now covered almost 20K miles in four years of ownership, the total recorded mileage now being (1)13923. Shortly after I bought the car, it developed a knock which turned out to be a little end. Upon examination, the engine had been bored to 20 thou oversize and the bores were all in good condition, merely requiring deglazing before fitting new pistons. After about 10K miles, I had occasion to replace the cylinder head gasket and found the bores still in excellent condition. Not having an air filter therefore does not seem to be a problem, but I am aware that opinions differ and I suspect that the argument will go back and forth without any clear resolution.