Leser litt i Pumaspeed linken Truckdriver la ut tidligere. Her er et artig avsnitt: The worst Pinto engine I ever saw was an absolute abortion of a thing from a firm in Essex "Specializing" in Ford engines. It was a 2.1, twin 45s, Group 1 head, fast road cam, full manifold and system in of all things a Mk IV Cortina. After paying his £2000 and running it in, the guy arrived at the local rollers for a tune up session. No matter what they did to jetting, ignition timing or cam timing the thing wouldn't produce more than 95 at the wheels (say 115 bhp flywheel) - about 10 up on stock and a country mile short of the 150 flywheel the guy was expecting. In desperation the rolling road operator put a rally cam in it but it made no difference to the power - something in there was just stopping the engine working no matter what bits were bolted to it. It had good compression and nothing obviously wrong from the outside so in the end they took the head off and sent it to me for flowtesting. I rapidly decided that I didn't need to go anywhere near the flowbench to tell what was wrong. The "porting" consisted of two milling operations with a boring bar - one from the manifold end and one down the valve throat. Where they met was a sharp knife edge on the shortside of the port that the air just refused to go round and it was playing havoc with the pulse tuning as well no doubt. No-one had been anywhere near it with a porting cutter in even the most cursory attempt to smooth this edge off. In fact to say those ports had never been touched by human hand was probably not that far from the truth. I suspect the workshop staff in that particular "tuning" emporium are paid in either peanuts or bananas, take their lunch breaks in the trees and respond well to the name "Cheetah". But I digress. Burton han sikter til? Blei ganske tent av å lese hele skriveriet, hehe. Det er visst høyt løft og lite durasjon som gjelder, etter hva jeg har greid å tyde av min skabbete engelsk. Men meg som overhode ikke har peiling, hva er høyt løft og lite durasjon? Så jeg veit litt mer hva jeg skal se etter.Og denne berømte "rektige" moddinga av OHC topplokk, hvor finner jeg mer om det? Har et lokk med 44mm in.ventiler og to solex 45mm.