Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) Monty Takes A Deep Breath

The above predicted Stage 3 torque spread is AI generated, but it should be pretty accurate. I fed AI with the Phase 2 cam spec and my Surrey Rolling Road graph, then gave it the Phase 3 cam spec the crosssectional area of the pre and post worked ports, and finally the 1mm larger inlet and exhaust valves.

I appreciate 1mm on the valves doesn't sound like much, but in percentage terms it's signigficant, and of course there's 16 valves so the increase in airflow measured in CFM actually becomes considerable, especially when you add it to the port enlargement data. The additional lift and duration provided by the Newman Phase 3 cams is really just there to ensure we take full advantage of the potential additional airflow offered by the bigger valves and port enlargement work, although the shape of the ports is arguably more important than the volume increase which is where the real skill of A.L Developments comes into play.

The good news is AI is predicting Monty's current torque curve shape remains completely unchanged, we're just making a nice chunk more torque at Stage 3. Critically we're still enjoying 81% of peak torque at just 1,800rpm, and better still now holding onto 87% of peak torque all the way out to the new 7,500rpm red line! That's going to mean in Stage 3 tune Monty will essentially feel like a massively stronger version of his current self, with his Duratec delivering 23% more horsepower and 10% more torque everywhere and this over the current Stage 2 tune.



Very soon we'll find out how just good these AI Stage 3 etimates really are?

Dave