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

Now I've shared the big gains, let's look at where I still have some work to do.



TBH everything has worked out better than I ever could have wished for, apart from the horsepower line going flat from 5,500rpm that is. Don't get me wrong, holding 180hp from 5,500rpm all the way out to 7,900rpm is a big improvement, and I can tell you that 2,400rpm top end window is definitely a lot of fun.

It's way better than the previous setup, where as you can see from my Stage 2 graph bellow Monty's Duratec started to fall over at 5,500rpm, he did hold onto the torque impressively well but from 5,500rpm the horsepower clearly dropped off dramatically.



The A.L Developments ported big valve head and Newman Phase 3 cams are definitely doing their thing, but what were seeing here is an airflow restriction from another component.



Throughout this post I've tried to be honest with everyone that there is a very real possibility the Fusion Fabrications long runner inlet will create a restriction up top, but I've stuck with it despite everyone in the Duratec tuning community telling me I need to fit individual throttle bodies.



I'm in no doubt Monty would easily produce over 220hp on ITBs, but I like the torque my above curly wurly FF inlet gives Monty, so I've persevered with it despite knowing deep down it's not the right choice for creating that ego massaging top end number. Hopefully it's clear now why I started by sharing the big gains we've achieved and where it really matters, if I'd just come straight out by saying all the efforts and spending have only given Monty a 10hp gain, understandably people may have questioned my sanity.



However, as I've been saying all along, that top end number isn't really my focus because it only ever tells us a tiny part of the story, what matters are the gains you actually use, and how big they are! Tuning naturally aspirated engines is not and easy exercise, so these significant gains are are definitely a huge success.






Of course I want the top end gains too, but for now I'm more than happy with the results of Monty's Stage 3 tuning exercise, and I already have a plan to allow more air in as Monty goes from 5,500rpm to his new red line at 8,400rpm as shown below, and presented on TM many months ago.



I'll wrap things up for now by leaving you all with this......



Thanks for listening chaps, I hope you enjoyed the post?