Yes Doug, it's the original manifold removed from my 2011 Duratec Plus 4.

[Linked Image]

I've read some past posts on TM debating if we do or don't have the flaps, so I shared the image to prove the Morgan application does indeed have flaps just as you find in a Mondeo/Focus, and to demonstrate the Fusion Fabrications inlet manifold removes these port restrictions.

I also no longer have the ERG system, reintroducing a small percentage of exhaust gasses function as a filler which has the effect of reducing the amount of oxygen in the cylinder, this in turn reducing NOx. ERG systems can also lower combustion temperatures, however combustion temps are different to intake temps!

People with a Duratec Plus 4 should be in no doubt as these hot exhaust gasses are bled into their inlet manifold, they also significantly increase the temperature of the incoming charge. The next time the subject of how to achieve a cold air intake comes up, we'd do well to remind ourselves there's no point in trying to lower the temperature of the air entering the air filter if further down the line you've got superheated exhaust gasses entering the inlet manifold!

If you genuinely want to lower the temperature of the air entering your Duratec engine and achieve a much denser charge, which is one of the best free gains you can give to any naturally aspirated engine by the way, forget the cold air intake idea until you've deleted the ERG system. If you just create a cold air intake without deleting the ERG system, you're really just wasting your time.

Duratec Plus 4 owners looking for cost effective gains while still retaining the plastic Ford inlet manifold should consider removing their swirl flaps and then completing an ERG delete. These two cheap mods with the addition of a decent long header Super Sports type exhaust manifold and less restrictive catalytic converter may very well give you as much as a 25hp increase, this would take your Plus 4 from 145hp to 170hp, better still the stock Ford ECU should just about handle that without requiring a remap.

Of course the long runner and larger plenum volume Fusion Fabrications inlet with its internal velocity stacks takes things to the next level, and with a pair of Newman Phase two cams we should be looking at achieving 210hp, it's basically Caterham 420 spec or what is regular achieved from the same recipe used to create 210hp on Fiesta ST150's.

However, to get there with Monty his Ford ECU must go, this is why I've gone for the plug and play EMU Black from Ecumasters, although I should be clear this is still very much under development.

Watch this space wink




Last edited by Montegue; 28/05/23 07:58 AM.