Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing K&N air filter kit for the Sigma engine

This is my solution to the air intake issue with the GDI: Lightweight alloy heater duct over the intake pipe and alloy heat shield over the manifold.

Good job ,sir...that would certainly help.
But, isn't there room on the other side of the engine?
Why have air coming in on the hotter side?
Ok....you have to consider angles of ducting wrt the intake plenum etc but I am sure it won't be more bendy than the present with having to cross the engine?
There may be limitations with the stock engine set up to prevent this without serious bends etc. but not insurmountable? I don't know the layout under your bonnet on the "cool" side so may be totally off track.
As posted earlier, my 4/4 had similar and there was a heat shield built onto the manifold by Ford as standard for the Escort/ Orion anyway, but not very good as it was too small.
From what I have read, a 7degC drop in air temp gives 1bhp extra. Not huge but worth doing if you are competing and searching for maximum power.
A point to watch for with shielding is where it channels the hot air....possibly knock on effects on components/ wiring/ brake and clutch master cylinders etc..
I have seen a Plus8 with a John Eales engine in it that has the rear bonnet catches modified to hold the bonnet corner open to allow hot air to escape.
I can't remember who supplied the catches though.

We've discussed air flow before, but apparently one of the best place to collect intake air is the heater box area.

Yup. Negative air pressure inside the engine bay at this point.

The windscreen causes a positive pressure over the first couple of louvres......
All my louvres face back so that would help.
That area appears the best for cold air on my Plus8 and not too far from the filter airbox trumpet.
I am talking myself into some work here......

Actually I was thinking that the Morgan GDI intake position may create a ram air effect as it picks up high pressure air through the grill.

The heat shielding looks simple and effective. It should be factory fitted.

I've been told today by Kevin Vernon that the factory set up on my Sport is already a cold air induction so all I have to do is change the filter for a k&N.

1. Have you got the standard air box in front of the engine?

2. Do you have an air intake duct from the air box?

3. Air box with just a hole?

Depending on the above answers to the questions above, will jive you the answer.

1. Yes 3.Yes... It's not cold air it's hot as it's behind the rad.

1. Yes 2.Yes.. where does the air duct run too. It could be to a warm area.. same as above.

So to make a good cheap gain

The opening of the Air ducting faces forward into cold air it's it will act as a cold feed Ram Air induction system as the air will be denser and faster flowing thus giving an increase in BHP and torque.

A good place to put the air intake is above the radiator, a lot of cold air comes up over the top of the radiator rather than going through it.

Some years ago, it must have been around 2006, I was suffering overheating issues with my CVH engine, and tried forcing more cold air through the radiator by blanking off the gap between the top of the radiator and the cowl.

It worked insofar as more engine temperatures came down, but failed in that under-body temperatures went up a lot, causing other problems, so I removed it after a while.

The air intake for my VVTI engine terminates in a K&N filter sat above the radiator on the cross tie between the wing valances, and works very well indeed.