Nope! The underbonnet space and configuration on a trad is a lot more problematic than a Caterham or a Westfield.
I talked to quite a few people about this ( and at the start fondly imagined that what worked in a Caterham would in some cases almost simply 'bolt-over' in terms of space) I soon got 'wised up'

G

PS Nick, isnt that Westie pic showing throttle bodies ( eg Amec, Webcon or Jenvey) going straight in. I COULD go for that- in fact there are loads of kits available and it can also be done on the 4/4 Sport ( The Factory/ Richard Thorne package)

. The problem I have is that I don't particulalry want to go down that route, not least becuase it will, almost certainly, ivolve replacing or at least re-mapping the ECU and I'm a little dubious about this will work with the ancilliaries G

Indeed, you'd probably end up pigggy backing a seperate controller and keeping the OEM unit to do the rest of the stuff... might be worth talking to the Factory though so see if they piggy back or use the OEM controller for the new trottle boddies.

As for the Low/high pressure zone... that's what I'm looking at now...

If you went down throttle bodies though (subject to fitting and testing) I might have a kit that uses high pressure zone cold air feed to supply the intakes without having to cut the bonnet.

I wonder if there's scope to re-jig the heater box on a road car? It sits in a high pressure zone and takes up a lot of space. It's a good place to collect cold air.

On a slightly related topic, I'm about to fashion an 'undertray' for the Roadster to fill the space between the cross tubes and crank pulley. This is for two reasons - it's a big gap and makes the pulley and alternator belt vulnerable to debris being thrown up off the road, and I reckon that it will separate the airflow under the car vs through the radiator. The spoiler blocks some of the air that would ordinarily pass underneath and channels it at the bottom of the radiator, so this should keep the flows apart until just before the pulley, and might even create a pull through the radiator effect. I accept that this is aerodynamic quackery, but it's good to play.

I've fabricated and fitted a front curved spoiler, engine under-tray, rear diff cover and rear diffuser of sorts (similar to that on the new roadster sport.

I was initially worried about over heating, however I think the net result has been positive... with the air flow bieng better managed around the engine without impacting engine running temperatures.

Are you going to mount the front up onto the front splitter you have or just a single plate onto the front of the chassis?

BTW.. the rear of the bonnet is where the Richard Thorne Roadster GT car took it's air intake from.. (2 x 70mm feeds into a reverse fed manifold using an Ali fab'd air box sealed to the bonnet where the heater box is at the moment) but it was designed to run with the windscreen in place... thus creating the high pressure zone.

You can see the bonnet cut-outs in the pic below:

Initially a single plate resting in the chassis bottom - No plans as yet to join it up - It will be suck it and see on the day........
I want to keep the front tube available for jacking, so until I get started I won't know the best way to match it up. It would certainly help to fair-in the spoiler scoop around the radiator bottom tank.
I've wondered about a diff/axle air deflector, but that's as far as it's gone.

I was under the Mog tonight........ actually cleaning the wires........

Some weeks ago I removed all the manifold nuts and applied copperslip to the threads. Just a precaution for when I have to take them off in the future. The next step was to do the same at the joint between manifolds and catalysts. I've changed the washers, lockwashers and nuts on five of the six bolts, the one remaining will need the master cylinder heat shield taking off so that will wait for Saturday, and some pictures will follow. Nearside is easy, but offside is tight access.

While I was under there I was hit by a flash of inspiration. I can use neoprene to duct air from the spoiler to the rad bottom tank, and better still, I can fit an undertray between the overrider irons. They are already drilled. I've already got a piece of carbon fibre in stock so all I need is some aluminium sheet to get this sorted. So hopefully over Easter I can do this job, and also my original plan to box the engine bay in between the cross tubes and crank pulley. It's quite an interesting prospect.