Rover 3.9

I believe it's the original from the self build in 1998

I can follow your line of thought; all dependant on the back pressure (under/over pressure created within the engine bay)

Here's an interesting article running the engine cooling system at a higher pressure allowing the engines to run 90 deg's F above stock limiting the effects of cooling drag by tapping up the radiator vents.

https://jalopnik.com/the-fascinating-reason-why-nascar-engines-run-so-hot-1835071544

Also noticed; not only are the vent scoops reversed as you said they sunk below the body line.

So in essence keeping things standard without changing the cooling system as per NASCAR (£££) one needs to ensure engine bay pressure is always lower than the inlets

3 hours ago, Mrbarry said:

Have you ever put short lengths of string on the leading Lower edge of the bonnet scoop and observed the air flow at different speeds? I’m intrigued as to the results because I have an idea the airflow will do all sorts of stuff. 

Relatively new to kitcars; always wanted to build my own 7, this came along and I grabbed it with both hands. Yes I could see the scoop having positive & negative effects on the air intake; possibly the reasoning behind the two hoods available. This scoop design plus the open 360 with the pancake filter poking up out through the hood. Shall take a look once I have her back on the road.

Here's my 1998 Tornado Raptor on the day of collection

On 11/1/2019 at 7:57 PM, MarkBzero said:

Hi David H,

There's a few of us in Telford area, feel free toake contact. 

What car do you have?

Mark

Hi Mark

I have just purchased a 1998 Tornado Raptor Rover V8; wee bit of tidying up to do over the winter, looking forward to getting her out the road.

Cheers David