9 replies to this topic

[willava182]

Really like the look of something like this but how do they fit, what are my options and where can i get something like it :)

 

Cheers

 

 

[Tupers]

They're Metro bonnet vents, I think the just screw on from underneath. 

[Bungle]

yep metro vents

[willava182]

yep metro vents

Interesting... Can't find any for sale though

[Dan]

I think ABS Minis make copies.

[rally515]

Usually a drill and cut a hole out and rivet a scoop of some discription on.

 

Although go to a scrappy and cut some metal vents out that you like and weld them in, much neater and flush finish :)

[Lennyliverpool]

Mine came as part of the bonnet no screw ins

Must say i like them and i have not seen another like it

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[tommy boy]

Really like the look of something like this but how do they fit, what are my options and where can i get something like it :)

 

Cheers

 

 

Question about the grill position.

I run a small v-tec, using bike carbs. These carbs are positioned about where the passenger side vent is, and it would be useful to have a decent airflow directly to them. But, will the vent push air in and cause positive pressure in the engine bay, or , as I have read before on the forum, cause negative pressure.

Lifting the rear of the bonnet, some have said, will do strange things to the airflow.

 

Opinions welcome please

[phil hill]

The scuttle area beneath the windscreen is generally under slightly positive pressure when you are moving, so the airflow will be into the engine bay when you are moving.

 

This is only an aerodynamic effect caused by the motion of air over the "shape" of the car, so when you are stationary there is no flow, no stagnation and therefore no pressure there.

 

Think about where a lot of modern cars get the air-flow for their heaters, Metro being one example, Peugeot 206 being another.

 

There are "modifications" for late Honda Civics which relocate the air inlet to the scuttle or edge of the bonnet for the same reason, but all the above are ducted into either the heater system or intake filters to avoid the lift issue.

 

In real terms I don't think it's going to be an issue on a mini because the lower engine compartment isn't sealed off like most modern cars, there is plenty of airflow going underneath the car, and I don't think you are going to be going fast enough to worry about a modicum of front lift............

 

Unless you have access to Mira's wind tunnel !!

 

Phil.

[tommy boy]

Thanks Phil

 

Your logic seems very sound. Looks like I need to cut a hole then.

 

Cheers

Allan