9 replies to this topic

[Cacharro]

Hello!

I've got a mini to make experiments and another one. So I will use the bonnet of the "mini for experiments" to make a cold air intake. I'll make something like that:







(sorry if I use the mini of someone of that forum without the owner autorisation)

And put under de bonnet something like that:





That's from:
Front Flow - Performance cold air systems

And another web that sells induction kits:


http://www.autoimagi...o...y=11&sub=46


But make the holes is not a problem, I need some induction kit to increase the cold air flow to the carb.

Can you show me yours and tell me where do you buy it?

Before you ask me I must tell you that I don't make it with Carbon Fiber o Fiberglass because I don't know how work with it....

PD: sorry my poor English.

[Dan]

There is no point in these things in a Mini. The air temperature at the back of a Mini engine bay is exactly the same as that at the front once the car is travelling over 17 mph. The pressure at the back is actually higher. Minis have a massive grille and a slanted bulkhead that together work to draw tons of air through the front of the car in a way that other designs don't. There has been much testing of this done by various people over the years using temperature mesuring equipment and it has been proven that there is no point. Worse than that, any design that uses convoluted or flexible corrugated hose actually harms air flow to the carb because the hose walls cause massive turbulence inside the hose itself, seriously limiting the amount of air that can physically fit through it. All it will do is clutter your engine bay up with junk and make it harder to service the car.

[Cacharro]

Dan:

thanks for the quick answer

But it looks strange that if you run more than 17 mph (about 27 km/h, what a strange speed unit have you got... ) the temperture inside de bonnet is the same...

But what do you think if I make a duct on the carburator to evacuate the heat of the manifold? Could it works?

Another thing is separate the air filter from the exaust manifold. Do you think that it could make something?

[MrMini]

Cacharro - You may find this thread interesting.

http://www.theminifo...x...forced&st=0

There are arguements for and against. Many opinions are simply others repeating something they have read elsewhere so i would take replies with a pinch of salt.

I hope it helps.

[Cacharro]

I believe tests were carried out using air duct in a mini in a controlled environment. thats how dan knows.
trust me they dont work.

No, I believe you! The level of this forum is very hight comparing to ours. I was reading the haynes and they speaks about the turbulance and his importance so it could be there a problem.

Thank's

[rozzer!]

i used 1 of these when i was running twins, it showed a noticable difference when running. it ran a fair bit smoother than without. ment i didnt have to have the bonnet raised up slightly at the back.

[cap'n crunch]

this thread is a good one as well

http://www.theminifo...ld air intake

[TrialsLife]

If your thinking of reducing under bonnet tempratures to improve performance in some way, you could try exhaust manifold heat wrap. Helps keep the heat inside of the manifold instead of letting it escape near the carb.

Although, I'm not sure how affective this is performance wise.

Also, you have to remember about running your carb too cool.

Whats the average temperature of where you live?

[mk1leg]

This is not a new thing its been done in the 60s, Ihad a similar one fitted to my cluby 1000 racer ......................

[Cacharro]

If your thinking of reducing under bonnet tempratures to improve performance in some way, you could try exhaust manifold heat wrap. Helps keep the heat inside of the manifold instead of letting it escape near the carb.

Although, I'm not sure how affective this is performance wise.

Also, you have to remember about running your carb too cool.

Whats the average temperature of where you live?

I live in Spain, in summer is about min. 27ºC and 36ºC. In winter min 5ºC and 15ºC. So I think that the temperature is a problem.

After all that info, I'm thinking to make a intake at the top of the bonnet, near the windscreen on the carb, to cool the air in that zone.

Can it make something?

I saw a lot of people that wears the bonnet opened at the windscreen but closet at the grill. It's for the heat evacuating, really? Does it effective?