What PSi do the standard supercharged Mini's run?

[sweatyfox]

Hiya,

What PSi do the standard Mini Eaton superchargers run?

Also what psi is the standard supercharger capable of boosting before it becomes inefficient and needs upgrading?

Mainly after a answer to the first question.

Thanks,

Lawrence

[St00ge]

i think that general consensus is that we run 10.5 psi max.....the second question is a bit difficult to answer, and many ppl have different thoughts as to what they think the supercharger is capable of....

i think with a 15% reduction, the sc is still efficient, but also it depends on what sort of driving you do to decide on what pulley you want....

not many ppl upgrade to a larger supercharger, some ppl port and polish the standard Eaton M45....

[sweatyfox]

Thanks for the repy etalj,

So with the 15% reduction pulley you'll be looking at about 12psi?

Do you think 14 or 15psi would be achievable with the standard supercharger?

[St00ge]

oh no with a 15% pulley you'll be running about 14-15 psi, and with an intake, 15-16.....

your welcome

[bigcoyote]

Hey there,

I am no expert - but according to WEB motorsports the stock boost is about 10-11 PSI. Web has tested the SC with BMW and they say the it is ok up to about 14-15PSI ( 15% pully ) any more than that and it becomes inefficent and generates to much heat. There are ways around those problems - if you invest the time and money. I have seen up to 19% pullys in daily use with little or no problems. There are several members of our local MINI club that have the dual charged ( turbo & super charger ) engines - they are AWESOME

How fast do you want to go? how much money do want to spend??


Good luck

[obehave]

Quote: Originally Posted by sweatyfox

Thanks for the repy etalj,

So with the 15% reduction pulley you'll be looking at about 12psi?

Do you think 14 or 15psi would be achievable with the standard supercharger?

Bear in mind that if you install a better flowing exhaust and/or head & cam combo the boost level will drop.
Boost is nice but it's only part of the formula.

[St00ge]

Quote: Originally Posted by obehave

Bear in mind that if you install a better flowing exhaust and/or head & cam combo the boost level will drop.
Boost is nice but it's only part of the formula.

but you still gain power yeh?

[sweatyfox]

Thanks for all your replies

Does anyone know what rpm the supercharger spins at to make either 10.5 or 15 psi?

Cheers

[St00ge]

Quote: Originally Posted by sweatyfox

Thanks for all your replies

Does anyone know what rpm the supercharger spins at to make either 10.5 or 15 psi?

Cheers

i think its 14000 to make 10.5 psi, and 17000 give or take to make 15

[Brian Cooper S]

Am I right in saying that the SC is different in some models?? Which models have what charger?

[obehave]

Quote: Originally Posted by Brian Cooper S

Am I right in saying that the SC is different in some models?? Which models have what charger?

They're all the same model. Some just have coated blades and some don't. If I remember right all the newer cars have the coated blades. It used to be just a CJW mod.

[1600Dave]

Quote: Originally Posted by St00ge

i think its 14000 to make 10.5 psi, and 17000 give or take to make 15

Can anyone throw any light on the maximum rpm the Eaton supercharger can safely handle ? I'm using one on a 1.8 litre motor , aiming to achieve round the 14-15psi mark, and want to make sure I'm not spinning it too fast.