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danboy

715 Posts
Member #: 1381
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Doncaster, South Yorkshire

15th Jan, 2007 at 10:03:44am

Can anyone tell me the effect of fitting a supercharger which is bigger than the generally accepted size?
I am talking Eaton from a Bini on to a 998cc A series specifically, but a general answer would be fine.
I realise many people have done the conversion on 1275/1380's and it works well.
Has anyone installed this particular blower on the front of the engine? A few pictures would be good if you have (please) it will save me from re inventing the wheel.
Regards
Dave

Paul S

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8604 Posts
Member #: 573
Formerly Axel

Podland

15th Jan, 2007 at 10:55:17am

Try this:



You will need to calculate pressure ratio and air flow from your required boost, then plot on the map below to work out the speed required.





Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

blown_imp

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223 Posts
Member #: 598
Senior Member

Gaol

16th Jan, 2007 at 12:11:38am

here is my supercharger calculator, could well be useful!

http://www.turbominis.co.uk/up/calculator_...ercharger-1.xls

and a good thread

http://turbominis.co.uk/forums/index.php?p=vt&tid=128332

J

Edited by blown_imp on 16th Jan, 2007.

On 5th of Sep, 2006 at 05:47pm mini13 said:
I reckon if his brains were gunpowder he couldn't blow his own hat off...

danboy

715 Posts
Member #: 1381
Post Whore

Doncaster, South Yorkshire

16th Jan, 2007 at 10:24:51am

Thanks Axel & Blown Imp, The links and info are great.
What I really wanted to know was what effect effect there would be on the driveability of the car.
If I were to fit a larger than optimum blower on a 998 what would the drawbacks be?
Regards
Dave

wil_h

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9258 Posts
Member #: 123
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Betwix Harrogate and York

16th Jan, 2007 at 11:13:33am

This is an educated guess. Assuming that you selected the correct pulleys to get boost at a reasonable RPM, I would have thought that drievability could on the face of it seem ok.

However, you will be running the SC in a low efficiency part of the map meaning more heat, more energy to run etc. This will ultimately limit the power capabilities of the engine, and if it's really bad, result in a melted engine.

As said I guessed this, is it about right?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


blown_imp

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223 Posts
Member #: 598
Senior Member

Gaol

16th Jan, 2007 at 06:33:11pm

Im using a blower on my 930cc imp, as far as i have calculated the eaton M45 seems fine for this capacity.

Its in the lower capacity range but if you look at this map -







Its seems to be in a pretty good efficiency area.

J

On 5th of Sep, 2006 at 05:47pm mini13 said:
I reckon if his brains were gunpowder he couldn't blow his own hat off...
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