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Home > Beginners Tech > Supercharger basics

Mat

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130 Posts
Member #: 9939
Advanced Member

Sussex England

Evening everyone, itís been ages since Iíve been here! Iíve been driving a 1293 Wolseley Hornet for a few years- and finally decided itís not fast enough, or wonít be once Iíve made it Ďcivilisedí. Iíve got hold of a M45 supercharger (sorry), which I hope will suit my 1293 with Sw5 cam, 21253 pistons, and metro head for a fairly conservative pressure. Trouble is, itís been so long that Iíve forgotten all I learnt here years ago. I want to keep it simple, so no mega jolt etc- Iíll run it suck through; what do I need parts wise? I can remember the following:

Supercharger (duh)
Intake manifold
Crank pulley
Tensioner and belt
Boost gauge and valve
Carb to charger piping
Decompression plate (doesnít do enough mileage to warrant going too silly with machining pistons, head etc)
Carb conversion kit? Or is this for turbo only?
Anything Iíve missed?

And what CR should I be looking for? And what boost is sensible? Thanks in advance.



On 17th May, 2013 Rick.SPI said:
Big money if your prepared to do it outdoors in the field.


Yo-Han

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937 Posts
Member #: 3228
Post Whore

North of the Netherlands

From memory....
The M45 will produce quite a lot of heat above 10psi; so without IC going higher could give you challenges.
Having said this I think the suck through versions Stuart Gurr made produced 14psi using std MPI and SC pulley IIRC.
Icing of the suction tube is a realistic issue, I have seen versions with a water heated outer core; you don't want your throttle to freeze wide open (not sure if those stories are genuine).
Get your head done by Phil or Benross.
I think in the past there have been examples of the bowl of the 21253 being enlarged for reduced CR.
As you go for suck through std carb is ok.
Also consider your ignition; an upgrade would do you well and many versions available.

I am no connoisseur by any means and my project has been progressing very (very!) slowely so do bit of searching, there is a lot of info on here.
Might want to check if Stuart is still around for info.

Dazed and Confused....


Mat

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130 Posts
Member #: 9939
Advanced Member

Sussex England

Thanks for your thoughts. I was looking at fitting a short suction tube to avoid that or fuel pooling. I have had a throttle ice open before, on another car- interesting experience! I have electronic ignition; hopefully this should suit?



On 17th May, 2013 Rick.SPI said:
Big money if your prepared to do it outdoors in the field.

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