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Old 15-02-2008, 08:13 PM   #1
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Default Superchargers!

I think i may have found a supercharger that fits in a beetle engine bay!

With second hand Judson and Shorrock kits being few and far between these days and selling for four figure sums i thought this may be of interest to some of you.

Whilst randomly searching the internet i came across this:


Its an AMR 300 Mini supercharger originally used in the Subaru Vivio and Nissan March.

The good bits are:
1. It measures approximately 18.5cm in length (including the pulley) and the main body is around 15cm wide and 10.5cm tall so should fit snugly next to the alternator.
2. Its rated for engines up to 47KW or 63BHP and is therefore perfectly suited to a stock small capacity aircooled engine. Theres also a slightly larger version called the AMR 500 which is a cm or two larger in some dimensions but is rated up to 81KW or 101BHP, perfect for slightly larger motors.

And after much searching i've also found someone who has made the conversion in Australia although there is very little information. The install is not the neatest but it could certainly be improved.


As far as i can see, all you will need is a modified throttle linkage / cable, an oil feed and drain running back into the case, an SU carb and some mounting flanges and adapters. Maybe the stock intake manifold centre section could be replaced withe a T piece for increased flow and of course a new bottom pulley would need to be added with a belt to the charger.

Its not something that i can see myself doing in the near future but i thought this may interest some of you power pioneers out there, especially with all this talk of Hot 1200 monster mouse motors and the like.

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Old 15-02-2008, 08:26 PM   #2
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I'm thinking that if you used an electromagnetic clutch like those found on air conditioning pulleys you could also turn the supercharger on and off at will!

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Old 16-02-2008, 07:12 PM   #3
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I'm thinking that if you used an electromagnetic clutch like those found on air conditioning pulleys you could also turn the supercharger on and off at will!

If you did that you would need to bypass the main vanes as if they are not turning they effectively seal the intake.

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Old 16-02-2008, 07:38 PM   #4
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would this generate more bhp than a t3 unit?
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Old 16-02-2008, 07:40 PM   #5
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i presume you would have to improve your intake seals , how much would the unit cost 2nd hand?
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Old 16-02-2008, 07:51 PM   #6
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I'm thinking that if you used an electromagnetic clutch like those found on air conditioning pulleys you could also turn the supercharger on and off at will!

like in mad max
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Old 16-02-2008, 08:14 PM   #7
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like in mad max

They did that by just turning the engine off
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Old 17-02-2008, 12:12 PM   #8
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would this generate more bhp than a t3 unit?
The basis of the answer to that question is- depends on how fast he turns it.
In an exceedingly brief summary - mechanical driven superchargers like that deliver a linear output vs. rotational speed.
And they can be driven at almost any speed.

They do not have a map like exhaust driven superchargers - ie turbochargers.
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Old 17-02-2008, 07:06 PM   #9
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i presume you would have to improve your intake seals , how much would the unit cost 2nd hand?
If you used the stock intake manifold you would need to replace the rubber joints between the centre section and the end castings with silicone hose as per a turbo installation although it would be preferable to replace the stock centre section with a T joint of larger diameter tube.

Its very hard to compare this to a T3 turbo as the superchargers i am talking about would be more suitable for engines from 1200-1300cc for the smaller 'charger (AMR300) and 1600 for the larger (AMR500). The t3 would be more suitable for capacities from 1800cc up as a rough estimate.

As for price i have no idea, but the best thing to do would be to ring a Japanese import part specialist.

The part ID for the AMR300 = Subaru EN07
And for the AMR500 = Nissan MA09

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Old 09-04-2008, 12:17 PM   #10
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And after much searching i've also found someone who has made the conversion in Australia although there is very little information. The install is not the neatest but it could certainly be improved.
hi that'd be me
that pic is from my photobucket album altho ill say now that aint mine that was a pretty rough install that car and it was semi auto too
those little AMR blowers arent really worth the effrort
that one was a 300cc but there is a bigger 500cc but there pretty rare around here u have to spin them at about 10000rpm just to have any affect on a 1600 and theyre made for 600cc 3 cylinder engines
i use the toyota blowers instead
ive had a SC12 on my 1600 for nearly 6 months and have just removed it to put back in my 1776 that i had to decompress to run the blower

the SC12 is rated at 1200cc so its 4x the output of those pissy little AMR and has a factory clutch
altho these are pointless i never turned mine off anyway
u can drive like a nanna and u wouldnt know that there isnt a stock 1600 under the decklid put ur foot down and powers there instantly no fumbling round with switches

if u wanna know anything about mine just read
http://forums.aussieveedubbers.com/v....php?tid=65678

its about to be dyno;d with the 1776 but the setup on a stock 1600 was putting down 82hp at the wheel so that 100% power increase

should be good for around 105-110
ive bought 2 SC12s and one SC14 since all under $250AU

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