[Ant FR]

Been speaking with my mates Dad and he has a strange old mini, it really seems to be bits from all over the place, a Hartge head, different pulley, etc anyhow he has been told to try fitting an Opcon Supercharger and you can be looking at nearer 290 Bhp. And on top of that it will only require 20bhp to run it. Now i am a little skeptical. and did search o here but only one post came up from back in 2002. So anyone know what he's been told, Anyone heard similar

I can't see that just a different supercharger is onna boost that much, as surely the problem is not boost levels as M45's already push 18PSi ( which is actually high even comapred with turbo cars) but more along the lines of Flow, ie headwork, cams, intake system etc etc.

Any ideas

[Blusox]

Never seens a twin screw s/c for the mini before, sure its not an original mini?

[Ant FR]

no defo not old, any info from elsewhere

[MINIMANIAUK]

Your mates Dad is correct,the opcon ,will improve the power output and is the charger to have for a variety of reasons ,I have one fitted to my cooper s

[Blusox]

Can you get more details on what s/c the guys was talking about, I'm not aware of any other s/c other than the eaton

[MINIMANIAUK]

So far the superchargers available are
1 the eaton -roots type -pump
2 the rotrex -centrfugal compressor-(turbo but belt driven)
3 the opcon- mine is ,I believe the only one in the world!! -twin screw compressor
4 the larger eaton m62 is being tried but suffers as does the m45

[roland2003]

Adam ...Are you thinking of releasing the Opcon as part of a conversion, or are you still continuing with the M62 project?
Best Regards Roland GTT

[Blusox]

Quote: Originally Posted by MINIMANIAUK (original)

So far the superchargers available are
1 the eaton -roots type -pump
2 the rotrex -centrfugal compressor-(turbo but belt driven)
3 the opcon- mine is ,I believe the only one in the world!! -twin screw compressor
4 the larger eaton m62 is being tried but suffers as does the m45

So how does it perform compared to the stock charger?

[MINIMANIAUK]

Hi Roland ,
The conversion was always with the opcon, I never considered the larger M62 (I think the americans are trying) ,it is by nature (roots) inefficient and simply consumes too much hp . and too many pumping losses,What I am trying to achieve is not so much the bhp gain but monster torque and a torque curve to die for!! -the twin screw does not have an efficiency area or rpm where it works best at like the the rotrex (centrifugal compressor) and matches centrifugal compressors in efficiency terms- clearances are much tighter than the rotors in the eaton and far less losses there too. I expect around 40 degree + drop in temp over the eaton at the same boost and a saving of 20-30 bhp in terms of power to drive it
(so that kinda answers bluesox question)
an interesting google search is the Hartge H50 (M3) they used an opcon in a one off car and created their fastest ever car!! --"wall of torque"
another US company has an opcon on a M3 (e36)as a kit ,makes around 435bhp and the torque curve , well curve is the wrong word -its a flat lineHartge H50 Compressor H50 compressor article
regards Adam

[MINIMANIAUK]

PRESENT-DAY SUPERCHARGING - EXPEDIENCY OR EFFICIENCY? / AJ6 Engineering


A good read -well presented and clears up a few myths about the eaton, anyone considering tuning a cooper s should have a read it explains a bit why the charger does not like being worked too hard ,and why so much heat is generated when trying to do so.
also explains "boost pressure" relative to a supercharged engine -its still missunderstood by owners.
I am working in conjunction with Dennis P at AJ6 superchargers on my car and the conversion,I have had a delay on getting a quality intake fabricated (Graham at GRS has kindly offered to make one for me) but for the time being I shall go with the rubbish one I have to enable testing and get a proper finished one later ,post testing .
I would like to get the car upto Paul at 1320 autos for dyno runs(the MINi world is small isnt it?) and it would give a good comparisson against stock numbers.
The UK is trying to keep pace with our US cousins over the water ,and I sure we will keep up!

[GRSmotorsport]

Quote: Originally Posted by MINIMANIAUK (original)

PRESENT-DAY SUPERCHARGING - EXPEDIENCY OR EFFICIENCY? / AJ6 Engineering

I am working in conjunction with Dennis P at AJ6 superchargers on my car and the conversion,

Ah Denis P, I know of this man, his company is based aprox 5 miles from my house!!! - small world

[Paul Webster]

Quote: Originally Posted by GRSmotorsport (original)

Ah Denis P, I know of this man, his company is based aprox 5 miles from my house!!! - small world

Also known as Mr 6 whose just had his old dragster returned to him last weekend to be restored.

[Paul Webster]

Quote: Originally Posted by MINIMANIAUK (original)

[
I would like to get the car upto Paul at 1320 autos for dyno runs(the MINi world is small isnt it?) and it would give a good comparisson against stock numbers.
The UK is trying to keep pace with our US cousins over the water ,and I sure we will keep up!

Looks like my Mini horsepower record on the dyno isn't going to last long

[GTT 280]

I always understood the S/Charger to be a non-improvement part. It sounds interesting that it may now become viable to replace the S/Charger with a unit that is more efficient and provides a performance increase....

Have not read any articles yet so don't have a techy appreciation, but definately V. interested in the topic if it leads to a modification possibility...

Cheers,
K.

[roland2003]

Nice read

[Blusox]

Quote: Originally Posted by MINIMANIAUK (original)

PRESENT-DAY SUPERCHARGING - EXPEDIENCY OR EFFICIENCY? / AJ6 Engineering

The UK is trying to keep pace with our US cousins over the water ,and I sure we will keep up!

Lets stick two opcons on there then!!

[Ant FR]

So how much is it to do this Opcon spercharger, and is it simply bolt on and map, or is it a lot more than that

[chrisflyer]

Hi,

Roland is this an upgrade you might consider doing to a JCW 210 Auto
And whats the price like compared to the eaton 45 in the above

Thanks
Chris

[Paul Webster]

You'll be able to buy it as a bolt on from Adam at MiniMania shortly, I know I keep saying it but its very exciting times for horsepower hungry Mini owners, the problem could be is that there is to much choice

[MINIMANIAUK]

I am doing a kit which is bolt on ,but it does require a bit of mechanical aptitude,also comes with an electric water pump ,and oil lines ,oil adaptor plate,oil cooler,intake ,injectors x2,control unit,vent lines,belt,charger,charger mounts,wiring loom,water pipes,fuel line ,adaptor ,etc -not looking so simple bolt in is it?
The control unit will be preset but adjustable, the car does not require remapping as there are 2 extra injectors that only work when charger is "on boost "controlled by the control unit, it means "off boost "conditions like idle the car runs as standard . the extra fuelling is only added when boost is above the stock levels at any rpm .
price is tba and not finalised,but as always powerful cars cost ££££££, in more ways than the just kit price - the standard clutch for example would be struggling to cope ,like wise the engine mounts,and driveshafts -we have uprated versions of all these but they all cost,
tyres also will not last long if spirited driving done
If MPG is an issue you really dont want this conversion,6 injectors at full chat on full boost will be hardly "green", off/low boost however would be slightly better than stock due less parastic drag from s/c
My question is what would owners be prepared to pay for such a conversion?