[Penguinracer]

Adam & Roland I look forward to seeing how your respective conversions workout.
My only concern with these conversions is the cost. While both will undoubtedly offer major improvements how much are people prepared to spend on a Mini?
In the 944 world Jon Mitchell will build a big-bore 3.2 litre 500 bhp/500 lb/ft Porsche 944 turbo engine for £10.5k for the engine & piggyback set up plus about £1.6k for a Garrett hybrid ballbearing turbo. For this you're getting a replacement block & crank, wet-liners with ceramic bores, balanced assemblies, carillo rods, Mahle pistons (I think), heads, engine management etc all backed by ex-factory Porsche engineers & a few guys in the F1 industry.
I'd expect any engine work on a Mini to come in a lot cheaper than a basically new 500 bhp Porsche crate motor.
Even if you can pick-up secondhand Cooper S's cheaply, I'm sure cost will be the key factor.

[Revolution Mini Works]

Quote: Originally Posted by Penguinracer (original)

I'd like to see someone experiment with a centrifugal blower on a Mini, a Vortech, Powerdyne or similar. Yes, they are better suited to bigger motors because they don't really alter the normally aspirated engine's torque & power curves, they tend to just give it a parallel shift & the Tritec does really benefit from the boost in bottom - midrange power & torque which the Eaton delivers.

I've seen the characteristics of the various superchargers summarised something like this:

Rootes Type (Eaton) - low efficiency, significant boost to low-midrange power/torque;

Positive displacement (Twin-Screw) - medium efficiency, significant torque/powerboost to mid - higher revs;

Centrifugal - high efficiency, pushes out torque & power at the top end.

It's interesting what the Porsche 928 community are doing with centrifugal blowers :

Supercharged 928 and Performance Porsche 928s

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Admittedly the standard Porsche V8 has big power & torque & it really doesn't need additional torque down low, unlike a Mini. It would still be interesting to see development of a centrifugal blower on a Mini with the appropriate tuning of the brerathing & fueling.

We are doing tuning on the Rotrex s/c and should have the data shortly. The car has put 3,000mi on the stock ecu with no issues.

[MINIMANIAUK]

DYNO TODAY AT 1320 AUTOS
At last got onto the rollers at Pauls , and I am very pleased with the results despite having the too small 58mm throttle fitted and smaller intake the Opcon made 260bhp and it will make the required 300 bhp with ease
The fuel needs mapping as it is out and this will only improve the numbers
as an indication the max boost was only 15psi ,despite this only 10 degree shift in intake temp from idle to max rpm so a lot more to come
10 psi boost at 2000 rpm !!!! (more than Eaton at max)so very very good low torque will result ,torque held up to over 6500 rpm and will extend further up with correct throttle
I fully expect to get to 325 bhp in my own car .maybe more!!
As a bonus it looks like a 275 option needs less components for a kit and will be cheaper than first reckoned
After so much theorising its nice to see the theory become reality ,I think it will exceed my expectations and perform better than i expected -a true 275 and 300 bhp kit that get 275 +and 300 + on the dyno
every time,hot day ,cold day , any day , and hold torque throughout the rpm range-RESULT!!
Many thanks to Paul and 1320 autos

[Revolution Mini Works]

Quote: Originally Posted by MINIMANIAUK (original)

DYNO TODAY AT 1320 AUTOS
At last got onto the rollers at Pauls , and I am very pleased with the results despite having the too small 58mm throttle fitted and smaller intake the Opcon made 260bhp and it will make the required 300 bhp with ease
The fuel needs mapping as it is out and this will only improve the numbers
as an indication the max boost was only 15psi ,despite this only 10 degree shift in intake temp from idle to max rpm so a lot more to come
10 psi boost at 2000 rpm !!!! (more than Eaton at max)so very very good low torque will result ,torque held up to over 6500 rpm and will extend further up with correct throttle
I fully expect to get to 325 bhp in my own car .maybe more!!
As a bonus it looks like a 275 option needs less components for a kit and will be cheaper than first reckoned
After so much theorising its nice to see the theory become reality ,I think it will exceed my expectations and perform better than i expected -a true 275 and 300 bhp kit that get 275 +and 300 + on the dyno
every time,hot day ,cold day , any day , and hold torque throughout the rpm range-RESULT!!
Many thanks to Paul and 1320 autos

great to hear... what correction factor are you running to get 260bhp?
thanks

[Paul Webster]

It made 225whp in your language Jan but that was at 13psi

It defintley seems to have a lot of potential, our car would be in the 12s with this as it is

The potential is huge

I wonder what 8k @ 24psi with a 200 shot would be like

[Revolution Mini Works]

Quote: Originally Posted by 1320autos (original)

It made 225whp in your language Jan but that was at 13psi

It defintley seems to have a lot of potential, our car would be in the 12s with this as it is

The potential is huge

I wonder what 8k @ 24psi with a 200 shot would be like

sounds great... was their a ported head on the car?

[Paul Webster]

Thomas was right Adam

1000hp Opcon supercharger 1327cc King Racing: Specifications - Top Fuel Bike // Drag Racing

[Paul Webster]

Quote: Originally Posted by Kumho Kid (original)

sounds great... was their a ported head on the car?

Yes but I can only give you the.050 lift number

[MINIMANIAUK]

Before the dyno and numbers become more important than the concept .
It is the on the road performance that is the important thing , how the torque curve is developed , ,throttle response , and a wide power band that pulls to max RPM .
Dynos are great for collating data and getting fuelling correct ,and "seeing" what is happening with the engine
From the first runs carried out I believe whatever mods are carried out using the Eaton it will never equal the Opcon in any aspect of performance
with the power that it is producing at such low boost pressures and more importantly very low temps at the pressures ,it will allow far higher boost with safety -no det- no burnt valves etc
It is still early days and there will be a whole lot of adjustments and combinations to try out ,the s/charger inlets on the Opcon are critical a small variation can add 50 bhp instantly and the inlet I am using is far from adequate (it was a quick temporary fit to get the car running)
A new intake is being fitted and larger TB next week and then we will really see
The pre charger injectors havent been used yet ,this should further increase power
The engine is still on standard injectors and still making good power -there is more to come!!

[MINIMANIAUK]

0-100 IN 1.1SECONDS

[Paul Webster]

Sorry Adam just got carried away with my 10sec track day Miniwith not one bit of lag

[Revolution Mini Works]

Quote: Originally Posted by 1320autos (original)

Yes but I can only give you the.050 lift number

lol...silly brit...
I don't need his flow numbers as I know roughly what the rest of the heads flow

So are you pulling off your Eaton yet?

[Johan422]

This is some cool stuff!!! Someday I'm going to put a twin-screw in my mini for sure! I just need to get cought up on my current projects, between my mini and my truck...I'm getting ready to put a compound turbo'd cummins in my ford truck, should be around 800whp and 1400wtq

[chuntington101]

Quote: Originally Posted by 1320autos (original)

Thomas was right Adam

1000hp Opcon supercharger 1327cc King Racing: Specifications - Top Fuel Bike // Drag Racing

....well if you are going all the way i want to see some tyr and fit one of these to a mini!

Whipple Industries

they are part of the Opcon group to!

might need a 300shot of gas to make enough power to drive the bam supercharger though! lol

Chris.

[MINIMANIAUK]

KIT PRICES-
The basic kit for installation will be around £3995
higher power levels require additional fuelling (injectors)larger throttle body , pulley /belt and a map
(pulley changes £100 with belt )
any existing airflow alterations from stock ie cam/head/manifold -will need a map


All kits will be dyno run with printouts for the Pub and your mates

remapping will be required on all installations due to the stock map being so far out of whack with the new boost /rpm
The basic kit will provide 275-300 and include a throttle body
Install time 1 day approx plus dyno

So who actually wants one ?
PM me if you do

[Johan422]

I don't konw if I missed it somewhere, but you have pics of this unit? Are you mating the charger up to the stock intake horns? Thanks!

[Penguinracer]

Now that sounds like a fair price! I hope you do well.

[MINIMANIAUK]

New inlet horn is part of the kit ,but it connects to the stock intercooler ,so any aftermarket cooler designed as a replacement will also fit- If the conversion proves popular , then a different intake/cooler can be made but cost is going to be an issue with this and ultimately demand.

The bulk of the price is in the charger itself and they have increased in price 30% since I started the kit!!
Much like anything sales wise ,the more sold allows economy of scale and prices can be reduced but until then that is the best I can do .

If you consider the price of some JCW seats,an aerokit and some split rim wheels- I know which I would get more enjoyment from !!

[Damo]

This is really cool! Specially at that price!

[Revolution Mini Works]

Quote: Originally Posted by Damo (original)

This is really cool! Specially at that price!

I need to get Americans to think $8k is cheap