[Johan422]

Quote: Originally Posted by Kumho Kid (original)

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

Yea, +1 --- I was just looking at the exchange rate and it's like a $1.98.

Still Like the idea of a screw style charger...someday

[alski]

i think when you look at the cost of a jcw kit at 210hp thats got to be good value

[chuntington101]

Quote: Originally Posted by MINIMANIAUK (original)

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 !!

from the pic there seems that you "could" fit a larger supercharger if needed. could this be a possiable option later?? is there actually any room to do this?? also is there anything offerd by the Opcon group that could maybe deliver 400bhp??

thanks Chris.

PS. great prodcut and nice pricing to!

[MINIMANIAUK]

Bigger is not always better , sledgehammer engineering , yes there is room for a larger charger but to what end ? 400 or 500 bhp just become numbers ,good for MAX POWER mags and the bar
three times the standard output which is already supercharged would cost an absolute fortune,just how many cars do you know can have their stock output tripled?
To raise the output from 163/170 to 275 is an absolutely astonishing result and to push on to 325 reach double the factory output !!!!
Having very large bhp at very high rpm does not reflect how a car performs as a road car , with 280/300 in such a small light car as the MINI is more than enough , sub 13 sec quarter miles is a match for just about any car made and at £50000 less than most 13 sec cars
To go higher power is folly , to go faster start stripping the car for less weight ......far cheaper

But if you want bigger I am up for it !! please send £50000 deposit!!

[Johan422]

Any updates??

[MINIMANIAUK]

Various combinations are now being tested,throttle size, (now 70mm ) pulley size ,(now smaller), various bypass valve arrangements, injector sizes. -each alteration gives important information on boost levels /temps ,throttle response,belt lengths,fuelling .
Each pulley size alteration causes a change in boost pressure ,and until you run that size pulley the boost level is unknown ,
The pulley is bolt on so an easy job to replace,no puller is required ,it can be done with engine in its mounts ,not needing lifting,just 1 bolt and tighten to 30ftlb , and a new belt .
Back on Dyno next week ,and see what the output is raised to .

[MINI-Morgan]

Sounds good Keep us updated with how the Dyno goes next week

Certainly seems there is a massive amount of different in the power required to drive this supercharger compared to the Eaten. Producing 16Psi would be nice

[Loui]

Quote: Originally Posted by MINIMANIAUK (original)

Various combinations are now being tested,throttle size, (now 70mm ) pulley size ,(now smaller), various bypass valve arrangements, injector sizes. -each alteration gives important information on boost levels /temps ,throttle response,belt lengths,fuelling .
Each pulley size alteration causes a change in boost pressure ,and until you run that size pulley the boost level is unknown ,
The pulley is bolt on so an easy job to replace,no puller is required ,it can be done with engine in its mounts ,not needing lifting,just 1 bolt and tighten to 30ftlb , and a new belt .
Back on Dyno next week ,and see what the output is raised to .

Good luck with it Adam im sure it will make good power

[Bhozar]

I wont be at the BMW show, so will miss you running on the strip. You still going to the MINI Action Day at Combe? Would be good to see it run around the track.

[roland2003]

Hi Adam, did you ever try fitting the vacuum guage before the TB but after the filter ?( Clean side of the air filter) to see if the filter was restricting (stretching the air) rather than the TB. What size filter are you using? Hope you can make it on the track at the Castle Combe Mini action day on Sat 29th Sept.

[chuntington101]

Quote: Originally Posted by roland2003 (original)

Hi Adam, did you ever try fitting the vacuum guage before the TB but after the filter ?( Clean side of the air filter) to see if the filter was restricting (stretching the air) rather than the TB. What size filter are you using? Hope you can make it on the track at the Castle Combe Mini action day on Sat 29th Sept.

a great idea!!! could also try and fit one after the TB and see if the TB is big enough??

Chris.

[Revolution Mini Works]

any word on the Opcon?

[Paul Webster]

Looks like you've got to make more than 250whp at 7k Adam otherwise you wont here the last off it.

[MINIMANIAUK]

Only 250whp - no worries , no funky gearbox on the charger ,or silly high rpms too

[GTT 280]

will we ever see the opcon merge into the GTT kits?

The GTT kit i already have fitted to my car is top grade workmanship. It more than meets my needs....... but woldn't it be nice to add just that little extra refinement?... )

I'm sure i asked this before Roland, and i think we both agreed its more than just a bolt on activity.

Cheers,
K.

[Revolution Mini Works]

Quote: Originally Posted by MINIMANIAUK (original)

Only 250whp - no worries , no funky gearbox on the charger ,or silly high rpms too

250whp was only at 7k..... not to mention it WASN'T even tuned..........

funky gearbox? HUH???????????????

[Revolution Mini Works]

Quote: Originally Posted by 1320autos (original)

Looks like you've got to make more than 250whp at 7k Adam otherwise you wont here the last off it.

Bueller?

[Penguinracer]

Adam, is your conversion using the standard head? There seems to be a great deal of misinformation about the limitations of the standard head. Can your conversion deliver 260 - 275 bhp (flywheel) with the standard head? It is often said, correctly or incorrectly, that about 240 bhp is the limit with the standard head using the Eaton. Your more efficient charger may be producing lower intake temperatures & thereby delivering greater power with the standard head through greater intake density. My question is this: With a pullied Eaton blower (15%, 17% or 19%) which is the weaker link in generating more power - the charger's inability to deliver enough air or the head's ability to ingest & exhaust the mixture? I often felt that a pullied Eaton runs out of puff (& loses thermal efficiency) well before the standard head hits its limits?

[MINIMANIAUK]

the gains with the conversion are around 20+ by using less power to drive,and 20+ by having cooler more dense air at the same boost levels, these gains increase as the boost level is increased ,and charger rpm increased,. -so a 220 eaton conversion would see 260 with opcon at the same boost.
if stock head limit is circa 240 then 280 would be the opcon equivalent.
head and eaton charger work against each other ie the heads flow restriction ,causes the boost pressure to be higher and thus causing the eaton to enter a far less efficient area when pullied.
The eaton does not like going much over 13 psi , it will do it ,but starts to lose efficiency,the stock head adds 2-3 psi by restriction,this varies through the rpm range ,at the lower rpms ,cam,valves, dictate the airflow,at the higher rpms the exhaust valves and manifold dictate the airflow.

[MINIMANIAUK]

UPDATE
After many hours trying various combinations,I have now fitted a revised intake to the charger and a smaller pulley ,also removed the extra injectors and moved to 450cc to replace the stock ones.
the intake size and length make a large change to the operation of the charger and move both boost output and rpm that the boost comes in at ,torque seems to have increased a lot and moved slightly higher up the rev range.
Reliability has not been a problem the charger has worked faultlessly,so early in the new year its back to the dyno to get some more numbers.
I feel the present set up is about right for a road use car ,plenty of power and nice and linear,
Not having the extra injectors/control unit also will reduce costs
Tried very large throttle -far too snappy and throws up too many EML issues (race use only -and would need a standalone ECU )
Could a smaller pulley be fitted? -yes but I feel the extra torque would be unnecessary its already at the traction limit and any more would become a handfull to drive and need a revised traction control system.
I will try to get some in gear accelleration times as soon as the roads dry out -I cant get grip at the moment
As the current superchargers clock up higher mileage and start to fail,this would be a reasonable alternative for an upgrade as a bolt on kit especially if I can reduce prices further still