More boost out of cooper s stock supercharger or aftermarket superchargers/turbo kits?

Are there any performance mods available to create more boost pressure for more power?? If so where can I find these products and how much do they cost. Please if there are URL(links) to sites with these products, please post them.

Thank you,
808

 

>>More boost out of cooper s stock supercharger or aftermarket superchargers/turbo kits?
>>
>>Are there any performance mods available to create more boost pressure for more power?? If so where can I find these products and how much do they cost. Please if there are URL(links) to sites with these products, please post them.
>>
>>Thank you,
>>808

I by no means profess to be an authority on Superchargers (I know more about turbos) and there are people here who have FORGOTTEN more about blowers than I've ever known...

But I'm the worlds formost expert on my own opinion.


One thing that I expect to see is a smaller pulley for the S/C. Other than that, I don't know what kinds of stuff you can do; different "gearing" maybe?

I yield to the experts.

 

Turbo would be a nice addition to the cooper S.......... VRRRRRMMM PSHHHH!!!!

hahaha,
808

 

But what I think really has to be asked, is how much boost can this engine take? It already is producing almost 12lbs on a 1.6L 4 banger. It's soo easy to overboost an engine. Then rods, cranks, trannies, pistons, etc start to blow. I'd be more interested in lightening the car up first, and then adding a few mods like an intake, plug wires, and a pulley(s), and possibly a chip to accomadate and transfer that extra power a bit more.
Cheers,

 

Wow 12lbs of boost..... maybe just push it to 1bar (14lbs approx?). 1 bar would be good... might need a blow off valve to have extra control over boost pressures. doesnt minimania sell aftermarket engine internals?, I don't know if they have everything but I think they have some things, but Im not to sure....


:smile: 808

 

http://all4engineers.de/all4engineer.../m07-02-11.pdf

read this before you think about futzing with the engine.

the best i.e. easiest - way to get some more power is through getting stuff in and out of the engine more efficiently. better exhaust/intake then a chip then a cam

 

It wanted me to enter a username and password to access that PDF file...

 

>>It wanted me to enter a username and password to access that PDF file...

I posted this earlier in a different thread, but here goes a repeat:

-----------------------------------------------------------------

Concerning the questions about the underlying details of the MCS engine, I refer you to the technical paper "The Mini Cooper S Powertrain" written by the 4 BMW engineers responsible for the development of the MCS powertrain. It appeared in the Aug.2002 edition of the German automotive engineering journal MTZ.

I had to scrounge quite a bit to find a copy. To make life easier for you, I have temporarily posted it as two PDF documents on my personal FTP site:
ftp://ftp.tac.tc

The first document is 4 pages long and is the English translation of the text of the paper. It lacks all the figures and tables. It can be fetched as:
ftp://ftp.tac.tc/MCS_Powertrain.pdf

The second document is 10 pages long and is the German text. It contains all the pictures and tables missing from the English version:
ftp://ftp.tac.tc/MCS_Powertrain_DL.pdf

My FTP server has a small internet "hose" to the outside world, so please be patient. Let me know if they were of any use -- Tom

 

>>Wow 12lbs of boost..... maybe just push it to 1bar (14lbs approx?). 1 bar would be good... might need a blow off valve to have extra control over boost pressures. doesnt minimania sell aftermarket engine internals?, I don't know if they have everything but I think they have some things, but Im not to sure....
>>
>>
>> :smile: 808

Blow off valves do not control boost. Blow off valves are generally refered to in turbo applications, and are installed to prevent the pressure wave produced when you slam the throttle closed (shifts, decel) from abrubtly slowing down the impeller on the turbo. They compare the pressure before and after the throttle plate and vent when the pressure is greater than 2 psi (in many applications).

There are pressure relief valves for supercharged applications, but they are not refered to as "blow off " valves, in my experience, but are called By-pass valves.


_________________

2003 Mini Cooper S (shared with Barb) | 1992 GMC Typhoon | 1991 GMC Syclone

 

I'm sorry I must have confused my self between blow-off valves and by-pass. But I still think that blow-off valves still control "BOOST"(excess pressure built up when throttle plate is closed) Tell me otherwise please :smile:

But no one answered me yet.. IS THERE ANYWAY TO GET MORE BOOST OUT OF THE MINI COOPER S SUPERCHARGER!?!?!?!?

Exhaust/Intake/Cam/Chip are the first things you should do before adding more boost than stock pressures. But your Chip may not be made for extra boost than stock levels, so wouldn't you have to mod/edit the chip? are there chips out there like this?

Thanks,
808

PS: I may not be making alot of sense right now...

 

>>I'm sorry I must have confused my self between blow-off valves and by-pass. But I still think that blow-off valves still control "BOOST"(excess pressure built up when throttle plate is closed) Tell me otherwise please :smile:
>>
>>But no one answered me yet.. IS THERE ANYWAY TO GET MORE BOOST OUT OF THE MINI COOPER S SUPERCHARGER!?!?!?!?
>>
>>Exhaust/Intake/Cam/Chip are the first things you should do before adding more boost than stock pressures. But your Chip may not be made for extra boost than stock levels, so wouldn't you have to mod/edit the chip? are there chips out there like this?
>>
>>Thanks,
>>808
>>
>>PS: I may not be making alot of sense right now...

 

Wastegates control excess pressure... right?

 

my contention is that what is needed first is to get more boost in the mid-range, say 4-5000 rpm, where the torque curve starts to droop before getting the influence of the building manifold pressure. A 15% pulley speed change would produce the same boost at 4200 (where you need it) that was achieved at 5000 before. It would also produce the rated 14,000 blower rpm at 5800 engine rpm and max out the blower at 16000 at 6800 redline.

it depends on what you want the power for. if you are autox-ing, you won't be sustaining redline for much of the time (maybe a few seconds) (same for "spirited" street or dragstrip) so you would gain the midrange power without risking overheating the blower bearings. and the midrange power would be very useful for autox.

if you are road racing, esp with a close ratio six speed, the engine would be running high in the rpm range most of the time and for more prolonged times...might want to lower the operating redline.

 

>>Wastegates control excess pressure... right?

Wastegates are used in Turbo applications to divert exhaust pressure away from the wheel inside the turbine housing, thus preventing the turbo from spinning faster than is needed to maintain desired boost.