Has anyone thought of or tried this? I was just at Eaton's site and noticed that the M45 and M62 might share the same case. I know that you would have to address the water pump problem. I was thinking that if you got the same boost while spinning the supercharger slower that might have some benefits and flexibility.
I just would like to hear everyones comments.

Tom

 

Hi Tom,
The more boost a supercharger makes at a given rpm, the more power it will require to turn. The Eaton M45 draws around ten less horsepower in the higher part of the Mini Cooper S powerband (14,000-16,000+ blower rpm) than the M62. They are apparently different impellers in an externally identical housing. The M45 is supposed to fit most 2.0-3.0 liter 'passenger car/light truck engines. The M62 is supposed to better suit 2.5-4.0 liter engines. This shows that Eaton feels that to drive the more efficient (vol/rpm only) M62 the engine should be over 2.5 liters. The Mini Cooper S already uses the M45, a supercharger recommended for engines in the 2.0-3.0 liter range when the Mini engine is only a 1.6 liter unit. Only an Eaton rep(and maybe not even he) could tell you if the trade off would be successful for your application. (street, race, autocross...) Matching the pulley size/blower speed to the engine's boost requirements could make a power band that is very impressive on top at the expense of running positive boost a lot more often just to overcome the supercharger's drag. This would hurt fuel economy significantly and may be why the M45 was used. On the other hand, who cares about fuel economy if you get a nice gain in torque and power?
PerfPow
http://www.perfectpowerinc.com

 

The BBR 275hp conversion ditches the M45 altogether. They don't spec which supercharger they replace it with, but good chance it is the M62. I'll have to email them and see if they respond to this question. Is the mounting flange identical in measurement?

If you have a highly modded motor, with ignition upgrades, etc, and you are making much more hp than stock, wouldn't the supercharger horsepower scavenging issue be moot? Doubtful the stock ecu could handle this, tho.

I'll let you know what BBR's response is.

 

The M62 may work and just cause the minor side effects mentioned earlier. It looks like the same case and dimensions as the M45, so not only may mounting not be an issue, but the water pump transfer may be possible too. Even if the power draw is greater with the pulley speed/engine rpm the same, more boost does come at a lower supercharger rpm. We need to contact Eaton tomorrow.
PerfPow

_________________
[img] https://www.northamericanmotoring.co.../esj.thumb.jpg [/img]
SPUD

 

Here is a size comparison of the superchargers.. the M62 is larger and may cause problems..



Thanks
Dan
Pilo Racing

 

 

Interesting.. I am reworking the Eaton Supercharger for a more efficient charge, and giving it the ability to run higher boost with out worrying about adding lots more heat (saving the ceramic coating from chipping as well). I am also working on the head as well. We are working with Special Heat Coatings, and Super Lubricants. We will show some tests once the parts are done. These will be sold witha core charge to help keep the cost down.

Thanks
Dan
Pilo Racing

 

Dan could you answer my question: RE why people say the M45 Eaton is a 5 Generation?

Please..

 

The only reason that I can think of is that it is a custom one for MINI. That being that it has the Water pump Attached and has dfferent attachment points, Different Inlet and Outlet ports as well.

That is all that I can think of.

Thanks
Dan
Pilo Racing

 

>>The only reason that I can think of is that it is a custom one for MINI. That being that it has the Water pump Attached and has dfferent attachment points, Different Inlet and Outlet ports as well.
>>
>>That is all that I can think of.
>>
>>Thanks
>>Dan
>>Pilo Racing
It's a modified 4th generation, made to BMW's specifications, so they call it a 5th Generation. Sounds about right to me. That's the only conclusion I had come to, thanks for clarifying that for me Dan.:smile:

I never realised the Eaton was so expensive. According to this web site a 4th Generation Eaton costs: $2,900 Canadian Dollars = $ 2,224 American Dollars

 

Yea.. That is why most supercharger upgrade kits.. (for other cars) start around 3500 dollars... Most of the cost is the supercharger.

It needs to be made to such high specifications for clearence ad such that makes the price high...

Thanks
Dan
Pilo Racing

 

I've got my Supercharger from my S when the Works Kit was fitted; it was taken out from new. I thought it cost around $1250, now that I know its more than $2,000 I'll have to think hard about the price I'm going to sell it for. I've seen some go on Ebay for maybe $500, that's cheap.

I'd rather keep mine than give it away. I think $1,000 is a fairer price that way both parties gain.

Hum....

 

I paid 450 for the extra one that I picked up. 1000 is the target price that I am going to for a modifier Cooper S Supercharger. I think that 450-500 is a fair price for a "Used" supercharger.

Don't mean to disapoint you though.

Thanks
Dan
Pilo Racing

 

>>I paid 450 for the extra one that I picked up. 1000 is the target price that I am going to for a modifier Cooper S Supercharger. I think that 450-500 is a fair price for a "Used" supercharger.
>>
>>Don't mean to disapoint you though.
>>
>>Thanks
>>Dan
>>Pilo Racing
If I remember right the one you bought had done 1,000miles, mine has done delivery miles at the most. It's practically brand new, so hopefully I can get a bit more.

Even at $1,000 it's less than half the price of a new one, that's some hefty discount. It can also be modified to fit various vehicles, so hopefully has a wide appeal. But at the end of the day it's only worth what someone is willing to pay.

We'll see.

 

The price at the dealer is a little over 1,000.

--
Cheese

 

>>The price at the dealer is a little over 1,000.
>>
>>--
>>Cheese
>>
Looking at this site closer: http://www.capa.com.au/prices_eaton.htm I've noticed it's an Australian Company, so it must be Australian dollars not Canadian as some told me. Still though $2900 Australian Dollars = $2,096 US dollars

http://www.xe.com/ucc/


_________________

 

*eyes MiniPilo*

Hrrmmmmmm supercharger upgrade... *DROOL*

 

>>*eyes MiniPilo*
>>
>>Hrrmmmmmm supercharger upgrade... *DROOL*

Yup.... Should be some interesting stuff. I have Teamed with DPR Racing and will be coming out with new products in the coming months with them for the Mini. The First is the Supercharger and the Head.. then some mre parts after that.

Will let you all know.

Thanks
Dan
Pilo Racing

 

fitted my modded charger this weekend at Helix. Getting an extra 6-8hp; dynoed at Helix before and after, same day. Howls good, puts out 18psi max (previous consistent max was 16psi.)

 

Damn, that's good for another second and a half handicap.

 

Damn, that's good for another second and a half handicap.

 

Damn, that's good for another second and a half handicap.

 

Damn, that's good for another second and a half handicap.

 

Damn, that's good for another second and a half handicap.

 

BBR does not seem to want to give too much away. They ignored my major question... email from them ->

"-----Original Message-----
From: David Brodie [mailto:david@bbrgti.demon.co.uk]
Sent: Monday, November 24, 2003 11:41 AM
To: Mick Lawrence
Subject: RE: supercharger question.


HI Joseph,Yes we use a bigger S/C and with our twin intercooler set up installed, we are averaging inlet temps. Of 25/35C the original Coop S average is 55/80 C!!!

We are taking 275 BHP orders for mid.Jan.2004, can we add you to the list? MICK @ BBR.



-----Original Message-----
From: Mick Lawrence [mailto:mick@bbrgti.demon.co.uk]
Sent: 24 November 2003 09:07
To: David@Local
Subject: FW: supercharger question.





-----Original Message-----
From: ***** ******** ***[mailto:*.***********@***.net]
Sent: Sunday, November 23, 2003 7:40 PM
To: sales@bbrgti.demon.co.uk
Subject: supercharger question.

Hi,



Just a quick question. For your stage 4 conversion, you state that you completely ditch the M45 supercharger. What is the unit that you replace it with? Do you use the M62 from Eaton, or is this sourced from elsewhere? Does the larger supercharger work efficiently enough? Does inlet air temp remain at a stable, low temp?



Appreciate the response. Thankyou in advance.

Joe"

Anyone know which SC they use?