here are a few pics of an Eaton MP45 Supercharger broken down... this is the same supercharger that the GReddy kit uses...

 

and here is one of the coupler...

 

do they make a smaller pulley for this?

 

i have a question how is the power with the sc is it a big change?

 

" have a question how is the power with the sc is it a big change?"

YUP!

 

ok lol like how drastic you think it is what you say it will drop your 1/4 mile time to lol think you will make it down into the 16s?

 

What you realy need to do is find someone near by so you can drive it. I'd say mid 15s are in the ball park. It's the low to mid range that you will notice a BIG difference. A 30 shot for the top & now we're talking ( as long as the EGT is not too high ).
There is some tweaking that needs to be done to get the AFR where you want it for bigger gains but that's another whole thread.......

 

sorry to be late on the reply, as far as pulleys go, i haven't really researched it but as far as a GReddy pulley, the answer is no. mini coopers run a supercharger that is nearly identical, the M45, so their modular systems might work, but i don't know if they run a 5 or 6 rib belt. you could always go to a machine shop and have them fab a pulley if thats what you wanted to do... as far as a power difference, like steve said it is a massive difference. my supercharger obviously isnt on my car right now so i am running NA and it is driving me crazy, i cant pull out into traffic or shoot across the highway like i use to, it sucks. but yeah, anyways...

 

The Mini uses the same style pulley. All the aftermarket pulleys are way too small.
Easy, I'l let you try the OE Mini pulley if you want. On the Mini you are looking at 12.5# boost. Both SCs are MP45s, just a few changes.....

 

if the turbo trade falls through i might just take you up on that ;)

 

I'm warning you now ;) 10# might work but more than that &....... The Mini compression is around 8.5 to 1 & won't run well without at least 91o

 

a local guy here is selling a greddy for 1600 im a try to get it and did youhave to take it and get tunned?

 

no tuning, complete plug and play...

 

what you mean plug and play explain

 

The Mini runs 11.75psi stock, not 12.5. And you need to take into consideration the crank pulley diameter too. This determines the reduction ratio, which controls the speed of the supercharger, which equates to the amount of boost it makes. If teh xB cranck pulley is larger, then you will spin the Mini SC pulley faster that the Mini does and make more boost. Eaton can tel you what size pulley to use to make the boost you want determined by the diameter of your crank pulley.

Yes, I have researched this ALOT! ANd I am not even running a Greddy.

 

12.5 with a stock IC & pulley @ WOT. The boost on this car and 2 others average 12.5. Mabey I missed something, only had the car since new - 03. Boost as well as loss of has been measured many times as well as testing 3 different ICs on a Supreflow to determine core restriction.

Easy - I'll send you a diameter later today. You will need to determine what the ratio will be based on the ( drive ) pulley on the alternator ( = 8 psi @ WOT ).

 

oooo, math, sounds fun looking forward to it actually, im going to go measure the GReddy pulley right now...

 

Math??? Thinking is bad for your. It makes you age faster.
2 9/16 to the top of the groove. Is the Greddy pulley a tight interference fit, never removed 1 ?? The Mini is & needs a puller to remove it.

You have crank to alternator ratio - alternator to SC. If you can figure the reduction % to 2 9/16" we may be able to figure the boost. I do have some data from pulley installs....

 

I don't run a Greddy, someone with one will have to measure the charger pulley and drive pulley. Does the xB kit run off the alternator, or crank?

 

Iowa, Easy & myself both have Greddy SCs on our XBs. I have done 3 XB SC installs 1 Blitz & 2 Greddys, my 05 & a friend's 06. The SC is driven off the alt. with a double pulley - smaller than OE reduction on the alt for power & larger for less bost on the SC.

Coryjames - plug & play refers to the e-manage that is a fuel control piggy back. It uses the ign timing to trigger the FI & righens the AFR as needed. The shortfall is the stock injector. It is a good idea to replace the OE injector with a OE TC injector ( 340 replaces a 280 ) this will shorten the duty cycle, as well as maintain a healthy AFR.......