Found the problem child and it is the crank pulley, so now I need to replace it. I have been wanting to replace the SC pulley but haven't done it yet because I didn't feel like messing with it.

I have been looking at the Crank/SC combo kit from M7 speed, Gen 1 Power Up Kit | Supercharger Overdrive Pulley Kit | 53-3M7700 Does the 16% pulley and 4% crank equal a 17% SC pulley?

What is the general opinion on this set up? anything better out there? It is a weekend driver for fun so don't want to spend a bunch of money. If I want big power I just drive my truck, may not handle but will light all four down the road

Look forward to the info and TIA.

 

There are so many options, but 16% + 4% sounds like too much, and the M7 crank pulley is undampened, which is a hotly debated topic when it comes to crank pulleys and engine wear on the MINI.

Personally, I would go with an ATI "stock" sized pulley, or a PRW fluidgel pulley, both of which are dampened and a 15% supercharger pulley. The PRW is about $100 less than the ATI, and the "stock" ATI is actually about .8% larger than stock.

The 15% SC pulley will take the power to a really fun level for about $200 plus an hour of install time, with no ECU tune required. SC pulley kits including the PULLEY, belt, and colder plugs are available from almost all the NAM vendors.

 

Thanks for the info RB-MINI, i figured the M7 would cause more vibration but don't know how much. The best price I found for the PRW is $260 shipped, once I add the other parts to the deal I am in for $550 and still need plugs/Tensioner tool and some small parts.

Need to see if any of the vendors will do a package deal.

 

16+4 is more like a 19+ or 20%....
Will overdrive the ac compressor and alternator due to the -4% crank pulley...
I would do a max of 17% TOTAL, and not more than a -2% on the crank, or you will need to change the alternator pulley....
A 15% and a 2% is semi common...about the same as the 17%...
And any fool selling the 16% and a 4% in a package should be held libel for problems imo.
Nearly gross incompetence too sell them as a kit.

Many folks tried a 19% reduction...really needed a tune and injectors....but with the crank pulley here...it is beyond that...you need to change the alternator pulley, and maybe the ac compressor pulley.....
Yes...m7 got new owners a few years ago....can you tell?

 

It should be about $550 for everything, including the PRW. Most of the pulley kits are $180-$200 which include the pulley, belt, and plugs. The SC tool, belt tool, crank seal, and crank bolt should be about another $100. You'll also need a crank pulley removal tool. Many have rented one from their local auto parts stores. Just make sure you don't try to use it on the supercharger as it doesn't work.

If your belt tensioner is also bad, check on Amazon for a Gates or Litens tensioner.

 

The M7 pulleys as well as the Alta crank pulleys are notorious for one of two failures: either breaking at the "spokes" of the pulley, or just spinning on the crank.

As was stated, the total "reduction percentage" comes out to just about 19-20% which is out of the compressor map, really only making hot useless air, overdriving components that don't need overdriven, and on top of that the stock injectors are only 330cc so add the pulley kit and a tune and you're nearing 80+ % duty cycle on the injectors.

Stick to the tried and true methods of either a -15% & a +2% crank pulley, or a -17% & 0% crank pulley.

As for the dampening needs, I've run a Craven 2% billet crank pulley for over 30K miles without problem, I did notice a bit more vibrations at idle, but the car also has poly bushings everywhere... We've heard from multiple credible resources that the Tritec operates smooth enough that there was no "real requirement" for a harmonic damper, but was added mostly for passenger comfort.

Rockrunner; we can put together a package deal for less than $550 that is both reliable, credible parts, and everything you need to get the job done.

 

Sounds good, I have been shopping around but would have to buy from three different vendors and prefer just one place. As for the the M7 kit I wasn't sure if the two numbers cancelled each other out so you could run a stock size belt. I would have liked that just in case I ever blow a belt it would be easier to find. I totally agree with not using the M7 kit, don't want to blow up the other parts.

I can call tomorrow and see what all I will need etc.

 

586-792-6464
Or email me direct at nick@detroittuned.com

:Thumbsup:

 

Sounds good, I'll give you guys a call

 

Avoid the M7 parts as we no longer sell them due to numerous issues with fitment and failure.

For a crank pulley you for sure want an ATI damper as it will dampen the best and run/rev smoother.
https://www.waymotorworks.com/super-...ulley-r53.html

If you were set on 16% we have that, but normally just go with our WMW 15% pulley kit that has all you need with no fluff.
https://www.waymotorworks.com/wmw-pulley-package.html