The other thing to consider (in my country at least) would be insurance. I do like the idea of a blown Touring though - could make a great sleeper! Following to hear what the FI experts have to say.

 

I do like the idea of a blown Touring though - could make a great sleeper!

My thoughts exactly. Good point about the insurance I'll look into it thanks.

 

Well perhaps all I needed is this 30 minute video and all is clear. In short the lack of intercooling means high octane fuel in combination with meth injection is needed to prevent misfiring in higher ouside temperatures even as recomended by the original manufacturer of the kit. So a clear no for a daily driven car, a maybe for a track build or project.

 

Not a fan of non-intercooled force induction. I feel like you're not using it at full potential at all.
As for fuel consumption, with those engine temps, I have no idea what to expect.

 

It's a little late - but I have this kit on my 330i. I expect it to be making around 300hp. With the stock 2.93 rear end / 5 speed manual I was seeing up to 26-28 miles per US gal (8.4-9 L/100km) with exclusive highway on a road trip. Around town I would see 21-24mpg (9.8-11.2 L/100km). I now have an M3 rear end with 3.62 ratio - I'm now around 18-21 mpg around town. The reduction in fuel consumption really isn't a deal breaker.

For anyone second guessing the daily drivability - I have put ~10k miles on my supercharger kit since June last year. It has been a great kit. There are heat soak issues sitting in traffic, but I have tracked my car on a cooler day in February and it was a great experience. On a colder day, you really get the "boost weather" effect. I would like to add methanol injection at some point, but that's a rabbit hole I don't want to open as a new tune, new injections, and a smaller pulley will be needed 😅

 

For anyone second guessing the daily drivability - I have put ~10k miles on my supercharger kit since June last year. It has been a great kit. There are heat soak issues sitting in traffic, but I have tracked my car on a cooler day in February and it was a great experience. On a colder day, you really get the "boost weather" effect.

How do the heat soak issues manifest themselves?

 

Basically after sitting in traffic on a hot day, the car will pull timing and it feels like NA in terms of power. It's just because the intake temps are a little toasty. There's not really any driveability issues, you can still accelerate just fine, you will just notice a lack in power if you mash your foot down.

 

Ah, OK, so when it does that you're no worse off than if you hadn't got the supercharger on it? I could live with that.