BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > Various 1-series questions
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      07-12-2015, 11:21 AM   #1
ovekvam
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Various 1-series questions

Anybody have a 1 series car with 3 cylinder engine and manual gearbox? I am wondering if it rev matches automatically, like the FWD cars with that engine.

With the M-Sport brakes, how small wheels is it possible to fit?

On the newer cars with pressure sensors in the wheels, what happens if you install a wheel set without sensors, is it possible to drive without restrictions?
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      07-12-2015, 12:00 PM   #2
eray
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I've test driven a 218i with ZF transmission.
the engine revs up real good between 1500-3500. after that it is a bit dead let's say.
however, it sounds amazing. much better than 4 cylinder turbo engines.
On the prototype testing videos of the 3 cylinder engine you can see that it can reach up to 170 hp and more which makes me think that the B38 engine has a serious hidden power in it waiting to be unleashed.

About M-Sport brakes, you'll be needing 17" or more.
When you install a set without sensors, the tyre pressure warnings will pop-up of course but you will be fine.
There are a lot of people who hate run-flat tires here, and they are using regular wheels with non rft tires. Haven't heard any problems so far
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      07-12-2015, 12:21 PM   #3
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Quote:
Originally Posted by eray View Post
I've test driven a 218i with ZF transmission.
the engine revs up real good between 1500-3500. after that it is a bit dead let's say.
however, it sounds amazing. much better than 4 cylinder turbo engines.
On the prototype testing videos of the 3 cylinder engine you can see that it can reach up to 170 hp and more which makes me think that the B38 engine has a serious hidden power in it waiting to be unleashed.
Yes, I also drove the 218i Active Tourer and the Mini, but I haven't had the opportunity to test drive a 3 cylinder F20/F21. I don't know if the RWD gearbox has gear selection sensors.

The B38 with some electric modifications is putting out around 230 hp in the i8.

Quote:
Originally Posted by eray View Post
About M-Sport brakes, you'll be needing 17" or more.
When you install a set without sensors, the tyre pressure warnings will pop-up of course but you will be fine.
There are a lot of people who hate run-flat tires here, and they are using regular wheels with non rft tires. Haven't heard any problems so far
Thanks. I also don't like runflats, and buying two sets of new original runflat wheels and replacing the tyres will be very expensive.
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      07-13-2015, 11:19 AM   #4
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Quote:
Originally Posted by eray View Post
About M-Sport brakes, you'll be needing 17" or more.
With non-OEM 17" some care should be taken: http://f20.1addicts.com/forums/showt...0#post13117040 (the rim is three posts above there).

Quote:
Originally Posted by ovekvam View Post
I also don't like runflats
Then you don't seem to like BMW other than true ///M anymore: it looks like runflats are (suggested) mandatory otherwise.

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Originally Posted by ovekvam View Post
buying two sets of new original runflat wheels and replacing the tyres will be very expensive.
Why two? Aren't the rims available standalone?
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      07-13-2015, 12:45 PM   #5
ovekvam
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Quote:
Originally Posted by No one View Post
Then you don't seem to like BMW other than true ///M anymore: it looks like runflats are (suggested) mandatory otherwise.
It can be debated if the M135i is a true ///M.
And even if runflats are mandatory when you buy the car, it doesn't mean it is mandatory to drive around on them.

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Originally Posted by No one View Post
Why two? Aren't the rims available standalone?
I don't know. Maybe they are.
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      07-13-2015, 12:55 PM   #6
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Quote:
Originally Posted by ovekvam View Post
It can be debated if the M135i is a true ///M.
My point was M135i were on runflats now too. It does appear so.
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      07-13-2015, 01:25 PM   #7
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Quote:
Originally Posted by No one View Post
My point was M135i were on runflats now too. It does appear so.
I wonder where all the runflats end up, because everybody I know replace them with normal tyres. Maybe a big pile at the dealer backyard? Or they deliver all the new cars with the same set of tyres, and just wait for the customers to get something else, so they can reuse them one more time?
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      07-13-2015, 01:58 PM   #8
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Quote:
Originally Posted by No one View Post
My point was M135i were on runflats now too. It does appear so.
RFT's remain no cost option but seems now for lci you to specify nRFT's if you want MPSS's implying RFT are the default. Shame as MPSS's are great as std fit to pre-lci M135i.
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      07-13-2015, 05:43 PM   #9
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Quote:
Originally Posted by Bee Pee View Post
RFT's remain no cost option
Yes, it looks they do, I just don't consider M135i so I missed that , my conclusion was based on BMW wheel configurator.

I had a small puncture recently and had to decide if I'd like to go for non-RFT Michelin Sport "whatever" they put on M135i and everybody here praised so hard in case of replacement. I have no issue with RFT and I did appreciate I had to do nothing to reach my home to research about probable replacement and then the tyre shop where they luckily just repaired it (at 10% of the replacement cost ): only half the pressure was lost so I guess it's all right now.
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      07-13-2015, 06:28 PM   #10
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Quote:
Originally Posted by No one View Post
only half the pressure was lost
Actually, it was about 1 bar which is roughly 1 atmosphere (thus it could be exactly nothing in fact ). Yet, the manometer did show the pressure making me believe it wasn't so bad and there was some compressed air preserved by the RFT technology and preserving the RFT empty run resource in return. I might have been wrong.
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      07-14-2015, 01:30 AM   #11
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Rev matching is on my 116d LCI which if I am not mistaken is a 1.5l 3 cylinder.
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      07-14-2015, 01:35 AM   #12
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Quote:
Originally Posted by No one View Post
Actually, it was about 1 bar which is roughly 1 atmosphere (thus it could be exactly nothing in fact ). Yet, the manometer did show the pressure making me believe it wasn't so bad and there was some compressed air preserved by the RFT technology and preserving the RFT empty run resource in return. I might have been wrong.
There is a difference between absolute and relative pressure. The tyre pressure sensors measure relative pressure, so 1 bar indicated, means 1 bar more than ambient air pressure.
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      07-14-2015, 03:58 AM   #13
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Quote:
Originally Posted by ovekvam View Post
There is a difference between absolute and relative pressure. The tyre pressure sensors measure relative pressure, so 1 bar indicated, means 1 bar more than ambient air pressure.
Yes, I finally leaned to the same interpretation too, recalling how the manometer worked (the school is so far behind! ). Thanks for the confirmation!
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      07-14-2015, 10:14 AM   #14
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Friend of mine drove a manual 1-series 3cilinder and it revmatches.
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