318 Ci Remap
Posted 12 September 2010 - 09:06 PM
i am new to this site so please bare with me. i have recently purchased a 2005 318ci m sport. to be honest i was fairly gutted i didnt go for a bigger engined e46 as i very quickly found the 318 very gutless especially around town and lower in the revs. My dad, being a bmw owner for many years suggested maybe getting a remap and recommended BWTUNUNG in hounslow just outside london. I was un sure as i had heard that the normally aspirated engines were hard to get big gains from so was it really worth the money it would cost? I phoned BWTUNING anyway and spoke to jason, he was very informative and convinced me that i would definately benifit from the remap. With this i was booked in and travelled to there workshop. I was offered different options fore the remap and in the end went for more lower end power and better fuel economy. I was taken out once the remap was done by jason and was pleasently surprised with how it felt on the drive, immedietly it felt smoother around town and more responsive. when i drove it it did feel different, it is far from being a fast car but is a real improvement and no longer feels a chore to drive, i feel it was definately money well spent. Also on the drive back home i drove it fairly hard on the motor way, and the fuel economy was actually better then the journey up when i was taking it easy! So to anyone with a 318 and thinking of a remap i would say as long as your not expecting miricals, the remap has definately improved my driving experience with a smoother ride, improved throttle response and better fuel economy. I hope this has been informative for you.
Posted 12 September 2010 - 09:13 PM
Posted 12 September 2010 - 09:26 PM
he charged me 250 as my dad had used him before but im sure this would be the normal price?
that aint a bad price dude, only thing is ppl might be bit weary why you remapped a 318, might think u thrash it
Posted 12 September 2010 - 09:29 PM
And yes good first post
The amount you paid is about the going rate .
There's a couple of Forum Sponsors that do it cheaper , especially at Bmw Meets etc .
Posted 12 September 2010 - 09:37 PM
Posted 12 September 2010 - 09:40 PM
looking forward to attending some of the BMW meets
Posted 12 September 2010 - 09:41 PM
Posted 12 September 2010 - 09:47 PM
Posted 12 September 2010 - 09:50 PM
Posted 12 September 2010 - 09:51 PM
well glad to know that i wasnt overcharged!
looking forward to attending some of the BMW meets
BIG meet this Weekend Dude @ Santa Pod !
Posted 12 September 2010 - 09:54 PM
Posted 12 September 2010 - 09:56 PM
Think I will have to sort one out then, I got told by a mate that does re-mapping where he works that on the 318 it can add around 15 bhp and 30lbs in tourqe but will save 10-12% mpg. Is this about right?
PM CNL Colin, his maps are worth their weight in Gold n hes a top bloke, I ll vouch for that
Posted 12 September 2010 - 09:58 PM
Posted 12 September 2010 - 10:14 PM
Posted 09 January 2012 - 01:23 PM
Posted 09 January 2012 - 07:20 PM
Posted 10 January 2012 - 02:44 PM
is this for the N42 2.0 16v engine or the 1.9 M43 8v? 2005 is the 2.0 isn't it? I've got an M43 1.9 and have just had a the cam reprofiled and it has made a noticeable difference from 3k to the red line. the benefit of a single camshaft engine I guess is that the reprofile cost me half what a remap would cost and changing the cam will actually allow the engine to take more air and therefore fuel and get rid of the exhaust quicker. The limitation with remapping an NA engine is this physical limitation. If you are interested in getting a bit more power from the 318 it may be a good way to go, i have no idea about cam profiles for the 16v engine and how much there is to gain but the M43 is pretty lazy compared to 1.9 litre 8v 4 pots from other manufacturers such as peugeot use in the 205 GTI so I just went up to the durations that those engines have or can be tuned to. I haven't done many miles in it but all seems well at the moment.
I have a N46B20 138 bhp, 4 cylinder.... which option would you recoomend, remapping or cam reprofiled.
Posted 10 January 2012 - 06:34 PM
so unless you can change some of these things the gains available will be very limited (and a remap on an naturally aspirated engine doesn't change these physical limitations). On cars with turbos (such as diesels) the turbo can be 'told' to put more air into the cylinders by remapping (since it is responsible for compressing the air prior to it being shoved in for burning (the suck bit - although i guess its more of a blow than a suck, but you get the idea), this is why you get significant gains in these engines from a remap, i.e. you are actually getting a significantly larger amount of air into the engine.
To get a non-turbo engine to develop a noticeable increase in power you need to make a physical change to allow it to do this, increasing the cam duration and/or increasing valve lift allows the engine to get more in and out and therefore develop more power. However there is a trade off as the power is not increased throughout the rev range but instead just a portion of it.
Apart from very common engines for tuning there seems to be a very limited amount of info about cam profiles so you need to have a look about if you're serious about it.
I read a thread on edition38 about a guy with a 1.6 engine in a 106 which was developing 180 or so brake which isn't bad but like i said you might want to undertand your engine a bit really before going down that route.
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