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if you are referring to the N14 with N18 swap, it was not a lot of work. Swap the engine and harness. add two wires to the plug that goes inside the car, marry the ecu to the car, code the CAS to remove N14 and add N18 engine codes.
hello bro
i have 08 mini cooper with n12 engine
i bought n14 engine i want to swap it on luckily i dont have to deal with the oil pump other then n14 ecu what do i need as wiring to get the swap started
hello bro
i have 08 mini cooper with n12 engine
i bought n14 engine i want to swap it on luckily i dont have to deal with the oil pump other then n14 ecu what do i need as wiring to get the swap started
Thank you
wiring wise, you need the cooling fan wiring harness as shown in the above posts. you also need the engine wiring harness of the N14. You might have to replace the radiator shroud OR custom fit the inter cooler. in my case, I used a nose from a 2011. the radiator bracket might have to be modified or replaced depending on the charge pipe you use going to the throttle body.
As I mentioned before, the ECU will need to be paired to the immobilizer. I also used newtis.info to rewire the body side plug of the ECU. I think the were two wires needed relocating and one added for the stage 2 cooling.
Currently in the consideration phase, I have found a few mid-mile JCW N18 engines here in Aus, also apparently you would need to replace the bonnet as the hood scoop actually does cool the turbo, even though it's a dummy scoop, and also that the DMS would not recognise some of the readings from the engine, and possibly CAS and ECU troubleshooting. Are the tranny and engine mounts the same however? I would think they are
Used JCW engines seem to go for around $4-7K AUD which is like 3-5k USD
Cheers,
Hey, I'm also in Aus and wondering if you managed to get this working? Only N18 I've found near me is from a Countryman. I can grab the trans from it as well as I'm trying to get this into a base R56, but not sure I can get the CAS and DME to work with this. Also not sure if I can use the front end from the Countryman or if I'll need to find that part from another R56.
I wanted to start this topic in case someone out there is thinking about other options about their N12 or N16 engine.
In the previous series found here, I got the project done with success. I stopped short of marrying the N18 ECU to the N14 CAS because I decided to rebuild that engine and swap it back, I also was not able to economically have them married.
In this series, I will be reusing the N18 on an N12 Hardtop. For this combo, I will try to copy the old ISN and write it to the N18 ECU.
I will be updating this first post (#1) so members don't have to scroll or miss anything and the subsequent posts will be for comments, inputs, and update notifications.
Car: 2007 R56 Base with N12 Engine and Automatic Transmission
Prepping - Day 1
Prepping continues...
I used newtis.info to create this spreadsheet to map out the pin assignment. Color matching means swapping wires from N12 to N18. This is only on the body side connecter leaving the ECU.
N12 1-stage cooling fan
N18 2-stage cooling fan
Some more work done...this is starting to take shape
A bit more over the weekend..
Saturday (02/01/2020) was the day
Installed the turbo and rear plumbing. installed the front nose (from a Cooper S) wiring for the S cooling fan. I could've spliced the wires but having this harness make the job cleaner. adding stage 2 cooling fan power left: new wiring to the rad fan. Right: old connector. rad fan main power line rad fan ground plug to modify adding stage 2 cooling fan signal to N18 ECU Adding stage 2 cooling fan relay rewiring the ECU body side plug leaving the original fan plug on the side and connecting the new one to the new fan
Took the mini for a 50 miles test drive. other than suspension and exhaust noise, the car was fast and responsive. Some of the things I need to work out are at idle it sounds like it has a minor vacuum leak and as you notice my speed is 73 at 2900 rpm. My N14 was 80 at 2700 rpm.
So I want to do this with my base mini cooper it has an N16 and I was just wondering 2 things1. how much was the ballpark cost of it and 2.Did u keep the stock transmission bc I have a manual transmission would it be fine if I put an N18 engine or would I have to get a transmission from an S?
All of these parts were already available from minis I acquired over the years including the engine. check car-part.com for rough estimates, but I would say maybe 3500 +/- 500. I kept the N12 auto transmission but if this were a permanent swap, I would also swap the transmission to match the power and necessary gear ratios.
01-20-2020, 07:34 PM
