Roof chop mini - Page 11 - North American Motoring


European MINIs European MINIs may look similar but there are some interesting differences. Learn more here!

Roof chop mini

Reply
 
 
 
Thread Tools Search this Thread
  #251  
Old 12-05-2016, 06:17 AM
Staggs's Avatar
Staggs Staggs is offline
1st Gear
 
Join Date: Feb 2013
Location: New Jersey
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
C'mon that is the most awesome thing! Holy crap that is cool! You're absolutely amazing.
Reply With Quote
  #252  
Old 01-10-2017, 07:20 PM
Camyman Camyman is offline
2nd Gear
 
Join Date: Apr 2016
Location: Salt Lake City, UT
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
Any updates?!?!
Reply With Quote
  #253  
Old 01-31-2017, 12:23 PM
rkde rkde is offline
2nd Gear
Thread Starter
 
Join Date: Jul 2012
Posts: 109
Thanks: 0
Thanked 1 Time in 1 Post
Nothing really worth repeating as it would happen. I have been working on the beetle and not had too much time on the mini however, I have also been doing a lot of little jobs to make it all a little nicer.

Made a mount for the coolant pump, this isn't the finished piece but it is a strap mount pump bracket using an AC idle pulley with a bracket welded to it. Very strong and will do the job nicely



Then added the radiator



Some pump information;

I have had some time to sit and play with the pump properly and managed to get the vipec controlling correctly based on rpm and temperature to give good control.

The water pump is a CWA200 from a BMW 118 and has the following specification;
* Pump duty point Q=7000 l/h / H=0,45 bar
* Ambient temperature -40°C ... +140°C
* Coolant temperature -40°C ... +128°C
* Voltage supply min. 10 V max. 18 V
* Power consumption P1 200 W
* nominal Current 16 A
* Quiescent current 6000 h
* Interface PWM
* Enclosure IP 67

If you wish to control using the vipec use the GP PWM and you will need to setup a control duty cycle too to give a good control. Using the Vipec I have had to add extra wires to the unit to control a relay and have an aux pwm for the water pump

The PWM frequency is 45Hz to 1100Hz

PWM operation is relatively typical
* 1~7% = Uncontrollable default to max speed
* 7~13% = 0 speed motor stopped
* 13~85% = 13% Minimum speed, 85 is maximum speed linear clime in rpm
* 85~99% = maximum speed

There is a tolerance of 1% so ideally a minimum speed would be 15% and maximum is fine at 85%, if you wish to stop the pump pick something like 10% to be far enough away from uncontrollable and minimum speed.

If you wish to only run the pump at maximum the you can run at 100% PWM which is technically just 12vDC

Running the pump at 100rpm makes filling the coolant system super easy as the header tank becomes a vacuum so as long as you can fill it fast enough you will be fine else it will suck air through once primed. The pump at 100% can just about open the thermostat which is less than ideal however you would not normally be running 100% unless you need to up the cooling and hence the thermostat would be open. (it only just opens as you can hear it fluttering)

I planned to sort out the pump and realised whilst its all working it is all backwards?? this must be a vipec output as my digital pwm creator is working as you would expect. So I have sat in front of the car with my stethoscope on the rear of the pump and a clamp meter on the supply.

I can confirm it is backwards and not quite as above unless you are using a PWM module not a vipec or alternative ECU

10% = max speed
15% ~ 89% = speed control where 89% is as slow as the pump can go
90% ~ 100% = off

I suppose this is because the ECU is pulling low on PWM rather than high which would help to explain what is going on. So in summary it all works however I now need to adjust my table as the pump was getting slower as rpm and temperature rose...

Got all this sorted and the pump is working great, I added some interesting control logic into the ECU, a line which says if the temperature is above 50c then use the duty table or if the rpm is above 500rpm then use the duty table, this does mean I can now run the water pump with the engine basically off in an over heat function or at idle the pump could go up to full speed as the temperature rises. Clearly I will need to do some testing to be sure I have the table right but this will be my starting point



Other than that I have started to install my android head unit



hoping to have some time to finish items off but I am driven to put it on the road and drive it for a while - I like a project but I am a little fed up with it only being worked on and never driven
Reply With Quote
  #254  
Old 01-31-2017, 01:27 PM
MiniRoadstah's Avatar
MiniRoadstah MiniRoadstah is offline
5th Gear
 
Join Date: Nov 2015
Location: "Glacial" Maine, USA
Posts: 915
Thanks: 0
Thanked 0 Times in 0 Posts
Driving this project of yours on the road is obviously the ultimate goal. Please let us see it. Hang in there. We're all pulling (pushing?) for completion. It is still an amazing work of mechanical motoring art. Certainly the emphasis there is on the work portion you have put into this.
Reply With Quote
  #255  
Old 03-23-2017, 09:25 PM
Zephyr1 Zephyr1 is offline
3rd Gear
 
Join Date: Dec 2013
Posts: 270
Thanks: 0
Thanked 0 Times in 0 Posts
Reply With Quote
  #256  
Old 05-06-2017, 01:59 PM
rkde rkde is offline
2nd Gear
Thread Starter
 
Join Date: Jul 2012
Posts: 109
Thanks: 0
Thanked 1 Time in 1 Post
So I'll be honest and say I have hardly touched nor seen the chop. I've been so busy with the other cars I put this on the side but I am at it again. I need to finish it but I am finding it so hard now its been so long.

This is whats been consuming my time;



Getting this little classic back on the road which needed a whole lot of work



OK so last week I decided to rip all the interior out, I was't happy with it and this is one reason I keep putting the car off, some items I have purchased or had done in the past just frustrates me as the level of work is not where I wanted it to be or what I would have done. Also I know I could do better... Had the rear panels all flocked in a dark grey to keep it looking semi stock, I got another set of Orranje GP panels and made them fit around the cage and then trimmed them better than I did last time. I also managed to find a set of other GP rear panel covers which cover the parcel shelf catch and cover the rear seat clip hole which looks very nice


Then got an android head unit and installed it - that was quite easy

Then using one of my other minis I had my fellow bodyshop guy make me a new R56 front bumper with some differences - really happy with the outcome and I am now making another mould and who knows I may sell them one day...

Not sure what is next but I am trying hard to get this f**ker back on the road - I've said to the wife I will finish it and the beetle in the next couple of months...
Reply With Quote
  #257  
Old 05-08-2017, 02:06 PM
rkde rkde is offline
2nd Gear
Thread Starter
 
Join Date: Jul 2012
Posts: 109
Thanks: 0
Thanked 1 Time in 1 Post
I managed to get the interior in (with exception to the B pillar trim, mirror switch & foot well lights ) I am really pleased with the outcome this time



Sadly some will have to come out because my last work I did created an electrical fault. When removing lots of wires and adding wires to the BCU I connected the blue insert from the white connector into the blue housing and the blue insert from the blue housing into the white... Gives some interesting faults, the headlights put the interior lights on, the hazards open the boot, the heater turns the wipers on. Eeeek - well as soon as I saw it I knew what I had done so tomorrow I will have to sort that then it's on to the list and get the other bits done
Reply With Quote
  #258  
Old 05-10-2017, 08:40 PM
MiniRoadstah's Avatar
MiniRoadstah MiniRoadstah is offline
5th Gear
 
Join Date: Nov 2015
Location: "Glacial" Maine, USA
Posts: 915
Thanks: 0
Thanked 0 Times in 0 Posts
Project upon projects. Nice ones too, but must say I love the work on the chopped Mini best so far. Interior is top notch. Keep at it!
Reply With Quote
  #259  
Old 05-30-2017, 11:14 AM
David E Holguin's Avatar
David E Holguin David E Holguin is offline
1st Gear
 
Join Date: Oct 2016
Location: Long Beach, CA
Posts: 34
Thanked 0 Times in 0 Posts
Amazing custom work!!
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
MINI F56 RockyMounts Roof Racks ECSTuning Accessory Products 0 08-10-2015 01:35 PM
FS:: MINI F56 RockyMounts Roof Racks ECSTuning Vendor Classifieds 0 08-10-2015 01:33 PM
:: ECS Tuning :: New Items from ECS Tuning ECSTuning Vendor Announcements 0 08-07-2015 08:02 AM
FS:: MINI F55 RockyMounts Roof Racks ECSTuning Vendor Classifieds 0 08-07-2015 07:12 AM
MINI F55 RockyMounts Roof Racks ECSTuning Interior/Exterior Products 0 08-07-2015 07:11 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 06:58 AM.


North American Motoring is an independently operated web site supporting MINI owners and enthusiastsworldwide. As such it has no official relationship with MINI USA, BMW AG, or BMW of North America.All original artwork and design is Copyright © 2002-2004 North American Motoring.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: