MG front subframe positioning - Page 2

Coaster · 11-02-2019, 06:40 PM

Quote:

Originally Posted by 250ptm

is this any help ? basic mini but should provide some clues!

http://www.16vminiclub.com/showthread.php?t=35776 ( "G" tower mounting to subframe)

Thanks for taking the trouble but would only help if I was installing a standard subframe with 10" wheels.

All I was hoping was that someone that had fitted a K series into the front of a mini using a Rover/Metro/MGF subframe could just measure the distance from the top of the rear rail to the underside of the engine bulkhead crossmember. Its just a reference really, I think it needs to be around 4 to 5 inches

AGoaty · 11-02-2019, 08:26 PM

Page 1 of my build shows how the Watson's frame fits.

http://www.16vminiclub.com/showthread.php?t=27565

In particular this picture.

The cross bar against the bulkhead on my frame was too tight. I had to address this with the lump hammer. Once fitted, it's never been any problem.

I would be really difficult to get an accurate measurement with the engine in place but can try if it helps.

Coaster · 11-02-2019, 10:27 PM

No that all good fellas, bottom of the frame level with the bottom of the floor pan is roughly where I thought it should go. Just on with fabricating some new inserts for the crossmember ends so that I have something to bolt the end plates to so wanted confirmation

Cheers

Colin

Oz · 20-02-2019, 08:23 PM

I refitted my Watsons frame to my Mini tonight to get some other measurements so I measured this, my frame was slightly crooked by a few mm end to end but call it 110mm from the top of the rear crossmember to the bottom of the bulkhead crossmember. You probably don't need it any more but I thought I'd post it up just in case it was some help

Artstu · 20-02-2019, 08:45 PM

Also worth noting that the bulkheads aren't dimensionally identical to steel Mini's, certainly the Midas which originally used part of the Mini Marcos in the development phase has a closer distance between engine and bulkhead that requires a shorter than standard Mini engine steady-bar, also the Midas bulkhead (top subframe mount area) is around 1 cm thicker top to bottom than a steel bulkhead.

McCoy391 · 22-02-2019, 04:04 PM

Oz gave some good info on lining the bottom of the frame with the shell and is the best way to set the frame in place. In this position you will notice the wheels are further forward than a standard Mini frame. The amount would be dependant on what wheel size you intend to use. I suggest setting up a wheel, hubs and suspension arms to see how it looks with the front / wings of the shell in place. This will determine if some cutting of the subframe or bulkhead is required.

11-02-2019, 08:26 PM	#17
AGoaty Senior Member Join Date: Oct 2008 Location: Keighley, West Yorkshire Posts: 3,107 Subframe: Watson CC: 1796 Make: Rover ECU: Standard	Page 1 of my build shows how the Watson's frame fits. http://www.16vminiclub.com/showthread.php?t=27565 In particular this picture. The cross bar against the bulkhead on my frame was too tight. I had to address this with the lump hammer. Once fitted, it's never been any problem. I would be really difficult to get an accurate measurement with the engine in place but can try if it helps. __________________ If tha does owt fo nowt, olas do it fo this 'en. Last edited by AGoaty; 11-02-2019 at 08:30 PM.

20-02-2019, 08:23 PM	#19
Oz Senior Member Join Date: Oct 2003 Location: Jersey, Channel Islands Posts: 4,551 Subframe: Other CC: 1595 Make: Honda ECU: DTA	I refitted my Watsons frame to my Mini tonight to get some other measurements so I measured this, my frame was slightly crooked by a few mm end to end but call it 110mm from the top of the rear crossmember to the bottom of the bulkhead crossmember. You probably don't need it any more but I thought I'd post it up just in case it was some help __________________ New subframe fitting has begun - slowly Build Thread - standard length round nose B series with Rover K series frame, will it all fit ??

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11-02-2019, 10:27 PM	#18
Coaster Member Join Date: Aug 2018 Location: spit between London and Norfolk Posts: 81 Subframe: Other CC: 1800 Make: Rover ECU: None yet	No that all good fellas, bottom of the frame level with the bottom of the floor pan is roughly where I thought it should go. Just on with fabricating some new inserts for the crossmember ends so that I have something to bolt the end plates to so wanted confirmation Cheers Colin

20-02-2019, 08:45 PM	#20
Artstu Senior Member Join Date: Apr 2005 Location: Derbyshire Posts: 683 Subframe: Home Made CC: 1275 Make: Other ECU: Nissan Micra	Also worth noting that the bulkheads aren't dimensionally identical to steel Mini's, certainly the Midas which originally used part of the Mini Marcos in the development phase has a closer distance between engine and bulkhead that requires a shorter than standard Mini engine steady-bar, also the Midas bulkhead (top subframe mount area) is around 1 cm thicker top to bottom than a steel bulkhead.

22-02-2019, 04:04 PM	#21
McCoy391 Member Join Date: Jun 2010 Location: Manchester Posts: 80 Subframe: Other CC: 1800cc Make: Rover ECU: standard	Oz gave some good info on lining the bottom of the frame with the shell and is the best way to set the frame in place. In this position you will notice the wheels are further forward than a standard Mini frame. The amount would be dependant on what wheel size you intend to use. I suggest setting up a wheel, hubs and suspension arms to see how it looks with the front / wings of the shell in place. This will determine if some cutting of the subframe or bulkhead is required.