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Need to know angle of front subframe
https://www.ausmini.com/forums/viewtopic.php?f=5&t=52835		 Page 1 of 1
Author:  Mearcat [ Sun May 03, 2009 6:38 pm ]
Post subject:  Need to know angle of front subframe
I am about to weld up a jig for the FRONT subframe to sit in but am unsure on angles/levels. I measured the front-to-rear angle of the subframe while it was in the car (with engine in) but the cones in the car were old and very compressed (and the height of the car on left vs right was ~10-15mm difference so don't really trust those measurements).

Based on this top left pic in the image below (out of the workshop manual), it shows the front subframe with the towers not vertical, but the main section in front of the towers kind of is.

Before I start cutting/welding the jig, I need to know what part of the front subframe should be level (vertically or horizontally) so that the subframe will be bolted into the jib exactly the same level & orientation as it was bolted into the mini. The idea is to get the (4EFTE Starlet) engine to be installed in the subframe.

Edit : I have measured the subframe and it's square so it hasn't received a front end push in it's life.

-Alan

Image
Author:  Mearcat [ Wed May 13, 2009 12:07 pm ]
Post subject: 
Well - for the benefit of the greater good, I'll post what I've found. There isn't really any definitive reference points to replicate the front-to-rear angles/level of the subframe while it's out of the car.

However the front bar of the subframe and the "wings" at the back of the subframe provide a pretty base line to go by. As long as the front "C" bar at the front of the subframe is near enough vertical, and the rear subframe mounting point "wings" are horizontal (in line with floorpan), then the level of the subframe will sit as per is would normally do when in the car.

I didn't take a photo of the subrame & jig from the side but I'm confident it's pretty damn close. Oh and the towers actually lean BACK a few degrees but haven't measured it see exactly how much.

http://1.bp.blogspot.com/_rP8rUqK1m3Q/SgbYj66FhmI/AAAAAAAAAGk/pyuFBYHNWHQ/s1600-h/IMG_1336.jpg

http://1.bp.blogspot.com/_rP8rUqK1m3Q/SgbYj82t_oI/AAAAAAAAAGs/1bmwMjDKbpA/s1600-h/IMG_1337.jpg
Author:  mad-mk1 [ Wed May 13, 2009 2:19 pm ]
Post subject: 
just a suggestion,

if it was me, i would get an old or spare, possibly even the frame your planning on using,

stick the frame in the car that it will be staying in, tack some "feet" onto the frame, so when the cars at natural ride height the frame is sitting on the legs , then remove the frame from the car, and hey presto, amke a jig to hold the frame square in the position that the legs hold it, and your frame is sitting level?......
Author:  Mearcat [ Wed May 13, 2009 3:07 pm ]
Post subject: 
I have two subframes (and am using the non-spare one at the moment), but as I said in the first post, the rubber cones in the car are old, compressed and uneven so I can't trust the taking any level measurements of the subframe when it's in the car. If I knew the cones were new and even heights all round, it would have been easy to take measurements.

Good idea on the "feet" though :)
Author:  TheMiniMan [ Wed May 13, 2009 3:33 pm ]
Post subject: 
a protractor would do the job no???
Author:  Mearcat [ Wed May 13, 2009 3:40 pm ]
Post subject: 
TheMiniMan wrote:
a protractor would do the job no???

Yeah - I will see if I can find my old one, dust it off and measure the subframe tower angle now that the jig has been finished. I have a steel ruler/protractor in the workshop ... somewhere.
Author:  Mearcat [ Thu May 14, 2009 10:54 pm ]
Post subject: 
Mearcat wrote:
Yeah - I will see if I can find my old one, dust it off and measure the subframe tower angle now that the jig has been finished. I have a steel ruler/protractor in the workshop ... somewhere.


Okay I have measured the subframes angles and when viewing at teh subframe from the side, the towers lean BACK from the horizontal plane approx 6 degrees. Even the other subframe (still in the car with engine installed) is about 5 degrees.
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