Lotus Elan

Plus 2 Ride Height Measurement to ‘Closing Plate’

PostPost by: stugilmour » Thu May 02, 2019 4:02 pm

The WSM indicates Plus 2 ride height should be 6 1/2” to the closing plate when setting alignment. Where exactly is said closing plate? Would it be a different item on my Spyder space frame?

At a guess is it the welded rectangular plate at the base of the front towers? If so, they are sloped on my Spyder chassis, so which side I wonder? Of course the front cross member is cylindrical on the the Spyder, but I suppose that could be called a closing plate on the stock frame? Surely they don’t mean the closing plates located in the wheel wells that create the plenum for the side rails?

Just got the alignment checked and adjusted, and the tech mentioned my front spring height is adjustable, and car ideally should be raised in the front. I agree as the front wishbones are definitely not level by about an inch when quickly checked with a spirit level and the alignment sheet shows -2.0/-2.1 negative camber unweighted rather than 0 to +1 degree positive as per spec, weighted. The front looks pretty slammed for sure!

Bonus would be help with my 2” exhaust clearance.

Cheers!

Stu
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39a35eda-21c9-4893-899b-90b314da890b.jpeg and
Chassis illustration courtesy Ray’s most excellent online parts manual at rdent.com.
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1969 Plus 2 Federal LHD
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PostPost by: Foxie » Thu May 02, 2019 11:01 pm

To set my ride height, prior to setting all toe and camber settings, I place the equivalent of my weight in concrete blocks in the driver's seat (my wife doesn't travel in the +2 much these days !) plus say a third full petrol tank. I adjust the springs on each corner to make the lower wishbones horizontal. The adjustments on the driver's side should be a little higher than the passenger side, and approximately equal, to avoid any diagonal bias, in the absence of corner weight scales.

(The as-built camber and rear toe settings on the Spyder chassis were all way out, so I have fitted fully adjustable wishbones all round)

I measure the height of the sill edge at each corner for reference. I may lower the car some more by winding back an equal amount on each corner.

:)
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PostPost by: stugilmour » Fri May 03, 2019 1:49 am

Thanks Foxie. I think I will take a similar approach. How high did the bottom of the side sill lip end up on your car?

Stu
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PostPost by: wotsisname » Fri May 03, 2019 8:49 am

Foxie wrote:(The as-built camber and rear toe settings on the Spyder chassis were all way out, so I have fitted fully adjustable wishbones all round)


I'm interested in this, in particular was the bare chassis assembled to the body prior to drilling & tapping or was this done with the body dropped onto a rolling chassis. I have noted (spyder chassis) that the rear legs flex significantly if you remove the rear strut brace along with the complete suspension, driveshaft ,etc. assembly.
I believe Buckland suggests (on the Elan) fitting the bare chassis, whereas any factory pictures I've seen suggest the rolling chassis... is this where some of the inconsistency arises ,which is considered the correct process and does the wider track of the plus 2 amplify the issue.
Stu, I do apologise if this is a thread drift

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