Lotus Elan

How to make your Elan handle

PostPost by: bitsobrits » Wed Jul 27, 2016 1:07 am

Now this is something I've never seen before, and certainly have never thought about doing. Some creative person in the past of my latest Elan project apparently thought they needed to increase the roll stiffness in the front end. So they fastened an extra ARB to the original with a few hose clamps, and hey presto!

Not sure how you would calculate the increase in stiffness with "stacked" bars.
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Steve

Elan S1 1963-Bourne bodied
Elan S3 1967 FHC pre airflow

Formerly:
Elan S1 1964
Elan S3 1966 FHC pre airflow
Elan S3 1967 FHC airflow
Elan S4 1969 FHC
Europa S2 1970
Esprit S2 1979
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PostPost by: pharriso » Wed Jul 27, 2016 1:21 am

They sawed off the ends of the "auxiliary " bar... Oh my...
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PostPost by: el-saturn » Wed Jul 27, 2016 5:14 am

.................calculating this "invention" DOES require quite a bit of guess work - movement/flex all over the place: for those who don't know: roll bars are 7/8inch BUT ALSO available in :lol: 1 inch: that's what i'm using and maybe even lighter BUT also stiffer without any doubts! sandy
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PostPost by: john.p.clegg » Wed Jul 27, 2016 7:53 am

Look what someone did to mine...

2014_0318enginein0009.jpg and



John :wink:
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PostPost by: Spyder fan » Wed Jul 27, 2016 8:34 am

john.p.clegg wrote:Look what someone did to mine...



John :wink:


Not sure from that photo, but I'm a bit rusty on original bits = maybe, removed the non removable cross member, fitted an alternator, and a gear reduction starter? Or maybe forgot to put oil in the engine (no drips :shock: ).
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PostPost by: Grizzly » Wed Jul 27, 2016 9:03 am

Whats more surprising is the cheesy Jubilee clips haven't fallen to bits the first time it went round a corner.... Maybe the Anti roll bar modification (and i use the word Modification very loosely) was done about the time the engine came out?

Just looking at the damage to the front of the Chassis maybe that bar was put there as some protection? looks like the last owner liked to do a bit of off roading.


BTW nice S1 in the background ;)
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PostPost by: lotusfan » Wed Jul 27, 2016 9:51 am

[quote="john.p.clegg"]Look what someone did to mine...

No oil filter?
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PostPost by: rgh0 » Wed Jul 27, 2016 10:10 am

Putting a second bar in parallel I have seen done a number of times on racing MGBs and Midgets / Sprites and other cars where the bar is visible. It works and should not be dismissed totally as bad practice. Its all in the details of how its done and this example has a few issues as commented upon.

With modern tyres the Elan handling benefits from increased front roll stiffness so a bigger bar or doubled bar is a useful modification

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Rohan
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PostPost by: john.p.clegg » Wed Jul 27, 2016 11:07 am

No,no,no ....you've all missed it,the anti-roll bar has an increased diameter between the hangers....

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PostPost by: rgh0 » Wed Jul 27, 2016 11:23 am

Hi John
An interesting way to get a stiffer roll bar and again a perfectly good solution if done right . Personally I think its easier to get a thicker bar made and modify the drop links to hold it.

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PostPost by: pereirac » Thu Jul 28, 2016 11:30 am

Some the 'usual suspects' do sell uprated roll bars ...
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PostPost by: stevebroad » Sun Jul 31, 2016 1:33 pm

I, or rather my suspension guru, has decided to do away with the ARB and control matters with properly designed dampers, springs and droop limiters.

The proof etc.....:-)
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PostPost by: bitsobrits » Sun Jul 31, 2016 9:05 pm

Interesting that a "guru" would deem an ARB superfluous. All rear race cars and high performance street cars use them. And they've been in use on prosaic passenger cars since at least the late 1930's because they reduce/limit body roll without adding undue stiffness.

I imagine you CAN limit body roll with springs and dampers, but it would be so god-awful stiff you wouldn't want to drive it on the street.

But I'm not a "guru", so what do I know.
Steve

Elan S1 1963-Bourne bodied
Elan S3 1967 FHC pre airflow

Formerly:
Elan S1 1964
Elan S3 1966 FHC pre airflow
Elan S3 1967 FHC airflow
Elan S4 1969 FHC
Europa S2 1970
Esprit S2 1979
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PostPost by: stevebroad » Sun Jul 31, 2016 10:28 pm

Agreed, they do. However, they are often a crude device used to compensate for inadequacies in the suspension.

I had planned to fit a rear ARB and got as far as designing and making it, including installing fixings in the chassis and on the bottom wishbone. I have left these in place for now, just in case :-)
Last edited by stevebroad on Mon Aug 01, 2016 8:25 am, edited 1 time in total.
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PostPost by: nomad » Mon Aug 01, 2016 3:05 am

The added bar doesn't appear to be Elan so most likely a U pull bar. One has to hand it to the guy for frugality! :)

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