Drivers Pack and Suspension/Tyre Choices

[Phaeton91]

Speaking with one of the Lotus engineers at a launch, there appears to be far more to it than just stiffer parts.  For example the increased camber angles on sport are optimised for a) going round lots of corners at high G, b) responsiveness to directional changes and c, Cup 2 tyres.  I overlay this by saying that if the predominance of  use is on road then  a) compromises contact patch and b) compromises straight line stability and c) compromises any driving below 10 degrees.
 

So take a trip to the Nurburgring as an example.  500 miles there of which 400 at least are long straight roads - maybe 20 laps (c200 miles) on a circuit full of bumps and crests and then 500 straight miles back.  I think i  would opt touring as I’m sure my driving skill would be the limiting factor here, not the choice of suspension.

Take an NC500 trip.  Same issues maybe even more so.

Granted, if I’m going to hammer lap after lap around Bedford Autodrome then sport would be the one but my horizons are a bit broader than that for this car.

incidentally, when I suggested to the engineer that the touring suspension might be soft enough to generate roll I was almost met with a “roll” of the eyes and received the expression - it’s a Lotus.  It will handle whichever - choice you go for. 
 

I’m still undecided though.

Edited November 19, 2021 by Phaeton91

[mg4lotus]

Looking at the head on skeleton line drawing there are two types of tyres, fat ones and skinny ones. I would guess the fat ones are the cup 2s and the skinny ones are the Good Years. Happy for someone to correct me if I'm wrong with that.

The skinny tyres are sitting higher than the fat ones. I'm presuming this is the difference between Sport setup and Touring setup. Again, happy to be corrected if I'm wrong.

If the skinny tyres are sitting higher in the drawing then the car will be closer to the ground. I would have thought the Sport setup would have fatter tyres and sit closer to the ground. Alternatively, if the suspension travel is shorter on the Sport causing the tyres to sit higher and the car to sit lower then I would have thought the fatter tyres would be higher and the skinny tyres lower.

Confusing. Are the skinny tyres winter tyres? Why would the ride height be different?

 

[KJD]

Front and rear tyres. Different sizes.

[mg4lotus]

Ah! I thought with the rim size being the same that the tyre size would also be the same. Cheers Kieran.

[JimH]

https://news.goodyear.eu/en/goodyear-develops-a-unique-eagle-f1-supersport-for-the-new-lotus-emira-uk/

Goodyear tyres sizes here - no reason to suspect that Cup 2's will be different sizes to these...

[TomE]

Tyre sizes are 245/35/20 front and 295/30/20 rear for both Eagle F1s and Cup 2s.  Ride height is the same for both Touring and Sports suspensions.  Camber is increased on Sports.

[Phaeton91]

Agreed. The tyre sizes can be seen (with great effort) on the drawings.

Do you think camber will be fixed on touring/sport - or do you think it will be adjustable?

[Whitey]

Camber will be adjustable, as it is on the Evora - probably by the same method - ie from the wishbone bolts which use a cam type arrangement and can change both Camber and Castor angles.

[Phaeton91]

Hi.  Does anyone know the suspension set up on the test car in this vid? https://www.thelotusforums.com/latest-news/lotus-cars-news/emira-v6-fe-gets-dynamic-shakedown-test-at-hethel-with-gavan-kershaw/amp/