04-01-2021, 08:13 PM | #46 |
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Steering feel improves with Michelins in lower profile, slightly wider sizes.
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04-02-2021, 08:00 AM | #47 | |
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04-02-2021, 02:14 PM | #48 | |
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But, the issue is the EPS system— not the tires. The i3 kinda has some feel (still not great) because it barely needs any power steering assist— crazy narrow tires on a crazy light car (BEV i3 is 500-800 lbs lighter than the i8, depending on the year/options of each). |
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04-03-2021, 12:24 PM | #49 | |
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I would equate “feel” with a better connection of the car to the road regardless of the EPS. The tires still transfer a different feel to the driver when width is increased. Vehicles generally benefit from an increase in tire width. Using a wider size while maintaining the same overall diameter is known as “plus-zero” sizing. It results in a wider contact patch which provides better lateral grip, more grip on hard braking, and less vehicle roll in corners. Last edited by Coastali8; 04-03-2021 at 12:33 PM.. |
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04-04-2021, 06:26 PM | #50 |
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Skinny narrow tires chosen for Eco do not -> feel.
Michelin PS4s are better rubber. The steering is a tad 'heavier' with wider sizes, but 'feel' is improved as long as unsprung weight is not increased. Part of the steering and handling feel of the i8 stems from the superb stiff chassis. It is not a Lotus super-7 nor even a Cayman S, but the steering is very precise for AWD. IMO the LCI is much improved from earlier versions, particularly in sport mode. Weight reduction helps.
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04-05-2021, 06:31 AM | #51 | ||
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Please explain how wider tires result in less vehicle roll in corners— never heard that one before... Quote:
The i8 steering is absolutely precise and accurate, no argument there. It’s only feel where it sucks. Weight reduction is the best mod for every car |
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04-05-2021, 08:57 AM | #52 | |
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04-08-2021, 09:31 PM | #53 |
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Tire Rack did some informative testing of cornering grip with different tire sizes. Gist of the results is slight increases in tire width with reduced profile do increase cornering g. But suspension/handling design is complex, and increasing tire width more than one size does not improve grip.
"Feel"? Not sure how to measure that. Not a fan of go-kart every pebble in the road 'feel'. What I enjoy is informative feedback from the steering wheel that helps me get closer to the perfect lap. I want the tires to talk to me. IMO, my i8 is better than my previous M3 in that regard.
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04-09-2021, 09:38 AM | #54 | |
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04-09-2021, 02:46 PM | #55 |
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I believe you if your previous M3s were F8Xs. :P
(also EPS, but wider tires and heavier car)
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04-09-2021, 09:42 PM | #56 |
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We have been drifting a bit off topic here... but a few more thoughts. 'Grip' depends on friction between tire rubber and road. More tire contact patch can increase grip up to a point - e.g., wider tires slide more easily on ice. All things being equal, if tires on the outer side of a curve have more grip, the car will lean more, higher g.
And yes, we are comparing recent (F80) M3s. Discussing which M3 had best steering feel and handling deserves a pitcher of really good cold beer. I would love to have a pristine E36. I still miss my 2002tii...
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04-09-2021, 09:53 PM | #57 |
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Mine is a daily driver
Most simply, it's more efficient than a Prius when I want it to be. In comfort mode, I can waft to work in a blend of gas and electric. And while not a rocket off the line, on the highway, this car is a killer. Passing power is never and issue. And, when I want it to be, it can transform into a very quick, yet still very comfortable Gran Turing car.
No other car can meet all of these demands so stylishly. I love mine and don't see anything close to the design brief right now except for the very spendy McLaren Artura.
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04-10-2021, 08:54 PM | #58 | |
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04-11-2021, 04:08 PM | #59 | |
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That said, if you look at the physics equation for the force of fiction: F=μN (verify here: https://sciencing.com/calculate-forc...n-6454395.html ) Translated: (Force of friction) = (coefficient of friction) X (normal force) Further translated: (Tire grip) = (tire compound) x (weight of car) Obviously a heavier car also places more load on the car under cornering, so making a car heavier doesn't make it grip better. But, that is why downforce works so well-- increasing the grip without increasing the cornering load. Wider tires do worse on snow because they make it easer to effectively hydroplane (on the snow)-- the wider (but shorter) contact patch means more snow has to be displaced or driven on top of.
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04-13-2021, 01:42 PM | #60 |
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I have driven every M3. Not sure why you say the i8 is WAY worse. I prefer the steering feel of the i8 to all M3s from the E90 on. I prefer it to a C4 Porsche 996. Every Audi and MB that I have driven. If I were giving out grades, it would get an A-/B+. It is arguably one of the best steering AWDs on the road.
But I don't know of any 'objective' measures of steering feel, so to each their own.
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04-14-2021, 01:34 AM | #61 |
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I am pulling the trigger on the 199 mile (collector car) i8 Roadster at Hubbard Motors, Scottsdale, AZ in the morning. I have two Lamborghini Diablos, so not new to this segment, just looking for any advice on i8's. Thanks KHLAMBO
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04-14-2021, 09:30 AM | #62 |
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Curious what was the purchase price as I am on the fence on buying back my car.
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04-14-2021, 08:43 PM | #63 |
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Welcome! Get some track time in with my nephew at AMP...
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04-15-2021, 12:22 AM | #64 |
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04-15-2021, 12:29 PM | #66 |
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Congrats..Awesome color combination. I have a feeling the LCI cars my not do too bad. They will depreciate, but my guess would be they settle at 70k - 75k form coupes more for the roadster and non-LCI coupes around $60k - $65k.
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