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#3319449 - 03/21/14 10:30 PM Re: Better gas mileage with stiffer suspension. [Re: Nayov]
eljefino Offline


Registered: 06/15/03
Posts: 28637
Loc: ME
The tire theory of setting to not-too-high a PSI is the tire pushes back against the road after it goes over a pebble. Stiffening the tire interferes with that. It stands to reason that stiff shocks might too.

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#3319597 - 03/22/14 09:01 AM Re: Better gas mileage with stiffer suspension. [Re: Nayov]
whip Offline


Registered: 03/03/05
Posts: 2201
Loc: ohio
Originally Posted By: Nayov
Originally Posted By: Trajan

A shock absorber is a mechanical device designed to smooth out or damp shock impulse, and dissipate kinetic energy.

Nothing more. Nothing less.


Yes, but I would add that dissipated energy (heat) is wasted and it costs fuel, but I do concede that the amount is in all probability immeasurable.

Until you can convert the energy from the bump into a way to propel the vehicle, it has zero effect on the fuel economy. Buying a lighter car would help more than anything.
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#3320122 - 03/22/14 07:13 PM Re: Better gas mileage with stiffer suspension. [Re: eljefino]
Nayov Offline


Registered: 08/01/09
Posts: 814
Loc: ME
Originally Posted By: eljefino
The tire theory of setting to not-too-high a PSI is the tire pushes back against the road after it goes over a pebble. Stiffening the tire interferes with that. It stands to reason that stiff shocks might too.


Fascinating. I always thought the harder the tire the better for MPG, but, this makes sense. He's to hoping my gas mileage won't be plummeting with my sporty stiff struts. whistle

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#3320138 - 03/22/14 07:26 PM Re: Better gas mileage with stiffer suspension. [Re: Nayov]
Eddie Offline


Registered: 12/07/03
Posts: 7833
Loc: Florida, Cape Coral
If you make force vs distance diagram you'd see that what you gain is easly lost in the noise. Ed
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#3320221 - 03/22/14 08:42 PM Re: Better gas mileage with stiffer suspension. [Re: Nayov]
jeepman3071 Offline


Registered: 04/15/10
Posts: 2152
Loc: Storrs, Connecticut
The money you save in gas with stiffer shocks will probably not be enough to cover your doctor bills from back problems down the road.
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#3329346 - 03/31/14 04:22 PM Re: Better gas mileage with stiffer suspension. [Re: Merkava_4]
Trajan Offline


Registered: 07/16/05
Posts: 3730
Loc: SE PA
Originally Posted By: Merkava_4
The more you keep the car in a straight line, the better the fuel mileage will be.

A car getting tossed around from stiff suspension is going to affect its straight line.


Shocks and springs are not powered by the engine, nor is any energy from them used to move forward.
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