i was reading about bicicles and rear suspension on the more expensive ones, they where saything that bikes with no rear suspension(hard tails) get the most traction (mostly need for going up hill), all the modern bikes they had soaked up traction and power when going up hill, except for one made my Giant that used a different approach to the geometry of suspension and allowed the bike to dig the back tire in the ground the more you put power into the pedals , what i am getting at is that would having not rear suspension give you more tracting? and also, i don't know about all the different suspension systems, but why don't companies design someting like the company above, it seems most cars have the springs connected staight to the axle, the only exception i can think of is the indy car types

 

You just described anti-squat suspension. Most RWD vehicles have some anti-squat; drag cars may have tons of it.

Basically anti-squat uses the reaction of the wheel drive torque to force the drive wheels onto the pavement. The pavement doesn't move down much, so the result is the chassis (body) lifts.

Anti-dive braking geometry at the front is a similar effect: it helps prevent "brake dive". If anti-squat was 100%, the rear end wouldn't drop at all during acceleration. If it were more than 100%, the rear end would rise. Watch the clearance between the top of the rear tire and the wheelwell cutout when various drag cars launch. If the gap increases, anti-squat is well over 100%.

With a torque arm suspension anti-squat is determined by a combination of torque arm front mounting height and torque arm length. It's a little more complex, but diagrams would be needed to explain it well.

 

I think the discussion has its merits.
Over here we indeed do race on regular streets in an orderly fashion more then you guys do i believe,and let´s just once and for all state that getting a car to hook on unprepped tarmac is a whole new ballgame compared to doing so at the track.

Close friend runs one of the worlds fastest true streetdriven syclones.Runs mid to low 10;s on radial tires.
Even the AWD runs up against a wall traction wise at that point-on regular streets that is.

 

I still would like to know what a vehicle (tire-driven) is capable of pulling in the 60'...

 

Top fuel dragsters do 60' in ~0.85sec. Limited by traction, not hp. My friends blown alcohol hemi has ~1/3 the hp of a nitro car and runs ~0.95sec.

Rich Krause

 

Yea, but tire construction and compounding will get better as will clutch engagement management and they'll be able to apply more power faster.