dry slick

[57m]

Hi the question is would dropping the lr rear spring rate from a 250 to a 225 would this help tighten up the car to drive straighter in the dry slick and if not what adjustments would you recomend to tighten the car enough to drive straighter. Thanks

[Matt49]

Hi the question is would dropping the lr rear spring rate from a 250 to a 225 would this help tighten up the car to drive straighter in the dry slick and if not what adjustments would you recomend to tighten the car enough to drive straighter. Thanks

Lowering LR spring rate will free your car off the gas and tighten your car on the gas.
The trick to being fast in the slick is getting the car to turn without sliding the rear tires. That is accomplished a number of different ways and when I figure it all out, nobody on here is going to hear about it from me :-)

[MasterSbilt_Racer]

Hi the question is would dropping the lr rear spring rate from a 250 to a 225 would this help tighten up the car to drive straighter in the dry slick and if not what adjustments would you recomend to tighten the car enough to drive straighter. Thanks

That is the million dollar question. Less lr spring rate may help your instant bite off the corner because your dynamic ride height will be higher if you are on the bars. You might just need more static wedge. Your RR might be trailed too far and you might be chasing the rear up the track. You might have a car that basically handles well but you light the tires up with the gas pedal. These things are complicated.

[hatchet]

But a softer lr spring will tighten the car up on enter off the gas . Off the gas the rr will plant the tire to the track so the front end will go up the track .

[MasterSbilt_Racer]

But a softer lr spring will tighten the car up on enter off the gas . Off the gas the rr will plant the tire to the track so the front end will go up the track .

You and Matt can both be right. That is why memorizing a cheat sheet for adjustments will have you wrong about half the time these days. We are not all on mono leafs, always riding on springs anymore.

If the car is sitting on the lr spring, you are right. If the car is more supported by the bars and momentum of the chassis, Matt is correct because the lr is higher and roll steered more as a result.

[hatchet]

If you are off the spring and let off the gas which rear tire will have the most weight on the tire ?

[hatchet]

If you are off lr the spring and let off the gas which rear tire will have the most weight on the tire ?

[57m]

The right rear would get more weight

[MasterSbilt_Racer]

If the car is accelerating laterally, the rf is really pinned, the lr won't settle down. Spring doesn't matter. I have seen cars with no lr coilover win. Only struggled on restarts.

[Matt49]

Spring rate on a beam axle (like what we have in a late model) also has an effect on roll center location...just saying.