lowering spring question??

[CL65 Captain]

More rake = more oversteer.

Less rake = more understeer.

The NSX should have anywhere from 1/8" to 1/2" of rake to handle properly.

Opposite. If you raise the rear, it puts more weight on the rear and less oversteer.

[Honcho]

Opposite. If you raise the rear, it puts more weight on the rear and less oversteer.

Doh! Thanks, Jim.

So by eliminating the rear "gap" to the front, you are creating a twitchy, unsafe car that is apt to spin out?

[CL65 Captain]

Doh! Thanks, Jim.

So by eliminating the rear "gap" to the front, you are creating a twitchy, unsafe car that is apt to spin out?

It's relative to how hard you are going to drive and the rest of your suspension setup. But yes, the car would be looser mid turn if there was no rake. As well, the rake produces "some" rear dowforce or more like reduction of lift.

Think of it like a table. If the back two legs are slightly longer, then more of the weight is supported by those legs.

However, what people don't understand is there are many aspects that effect handling at the limits including driving style. For example, my car had bad oversteer at turn in but I was balancing it by using throttle to shift weight to the rear after turn in and mid corner. This slowed my corner speed.

[Honcho]

I hope you are coming to XPO- I could use some tips on setup:

BC BR Coils 10/8
RM Racing Sways 19mm front and rear
Yokohama ES100 215/40/17 and 275/40/17
I am probably going to go with 4mm total toe on rears and 1/2" rake.

It's relative to how hard you are going to drive and the rest of your suspension setup. But yes, the car would be looser mid turn if there was no rake. As well, the rake produces "some" rear dowforce or more like reduction of lift.

Think of it like a table. If the back two legs are slightly longer, then more of the weight is supported by those legs.

However, what people don't understand is there are many aspects that effect handling at the limits including driving style. For example, my car had bad oversteer at turn in but I was balancing it by using throttle to shift weight to the rear after turn in and mid corner. This slowed my corner speed.

[Hapa88]

Opposite. If you raise the rear, it puts more weight on the rear and less oversteer.

It's relative to how hard you are going to drive and the rest of your suspension setup. But yes, the car would be looser mid turn if there was no rake. As well, the rake produces "some" rear dowforce or more like reduction of lift.

Think of it like a table. If the back two legs are slightly longer, then more of the weight is supported by those legs.

However, what people don't understand is there are many aspects that effect handling at the limits including driving style. For example, my car had bad oversteer at turn in but I was balancing it by using throttle to shift weight to the rear after turn in and mid corner. This slowed my corner speed.

I'm pretty sure that Honcho had it right in that raising the rear height of a car will move the weight forward, therefore reducing weight over the rear tires and INCREASING the weight & grip on the front tires. This will cause an Oversteer effect on the car. Note that this is exactly what happens when you brake hard (front suspension compresses and the rear expands).

Here's a suspension tuning guide (see section 16)
http://www3.sympatico.ca/cbarnett/SetupMatrix.html

See this guide as well taken from "Performance Handling" by Don Alexander
http://www.westpennmazdaclub.com/fil...ng%20Guide.pdf

Corner entry oversteer: FIX - Rear shocks are too soft in rebound. Rear ride height is too high (too much rake) compared to front.

With your table example, you have it backwards. Assume the legs themselves have no weight and one side becomes so long that the table is tilted, eventually all weight will reside on the shorter legs.