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2010A7 - Silverstone

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Re: 2010A7 - Silverstone

Posted by Zack Litchfield at March 02. 2010
20s? That's crazy.
Yeah, I was talking about the Front Left :P
Anyways, is there any way to combat that and bring it more in to line with the others?
Andy, what front wing are you running? That's effected by balance more than my rear wing by far.

Re: 2010A7 - Silverstone

Posted by Dennis Loyer at March 02. 2010

 There are several things you can do to even out tire temps.

You can reduce the ARB setting. This is often accompanied by either a corresponding reduction in the ARB setting at the opposite end, an increased spring rate at the same end, a decreased spring rate at the opposite end, or a combination of all three.

We've also experimented a little with adjusting the ride height at each corner, with the hotter tire slightly higher than the cooler tire...making sure the rears remain slightly higher overall than the front of course. I'm not sure exactly why this works, you'd probably have to ask AJ or someone else with a lot more knowledge of the hows and whys of suspensions and setups.

One thing I found really helpful at first was this excel file I found on race2play.com It's basically a series of questions. Your response results in suggestions on changes to make in your setup. I found it very helpful to get a decent baseline setup in a relatively short period of time. I could then focus on the little tweaks needed to really dial in a setup.

race2play has a newer version of this file, it requires a login and password and "phones home" every time you launch it. If I remember correctly, there are some detailed sections that are blocked unless you have a payed account. However, this version was free and works just fine.

 

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Re: 2010A7 - Silverstone

Posted by Zack Litchfield at March 02. 2010
I actually have the fancy newer version you were talking about. It hasn't helped any because it just tells me to use a harder compound. Which I actually have considered doing, but I'm still not sure that would bring the front in line with the back completely. Need to get some testing time in, and stop focusing on trying to catch Anthony lol

Re: 2010A7 - Silverstone

Posted by AJ Weber (Admin) at March 02. 2010

It is called wedge.  NASCAR uses it all the time, although they adjust rear heights instead of front.  With four wheel independent suspension, like we have, you can actually do this in one of two ways.  You can play with heights, like Dennis suggests, to get outright 'three legged table' effect, or you can play with spring rates, to get a similar effect that is more coupled and progressive with loading (so instead of making the FL higher, you can make it softer.  When playing with asymmetry, I prefer the more outright effect of the former.

One clue that this is something to try is when not only is one corner hot, but so is the opposing corner (RR in this case).  This is actually the case for me at SS88.

On a road course there is a lot of nasty side effects to this though, like instability under braking, snap oversteer moments, etc, so it usually doesn't pay off on a road course.

Re: 2010A7 - Silverstone

Posted by Andy Jones at March 02. 2010

Previously Zack Litchfield wrote:

20s? That's crazy.
Yeah, I was talking about the Front Left :P
Anyways, is there any way to combat that and bring it more in to line with the others?
Andy, what front wing are you running? That's effected by balance more than my rear wing by far.

I run typically between 0 and +2 for the front wing at lowish RW. Slightly higher difference at higher RW (so I think Laguna is 35 RW, 39 FW)

 

I find the balance varies quite a lot withe CG. Where I usually have for this season (44.1:55.9) the balance changes quite a lot through the race, so for this I expect to start at 15:15 and finish on 17:15

 

 

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