Eyesore Racing's handling secrets revealed! (Page 1 of 2)

This is what we did with our e28 528e Shark.  Got junkyard springs front and back set from a V12 740iL, cut them down, put them in a press, heated them with a torch to bend the end  flat and squeeze in the circumference to fit the perch.  Super stiff.

RUSSIAN TRANSLATOR, PLEASE!!!!
Dirty Eyesore Pro Racer Guys!!!!
Cherry Pickers. 

Trust me... there are no mis-calculations with the eyesore Miata.  Dave is umm... REALLY good at this.

It's almost like you do this for a living

Indeed, if you rely solely on calculations, you'll likely end up with crap. Less likely than if you do it blindly, though.

What didn't get stated all that clearly in the story (because eventually you have to stop typing and push the publish button or nothing will ever get done), is that you all this calculating has to be backed up with testing.

We cut the springs at least 1/4-coil longer than calculated for our first try, and we made that adjustable rear bar out of our old front bar so we could try some different assumptions. Turns our our first assumption was pretty good, though.

-Dave

Sparky Pete, where are you getting the Russian from?

-Dave

Looks Greek to me.

(Bablefish)

I agree 100% with the cutting springs technique....its what we did on the Estate....we never tested the actual spring rates, but it sure feels stiff to me...I think stock 928 front springs are around 300lbs....so 450lbs is possible using the +50% math (remember stock 928's are 3500lbs)

All 928's come with adjustable coil overs stock....with threaded perches....so we had to tighten up the collars quite a bit on the estate....the hard part is one of the collars was frozen to the shock body...we literally had to cut it off.....then weld it back together....whats even more surprising is it STILL WORKS.....we adjusted it the other day!!  :>) 

I also concur with RAISING RIDE HEIGHT....when we 1st cut the springs the Estate was SLAMMED to the bump stops and the suspension was far to harsh....every time we raised it the suspension got better and better and so did the handling...less abrupt and more controlled.....the bummer is our old springs sag during the race...so we have to tighten them up after every race....eventually we will run out of adjustment :>(  But there is plenty for at least a few more races

I didn't notice it as much at Sears, since its a smoother track than Thunderhill....but you can really feel the difference there since there are bumps mid corner than can really upset the car if its too low....

(poor) Greek to English translation from Google:

The end result is horrific elegant. The gap between the end cuts of the last coil and the spring perch is the 0.75 inches that adds Bilstein perch height in our spring. The gap between the spring perch and minimum coil in the left, is one of many small errors in our calculation. We calculated the percentage of spring as the whole gang was inactive. The clear, only about 2 / 3 of the lowest coil is inactive in full decline. As the spring compresses more and more that the last coil will hit the bass will go dead, giving us a somewhat progressive rate spring, and at a lower level than we calculated round.

Team Eyesore is human after all and they are passable!!! lol

http://www.youtube.com/watch?v=wUOHGtlbhPM

It was about an hour maybe hour and half into Sundays session.

Eyesore doesn't win because they have the fastest car.......they win because they have the fastest RELIABLE car that doesn't get black flags.......................................................

I'm sure plenty of teams pass Eyesore during the weekend.....just to loose tons of laps during flags-repairs-penalties......

Its simple....a well driven reliable car thats fast "enough".....