left rear spring

[DANNY]

Since i have to go with a shorter spring does anyone know the installed height on a 16" #125 i want to try to keep some spring on the axle when it gets up but i dont think a 13" will do that... Or theres a good chance that it wont... If not i guess ill go with a 13" #200 or #225

[bushracing67]

how much does that corner of the car weigh ?

[DANNY]

Last scale wheel weights are:

LF- 766
RF- 692
LR- 927
RR- 815

[stock car driver]

Where do you race in vegas I thought the bull ring only ran specials? Im interested in moving there for the warm weather and fun on the lake!

[DANNY]

Its warm alright 110* in the summer lol

https://www.Pahrumpvalleyspeedway.com

Its a 1/4 mile hi bank paper clip

Theres also couple in arizona and northern nevada and tons of great tracks in cali

Once in a blue moon they let us run on the 1/2 mile dirt that they run the duel in the desert on...

[bushracing67]

the way spring rate works is it takes the # rating to compress the spring 1" so..

16" 125: 927# / 125 = 7.416, 16" - 7.416 = installed height 8.584"

another example:

11" 250: 927/250 = 3.708, 11 - 3.08 = installed height 7.92"

[DANNY]

That should work then cus right now i measured the height im sitting at and the rears are at 13" approx sitting there....

[dougwojcik]

The method stated by bush racing will get you pretty close, if you want to be a little more exact measure the compressed height of a spring in the car and multiply the distance compressed by the spring rate to get the weight on the spring. This is the weight that the spring actually "sees" Using wheel weights will put error into your calculation because the spring doesn't support the weight of the wheels, tires, rear end, gears, ect.

[DANNY]

Ok that helps alot more i have about 700 lbs on the lr and only about 450 on the rr... Cus they both are about 13" as they sit in the car now

But now i wonder why its so screwy lol

[fast_crew]

Doing it that way your measurments have to be better then close, does the 16" 125lb spring really measure 16", and is it compressed 7" (875) or 7.25" (906) or maybe 7.5" (937) But this is more accurate.