Time to get the car ready for it's last few events for the year.
I've been wanting to get the car scaled for a long while and haven't been able to setup any time with friends that have scales. I figured it would be worth figuring out my own set of scales in case I wanted to try different setups. Well I sure didn't want to spend ~1500+ on a good used scale setup.
So off to amazon and looking for high rate bathroom scales. I found some scales rated at 400 lbs a corner for a good price. Went about making some levelling pads for them as I know how important dead flat is for corner weighting a car.
Finally got everything setup today and got the car scaled and mostly cross weighted - I accidentally rolled the car forward off the scales instead of back onto the boards on my last go before checking my last fine adjustment and called it a day.
75 bucks worth of scales that are surprisingly accurate & consistant, 45 bucks in metal because I bought it at lowes instead of going to the metal yard, 5 bucks in wood from the scrapper at home depot and some chair levelers I had left over from another project and I have scales and pads that I can reuse use for the longacre 12x12 scales if I ever want to upgrade.
Car weighs 1302 as it sits, no hood & half tank of gas. ~54% rear bias as it started - better than I expected.
After I ballasted for myself and did the cross weights rear bias went to about ~58% and I was able to get to ~50.8% cross weight down from ~54.5%
Car with me in it is ~130 lbs over minimum weight. I'm planning on dropping 50 lbs for next season. Switch to aluminum wheels should get me ~36, aluminum front hubs and hats should get me another ~10-15, aluminum hats and calipers in the rear should be another 10-15. so that will leave me ~10-25lbs over minimum weight. I'm sure the front & rear aero packages will add a few pounds so I"ll likely have to go looking to lose a few more pounds on the car. probably the passenger seat & harness as well as some shorter springs all around.
Next up is bump steer. I looked at various options to measure it from the more standard piano hinge plate and dial caliper(s) to the newer method of using a laser, a mirror & some geometry. After scouring town for a laser and a small mirror i'm going to give that a shot. requires a lot less tools and should be accurate in capturing bump & camber curves.