Longacre 4-Pad Scales - F-Body Road Racing and Autocross Forums

A friend loaned me his Longacre 4-pad scale system last evening. This evening after work I need to weigh my car in preparation for my CMC dyno pulls tomorrow (I need to know if/how much hp/tq to pull out of the motor). I planned on weighing the car in my 2-car garage but it has a very gentle slope towards the absolute center to allow runoff to go down the drain. This means that even if I center the car over the drain, the location of the 4 pads may not be perfectly level. As a backup, I took a level out to my rear, omni-stone patio. While it is level, there is some uneveness in some of the stones and it will not likely allow the pads to fully distribute the weight across the base of the pads.

Question:
1) Is this small amount of slope in my garage enough to be concerned about? I want to esnure that I don't damage the scales and I am looking for a reasonably accurate weight.
2) Would I risk damaging the pads if I used them on my omnistone patio given that they may not sit flat against the surface?

Anyone with knowledge/experience with the scales can feel free to chime in on my questions or give helpful hints. I need an accurate weight and the system did not come with instructions...

Thanks.

KeithO View Member Profile	Mar 18 2005, 01:09 PM Post #1
Veteran Member Group: Advanced Members Posts: 2,647 Joined: 23-December 03 From: Pittsburgh, PA Member No.: 14	A friend loaned me his Longacre 4-pad scale system last evening. This evening after work I need to weigh my car in preparation for my CMC dyno pulls tomorrow (I need to know if/how much hp/tq to pull out of the motor). I planned on weighing the car in my 2-car garage but it has a very gentle slope towards the absolute center to allow runoff to go down the drain. This means that even if I center the car over the drain, the location of the 4 pads may not be perfectly level. As a backup, I took a level out to my rear, omni-stone patio. While it is level, there is some uneveness in some of the stones and it will not likely allow the pads to fully distribute the weight across the base of the pads. Question: 1) Is this small amount of slope in my garage enough to be concerned about? I want to esnure that I don't damage the scales and I am looking for a reasonably accurate weight. 2) Would I risk damaging the pads if I used them on my omnistone patio given that they may not sit flat against the surface? Anyone with knowledge/experience with the scales can feel free to chime in on my questions or give helpful hints. I need an accurate weight and the system did not come with instructions... Thanks.

rmackintosh View Member Profile	Mar 18 2005, 04:36 PM Post #2
Senior Member Group: Advanced Members Posts: 5,226 Joined: 24-December 03 From: Danville, CA, USA Member No.: 27	ANY variation in slope is gonna make the corner weighting function of the scales mute.....if you are looking to just get a weight....then no problem. I WOULD NOT put them on UNEVEN ground as this could damage the scales if they don't sit flat and you put a heavy car on them... If ACCURATE corner weignts are what you are after, you will have to get a good long level, and figure out someway to shim the pads level