align sub-frame and measure for coilovers
 

I figured I would just do two questions in one thread instead of two seperate threads. I read a long time ago how to find number 2 but can't seem to find it anymore.

1. I want to make sure my sub frame is in my car correctly, lined up perfectly. It's a wayne due c4 subframe. how?

2. Next is where do I make my measurements to find compressed and extended height for coilovers? How do I simulate compressed? floorjack under the lower arm? and extended? I'll be using Proma Star QA1 Double Adjustable.

Thanks for the help :lateral:

I have a wayne due & it has no holes for the alignment pin, not sure if yours does. Check out this thread-
http://www.pro-touring.com/forum/showthread.php?t=63746

I had a tough time just getting the subframe bolts lined up to the cage nuts in the body. I dont think there is any play for me to move the subframe if its not square. I have not gotten that far as to measure, but i hope its very close. Let us know how it goes! Scott

There should be some 5/8" alignment holes drilled on the front (at the firewall) mounting ears on the subframe next to the holes where your bolts and bushings go. Drop a plumb blob to the ground and mark the concrete. Then, go to the front of the rear framerail and there is a 1/2" or 5/8" alignment hole in front of the oval slot. Drop a plumb bob from that one as well. Then just take X measurements from the front to rear to get it square.

There's several other areas you can pull dimensions from as well, but these two are the most common. I also used core support holes for my front points of measurement. This will give you a longer dimension to pull for potentially better accuracy.

Don't overthink it too much. I racked my brains trying to get it exact and spent WAAAY too much time doing it. Remember that your car is 40 years old.

Good Luck.

Alright sweet thank you. I'll get measured up this weekend.

What about getting the measurements for the coilovers?