Spring Perch - Shock Plate Gap, Different Opinions?
This question is one of pure curiosity. Replies to a somewhat recent posting shown below suggested that a bit of a gap between the spring perch and shock plate was ok, in fact may even be desirable (see clipped in image). In another article posted in the Suspension Forum entitled "Good Article" the following statement is made:
"Some aftermarket leaf springs are thicker (height-wise) than stock springs and leave a gap between the perch and shock plate. This leaves you with the choice of removing the lower isolator pad to close the gap between the perch and shock plate or adding shims between them.With either solution, you should firmly lock the leaf spring in place between the perch and shock plate. If you have a gap between the shock plate and perch, the plate will start to bend and the hardware will start to bend and eventually fail."
So, which is correct? I'll assume we're not talking about a wide gap between the perch and plate, but should the perch and plate be in 100% contact when the bolts are torqued? If trying to accomodate angle shims to adjust pinon angle, this can be difficult without some form of spacers to close the gap. I have about a 1/8" - 3/16" gap with my U-bolts torqued to the recommended 40 lb-ft, thus my interest in this topic. I have a box of alignment shims and I may use a few of those to close the gap between the perch and plate allowing the proper U-bolt torque but limiting distortion of the lower shock plate. What are your thoughts on this?
'69 Z/28, Lemans Blue/White Stripes, DZ302, Tremec Magnum, 4.10, Procar Elite Seats,
Custom Upholstery, Dynatech headers, 17" VWW V45's, 235/45, 275/40, C5 Front Brakes