We wanted to lower our Bugeye Sprite for obvious reasons–better handling, and, yes, meaner looks.
The Sprite’s rear end is supported by quarter-elliptic springs that are sort of rammed into a slot located at the front of the frame–near the wheel well–and then allowed to just hang out in space until the rear end is bolted in.
Lowering this rear …
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I've seen these available from various vendors. They are usually advertised as 5 degrees or 6 degrees (to lower more). What would these blocks equate to?
I have used front suspension wedges for heavy duty trucks, which are available from NAPA. They come in 1/2 degree increments from, I believe, 1/2 degree to 5 or 6 degrees. As I recall I used a 3 or 3 1/2 degree wedge for my Bugeye with new rear springs available from Moss Motors. This lowered the rear axle to about the same ride height as original.
The NAPA wedges are cast and are about 2.5" wide, which is a little wider than the spring, but it has a groove near 1 edge that would allow you to make it a bit shorter than the spring. You will need to drill a hole to clear the through bolt that holds the leaves together, and file notches or cut off about 1/4 to 1/2" from the narrow end to clear the front hold down bolts for the spring. Last time I checked, which was a few years ago, they were about $10 each.