Era Replica Automobiles 427 ROADSTER, Assembly And Service Manual

Page: 54 / 165

SECTION B -PARTS PREPARATION-
54
DAMPERS AND SPRINGS:
If the car seems too high when first lowered to the floor, don't panic. The car will settle a bit after driving.. The spring
specifications below have worked for us consistantly.
The E.R.A.-Jaguar subframe requires XKE Series I or II dampers. Height adjustable dampers are available from E.R.A.
DAMPERS
SPECIFICATIONS
Position Damper
Extended
Length
(eye to eye)
Compressed
Length (with
rubber
compr'sed)
Spring
length
Spring
Rate *
(lbs/inch)
Front 17.5" 12.1" 12" (Spax) 250
Rear (Jag) Stock XKE 13.3" 10.1" 10" 250
Spax w/o height adj. 13.3" 10.1" 10" 350
Spax with height adj.
13.3" 10.1" 8" 350
Rear (ERA Design)
Spax with height adj. 14.5” 10.5” 9” x 2.25”ID 450
*The spring rate is either on a tag or etched on the end of the spring.
If you use a different brand coil-over, do not exceed the extended length by more than 1 /
4
".
FRONT SPRINGS
Because of small variations in the free length of new
springs the installed height in the damper may vary
slightly. Use the
preloads at the right to calculate the
spring installed height.
b\spring
Measure each spring and subtract the values below for the
installed height in a fully extended damper.
PRELOAD
APPLICATION LEFT RIGHT
Big Block
275lbs/in. .9" 1.1"
250 lbs/in 1.1" 1.3"
Small Block
250 lbs/in .5" .7"
225 lbs/in .8" 1.0"
Dimensions above apply to Spax dampers only.
Because component weight may vary from car to car, final
adjustments to determine the correct ride height should be
made after the car has been driven a short distance to settle
the springs. See page 145.
REAR HUBS, BOLT-ON WHEELS:
To accept bolt-on wheels, Jaguar XJ hubs must be used.
They have a flange with (5) ½-20 studs.