Quote:
Originally Posted by RotARy15
(Post 3431279)
How bad is the loss of bump stroke? I'm installing Raceseng plates on Sachs dampers and stock springs this week and I plan on staying with those components for at least the fall track day season.
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You're probably fine with that setup. I ran Swift lowering springs that lowered the car ~1.5" front and 1.25" rear, and it was a disaster with the Raceseng plates. I cut the bump stops down from 60mm to ~22mm, and also had 6mm (1/4" maybe?) spring spacers fabbed to gain back some front bump travel. Those improved things *a lot*, but still almost undriveable on the street. Smallest bump = BAM! You should have on the order of an inch more bump travel than I did though, which I think will be fine.
Quote:
I thought I saw that someone measured a 1mm rise in ride height with the Raceseng plates but there was no mention of whether the upper spring perch and upper damper rod mounting point were independently relocated.
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If anything, it seems to me the Raceseng plates with stock-diameter perches *lowered* my front end, something on the order of 1/8" to 1/4". vs. what I expected with the Swift springs. I think the relative damper rod and spring perch heights are the same *at the spring*, but in the middle of the spring perch there's a radial bearing that takes up ~15-25mm of bump travel.
Ultimately I replaced the sachs dampers with Bilstein B8s, and they apparently have a ton more bump travel, it's no problem at all now even at -1.25"! In retrospect I would have gone with RCE Yellows or Tarmacs at slightly higher ride height to have more bump travel. As it is I'm running lower than my time-trial competition's same-year 86, at his preferred height on adjustable Ohlins coilovers! |
