Do spacer lift kits place stock coilovers at risk in bottom-out scenario?

S

snowy

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I noticed an comment in a Tacoma forum that spacer lift kits, such as RevTek and Daystar, by shifting the stock coilovers down, place them at risk of bottoming out before the factory bumpstops can protect them. This is a concern to me because I have the RevTek spacers on my 4Runner and frequently bottom out when rock crawling (no hard landings after catching air or anything).

Question: I have seen no reference to this possibility in the 4Runner discussions on lift kits, including those that review spacer kits. Is this applicable to 4Runners, 2008 in particular, or is there something different about the way the bumpstops work that still protects the stock coilovers even when spaced down a few inches?


Thanks in advance,
Snowy
 
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using a spacer on top of the coilover is one thing, but since u have an steel bumper & winch, the stock coils will not hold up well, too much extra weight, handling also suffers but u must of known that considering the bottoming out. go with the one of the aftermarket coilover mentioned in ur other post.
 
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If true, would be nice to document here for others

chaz said:
using a spacer on top of the coilover is one thing, but since u have an steel bumper & winch, the stock coils will not hold up well, too much extra weight, handling also suffers but u must of known that considering the bottoming out. go with the one of the aftermarket coilover mentioned in ur other post.
Click to expand...

Thanks Chaz. If the physics are correct and these lifts push the OEM coilovers down low enough that they are bottom out before the bump stops, I was still sort of hoping to document that here for others. I know this would have put be over the edge to go straight to coilovers and skip the spacers if I would have known this.

Snowy
 
snowy said:
I noticed an comment in a Tacoma forum that spacer lift kits, such as RevTek and Daystar, by shifting the stock coilovers down, place them at risk of bottoming out before the factory bumpstops can protect them. This is a concern to me because I have the RevTek spacers on my 4Runner and frequently bottom out when rock crawling (no hard landings after catching air or anything).

Question: I have seen no reference to this possibility in the 4Runner discussions on lift kits, including those that review spacer kits. Is this applicable to 4Runners, 2008 in particular, or is there something different about the way the bumpstops work that still protects the stock coilovers even when spaced down a few inches?


Thanks in advance,
Snowy
Click to expand...

Just documenting some data here for others. I checked with a couple of after-market coilover vendors to make SURE they designed around this and here are some responses:

From Mike Crosby at Icon:
"Our shocks are designed around the stock bump stops so that you will engage them before damaging the shock."

From Andries at Overland Warehouse:
"With the HD coilovers the factory bumpstop prevents the coilover shock from over compressing. On the rear we include bumpstop drops to prevent the shock from over compressing."

Snowy
 
I wonder if the older model daystar spacer kits that OW sells avoid this. They are the two-piece spacer type; approx .5" of preload that goes on top of the spring itself, and approx 1" of topout that goes on top of the shock assembly. The newer daystar kits and most of the other spacer kits are all topout spacer types that while easier to install force the whole suspension assembly downward to achieve the desired lift. Not sure if the geometry of the different spacer options avoids or exacerbates the problem mentioned in this thread but would be nice to know.
 
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