5100's with stock coils

[01thunder]

i know someone has this, but couldn't find the thread. as my sig shows, i have the stock coils set on the 4th groove from the bottom up. i want to move them to the top, 5th groove. who has there coils/struts setup this way and how is the ride? are the struts fully extended? i have bj's to replace and want to do this while i am there.

 

[snivilous]

[MENTION=60147]the kid[/MENTION] ...I think he did/was running 5100s maxed on stock or tundra coils...

 

[the great him]

so i have run the TRD Tundra coils on the tundra 5100s on the 3rd(middle) setting, and had no issues.

i then upgraded to the 3" eibach coils from toytec, and dropped down to the 2nd(from the bottom) setting, that was fine but still too much rake for me, so i had them readjusted, told the guy to put them on the 3rd(middle) setting. well he didnt listen and put them on the 4th(from the bottom, 2nd from the top) setting and i promptly blew out both my struts within 1000 mi. now stock factory 4runner coils, im not sure. honestly i dont think id go any higher than the 3rd setting, maybe im gun shy idk but you gotta think just cause the tundra 5100 has 5 settings, doesnt mean they will work on the 4runners, i mean so many other variables come into play between the two trucks, weight, height differences and locations and distance differences in all of the suspension, travel distances ect. there is too much that could be and probably is different, just cause they will fit in there and are roughly the same length... suspension travel could be different idk so im not gonna tell you to go ahead.

im still young and have a lot to learn on some things, suspension is one of those things, while i was good at geometry in skool(pun intended) i never really liked math or algorithms or algebra or variables ect, too much thinking so i left that for the nerds lol. what im saying here is, i tried this cause it looked like it would work but i didnt think of all the variables at first, so yeah i might have screwed myself idk, but i dont want that blood on my hands with someone elses rig. i am by no means an expert and so yeah try at your own risk. one last thing i will say though is think about this, the higher you go, the more preload you are putting on those coils, meaning the harder they are gonna want to push your front end up when you unload the suspension going over bumps and stuff, so you might end up topping out your shocks/struts, in a harsh manor that might not be good for them, i dont think you should have to worry about them being your bump-stops but making them your limit straps could be a bad thing with too much prelaod.

 

[snivilous]

One thing, you don't preload the coils to adjust ride height, you merely adjust where the shock sits naturely. The harshness people feel is from the valving being not in the optimum location (as far as I can figure).

 

[HiluxSurf SSR-G]

pre-loading of coils can be done several ways:
1. internal pre-load by using the upper perch settings on the bilstein 5100 or other similar shocks
2. internal pre-loading when using coil-overs and adjusting the position to gain lift.
3. internal pre-load by using a spacer located between the coil spring and the top plate.
4. external pre-load by using a spacer above the top plate. however, in this case, pre-loading only occurs when the strut assembly is in place.

theoretically, when a coil spring is installed, even in the stock configuration, it is already pre-loaded. so when lifting, additional pre-load is applied.

the valving of the 5100 is constant throughout the travel length so the harshness comes from the coil springs. meaning, damping against compression is constant and damping against extension is also constant. although the damping value for compression is different from that of extension.

For the tokico trekmasters, the valving varies across the travel length. the more it is extended or compressed, the higher the resistance. so with the trd tundra coils installed, most of the travel occurs in the firm region because it is located in the extended region due to the stiffer coils




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[HiluxSurf SSR-G]

why not instead use the trd tundra coils and use the 2nd or 3rd perch (from the bottom)?

i know someone has this, but couldn't find the thread. as my sig shows, i have the stock coils set on the 4th groove from the bottom up. i want to move them to the top, 5th groove. who has there coils/struts setup this way and how is the ride? are the struts fully extended? i have bj's to replace and want to do this while i am there.

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[01thunder]

why not instead use the trd tundra coils and use the 2nd or 3rd perch (from the bottom)?



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i don't have any nor could i find them, so i used my stockers. trust me, i would have installed trd coils had i found them. i would rather have trd that way i can move the perch down and get the truck level.

 

[snivilous]

pre-loading of coils can be done several ways:
1. internal pre-load by using the upper perch settings on the bilstein 5100 or other similar shocks
2. internal pre-loading when using coil-overs and adjusting the position to gain lift.
3. internal pre-load by using a spacer located between the coil spring and the top plate.
4. external pre-load by using a spacer above the top plate. however, in this case, pre-loading only occurs when the strut assembly is in place.

theoretically, when a coil spring is installed, even in the stock configuration, it is already pre-loaded. so when lifting, additional pre-load is applied.

the valving of the 5100 is constant throughout the travel length so the harshness comes from the coil springs. meaning, damping against compression is constant and damping against extension is also constant. although the damping value for compression is different from that of extension.

For the tokico trekmasters, the valving varies across the travel length. the more it is extended or compressed, the higher the resistance. so with the trd tundra coils installed, most of the travel occurs in the firm region because it is located in the extended region due to the stiffer coils




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You can't preload the springs. To do that would mean that the shock is being stretched out so that it's applying force to the coils, to do that means the shock is "topped" out and fully extended. Which means you would always be riding at full droop. So if your IFS droops at ALL you do not have preloaded coils.

And say your coils WERE preloaded, it wouldn't increase ride height because all you are doing is compressing the coil, not actually moving it. Moving the perches just moves the coil up further on the shock, but the coil will compress the same amount from the weight of the truck regardless so you are in actuality just moving the shocks natural extended position relative to the coil.