JZiggy
Senior Member
Hopefully they are only dropping the coil adjustment by 1/4"-1/2" since you get a 2x multiplier on the ride height.
Dobinsons IMS 2-3" Lift Details and Review
- Thread starter JZiggy
- Start date
Hopefully they are only dropping the coil adjustment by 1/4"-1/2" since you get a 2x multiplier on the ride height.
Devbot
New member
Ah that could be it. I figured there had to be some reason, otherwise you'd hear people talk about it MUCH more
HiluxSurf SSR-G
Senior Member
Do you have free lengths and wire diameter of those two coils springs?
What's the valving of the shocks, progressive or digressive?
Thanks!
What's the valving of the shocks, progressive or digressive?
Thanks!
JZiggy
Senior Member
I don't, sorry. I can measure the wire diameter for you at some point.
[MENTION=148378]Crikeymike[/MENTION] maybe Mike can comment on the shock valving question? I would be interested to know as well.
Crikeymike
Senior Member
Shock valving in all Dobinsons shocks in linear/progressive.
I've been looking for a Dobinson rear shock comparable to an FJ80 rear shock (14.5" compressed to 23.5" extended) or possibly a shorter compressed length around 13.5" with a good amount of travel, but I'm having a hard time finding measurements on most Dobinson rear shocks. Do you have any suggestions or recommendations? I'm trying to find a good shock to match with FJ80 7.5 wrap coils or Dobinson 210V.
fourfive
Senior Member
Interested in exactly this also.
HiluxSurf SSR-G
Senior Member
IMS59-50705: rear shocks for the N215 and N285 4Runner
Extended length -- 23.23"
Compressed length -- 13.98"
hth
Extended length -- 23.23"
Compressed length -- 13.98"
hth
Thanks for that! What's the difference between IMS59-50705 and IMS59-50701? They both show to be for the same vehicle applications for the same amount of lift.
HiluxSurf SSR-G
Senior Member
IMS59-50705 has comfort valving. but both are for 0-2.5" lift.
But accdg to this, it's 0-3" lift:
Dobinsons IMS Struts and Shocks - Adjustable Height Monotubes - 5th Gen 4Runners
But accdg to this, it's 0-3" lift:
Dobinsons IMS Struts and Shocks - Adjustable Height Monotubes - 5th Gen 4Runners
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Ahhh I see that now. Thank you! I'm guessing with added weight in the back the normal valving would probably be more appropriate.
fourfive
Senior Member
If I'm understanding the logic correctly, the 4th/5th gen 4runner rear shocks advertised as their "comfort valved",IMS59-50705, would be ideal for 4runners (3rd gens) using a 3"+ rear spring without constant rear weight or armor & IMS59-50701 are for medium to heavy constant rear load.
If that is the case, I wonder at what weight limit (specifically for 3rd gens) would it make sense to switch from the comfort valved IMS59-50705 rear shocks to IMS59-50701?
Also wonder which of those 2 rear shocks would play best with the 210v?
Since the IMS59-50705, IMS59-50701 & 210v aren't for 3rd gens, I'm asking here b/c I'm assuming I wouldn't get a straight answer if I called the manufacturer or distributor with these questions.
HiluxSurf SSR-G
Senior Member
not an answer, just added info, the 210V has a spring rate of 160/239 lb/inch and a free height of 18.70"/19.09".
DISCLAIMER: The following is purely a guesstimate based on gut feeling and sloppy napkin math. Use at your own risk! :lol:
I think comparing curb weights would probably be the best way to determine which one to go with. All curb weights listed below are from google.
2000 4Runner curb weight 3440-3975
2002 4Runner curb weight 3600-3975
2008 4Runner curb weight 4045-4530
2015 4Runner curb weight 4400-4805
Typically a vehicle has more weight on the front axle vs the rear axle when unloaded. Let's guestimate 55 front/45 rear.
So it looks like a difference of 400-600ish lbs between 3rd and 4th gen 4Runner's. About 180-270 lbs rear axle difference.
Around 800 lb difference between 3rd and 5th gen 4Runner's. About 360 lbs rear axle weight difference.
Based on those guesstimations and napkin math I would think larger wheels and tires (unsprung weight still plays into shock performance) and a steel rear bumper would probably be the limit for the comfort valved shocks. I think either would work well with the 210V springs. If you're planning on doing some high speed offroading then I have no clue whoch would be a better option.
jross20
New member
So I ordered some of the ims shocks. But of course right after I order them and received them now I see that it looks like some of you guys are considering using the 4th gen version? I was a little disappointed that the version for the third gen is pretty short in terms of travel.
Curious if I should hold off on installing them and try to swap to the others? Or would it really matter at all...
Curious if I should hold off on installing them and try to swap to the others? Or would it really matter at all...
What rear springs are you using? 4th gen rear shock travel would need FJ80 front springs or OME861 or similar
jross20
New member
Currently I'm running 890s. I've actually ran stock Land cruiser shocks previously and there was no looseness on the coils at Max flex. While not totally scientific, I think it really only becomes a problem when you go beyond like nine and a half inches of travel, maybe... My only complaint with the IMS shock, the model specifically for 3rd gens, is that it's travel it's just barely longer than stock which seems a little silly... Although I was willing to try it just because I'm so sick of how kings ride.
I mean maybe it doesn't matter... I was basically going for what some of the guys called the mid travel setup. And that's basically what I'm rocking now, it just rides like crap lol
Looseness when flexing is a problem, but the bigger problem is bottoming out on the shock travel because you don’t have your bump stops long enough. I would flex it out and take some measurements on the tucked side to make sure you don’t need to extend your bump stops. Also take some measurements at ride height to determine how much up travel vs down travel you have. You ideally want to be close to midway between the two.
jross20
New member
Oh yeah I'm running the 3" duro bumps. Originally had the 5" but it was way too long...
But yeah the 890s were never loose with the LC shocks or my kings. Do we have the exact measurements for the 4th gen ones? I'll have to also talk to dobinson to see if they could valve that other shock to be plush for a 3rd gen. Could be perfect
Took me some searching, but I found the info earlier in this thread. https://www.toyota-4runner.org/3641574-post28.html
