I know it's long but hope it helps someone else, if I would have known this at first I would have never even bothered with 14" coils
Compressing them want very fun but in the end gained space between each loop of the coils and as you'll read these are the coil he recommended, again the "bounce" over small bumps was reduced due to less preload
Me:
Hi, I have a 2005 tundra double cab with an Arb front bumper and. with sway away 2.5" coilovers with 14" 700# springs. Right right now I am sitting at about 2" lift and the coils have 1.75 " of preload which leaves them quite compressed at ride height. I am adding a winch to the front and am worried about sagging in the front. Will it work to put a 16" 700# coil on there to try and use the full adjustment of the shock or
Do you have a recommendation for what I can do to remedy this. I don't want to crank it anymore and would rather have the coil fill the entire shock, hopefully you can help me,
Tyler
Eric:
With that spring and preload combination you're at the block height of the spring at full bump so you can't add anymore preload. If you went to a 16-700 you would have to back off the adjuster nut to only .687" of preload because the block height is longer. So with gaining 2" in free length and loosing 1.063 in preload you get 0.937" of lift at the shock. I don't know what this translates to at the wheel without the dimensions from your lower arm. Look at the picture I attached as tell me what D2 and D1 are on your lower arm and then how much weight will be added by putting the winch on. I will be able to tell you how much it will affect the ride height with your current springs and you can decide whether or not to leave them the same or change springs.
Eric Tice
Me:
Excellent, I took some more accurate measurements:
Preload: 1.625"
D1: 8"
D2: 19"
I would like to keep a similar ride height to what I have and the main thing is I want to have as little preload down the coilover as possible as I find on small bumps the front suspension is quite jarring. The winch that I am adding is 112lbs And currently have 220lbs nitrogen in the shocks. Let me know what length and spring rate you would recommend, I added a picture of what I'm looking at too, coilovers are 4 years old.
Eric:
With making some rough assumptions in the math for the sake of simplicity and time, adding the winch will only drop it about 1/4" at the tire centerline. Its only a small amount because the spring rate is so high. Whether or not that drop is too much for you I would only recommend going to the longer spring. 700 lb/in is already stiff as hell and the highest rate Eibach advertises on their site is 650 so I'd assume you're in custom territory with your 700 or anything stiffer. 16-700 is a standard spring they list on their site. So with the longer spring and the winch; if you back the adjuster nut all the way out so its against the top cap you'll get 7/8" of lift at the wheel centerline. Thats the minimum lift that you can have with that spring. On the opposite end of the spectrum you can crank the nut down to 0.687" of preload and get 2.5" at the wheel centerline. I don't know what lift height window you're looking to stay within, but in my opinion the 7/8" would most likely be reasonable from a geometry point of view. Anything more than 1.5" or 2" and you would be stealing from droop travel. Let me know if you have any other questions.
Eric Tice
Hello Tyler,
Our engineer, Eric Tice, informed me that you are interested in purchasing heavier coil springs for your coil over shocks, part number 16-700-3
At the present time, we do not have these coils in stock.
Please refer to one of our dealer's website to purchase these.
http://www.polyperformance.com/shop/Eibach-16-Long-3.0-ID-Coil-Springs-p-11
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