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Old 06-13-2013, 09:27 PM
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Default getting airborn with heavy dana 60 and coils

Some of the bogs i run have higher humps in the middle and at the end of the run, slowing down not only bums out the crowd but it really ruins some good motivation when flyin through the mud. I have my dana 60 in my f150 with 9 inch coil springs, i do have limiter straps but should i run dual shocks to slow the rear end down when falling if the truck goes off the ground? the truck is a little springy as it is but when it slams down id like for my coils springs not to come flying out my fenderwell!
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Old 06-14-2013, 06:35 AM
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Do you have bumpstops installed? If your truck is "springy" then your shocks aren't doing their job and you may want to invest a little money there to make sure compression and rebound is under control.
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Old 06-14-2013, 08:37 AM
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Oops no now that I think about it I never put bump stops on. My shocks are just the generic Rancho ones. If I put dual shocks on would it help noticeably
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Old 06-14-2013, 09:15 AM
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Most of those generic shocks are set up with a 50/50 compression/rebound setting. To handle going airborn, you really need something with more valving control to get things right. I ran 90/10 drag shocks up front with the bumpstops and it worked really well on flat tracks but would jar me a little on the hard bumps.
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Old 06-14-2013, 10:26 PM
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I agree with Karl here, I run 90/10 front shocks as well, I've seen some pretty decent air time and it seems to soak it up pretty well with just a 4" BDS coil up front. The rear is AFCO 9" coil overs with a mono leaf, its a little bouncy but I'm workin on it still LOL
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Old 06-15-2013, 09:06 AM
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You want a soft spring and a stiff shock that is the key for getting air and having a nice landing.

Derrick
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Old 06-16-2013, 09:18 PM
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my springs are very soft for as big as they are, ill look into some other shocks, how do i know what i need? does the stiffness go by the weight of the vehicle or?
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Old 06-16-2013, 09:43 PM
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Quote:
Originally Posted by jerad188 View Post
my springs are very soft for as big as they are, ill look into some other shocks, how do i know what i need? does the stiffness go by the weight of the vehicle or?
Try these been running them for years and never had any problems. They have 11/16 shaft and bump stops. Easy on the wallet too at only 44.00 and you can get any length you need with either a stud & eyelet or eyelet & eyelet.

http://broncograveyard.com/bronco/c-171
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Old 06-18-2013, 08:03 PM
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heres a question for you about bump stops, i have a set of rubber airbags that came out of an old f150, they go inside the coil springs, would those work as bump stops?? can only compress them so much insde the coil, could be a nice soft bump stop?
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Old 06-18-2013, 09:00 PM
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You don't want to do that. Those air bags are meant to help load carrying capacity. They essentially increase the lb/square inch rating of the coil spring. Not what you want for a bump stop.
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Old 06-18-2013, 09:15 PM
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i understand that and it makes sense, but since my coil springs are probably twice as long as these air bags, by the time the airbag gets used it might be right where the bump stops will need to be anyway.... or should i just shut up and leave that idea alone haha..
i was just looking for a place to even put bump stops and i couldnt find any place that would look decent since i have a big lift on..
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Old 09-09-2013, 05:13 AM
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Quote:
Originally Posted by jerad188 View Post
I was just looking for a place to even put bump stops and I couldn't find any place that would look decent since i have a big lift on...
Most good bumps stops for lifted trucks are custom fabricated.
Depending on how tall your coil springs are, these damper donuts
may be an option. Better than nothing, which will break stuff:
http://www.energysuspension.com/asse...on-catalog.pdf (page 13 - 2 1/4" tall, 3 9/16" dia.)

http://kspecracing.com/energy_suspen...r/i-99165.aspx
http://belloffroad.com/i-7630913-ene...ner-donut.html
http://www.race-mart.com/Energy_Susp...E-9.9005R.html
http://www.summitracing.com/parts/ens-9-9005r
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Last edited by Danny Cabral; 09-09-2013 at 05:37 AM.
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Old 09-09-2013, 06:39 AM
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How much travel should I allow my springs to have? There 9" lift coils
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Old 09-09-2013, 07:11 AM
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Quote:
Originally Posted by jerad188 View Post
They're 9" lift coils.
Well then forget about using the above mentioned damper donuts.

Quote:
How much travel should I allow my springs to have?
I allow almost 3" compression (with my custom bump stop).
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Old 09-09-2013, 07:50 AM
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Call the manufacturer about your spring rate first. You'd be surprised on how stiff those 9" coils really are. Go with a softer coil, higher quality shock, and look into air bumps. Might be more money for the air bumps but well worth it IMO.

My bronco isn't setup perfect for bogs or weight transfer, but I run a wild horses 4" coil in the front (which is one of the softest FSB coil on the market), and dual shocks in the front and I've caught some good air with it and it took it surprisingly well.

I would figure out the compressed length of your coil and set your bumpstops to that level. As far as travel you are only going to get what your free length minus compressed length of your coil. Spring rate will determine where right height will be at. The spring manufacturer will have all that info.
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