Donahoe exposed threads vs. lift correlation

[p1michaud]

I know the Donahoe Coil Overs are set at 2" of lift from the factory. Does anyone know what the correlation between exposed threads vs. lift setting for the Donahoe coil overs (see picture).



I know that actual lift will vary from truck to truck but I wanted to know where my used Donahoes were set at. The exposted threads is 61mm (2.4" or 2 7/16").

Cheers,
P

[mountainpete]

I'm sooooo sorry I haven't snapped any pics for you yet! I have to wash the truck and canoe tonight so I'll grab some after work.

Pete

[p1michaud]

I'm sooooo sorry I haven't snapped any pics for you yet! I have to wash the truck and canoe tonight so I'll grab some after work.

Pete

Pete,
No worries. Any chance you could measure the exposed thread? I've also contacted Donahoe directly because apparently there are differences depending on what bottom coil seat you have (there was a minor design change to impove the brake line contact issue). I'll see if I can post a few pictures.

Edit for added pictures.
Old style bottom coil seat (photo credit Expeditions West):


New design bottom coil seat:


Difficult to see from the picture, but it's taller/longer and provides additional clerance for the brake line.

I partially tore down the Donahoes last night for a clean, inspect and prep session. I did find a missing set screw for the bottom collar that screws into the shock can. If anyone ever needs one they are a #10-24 UNC x 3/8" long cup point socket head set screw. I found some locally and will replace it. I'll also use blue loctite to secure it in place. Pictures to come this evening.



Here is a picture of the set screw in question.


This is the one that was missing.


I'm hoping to install on the weekend as long as the lower heim joint spacers arrive in time.

Cheers ,
P

[mountainpete]

P,

Does this help? I haven't cranked them at all - standard Donahoe setting.



Hi-res pic here (you can see how those threads get packed with dirt!)

Pete

[p1michaud]

P,

Does this help? I haven't cranked them at all - standard Donahoe setting.

(you can see how those threads get packed with dirt!)

Pete

Pete,
That's a good start! I count 18 thread "peaks" and will see how that compares to my coilovers tonight.
Thanks for the info.
Cheers ,
P

[erin]

Will have to look, not sure if I have old/new vesion, but mine came w/ exactly 2" between top and compression ring.

[p1michaud]

Will have to look, not sure if I have old/new vesion, but mine came w/ exactly 2" between top and compression ring.

Excellent thanks!
P

[p1michaud]

I just got off the phone with Donahoe Racing (951-279-8000). Great guys to deal with and very helpful. So for anyone else who needs to know the come from the factory with 1 3/4" of thread showing see pictures below.



The figure is only valid for the older style bottom coil seat as shown below.(photo credit Expeditions West):


Cheers,
P

[Super Doody]

There's really no correlation. Lift a combination of front end weight (offroad bumpers, battery,skid plate) and pre load (how much "thread") is exposed. Just 2'' has a guide and then adjust to desired ride height.

Thanks for the set screw info.

[p1michaud]

You are entirely correct that there is no direct correlation between exposed threads to amount of lift. As you mention each rig is different so the lift will vary from rig to rig. What I should have said is Donahoe factory setting vs. exposed threads. Essentially I wanted to know how Donahoe set them up when they shipped them out.
My plan has been to adjust to 1 3/4" of exposed thread, install, drive arround the block, adjust, drive again and repeat untill I get approximately 2" to 2 1/4" lift for my truck.
Cheers,
P

There's really no correlation. Lift a combination of front end weight (offroad bumpers, battery,skid plate) and pre load (how much "thread") is exposed. Just 2'' has a guide and then adjust to desired ride height.

Thanks for the set screw info.