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Old 05-16-2018, 07:05 PM
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Default What is your Fox 2.0 Valving on stock springs?

I have searched and searched but most end up discussing Sulastic, aftermarket leafs, tire psi, etc. wanting to stick strictly to valving please.

I have an F-350 CCLB Dually(yes) air bags in the rear, stock springs and Fox 2.0 performance with reservoir on all corners. That I use to tow a 16k fifth wheel with. Valve code on the dust cap is T/90, which from what Iíve gathered is something like a (flutter compression)30/90(rebound). The issue I have is the truck will dip in slight hole and the compression is not fast enough on the coming out so it bounces out. Yes Iím aware ďitís a truckĒ but I believe I can make it better with a few changes. So Iím gonna re-valve, which any body that has tried will say itís tough to get it right on the first try.

So of course call Fox and see what they say....... ďthe piston I have is a single bleed .070 and code was last updated in 2009. I should add .070 bleed to all pistons and change the compression side to #50 in the rear(to work in conjunction with the bags and change compression to #70 in the front......i could be wrong(hence why Iím here but)I would think increasing the stack thickness from the .008 to .012 would have the opposite effect of what Iím trying to achieve. Making compression stiffer. Hoping somebody has a similar setup(stock springs/aftermarket bags and 2in shocks) that wouldnít mind taking a peak at their dust cap(where the shaft goes in and giving me some idea of what I should be going for.

Thanks

IMG_1291.JPGIMG_1291.JPG


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Old 05-17-2018, 05:22 AM
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HeavyAssault HeavyAssault is offline
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I've been told more than once you want to allow compression and control the rebound. Make the spring work. I know it's all about personal preferences. Not to mention what PSI are your tires.
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Old 05-17-2018, 07:31 AM
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Quote:
Originally Posted by HeavyAssault View Post
I've been told more than once you want to allow compression and control the rebound. Make the spring work. I know it's all about personal preferences. Not to mention what PSI are your tires.


Thanks for the reply, Iíve tried dropping tire psi to 30, with the same results.


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Old 05-17-2018, 10:36 PM
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No one? Well I guess Iíll do some experimenting. I talked to Fox again today and there actually was a misunderstanding of what I was after. Said ďAdding 2nd bleed port would allow a lot of low speed, we want to use compression to control it. So use a #50 stack(0.010) and keep the same flutter pivoting on a 0.008.Ē I have riden in the truck and know how it feels and what I believe it should feel like, canít help but think increasing to a #50 stack would yield a similar performance to what Iíve got now...Being that it takes all of 15 mins to rebuild a shock I figured why not just toy around, see what I can come up with.

Got a few things to do tomorrow so want to leave this here in the hopes someone that knows will tell me ď hey youíre screwing upĒ or ďyea looks legitĒ
Hereís what Iíve got so far.
Move my thinnest 1.42x.006 to front to allow more flex and flow
Move my 1.35x.008 to the second position for support
Leave the .8x.010 for pivot
Move my 1.6 to the 4th position to give the flow leverage in the high speed as well as support for the ďfront lineĒ so to speak.


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Old 05-18-2018, 04:20 AM
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For 15 mins of work even if it's not right sounds like an easy fix. Go at it Bro. You are blazing the trail.
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Old 05-29-2018, 06:21 AM
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How did it work out? I have a similar issue with bouncing rear suspension on a CCLB Dually pulling a 15k 5th wheel Toyhauler and Rancho 9000's. Have been seriously considering moving to the Fox 2.0's.
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Old 05-29-2018, 07:11 AM
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I changed the shims around to this configuration and drilled out the bleed hole in each piston(per Fox).....smoothed out a lil bit but I canít stop there lol. still has a jitter in the rear end sometimes. seems to ďfloatĒ better now the front wants to rock when turning slow up an incline. Not bad just more noticeable. Canít seem to find anybody thatís happy with their setup and willing to get the valving numbers off their dust cap, so searching and searching some more. I did come across a dodge forum where Don Thuren from Thuren Fabrications set a dually up with 40/100 in the front and 20/120 in the rear but unsure of what dodge/spring rate/weight or how he stacked them. I wrote him on Facebook but he hasnít responded.

In my mind Iím trying to imagine what that valving would feel like as Iím driving and it would make sense given the strength/stiffness of the springs to have really light compression(for give) and a heavy rebound(to resist the tires from slamming back down) as well as be different from front to back. So I may try it out, but since Iím new and not a lot of people are in the game of dually suspension or willing to give away their trade secrets gonna look into it some more before I just start throwing money at it.


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Old 05-29-2018, 07:23 AM
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Quote:
Originally Posted by blackseven View Post
How did it work out? I have a similar issue with bouncing rear suspension on a CCLB Dually pulling a 15k 5th wheel Toyhauler and Rancho 9000's. Have been seriously considering moving to the Fox 2.0's.


Iím sure if you were to get them from Carli, BDS(believe owned by Fox), even Thuren fabrication or anybody that does their own valving like a shop that has a way of weighing the front/rear the 2.0s can be valved to almost Cadillac status.

If I were looking to buy some more Iíd call Carli or Thuren and see what they say your best options would be.


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