Taco PRO Owners: Interested in a spring upgrade for front?

Fuck it, I'll bite.

you contradict yourself between point #2 and the graphic provided. Longer springs of the same rate do give you lift on a non adjustable coil seat like the TRDP, or adjustable coil seats at the same setting. a 13" 600lb/in spring with 600 lb on it will be 12", and a 14" 600lb spring with the same 600lb will be 13" long, effectively giving 1 inch of pre-load and extend the distance between the two shock mounting points, providing lift. you're picture there illustrates such. if coil seats aren't adjusted, increased spring length can be assumed as increased pre-travel. won't fix ride dynamics though, just static height.

All else is valid, and I agree an internal bypass shock should not be "lifted" using springs or pre-load spacers.... unless trying to recoup lost height from increased rate and thus should only be lifted back into stock height/ bypass zone. I also agree that should be done with similar spring length and increased spring rate, though ideally like accutune states, our trucks should ride on 500lbish soft springs but that's just physically impossible to package the right length/preload to achieve that. Pre-loading with a longer 600lb spring to keep it soft may ride subjectively nicer but also *could* lead to coil bind.

As Ryan @ Eibach knows, they supply proprietary 12.6" long 600lb springs for the factory TRDP IBPs. I got a set of 4R TRD pro take offs that I am putting 13" 650lb Icon coils on to help keep designed/factory height since my V8 and armored GX is 200lb heavier up front than the V6 4R they were designed for. Ideally they would be revalved for the increased weight/spring but it may (hopefully) fall into the marginally un-noticeable delta in ride compared to a stock 4R/taco if they fall into the stock static bypass valve zone. This will be my stop gap until I can drop cash on custom valved shocks or off the shelf 3way adjustable Dobinson MRAs.

Really off the shelf fox, king, etc etc are all ball park valved and everyone should get their shocks custom valved for their specific lift, spring, and weight.

TLDR, I agree with you eibach should not be advertising lift to TRDP guys and should only be making springs to compensate for weight and bring their trucks back to factory height.

 

For what it's worth, this is how I interpreted the intent of the spring anyhow. I understand the semantics of your arguments and hope someone wouldn't be gullible enough to buy a spring just to add an inch of lift because. I presume once I get my bumper in and winch mounted, I'll have 3/8-1/2" of sag. Maybe I have a skewed perception as I look through a lens of someone who wants to return the suspension to stock height (or just slightly higher than stock height) by lengthening the spring a bit and increasing the stiffness.

 

I didn't measure my truck before installing the bumper and winch on my 2018 Pro but afterwards, I'm now about a 1.25-1.5" lower in the front. I'd just like to be back to where I was. And maybe add some 265/75's....

 

Do you have pictures of the sag before and after?

 

@Ryan at Eibach Any Updates?

 

I'm trying to get truck about 1/4" higher than stock with an extra 120lbs up front. I doubt just a spring will be able to do that, but anxiously awaiting Ryan's input.

 

I estimate the Warn semi-hidden winch bumper and winch to have added about 130lbs. to mine, and I lost only about 1/4" based on before and after measurements. I cut off the hoop since it blocks the radar and to save a couple of pounds. I didn't lose near what I thought I would, but it does dive a bit more under braking. I am used to it now, but upping the spring rate a little might help and not change the suspension dynamics enough to worry about. Not looking for longer springs or a lift, just compensation for the added weight.

 

interested

 

We test fit in 3 weeks

 

Same. Looks like my estimate was about what you actually measured. Good to know!

Thanks, Ryan... Looking forward to a month from now.

 

This is an after pic. you can see the bumper and winch strap on the front. From ground to center of the fender flare is 1.5" lower in the front as compared to the back. Not super noticeable which is good. I'll have to see if I can find any good before pics, but unfortunately I didn't take a lot of pics before the new bumper.

 

Interested. New Pro owner and TW member which is always so helpful! Already found this thread because it sounds like we don’t have many popular options to fix our sag after the bumper/winch I’m adding. Hopefully this is the solution!

 

https://westcottdesigns.net/product/fox-trd-pro-lift-kit/

Since we're on this topic, can any suspension gurus explain how this kit works in layman terms?

 

I dont own this kit but from the looks of it, you disassemble the front shock and spring, remove the old spring perch (idk if its threaded on or a press fit) and replace with the thicker supplied spring perch to effectively preload the front spring granting some lift. It also looks like it comes with a top hat spacer that goes between the top of the shock and the shock mount. Then your standard block lift in the rear.

 

Literally case and point here:
Its dishonest Language gymnastics for a block spacer kit. Notice how they explain NOTHING how it works in a technical sense. Instead, they spend the entire product description refuting all the reasons one wouldnt want the product, all while its doing exactly what they say it doesnt do, through deception.
-do you see a longer shock shaft or longer shock body here? The answer is NO
So its a block spacer kit. period, except they move the block to the bottom perch instead of the top.

Its essentially pre-loading the suspension by adding those thicker pieces to simulate how a longer spring would pre-load the suspension without needing to move perch mounting points. (pictures are not clear, no technical info provided)

Here is the deception: they mean this all in a literal sense.
-The Kit will simply have LESS USEABLE travel, but it wont quote "limit" it (Limit it to what?) its a relative term.
-and by "extend the travel past factory" they mean, "will the shock shaft travel to a value it physically cant?" and the answer is NO obviously, because the shock shaft is remains a finite size and wasnt changed by the kit (duh).

it takes a little common sense and rational thinking.
-If springs cause lift, then why not just make a 16" spring, and give everyone "3 inches of Lift" they all clamor for? (OEM13" spring)
-If this ISNT A BLOCK SPACER KIT, then how on earth could ALLLL the factory parts stay the same (shaft, body, mount points), yet this mystery-kit just magically gets put on and nothing bad happens, no changes in travel, no changes in extension, and poof 1.5" of lift. It begs the question."Then what exactly IS the kit doing?" "HOW is it doing it?" "what are those items in your picture?"

Hopefully its starting to sink in to some readers exactly what this industry is doing. Remember the TRD PRO FOX™ suspension is equivalent to a level ~4ish kit. (2.5 front AND 2.5 rear) close to $2700-$3000. Please dont put dunce blocks on your truck.

 

Interested in seeing the shock stretcher

 

@LaggyEvo beat me to it. He is spot on. Cheap, cheap, cheap. The problem with their claim about not changing suspension geometry is false. By spacing the top hat and perches, the effective eye-to-top length changes and pushes the control arms down further in their arc.

 

@Ryan at Eibach, any updates?

 

Still a couple weeks out from test fit.

Like I mentioned before, we had a guy lined up who ended up flaking. We book our R&D calendar about 3 months out so it really screwed us on this.

 

Following.