Eibach Protruck 2 Science Experiment

Less than what?

 

@gudujarlson is sitting at 25.5 down

I'm at nearly 25 down

And you're at 24.5 down.

That's a full inch on range of motion missing, potentially limited by shock length.

Tomorrow or tonight is science day for me, I'll measure how much more downtravel I could get by removing lower strut bolt.

Theoretically, it shouldn't be more than 1/4 to 1/2 further at the bolt, however it could be a full inch if these coilovers are "short."

 

Ah yes.

100% limited by my shock.

 

It looks like you are going significantly faster than 2mph and I didn’t see you catch any air. Otherwise I hear nor see anything unusual in your video. There is a lot of background noise though and I watched it on my phone.

 

It’s funny cuz originally I wanted 5100s, but the shop I trusted recommended OME. Guy said that the 2” OME lift kit was “designed” for a 3rd Gen.

Wish he mentioned that Nitrochargers are stock length. But that’s kind of my fault for not researching more, I’ll be smarter next time.

 

Real dumb question but did anyone try lubing the coil seats? That really just sounds like coil shift not top out in the video.

 

24.5” is probably close to stock. Your shocks aren’t “short”. It shouldn’t be a problem. You might be chasing a red herring.

I have extended length king shocks which I think have about 1” more travel than stock shocks thus my full droop is 25.5”. I never measured my truck with stock shocks though.

Also note that hub to fender measurements have an error of +/- 0.25” in my experience. I might get more repeatable measurements if I put tape on the hub to mark the center. YMMV.

 

The droop on 5100 with 885 coils on 0 setting is the same as before mentioned OMEs ~24.5".
Last night I did 3 speed bumps back to back at 40 mph for the science. 5100 don't clunk

 

Quite possibly a red herring then.

The squeaks and such aren't what I'm chasing, it's the knock sound in each clip. It's quite in the vids, but if I make another from inside the sound is significantly worse, and you can feel it in the wheel/pedal/seat etc.

After swapping coilovers (same ones from eibach) the side that had issues changed, and this issue was never present on stock coils.

I do understand the risk testing this, that is, going from "potentially topping out" to "risk of bottoming out" the shock, which would destroy them. I'll compress and make sure the bumpstops are preventing bottom out.

 

There is another long post on here about them, they had the same issues with them.

I have installed the stage2 shocks on a few Toyotas now. They just don't ride well when you have a lot of lift in them bc of the lack of down travel. I suspect that they are not really extended travel shocks compared to Bilstein 5100's. But I have not been able to track down their extended and collapsed measurements.

They are valved a little softer than the 5100's.

I would measure your down travel left in the shock by measuring center of hub to fender when its on the ground and then again when its lifted from the frame. 2" is the bare min, and 3"is better.

 

Yeah, have measured this

I'm also very active in the other thread.

I'm just testing a solution is all

 

In theory, if what you're experiencing is indeed the coilover topping out the spacer will help. You should take actual measurements of the shock shaft though at full compression/extension so you know exactly how much travel your coilover actually has. Only then will you know 100% it's the coilover and not something else.

 

Just measured mine,
21 1/2 at ride height and 24 3/4 full droop.

When I installed these I took out about 5/8" of preload.

Out of the box



As currently installed



I read about the clunking issue before I got these and for awhile I thought mine wasn't affected. I haven't driven it very hard but did hit a section of whoops at an orv park hard enough I thought would it would clunk if it was ever going to but it never happened, thought I was good to go. About 3 months later on a small trail I hit a water bar hard enough to toss the front end up sharply and heard the clunk for the first time and was able to reproduce it repeatedly.

 

Makes sense since you lowered it down a bit.

I'd imagine if you ran it out of the box you have that issue more often.

 

You know the Bilstein 5100 specs are good. As long as yours are 1/2" or more shorter extended length, you will succeed. Nothing to lose really if no other options, go for it man.

 

Potentially bad news boys.

I was turning the wheel while parked in the garage to straighten things out, and noticed a knock.

Had someone help while I went under to look.

Doesn't look like it's the bushings for the rack, and isn't coming from the ball joints.

Definitely coming from the driver's side of the rack.

https://youtu.be/u65ue2v2EEs?si=l5hz0VvjUBi0Lu-H

In the vid you can see the rack move, but I don't think that's abnormal per se. Seems like something inside is borked.

I'm at 63k miles on a CPO that I picked up @ 20k. Probably SOL and will need to replace it myself, but that may be one of the sounds I hear/feel

Resuming science, going to measure travel and shock length etc etc

 

Coilovers measurements

~22 Full droop on truck

20 1/4 As compressed as I could get it, jack won't go higher. Need a block.

Removed lower bolt, I can push the hub down about another 1/4-1/2 inch before it stops, it does "rebound" back up tho.

Going to find a block and update compressed #. Since the IFS is limited by coilovers in my instance, I should be fine to install a block above the coilover.

Pics are as it rests, and pressing down on the hub.

 

That rebound will be the bushings releasing the tension. If you intend on running it in this manner you will want to loosen the can bolts at ride height and re torque the so the bushings will adjust to the new ride height.

 

Sounds good. I'm going to measure the spacer and ensure it's between 1/4-1/2, then lower the adjustment nut on the coilovers by the same amount. (After checking max compression first, need to find a block)

 

Installed SuperBumps while I was down there.



Measured spacers to ensure proper size, looks like they are 3/8 and not 1/2.

This is fine, as it's in-between both sizes. I'm fine with that.

Breaking for lunch then I'll compress/make decision on installing spacer/lowering coilovers.



Also checked how much thread I have available on the coilovers, should be fine I believe.