How fast do you drive?

They don't sweep at startup. Not my pic but someone had posted it on FB.

 

Gotcha. That was my best guess

 

Got the car 300 miles ago, most of it highway. Cruise control set 75 seem like a happy place for the truck between speed and fuel econ.

 

jeez! I assumed 4runner doesn't go that fast, have never really tried it past ~89 mph.

 

That was stock suspension and stock size 265/70R17 tires. IMO these are pretty impressive machines for what it is as long as you don't lift them too high and make them too heavy.

 

This, and If you're on a fairly short trip, you really don't save much time either.

 

Where do you live? Visit Montana or New Mexico and you will have no choice but to do 90 mph for hours lol

 

I have found the best fuel mileage is cruising around 45-55, part throttle in overdrive, i can see as high as 26-28mpg instant fuel mileage
When running the highway i run about 70, staying around 70 gets me about 19-20
Speeding up to 7-8mph over the limit around 77-78 gets me about 15-16

 

Are you literally going 80 MPH at 19 PSI, and taking your hands off the wheel to take pics?! You have a death wish. And why not run everything at 19 PSI, does the steering get squirrely at 19 PSI in the front so you bump it to 24 up there?

 

I am running 305/50-20 General ATX and this is what pressure is required to allow the face of the tire to run flat on the ground.
The front is 24psi because of the extra front weight bias due to the engine
The rear is 19-20psi because of how much lighter the rear is, it only requires 20psi to keep the tire running flat on the ground
I have been running combos like this for 10+ years and posted about it many times and much like you, people swear it cant be done simply because the books tell you the tires should be at 40psi.
I have 105,000 miles on an identical set of tires on my daily driver and the tire pressures are 26-22 on it i believe.
No they are not squirrely, they are quite planted and this is how i drive daily and the tires are fine and the sidewalls are not hot. In fact, i have driven from Ensenada Mexico to Miami and back to Mississippi pretty much non stop over the course of 7 days without worry on the 4runner with 105,000 miles.

 

2004 v8 Limited, don't do it often but if i get up to 80 for some reason it still feels super smooth and planted. I do have a very new Dobinsons IMS suspension installed, however.

 

I rarely get over 55mph on my daily commute.

 

Tire pressure should always be measured cold. With stock size and load range, you should be at 32 cold.

That's not the governor, that's reality.

 

This sounds like it could be your issue. It sounds like your dampers aren't damping.

 

34 cold is fine. I'm just saying that it should be measured cold.

I don't know anything about that KYB setup. But, shocks with lousy damping certainly won't help with handling on a vehicle that tends to feel less than sporty to begin with.

I've had mine over 100 MPH a few times, and hit 90+ plenty, even on oversized tires. It's not exactly sports car handling, but it shouldn't be scary to pass someone.

 

I'm in Rhode Island, the fastest speed limit we have is 65, most are 60 or below. I believe New Hampshire and Maine have 70 mph speed limits in certain areas.

If I lived in an area that the average speed was 90 mph, I wouldn't have bought the 4Runner.

 

in south Florida when you cross north of West Palm Beach toward Jupiter. The highway opens to 5-6 lanes and left lane cruising speed is easily 85 and up.

 

You would have regeared to 4.88 then

 

Are the front and rear anti sway bars still intact? Are the ASB links and their bushings in good shape?
Your KYBs may not be the best shocks, but the wrong spring rates front and rear will make them spongy as hell. And if the KYBs aren't providing proper damping, the wrong spring rate gets exponentially worse.
I installed some King rear shocks years ago that were a Tacoma spec. They were massively under valved for the weight of the 4Runner.
It wasn't until I learned how to revalve them, did they perform properly. It was sketchy as hell. As the rear would squish around the truck would wander and sway just going over the transition of a bridge, not to mention heavy wind, pitch changes in the pavement or any quick course corrections.

My long winded point is that your components may not be rated and matched properly. You might try and research what your spring rates are, and maybe try and find the part number of your KYBs to see if they might be spec'd for a 2wd Tacoma. Your rear springs could be shot as well.

Up coming Labor day sales might be a consideration for some replacements.

 

Speed limit. Rarely more than 1-2 over. Lots of tickets as a teen, learned my lesson.

My 2024 TRD Pro handles like an under powered boat. Just kinda floats around on the interstate. But I’m also coming from a sporty small car, so my opinion is subjective.

 

700# would be way too stiff unless you have added weight. Both my 4th and 5th gens have a 600# rate. 5th gen is at its max with bumper, winch, skids, sliders and 2 battery's. But the Kings were valved to accommodate this weight. However, If I pull compression out of the reservoir adjusters, it will bottom out. So I keep them in the middle of their range and then adjust for cargo or terrain. So with a standard coil over like eibach, bilstein, ome, etc, heavy additions like bumpers and winch, would possibly require a 650 to 700# spring.
Here is a video of the 5th gen w all the added weight on her 600# springs in the middle compression range for the adjusters. She rarely bottoms out.
https://youtu.be/qZFlm1ccn_4?si=rkSR9GxebZE9rp5n

 

Nah it’s the governor lol.
You can tell when it kicks in

Can easily cruise at 112 but any faster and the governor kicks you back down

 

That would be true if your goal is just to avoid bottoming out on a fire road. However, as the OP's goal is to reduce brake dive and body roll on pavement, 700# springs are more appropriate. 4th gen with the iron block V8 is quite heavy. Stock they weigh as much as a modded Tacoma. The standard spring included in Elka coilovers for 4th & 5th gen is 700#, for example.

 

Traded in a GLI for the 4Runner and half the time I drive my wife’s Model 3 lol I feel your pain

 

Yes the governor is in place because some trims come with S-rated tires.

 

Where are you cruising at 112?

 

Dude

 

Agree to disagree, I have no body roll or brake dive on the hwy or on a fire road. This truck is heavy at 5900 lbs fully loaded. There is no way the front end on a stock 4th gen weighs as much as this truck with a full steel bumper, winch, full skids, 2 batteries, and an ARB compressor. I also have a 4th gen with an iron block V8 that was on 600 springs, until I put a LT on it. It rode just fine with no bottom out. It's a completely different animal on LT now, so its not in any way comparable to a stock 4th gen.
Elkas are not a true 2.5" diameter shock, so the piston is not doing as much damping as a King true 2.5". The 700 springs compensate for an undervalved shock. Elka has obviously found a happy medium for most people, because there are plenty of happy people running them. But imo a stock 4th gen hitting a speed bump on a 700 spring, would be very uncomfortable.
At this point the performance and stiffness differences between these springs would be mostly objective.
OP could also look at duro bump stops or Super bumps to replace the factory pucks if he is concerned with bottom out.
Ben at Filthy Motorsports recommended the 600 springs on my 5th gen which really surprised me with all my added weight, but I'm extremely happy with it.
Elkas on 700s could very well work well for OP also. But, there are many stories of 700 springs being too harsh on many different setups. There are vendors that will swap in a 650 spring on your Elkas also.
Good Luck OP. Hope you find your sweet spot.