Nose Dive While Hard Braking!

[Jed]

You don't earn respect... you give it freely.

Your BS has grown tiresome.

And I think asking you to be respectful to others is definitely constructive.

Speak for yourself. For me, respect has to be earned.

And as for being constructive, the fact that you chimed in with no other reason but to make a personal comment to me is in no way constructive to the topic of this thread. Like I said, if you have something constructive to say, then feel free. Just keep it on topic and not personal.

 

[Jed]

Did you really just say that? lol, that's embarrassing!

Which part was embarrassing to you?

 

[rzldzlman]

To bring this thread back on track, it's odd but it seems that the nose diving I originally felt on my 4runner has nearly gone away. I'm not a mechanic, but it seems after the break in period I have felt it less and less. I really noticed it early even after moderate speed braking in city driving. After reading this thread, I went out and actually did some hard braking to test it and the improvement doesn't seem like it's my imagination or I'm simply getting used to it. I wonder if this will improve for everyone with time.

 

[eskimochaos]

Jed is a phaggot

/thread


And to the above poster that says its gone away. That is re4arded. You are only accustomed to the car now. Springs rates dont increase as time goes on.

The majority of these 5th gen owners sound like a bunch of uneducated women.

 

[Jed]

Jed is a phaggot

/thread


And to the above poster that says its gone away. That is re4arded. You are only accustomed to the car now. Springs rates dont increase as time goes on.

The majority of these 5th gen owners sound like a bunch of uneducated women.

Grow up, kid. Seriously.

 

[fxoffroad]

Lets try to abide by the forum rules. There's no place for that here. Thanks. --- Originally Posted by SeattleMike "My contribution: Jed, you are an obnoxious douche."---

An honest and truthful observation is very appropriate for this forum. I'm just surprised he didn't call you a troll.

 

[Jed]

An honest and truthful observation is very appropriate for this forum. I'm just surprised he didn't call you a troll.

Terrific. So far every post you made in this thread has nothing at all to do with the OP's topic. You seem much more fixated on me. Sorry, but you're not my type. Leave me alone and continue on your way.

 

[bobs4state]

There's a YouTube clip of a 2010 Salsa Red Trail where they do a road test including 60 - 0 braking and I remember thinking to myself how dramatic the nose dive looked in the video. So maybe the OP is on to something..... I realize the 4Runner isn't a sports car, but it sure seems to squat in the front and lift in the rear excessively during a panic stop.

Here's the video...go to 2:25 to see the nose dive. Maybe it's not as dramatic as I remember.

YouTube - 4Runner 4Ever: 2010 Toyota 4Runner Trail Grade Full Test

<object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/Wda0aoX2vcU&hl=en_US&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/Wda0aoX2vcU&hl=en_US&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>

I haven't noticed this issue at all. This is a large, heavy SUV. Why would we expect anything different? Most of the 5th gen owners are very happy with the performance of our trucks. A lot of the complaints and criticisms seam to come from 4th gen owners. Strange.

 

[Jed]

A lot of the complaints and criticisms seam to come from 4th gen owners. Strange.

Um....the complaint is from a 5th gen owner.

 

[I AM SAM]

Jed is a phaggot

/thread


And to the above poster that says its gone away. That is re4arded. You are only accustomed to the car now. Springs rates dont increase as time goes on.

The majority of these 5th gen owners sound like a bunch of uneducated women.

While you're bashing "uneducated women" you should probably take your daughter off your avatar....

 

[rook]

I haven't noticed this issue at all. This is a large, heavy SUV. Why would we expect anything different? Most of the 5th gen owners are very happy with the performance of our trucks. A lot of the complaints and criticisms seam to come from 4th gen owners. Strange.

bob,
4th gen owners are the likely buyers of a 5th gen. As a 4th gen owner, I am concerned, but not complaining, that I could be purchasing a vehicle that does not perform as well as the one it replaces.

 

[Carl_G]

This thread is definitely quite entertaining. Whenever I see a fifth gen now I watch when the driver brakes, imagining him without a seatbelt on trying to stay away from the windshield! I'm going to test drive one soon.

 

[1000MPH]

It's a long shot but it could be the rear brake pads were not doing their fair share when new. A few hard braking cycles on them and now the front/rear balance is better.

 

[fxoffroad]

Yawn. It's a SUV - not a car... at least we know...

All-New 2010 Toyota 4Runner Earns Highest Frontal Crash Test Rating from IIHS

TORRANCE, Calif., March 9, 2010 - - The Insurance Institute for Highway Safety (IIHS) today announced that the all-new Toyota 4Runner mid-size sport utility vehicle (SUV) has earned its highest ranking of “good” in their frontal offset high-speed crash ratings.

IIHS frontal crashworthiness evaluations are based on results of 40 mph frontal offset crash tests. A vehicle's overall frontal evaluation is based on measurements of intrusion into the occupant compartment, driver seat test dummy injury severity, and the level of restraint system dummy movement during the test. By comparison, frontal crash testing by the National Highway Traffic Safety Administration (NHTSA) is performed at 35 mph.

The IIHS is an independent non-profit research and communications organization funded by auto insurance companies.

All Toyota and Lexus models meet or exceed the safety requirements of the federal government and the NHTSA. Source.

 

[CJ3Flyr]

This is a great thread gone bad...

Clean it up or the whole thread will go away. That means not one single post about who said what that was not appropriate. The only posts after this one NEED to be about nosedive when braking...

 

[CJ3Flyr]

Now, nosedive...
Raising the front does seem to help regardless of lift methodology PROVIDED the rear isn't lifted or lifted as much as the front.

If the front is high the CG of the rear of the vehicle is on more of a horizontal line with front of the vehicle. Rather than the rear mass being behind & above trying 'roll over the top' of the front it's all in a similar longitudinal plane as the direction of motion.

I may have not written that well but it's the old sport-bike vs cruiser bike stopping thing... A low saddle, tall front-end cruiser, in the right hands, can go 60-0 in 115-120ft. The super sporty crotch rockets, in general, generate similar numbers in the hands of experts. The experience that's felt, front to rear brake proportioning etc is ENTIRELY different. (I have out stopped several sportbikes on my old Vmax because I understood this. Swapped bikes and out-stopped my Vmax on bike 'x'.)

On the 5th gen you can't change chassis geometry as radically as I was when switching bikes. All you can do is try to get the weight to stay closer to the static weight distribution during braking. The best way to do that is raise and stiffen the front. The brakes will automatically compensate and bias the rear more. My guess is a stock 5th gen with good coilovers set at 2" would shorten the stopping distance appreciably!
:cheers:

 

[philsey]

Whew! ... at last .... thanks Chris.

rzldzlman - I suspect that you, like me, have learned to brake a little earlier and gentler.

 

[CJ3Flyr]

Whew! ... at last .... thanks Chris.

rzldzlman - I suspect that you, like me, have learned to brake a little earlier and gentler.

I do brake a bit earlier but I have 1.5/.5 lift on my 4th gen that includes the FJC springs. It's really quite good in the nosedive regime. You would never guess by riding in mine that it's a low-tech, body on frame design. A little extra spring rate and a slight lift made a huge difference. It's no Z06 'vette or M3 in terms of braking dynamics but it's really good for what it is

EDIT: Philsey, I just realized you weren't talking to me but I answered anyways:bash:

 

[JB.]

Yes, 32 PSI on the door sticker. Any issue with this? Comments?

No, not at all, just a personal interest. Thanks for answering.

I'm really guessing that the truck is just breaking in normally...

Very likely. Just remember you have the model that should exhibit the least of this behavior.

 

[mckinley]

4th vs 5th on Nose Dive and Solution

I had a 4th gen and now a 5th gen. The 4th gen had some body roll and moderate nove dive. I replaced the suspension with OME springs (medium) and shocks and, no surprise, the body roll and nose dive were significantly less. The suspension was much firmer. The OME suspension made a night and day difference.

My new 5th gen (SR5) seems to have softer springs/shocks than my stock 4th gen. And, it definitely has significant nose dive. As others have mentioned, the simple (not cheap) solution is to replace the suspension (shocks and/or springs).

As soon as I can, I will put Bilstein 5100s on and I'm debating what springs to use (maybe FJ). This time around, I'm not going with OME because I'm not offroad that much and when I am it is more for mountain biking, kayaking, camping. I just want to level out the front and have a slightly stiffer ride. Like the 4th Gen suspension change, I expect that stiffer springs and shocks will reduce body roll and nose dive.

I'd appreciate it if anyone that has put Bilstein 5100s on with either existing coils or replacement coils, can comment on the changes in ride--did it reduce nose dive, etc. Also, has anyone used FJ springs on the 5th gen and what differences have you noticed?