Builds Project 200 (3 Viewers)
- Thread starter bjowett
- Start date
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What about rear springs?
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The braking of individual wheels is also the CRAWL system.
Yes, CRAWL is like a low speed cruise control, but it regulates the amount of slip allowed at each wheel.
When that allowable amount of slip is exceeded, CRAWL brakes the slipping wheel and directs torque to wheels that are not slipping.
All that within a certain speed range selected by the five position rotary switch.
Most videos of CRAWL in action show a LC200 making it up a rocky slope at a steady pace with the driver having to do nothing bu steer. While this is certainly one use for the CRAWL system, I think it seriously understates the capabilies of the system and misleads us into thinking of it as something a neophyte might use.
In my view, the greatest advantage of the CRAWL system is in freeing a stuck vehicle. When totally bogged down in sand, for example, engaging CRAWL mode will allow the vehicle to free itself when, arguably, it could not have done so in the absence of the CRAWL feature without the help of another vehicle or a winch. It does this by controlling the amount of torque delivered to each wheel independently based on the amount of wheel slippage at each wheel.
Here is a great video showing what I'm talking about: http://www.youtube.com/watch?v=nRWBX-YxFfg&feature=fvwp
The vehicle is stuck up to the axles in sand and unable to free itself.
At 1:52 in the video, CRAWL mode is turned on and with no other intervention by the driver than steering, the vehicle proceeds to free itself.
That, to me, is an amazing feature.
Ok that is awesome....I am SOOO getting stuck this week in the sand!!
Sick build. Subscribed for future awesomeness.
And, you guys are all correct about the CRAWL. It basically uses all the other systems in the truck (ATRAC, Traction control, ABS, etc) to assist with rough terrain or to get the vehicle out of a situation like the sand. It's well beyond my technical ability to fully explain how it works but it does moderate throttle and use brakes on individual wheels to accomplish this.
Edit: Here's the Toyota video for the 2010 4Runner. Not very technical but you get the idea.
[YOUTUBE]ZRwny2KETnw[/YOUTUBE]
And, you guys are all correct about the CRAWL. It basically uses all the other systems in the truck (ATRAC, Traction control, ABS, etc) to assist with rough terrain or to get the vehicle out of a situation like the sand. It's well beyond my technical ability to fully explain how it works but it does moderate throttle and use brakes on individual wheels to accomplish this.
Edit: Here's the Toyota video for the 2010 4Runner. Not very technical but you get the idea.
[YOUTUBE]ZRwny2KETnw[/YOUTUBE]
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And it works awesomely. I got stuck quite a few times in the Imperial Sand dunes near Glamis. Each time I activated CRAWL control and sat there while the truck un-stuck itself each time. I didn't get to use my shovel or Maxtrax
I am hanging on this build like a hawk on a field mouse... Have a few Expos under my belt with my FJ, and am left with needing... More HP, More Room, and something more comfortable for 15 hour days in the seat and the ability to bring the family with in more comfort! The 200 Seems to be perfect, but lacks the suspension articulation and ability to fit 35" tires that are needed to be super capable at very technical terrain.... Hence your Long arm Tundra arms should do the trick, im just curious about the fenders and what is going to happen to them!
So the tundra Track width is 3.5" wider total, 1.75" per side. Why not run a Spider Trax 1.5" spacer in the rear so you don't have to mod the hell out of a rear tundra housing that has perches for Leaf springs? Other Motives? What is gonna happen with the rear fenders ?
Do you end up using the Stock Tundra CV's If that is true that would be awesome because parts are everywhere, unlike long travel CV's on other trucks.
Waiting with bated breath....
So the tundra Track width is 3.5" wider total, 1.75" per side. Why not run a Spider Trax 1.5" spacer in the rear so you don't have to mod the hell out of a rear tundra housing that has perches for Leaf springs? Other Motives? What is gonna happen with the rear fenders ?
Do you end up using the Stock Tundra CV's If that is true that would be awesome because parts are everywhere, unlike long travel CV's on other trucks.
Waiting with bated breath....
bjowett
Supporting Vendor
- Thread starter
- #70
Yes, 3.5" wider, total. My 33.3" BFG KM2 on stock offset TRD Rock Warrior wheels should just sneak in the wheel wells.... might need to roll the fender lips, guess we'll see. If you want to fit 35" tires, the big fender flares that the icelandic outfits offer will work, they use a mega offset wheels to widen the track, though. I like wheels with offsets that are stock, or close, if possible. They keep everything operating properly, wheel bearing loads, scrub radius, bump steer, etc. I've been waiting on the machine shop, hopefully I will have something to show soon. I will mention that the Tundra housing is no longer being used, nor will wheel spacers be used.
Ohh that is awesome! Love that its built into the axle and not aft the stock bearings! I can't wait to see this mature out.. 12-13" of wheel travel most likely from the king / Ohlin / Icon Shocks up front ?
Do you know if the rear link arms are same length to that of the FJ / 4runner 120 series chassie?
Do you know if the rear link arms are same length to that of the FJ / 4runner 120 series chassie?
Update?
Im thinking the parts list is like this...
Tundra UCA or Tundra Aftermarket UCA
Tundra LCA
Tundra Axle CV's
Tundra Coilovers of choice
Possibly longer break lines and ABS/ wheel sensor line?
Tundra Steering linkage.
Anything else for the front conversion?
Im thinking the parts list is like this...
Tundra UCA or Tundra Aftermarket UCA
Tundra LCA
Tundra Axle CV's
Tundra Coilovers of choice
Possibly longer break lines and ABS/ wheel sensor line?
Tundra Steering linkage.
Anything else for the front conversion?
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Brian, can you give a synopsis of what all you're doing? I.e. what the objective is for the final build?
Also, you showed the new rear axle housing and listed it as a 9.5" diff. Do the 200's still use the 9.5" diff with the 5.7?
Also, you showed the new rear axle housing and listed it as a 9.5" diff. Do the 200's still use the 9.5" diff with the 5.7?
bjowett
Supporting Vendor
- Thread starter
- #77
Apologies for the typical long delays.
Arya, basically this rig needs to do it all w/o compromising running the kids to school everyday. Toyota left a hefty helping of obtainable performance on the table with this machine, especially in the suspension and chassis. Yes, the 200 still uses the 9.5, but just like the late build 100 (2007), it has the larger diameter 1.28" pinion gear splines.
Now, where to mount this?
Arya, basically this rig needs to do it all w/o compromising running the kids to school everyday. Toyota left a hefty helping of obtainable performance on the table with this machine, especially in the suspension and chassis. Yes, the 200 still uses the 9.5, but just like the late build 100 (2007), it has the larger diameter 1.28" pinion gear splines.
Now, where to mount this?
I'll be building an exhaust for the 200 this spring. Nomally, I'd grab a Borla muffler or two, a bunch of 304 tubing, and have at it. This time around, a TRD Tundra Muffler will be dissected... why? Proven gains which can be improved upon. The most common complaint with the early TRD system is.... it's too quiet!Perfect for Land Cruiser duty! I can build a nice drone free system based on this tuned for 5.7L muffler, too bad it's built from 409 series stainless. A copy from 304 will work well. If there's interest in this, I'll give its own thread.
Video of sound
Don't know if you did this yet.. But I axed my tundra TRD exhaust because it droned at highway speed.. Went corsa sport and never looked back.
Based on all the Tundra parts replacing LC parts are Tundras more of a heavy duty vehicle then the 200 series?
