View Single Post
Old 09-15-2021, 02:37 PM
Endle55_5earch's Avatar
Endle55_5earch Endle55_5earch is offline
Member
 
Join Date: Jan 2019
Location: USA
Posts: 132
Endle55_5earch will become famous soon enough
Endle55_5earch Endle55_5earch is offline
Member
Endle55_5earch's Avatar
 
Join Date: Jan 2019
Location: USA
Posts: 132
Endle55_5earch will become famous soon enough
Quote:
Originally Posted by Jetboy View Post
In the 1.5-2" lift range there's a little bit of trickyness in alignments. The problem is that the UCAs add about 4 degrees of caster. At 3" of lift that's what you want. Half way in the middle, it's maybe too much - and by that I mean you can get great alignment, but at 4* caster you won't be maxing out the caster available on the lower control arm tabs - so you won't be pushing the tires as far forward away from the body mount as you would with stock arms.

I recently lowered my suspension back to around 1.5" lift and put the stock UCAs back on. (I have some JBA arms I used at higher lift). The reason was what I explained above. At 1.5" lift front I had to either run 6-7* caster to max the body clearance or pull it back to 4*. Not a problem with 33" tires, but with 34" tires it can rub a little. So I swapped back to stock UCAs and set around 3* caster, but better body clearance. The stock UCA locates the upper ball joint further forward as well. So the net of the lower height is that - oddly - at the lower height I think I might even be able to squeeze 35's. If I had a set I'd bolt em on and see if they fit.

I'm doing a lot of highway miles lately that prompted the lowering. The ride is noticeably better at 1.5" than 3" lift on long road trips.

Overall though - I'd say no question the higher caster is nicer all around for driving. Once you get below about 2* the steering wheel feedback sucks and it doesn't want to track very well. After messing around a lot with mine - I think 3* is okay, but around 4-4.5* is close to ideal.
So, If I'm understanding correctly, at a 2" lift (and higher) I'm good to put on the JBA UCA's but if its under 2" lift I should keep the stock UCA's?

The FJ PRO Springs (14" long @ 600lbs) is supposed to give a 5th Gen T4R a 2.5" lift stock front and a 2" lift with Lo-Pro bumper + Winch. I've gathered this info from the forum and have the FJ PRO Springs and JBA UCAs in the garage waiting for install.

I daily drive my T4R but travel to the mountains (Just recently did Alpine Loop in the San Juan Mountans, CO) so I wanted a "modest" lift that's good for highway driving and the week-long off-roading vacation.

I appreciate the nuance in your response. Thank you for your help!
__________________

"HANZO" 2015 TRD PRO: SSO Front Bumper w/ Stage 2, SCS F5's (17x9-38), 285/70/17 Falken Wildpeaks, 2" all-around Dobinsons IMS, JBA UCAs, Slee Sliders, BMC, Warn Winch, LED High/Low, DD SS3 Fogs, Rigid Lightbars (Amber/White light), Nise Rack, Extended Diff Breather. Road Trip 2021 - YouTube

Last edited by Endle55_5earch; 09-15-2021 at 02:40 PM.
Endle55_5earch is offline   Reply With QuoteReply With Quote
 
Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 03:51 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020