Reply
 
Thread Tools Display Modes
 
Old 02-11-2015, 02:12 PM   #1
Junior Member
 
Join Date: Jan 2015
Posts: 26
Lifts and the RCS system

Am curious if there are problems with some lifts and RCS system on newer vans. I have a 2011 e350 with RCS and just put on 265/70/17 wheels and was thinking of doing maxlift or moog springs. Van is already sitting taller from the tires ( doesnt rub at all)and going 2 more inches will the rcs system react to the lift? Or has anyone experianced any problems with that set up in newer e350's?
__________________

chavez is offline   Reply With Quote
Old 02-11-2015, 07:19 PM   #2
Senior Member
 
LeadDoggy's Avatar
 
Join Date: Aug 2008
Location: Thousand Oaks, CA
Posts: 291
Re: Lifts and the RCS system

As long as you don't pit a lift on it that requires a different pitman arm you'll be fine!
__________________

__________________
07 E350, Custom and Lifted
08 Harley Davidson Street Glide
09 KTM EXC 530
LeadDoggy is offline   Reply With Quote
Old 02-11-2015, 08:41 PM   #3
Senior Member
 
UJOINT's Avatar
 
Join Date: Feb 2009
Location: AVL NC
Posts: 972
Re: Lifts and the RCS system

I can't speak for any 2wd lifts but our 4x4 swap gets a longer pitman arm with 6" lifts and we've got a lot of functioning RSC vans running around.
__________________
Chris Steuber
02 E350 7.3 (V4)
05 E350 V10 (V7)
17 Focus RS,90 SHO,49 Willy CJ2A
ujointoffroad.com
UJOINT is offline   Reply With Quote
Old 02-12-2015, 07:11 PM   #4
Senior Member
 
boywonder's Avatar
 
Join Date: Jul 2013
Location: So Cal
Posts: 2,996
Re: Lifts and the RCS system

I have a 4WD conversion E350 with RSC (2008) with about 3" of lift and 285/70-17 tires, no RSC issues.

If you go with an Action Van lift kit, there is a special pittman arm for RSC equipped vans.
__________________
2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2000 KTM 200 EXC
2003 Honda Element
boywonder is offline   Reply With Quote
Old 02-12-2015, 11:56 PM   #5
Senior Member
 
BajaSportsmobile's Avatar
 
Join Date: Sep 2011
Location: Rancho Nuevo (Cabo/Todos Santos) B.C.S. and San Diego, CA
Posts: 1,952
Re: Lifts and the RCS system

The 2wd lift the OP is considering will not result in any problems or require a different pitman arm - there should be no problems. Initial alignment will be your biggest concern.

On the subject of RSC and pitman arm length:

RSC compares the driver's intended direction (determined through the measured degrees of steering wheel angle) to the vehicle's actual direction (determined through measured lateral acceleration, vehicle rotation (yaw), and individual road wheel speeds).

The issue with extended pitman arms is the relationship between the steering wheel angle and the actual steering input is changed. The same degrees of steering wheel movement, results in a greater steering input with a longer pitman arm. Where 20 degrees of steering wheel rotation with a stock length pitman arm may result in X degrees of actual turn, the longer pitman arm may result in 2X degrees of turn.

If the system senses that you are going around a turn that requires a certain degree of steering wheel angle, but because you have a longer pitman arm it only measures a fraction of that anticipated steering wheel angle, it will think that you are outside the parameters (out of control) and will activate the RSC system functions. It gets confused because the steering inputs doesn't match the result.

The reasons Ujoint's longer pitman arm works in his 4x4 system, is that it is matched with the rest of the steering components, primarily the length of the steering arms on the steering knuckles; all working together to produce a result that falls within the RSC's acceptable parameters.

Action Vans has also found one that works with their system.

We too have different pitman arms for different configurations.

If you have the wrong one - you will know it right away!
__________________
Four time Baja 1000 winner, four time Baja 500 winner. Solo'ed the Baja 1000 to LaPaz/Cabo twice.
4-Wheeling since 1972, Desert Racing since 1989.

AgileOffRoad.com
BajaSportsmobile is offline   Reply With Quote
Old 02-13-2015, 10:26 AM   #6
Senior Member
 
boywonder's Avatar
 
Join Date: Jul 2013
Location: So Cal
Posts: 2,996
Re: Lifts and the RCS system

Thanks for the explanation Ramsey!
__________________
2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2000 KTM 200 EXC
2003 Honda Element
boywonder is offline   Reply With Quote
Old 02-14-2015, 08:57 AM   #7
Junior Member
 
Join Date: Jan 2015
Posts: 26
Re: Lifts and the RCS system

Thank you much for the info fellas. Guess I'll order the parts I need and get started.
chavez is offline   Reply With Quote
Old 04-09-2015, 05:35 PM   #8
Senior Member
 
Zeta's Avatar
 
Join Date: Apr 2010
Location: Preston, ID
Posts: 1,213
Send a message via Yahoo to Zeta
Re: Lifts and the RCS system

It seems my '06 SMB conversion has a longer than stock pitman arm--anyone know what it's from? It has Ford casting numbers BTW.

Z
__________________

__________________
'06 RB50 SMB Diesel

http://www.tomsinclair.net
Zeta is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 10:40 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×