RCCrawler Forums

Reflection · 01-31-2007, 08:33 PM

Quote:

Originally Posted by Chris85xlt

Thanks

I agree,I think the shocks need to be stood up more. I think if you use the tab above the lower link tab,it'd be better. You could also put them on the outside of the mount vs. the inside to spread the shocks apart some.

The uppers do look a good bit shorter than the lowers. Shorter upper links will roll the pinion down on droop creating a bad pinion angle. Running the same length or a hair longer uppers will keep your pinion out of the dirt

EeePee · 01-31-2007, 08:59 PM

The shock angle is definately out of wack.

EeePee · 01-31-2007, 09:02 PM

Quote:

Originally Posted by raptorman57

Shorter upper links will roll the pinion down on droop creating a bad pinion angle.

Or more importantly, keep the pinion angle facing the tranny on compression.

Chris85xlt · 01-31-2007, 09:17 PM

I moved the rear upper link higher on the chassis which created some squat to the rear end.

Left side of picture is the Front.

Chris85xlt · 01-31-2007, 09:17 PM

Quote:

Originally Posted by Cole82

Your upper links are to close together on the axle. Spread those apart Your running a ton of anti squt in the rear. I ould take those spacers out.

What does spreading the upper links apart do? will that lessen the torque twist?

Quote:

Originally Posted by 4stAir

i am guessing that you didnt follow the build sheet... those lower links look alot shorter than the recomended ones, also i found that 3.5 inch shocks on the front work best

how long are the lower links suppose to be for the J2-TT? The JunFac links are 4.75" rod end to rod end which gives me a 12" wheelbase at ride height.

yeah the shocks are abit long especially with the rod end added to the top of it

Cole82 · 02-01-2007, 05:57 AM

Quote:

Originally Posted by Chris85xlt

What does spreading the upper links apart do? will that lessen the torque twist?

They are at the maximum limit right now just a hair from being in a bind. It will lesson the stress on them.
I don't know on the torque twist it might. You don't need that much triangulation in your links.

WheelChair · 02-01-2007, 02:05 PM

http://mysite.verizon.net/triaged/fi...arLinkV3.0.zip

Play with this, helped me figure things a little better.

Chris85xlt · 02-01-2007, 02:50 PM

Quote:

Originally Posted by WheelChair

http://mysite.verizon.net/triaged/fi...arLinkV3.0.zip

Play with this, helped me figure things a little better.

sweet program! thanks

too bad i dont have my crawler here with me... :-(

ON THE FARM · 02-04-2007, 07:54 PM

ok, if you run a truck with arms backwards you do not have the traction that you do going forward. now with that being said what about the 4 link ste up?
if you have you rig set with a bit of squat in the front and a bit of anti-squat in the rear and it crawles great........... FORWARD, what about in reverse? if you try to back out of a hole then you will have a front flipping turd.... right? the direction you are going has a lot to do with you link set up.
what do you guys think?
i know we mostly are driving forward but that one time you need to get out of trouble.

EeePee · 02-04-2007, 08:38 PM

Quote:

Originally Posted by ON THE FARM

what do you guys think?

i know we mostly are driving forward but that one time you need to get out of trouble.

Personally, I find it totally unimportant. It'd be a compromise.

Nicklepimp · 02-05-2007, 04:27 AM

I have to say that I've learned a lot from this thread. Thanks guys.

I was using a torsion chassis on my 2.2 last year so i didn't have to worry about any of this. However, this year I'm going back to a 4 link setup. So now I've been experimenting. At first I had massive torque twist and could only climb a minimum angle before flipping. I've since toyed with link angles; it's amazing how a little adjustment here and there can make a huge difference. I've taken from Cole, and tried unsymmetrical link mounts and that's made an imrovement too. For my latest testing I'm trying internal reversed shocks in the front and standard shocks in the rear. It's definetly improved my break over point, but it has also slightly improved my torque twist. If I had a decent camera I'd post some pics. Oh well, the testing continues.

JasonM · 02-05-2007, 10:53 PM

I found this picture while searching google and it clarified a few things for me.

I found this on the same site, explains torque twist well.

http://www.raceglides.com.au/TechInfo.htm

IRON CHEF · 02-09-2007, 11:02 AM

How would the upper link placement on the axle effect the squat, comparing a clod where the links mount in front of the servo to a tlt where most guys run the upper links behind the servo??? The above diagram show the upper and lower links in center line of the axle

EeePee · 02-09-2007, 02:46 PM

You're still going to have the dashed lines converge into a point, the instant center.

Shorter links scribe a tighter arc, so maybe the instant center moves more when the suspension moves.

EeePee · 02-09-2007, 04:35 PM

Anyone want to guess what happen when I lowered the lower link at the axle?

JohnRobHolmes · 02-09-2007, 04:43 PM

Im gonna guess you get a bunch of squat when you peg it.

Reflection · 02-09-2007, 06:04 PM

Quote:

Originally Posted by johnrobholmes

Im gonna guess you get a bunch of squat when you peg it.

You are correct

Wait.....that is the rear of the rig right Eee Pee

EeePee · 02-09-2007, 06:16 PM

Yeah, the back.

EeePee · 02-09-2007, 06:59 PM

Two people...

JohnRobHolmes · 02-09-2007, 09:57 PM

I bet there are less than 10 people on this board that even know what AS is on a rig. The rest cant wrap their wee little heads around it

02-01-2007, 02:05 PM	#87
WheelChair Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods Posts: 661	4link calculator Exel required** http://mysite.verizon.net/triaged/fi...arLinkV3.0.zip Play with this, helped me figure things a little better.

02-09-2007, 04:35 PM	#95
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	Anyone want to guess what happen when I lowered the lower link at the axle? Attached Images

LinkBacks (?) LinkBack to this Thread: http://www.rccrawler.com/forum/general-crawlers/54791-anti-squat-suspension-tech.html
Posted By	For	Type	Date
• Afficher le sujet - Anti-Cabrage VS Torque-Twist	This thread	Refback	10-05-2011 03:42 PM

01-31-2007, 08:59 PM	#82
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	The shock angle is definately out of wack.

01-31-2007, 09:17 PM	#84
Chris85xlt Newbie Join Date: Jan 2007 Location: Glendora Posts: 28	I moved the rear upper link higher on the chassis which created some squat to the rear end. Left side of picture is the Front.

02-04-2007, 07:54 PM	#89
ON THE FARM Quarry Creeper Join Date: Aug 2006 Location: NORTH TEXAS Posts: 202	ok, if you run a truck with arms backwards you do not have the traction that you do going forward. now with that being said what about the 4 link ste up? if you have you rig set with a bit of squat in the front and a bit of anti-squat in the rear and it crawles great........... FORWARD, what about in reverse? if you try to back out of a hole then you will have a front flipping turd.... right? the direction you are going has a lot to do with you link set up. what do you guys think? i know we mostly are driving forward but that one time you need to get out of trouble.

02-05-2007, 04:27 AM	#91
Nicklepimp RCC Addict Join Date: Apr 2006 Location: Minnehopeless Posts: 1,129	I have to say that I've learned a lot from this thread. Thanks guys. I was using a torsion chassis on my 2.2 last year so i didn't have to worry about any of this. However, this year I'm going back to a 4 link setup. So now I've been experimenting. At first I had massive torque twist and could only climb a minimum angle before flipping. I've since toyed with link angles; it's amazing how a little adjustment here and there can make a huge difference. I've taken from Cole, and tried unsymmetrical link mounts and that's made an imrovement too. For my latest testing I'm trying internal reversed shocks in the front and standard shocks in the rear. It's definetly improved my break over point, but it has also slightly improved my torque twist. If I had a decent camera I'd post some pics. Oh well, the testing continues.

02-05-2007, 10:53 PM	#92
JasonM Newbie Join Date: May 2006 Location: Bay Area, CA Posts: 28	I found this picture while searching google and it clarified a few things for me. I found this on the same site, explains torque twist well. http://www.raceglides.com.au/TechInfo.htm

02-09-2007, 11:02 AM	#93
IRON CHEF Pebble Pounder Join Date: Nov 2006 Location: 303 Posts: 121	How would the upper link placement on the axle effect the squat, comparing a clod where the links mount in front of the servo to a tlt where most guys run the upper links behind the servo??? The above diagram show the upper and lower links in center line of the axle

02-09-2007, 02:46 PM	#94
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	You're still going to have the dashed lines converge into a point, the instant center. Shorter links scribe a tighter arc, so maybe the instant center moves more when the suspension moves.

02-09-2007, 04:43 PM	#96
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Im gonna guess you get a bunch of squat when you peg it.

02-09-2007, 06:16 PM	#98
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	Yeah, the back.

02-09-2007, 06:59 PM	#99
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	Two people...

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02-09-2007, 09:57 PM	#100
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	I bet there are less than 10 people on this board that even know what AS is on a rig. The rest cant wrap their wee little heads around it

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Thread: Anti Squat and Suspension Tech