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For those on 35s. The 3x16x500 front and 3x18x200 rear seems to be a good compromise. I am going to order some eibach springs and give this a try. I will report back. snacktime is fluent in engineering jiberish. He is on 37-38s so yeah he is gonna need extra lift. Best to do this with increased...

Yes, Most likely.

Lots of math and excessive details here. Easy to get lost. The point here is not the absolute numbers. Front/rear balance is 45.6%. That is a load of crap and I don’t even believe the exact numbers. Point is to understand basic phenomena and get estimates for things like front/rear balance...

Wouldn’t work out very well for you. I would drink your beer and hand you the empty.

some more refined numbers for front/rear balance wrt roll for oem SAS. Increased resolution using instant roll centers. Front/rear balance: using 500/200 spring rates w/ oem front and rear sway bar, 0.38 w/ oem front and no rear sway, 0.53 w/ no front or rear sway bar, 0.21 DETAILS...

A reality check on the torsional resistance numbers. pulling 0.5 G’s in SAS is kinda intense. At 5000 lbs minus unsprung 700 lbs (300 front and 400 rear), with CG height of 30.5”, the torque is 4300*0.5*30.5= 65.6k torsional springs are in series (front, frame, and rear) so they see the same...

Just attached plot to previous post. I did that a couple years back when I replaced the struts. Just estimated measurements with a tape. I did include the sway bar arm bending resistance. If you can send the (x,y,z) coordinates I can revisit that and get it very accurate (<5% error for sure)...

Some thoughts and numbers on front/rear balance for rotation about for-aft axis. This affects articulation and anti-sway. Attached is a plot of sway bar forces vs wheel displacement for bar diameter of 1 3/8” (oem front) and 7/8” (oem rear). This is fairly accurate, simple torsion bar response...

some numbers on front/rear balance that I am using. Just considering static weight; balance = ( Kf * Df ) / ( Kr * Dr ) where Df and Dr are respective distance to front and rear axles from CG. Kf and Kr are effective wheel spring rates. Front motion ratio is about 1.6 and rear about 1.1 at SAS...

so the eibach springs fit nicely? No issues I guess? since you swapped springs, did you measure free length on th 4WP springs?

according to accutune the fox springs are 365/185 front/rear. I would like to experiment with some slightly softer springs also. I am going to be on 35s for a couple of years. I would like to do linear springs something like 500/200. do you still have your oem springs? When I swapped mine to...

It is interesting that the 4WP coilovers have some of the lowest fully compressed lengths both front and back. a lot of the typical coilovers for running 37s (king/fox/acutune) have significantly greater compressed lengths (>1”). I think they are conservatively trying to keep the tires out of...

yeah the $400 ones are oem axles. I meant the $2800 ones. Haven’t seen those before.

I have a 4dr non SAS. I also have the procomp coilovers. I was surprised to see they have a 600 lbs/in spring rate in the front. I bought an oem rear sway bar to go with this setup. Was also going to drop the front sway bar diameter. Haven’t installed anything yet to see how it is sitting. I...

for $2800 with the M210, I can break 6 oem cv axles at $400 and still be ahead. anyone know anything about these?

Spring rate, length, and static weight at the corner will dictate compressed length. Assuming you are reusing the same spring this should all be the same. compressed spring length, perch collar location and shock extended length will dictate ride height. You can match the perch collar location...

@Daniela at 3W Auto Life thanks. Just ordered some floor mats.

says the guy building his own suspension and questioning the location of the rear torsion bar. Most everyone else on the planet: man am I getting tired of working on this rig. Let’s just mount the torsion bar here. But dude are you sure we should attach it to the rotating wheel? Don’t worry...

You didn’t move the inner CV pivot point, the axle length, or the UCA/LCA pivot points, so your CV plunge stays pretty clean. Stock CVs can handle +/- 10 mm of plunge (from a very reliable source). I am starting to question the timeline for CV breakage. Didn’t it really occur during last two...

Super cool videos. Not seeing too much jounce travel in the front from video. Looks pretty balanced, maybe slightly skewed towards rebound. the math works out such that you should have CV axle angles ranging from 26 deg max jounce and -29 deg max rebound. At the limits of the RK shocks. Of...