Need help with BAD wheel hop (not worn bushings)

[Rays_240]

Ok so heres the deal. I have a 93 240sx w/ a stock turbo sr swap. My car wheel hops like you wouldnt beleive. It wont ever clean spin, even if I try to do a burnout it just hops. I went to the 1/4 mile the other day and the problem was really bad. I couldnt heat my tires up because it wouldnt stop hopping. Launching it was a joke, as was hopping all the way through 2nd. I managed a 13.1 @108mph but I could have been in the 12s if It wasnt for this hop. My list of mods pertaining to the issue are as follows
-z32 aluminum knuckles
-z32 n/a wheels with decent proper fitting tires
-z32 5-lug and brakes
-z32 lsd with aluminum bushings
-energy suspension subframe bushings and control arm busings
-Stance Gr+ Pro coilovers
-Stance RUCAs & Toe arms
-aluminum driveshaft
-nismo motor & transmission mounts
-OEM spec alignment

Now I would think that with these parts I shouldnt have much of an issue with wheel hop. What am I doing wrong/ what can I check or add to help out. When the car was bone stock it hopped also and after installing all of these parts over time the issue never resolved its self.

Also I do know how to drive and how to launch my car properly so please dont tell me how to drive my car.

[Rays_240]

anyone?

[kouki munster]

Make sure that everything is tight and that nothing has worked its way loose, also check the axles and wheel bearings for excess play.

Do you have the sub frame inserts or a complete bushing? If you have just the poly inserts they won't do much good if the stock bushings are completely shot. (rotting away or torn)

[Razi]

My car used to have some wheel hop, then I got some subframe collars and it went away.
But energy suspension bushings don't leave any space between the subframe and the body do they?

I'm not that well educated on wheel hop, so I'm not much help.

[OutToWinPAHC]

Wheel hop = IRS and vice verse

[Rays_240]

Make sure that everything is tight and that nothing has worked its way loose, also check the axles and wheel bearings for excess play.

Do you have the sub frame inserts or a complete bushing? If you have just the poly inserts they won't do much good if the stock bushings are completely shot. (rotting away or torn)

I got under there and double checked everything. All seems good except Im getting some clicking/clanking noise from my toe arms. they dont move but they make a noise when I tug on them.

My car used to have some wheel hop, then I got some subframe collars and it went away.
But energy suspension bushings don't leave any space between the subframe and the body do they?

I'm not that well educated on wheel hop, so I'm not much help.

I have the full bushings, they dont leave any room for collars

Wheel hop = IRS and vice verse

I know that IRS is prone to wheel hop but mine is excessive and I know that there are a lot of ways to minimize it.

[corn322]

You could try swapping in an S14 subframe. They where designed with less anti-squat than the S13 subframe.

If you don't want to go through that much work, I think the only difference between the two is the position of the forward mount of the lower control arm. You could weld a new mount with different positions to lower the mount by 1 or 2 inches. I don't know if this will cause the rearward bushing to bind or not.

[shanomak]

It definitely sounds like something is out of wack. Check all your measurements in relation to center, also check your spring rates with the coilovers set where they are. you are getting wheel hop due to the weight being transferred to the rear on launch which in turn flexes your chasis and suspension components. have someone watch the wheel when you launch and see if it is moving out of center. if you have a bad component then i think it should be evident once you do that. if not a bad component then try adjusting your springs one way and then the other. if nothing there then you have to start making other adjustments. mark the original location and then note rather it makes a difference or not in the amount of wheel hop. hopefully you can narrow it down from there. hope it helps.

[Rays_240]

You could try swapping in an S14 subframe. They where designed with less anti-squat than the S13 subframe.

If you don't want to go through that much work, I think the only difference between the two is the position of the forward mount of the lower control arm. You could weld a new mount with different positions to lower the mount by 1 or 2 inches. I don't know if this will cause the rearward bushing to bind or not.

I don't really want to swap in a different subframe and I would be kind of nervous about just changing mounting points on things.

It definitely sounds like something is out of wack. Check all your measurements in relation to center, also check your spring rates with the coilovers set where they are. you are getting wheel hop due to the weight being transferred to the rear on launch which in turn flexes your chasis and suspension components. have someone watch the wheel when you launch and see if it is moving out of center. if you have a bad component then i think it should be evident once you do that. if not a bad component then try adjusting your springs one way and then the other. if nothing there then you have to start making other adjustments. mark the original location and then note rather it makes a difference or not in the amount of wheel hop. hopefully you can narrow it down from there. hope it helps.

How exactly can I check my spring rates? I know what they are sup. to be according to stance. I have tried adjusting my dampening but I didn't seem to make much of a diff. I am deff. going to take some measurements and have someone watch from the back while I launch. The car does hop even from a roll when It breaks loose though and these coilovers don't allow for a lot of weight to shift to the back.