[Ol Bird]

Installed Moroso front drag springs yesterday, and noticed upper control
arms not moving very easy. After reading up on this seems like the delrin bushings are the way to go. Have any of you used these and the results. Going to try and lube these for right now. Trying to get a little better weight transfer at track. Forgot, have the polyurethane in there now.

 

[Schurkey]

If Poly bushings aren't moving freely, I'd be checking the control arms to see how bent they are.

Control arms are easily bent in severe use, doubly-so when someone "forgets" to install the rubber bump-stops.

Control arms are also easily bent when some bonehead doesn't use the proper procedure and tooling to press the bushing shells out and back in. Almost no-one fabricates and uses the inserts to prevent the press from bending the control arms as the shells slide in.

 

[Calculated Risk]

Poly bushings should be fine. I use them and my control arms are floppy like dog ears. It just takes some attention to detail to get them moving freely. There are alot of threads on here about the subject.

I pressed my bushings in 16 years ago without any special tooling and didn't bend anything, i wouldn't jump to the conclusion that they are bent till you try the other tricks.

 

[BillyGman]

Installed Moroso front drag springs yesterday, and noticed upper control
arms not moving very easy. After reading up on this seems like the delrin bushings are the way to go. Have any of you used these and the results. Going to try and lube these for right now. Trying to get a little better weight transfer at track. Forgot, have the polyurethane in there now.

I think you'll need to double-nut them using two jam-nuts tightened up against each other so the inside one can be merely finger tightened without it walking. That is better for drag racing than using the one OE lock nut, and torqueing it to the 70 ft/lb spec. The latter method causes the binding with OE type control arms.

 

[aukai]

The OE bushings have serrated teeth also, Moroso used to sell them after machining them out.

 

[Ol Bird]

Update. Removed upper bushings and relubed , loosen lowers and double nutted them. Cut upper bump stops down to about 3/8" . Remeasured and have 4 3/4" of travel now compared to the 3" it had in the front. Took it for a test ride , and surprised how much different it felt. Might take a couple of runs to get use to front lifting this much . Hope I can finally get this thing to hook up at the track.

P.S. Keep an eye on valve stems. Didn't have the bolt in style on the front, had flat right when I got back to the house. Checked other side and it was dry rotted as well. Told my son I felt a vibration so let out of it.May have got ugly if it had went down when we were up to speed.