Has anybody heard of UMI suspension? I see them on ebay, the guy I bought my car from is using them on his 70.

Great folks. The owner belongs to this site and took some advice from us on what we needed for these cars. Good product at a great price IMHO. Haven't heard a single complaint from anyone on their product or service.

I have UMI's rear lower control arms, they are pretty solid units! Not bad for $100 or so either.

Good Quality, Good Price

What you plan to do with the car is important to consider before you buy any parts, though. What works for drag-racing, is not the same as what works for road-course or even hard street driving.

Derek, I am glad you posted on here, I was told to ask you and another person regarding suspension questions.

My main objective is streetable very very mild track, the car probably wont see the track more then twice a year.

I want something that the family can cruise to car shows in, have a good ride and good handling, but able to handle the track.

What do you suggest I do? Ive seen the UMI product and it looks very very good, and as stated above the price is perfect.

The other guy you were probably looking for was dennis68, who hasn't been online much lately.

Avoid the poly-bushed arms. Those work well for drag racing, but not too good for cornering. The bind causes non-linear roll stiffness, which means as you go into a corner, your car may be well balanced, but as you push it harder into the turn, the rear suddenly gets loose due to too much roll stiffness. (snap oversteer) This happens because the front roll stiffness is linear, and the rear is progressive.

The spherical bearings eliminate all of the bushing bind, but by nature, any 4-link rear will have some mechanical bind. This is pretty minimal compared to bushing bind on a Converging 4-link (C4L), so running sphericals in all 8 places is works well. Ideally, you'd run sphericals on 6 places, and rubber bushings on the axle housing ears to take up the mechanical bind, and minimize bushing bind. The problem with this is, it will allow the axle to move laterally a bit, not much, but enough that a tight-fitting tire may rub. This is where the sphericals for the housing ears from www.wolferacecraft.com (http://www.wolferacecraft.com) come in, or another option is to fab up a panhard bar, which aside from locating your axle laterally, it also can be used to lower your roll center height, which these cars definitely benefit from.

UMI's arms with spherical bearings work very well, but the rod ends will wear out much faster than a typical rubber or poly bushing. They use QA1s teflon lined bushings, which are top-quality in rod-ends, but they will still wear much quicker than a bushing. For the best of both worlds, Currie's arms with Johnny Joints have all the benefits of spherical, but wear like a regular bushing. They are more expensive, though, so UMI is a great option for lower budgets.

The other guy I was told was denny, but the guy you mentioned ill make sure to see his posts as well.

Very good info, thank you.

That gets me on the right track.

The other guy I was told was denny, but the guy you mentioned ill make sure to see his posts as well.

Very good info, thank you.

That gets me on the right track.

Same guy, bud.

Dennis68 = Denny.

If you search for posts by that name a TON of performance handling based threads will pop up. Dereks and Gokou as well. Be prepared, though....they speak "engineer" and some of it makes my brain hurt a bit and makes me wonder why I ever got off my "big wheel" and into a car.

they speak "engineer" and some of it makes my brain hurt a bit and makes me wonder why I ever got off my "big wheel" and into a car.Check out the big wheel forums to see our ongoing discussion on the positive caster of the front fork, and its effects on high-speed stability. ;) :D

Check out the big wheel forums to see our ongoing discussion on the positive caster of the front fork, and its effects on high-speed stability. ;) :D

Will do. Just in time as I was going to swap out the front forks with that of a late model big wheel but put it on hold because I was concerned about bumpsteer. I got a bumpsteer correction kit for it from Hasbro but I dont like band-aids.

Im going independent suspension in the rear on this piece, too.

Ah, I figured as such, but wasnt 100% Beaux, thanks.