A suspension tale...
Posted: August 12th, 2009, 12:47 am
OK...so here's what's happened in the past couple of weeks.
I got the prototype bushings installed on the car about 2 weeks ago and then promptly went on vacation where I was dragged behind a boat by people pretending to be my friends while secretly laughing at my pathetic inability to either Air Chair or water ski. I drove the car a couple of times before leaving and I've put a couple hundred kms on it since I returned. It felt...different. No more clunking, which I thought was encouraging, but it was pretty loose feeling. I attributed this to the fact that I had not reinstalled the rear Anti-Sway bar (I sold my last set of end links) and the alignment was screwed...to say the least.
The last couple of days have been particularly good though.
Yesterday I dropped the car off at the alignment shop and they said they'd look at if that morning. "Good" I said..."thanks!" They called me yesterday morning at about 10am and told me that they could not align my suspension as the "Pretty Purple Bushings" are so loose there's no point.
I says.."Pardon???"
"Come see for yourself!", says he.
"Oh, I will!!!", says I.
So I go over there and he jacks up the rear of the car and proceeds to wiggle the rear driver's side wheel around like...well...something really wiggly...which we can all agree is really bad. I can see when he manhandles the wheel that the rear lateral link bushings are clearly not doing their job.
"Hmmm", I says.
"There all like that", he says.
So I take the car back. He didn't charge me for the 1/2 hour or so they spent on it which was nice of him. But I'm basically freaking out.
I don't think I need to explain to you all how my butt is well and truly on the line with these bushings. If they don't work I'm likely going to have to change my name and probably my country...no Continent...of residence as well.
I also found out i have an inner ear infection. Result of the previously mentioned Tug O' War with the boat and a gallon or so of lake water in my ear.
The ear thing turns out to be helpful because I was legitimately (sort of) able to call in sick today. I figured I knew what the problem was with the bushings, but I needed to get in there and basically take it all apart again to get it working. So I get the driver's side of the car in the air and the rear is definitely loose. I go to the front and I find that these bushings seem quite tight. I wiggle the wheel and it does move, but its not the bushings that are moving it's the tie rod end. It appears I have been given the wrong tie rod ends and the post is loose in the steering knuckle. That's a relief. I pry on the LCA with various tools to make good and sure that things are as they ought to be and they are. I also take a few minutes to adjust the toe in. It's pretty close now, but the caster and camber are still quite bad. I also tighten the crap out of the tie rod ends.
So the front end is ok. Now to deal with the rear end...which does have a minor problem. See the design requires that the bushings be pre-loaded a certain amount to sort of "squish" the bushings into the pocket of the suspension part it lives in. To accomplish this, the inner sleeve has to be shorter than the assembled bushing. Imagine the rear subframe...you have a bolt passing through the front Lateral Link, the subframe, the rear lateral link, the tie bar and then a nut. As you tighten the nut, all the parts get sucked together until the sleeves of the bushings hit the subframe. If the sleeves are too long, the bushings won't get squished enough before the bolt is tight and that's exactly what happened. I took everything apart, ground off a bit of each sleeve, regreased everything, put it all back together mother tight and installed the rear Anti-Sway bar.
Can i just say...NEW CAR!!!
I actually don't think I could be happier. The 70A bushings are compliant, but precise. The car feels so much smoother and much much tighter. They are quite soft. It's a daily driver for sure...definitely not racy. But that's exactly what I wanted with the 70's. I think the 80's and 90's will be really nice for those that want a razor sharp ride.
I had a right good freak out yesterday, but after doing some fine tuning I'm ecstatic. I can't wait to get them in your hands.
And that is why we test new parts.
I got the prototype bushings installed on the car about 2 weeks ago and then promptly went on vacation where I was dragged behind a boat by people pretending to be my friends while secretly laughing at my pathetic inability to either Air Chair or water ski. I drove the car a couple of times before leaving and I've put a couple hundred kms on it since I returned. It felt...different. No more clunking, which I thought was encouraging, but it was pretty loose feeling. I attributed this to the fact that I had not reinstalled the rear Anti-Sway bar (I sold my last set of end links) and the alignment was screwed...to say the least.
The last couple of days have been particularly good though.
Yesterday I dropped the car off at the alignment shop and they said they'd look at if that morning. "Good" I said..."thanks!" They called me yesterday morning at about 10am and told me that they could not align my suspension as the "Pretty Purple Bushings" are so loose there's no point.
I says.."Pardon???"
"Come see for yourself!", says he.
"Oh, I will!!!", says I.
So I go over there and he jacks up the rear of the car and proceeds to wiggle the rear driver's side wheel around like...well...something really wiggly...which we can all agree is really bad. I can see when he manhandles the wheel that the rear lateral link bushings are clearly not doing their job.
"Hmmm", I says.
"There all like that", he says.
So I take the car back. He didn't charge me for the 1/2 hour or so they spent on it which was nice of him. But I'm basically freaking out.
I don't think I need to explain to you all how my butt is well and truly on the line with these bushings. If they don't work I'm likely going to have to change my name and probably my country...no Continent...of residence as well.
I also found out i have an inner ear infection. Result of the previously mentioned Tug O' War with the boat and a gallon or so of lake water in my ear.
The ear thing turns out to be helpful because I was legitimately (sort of) able to call in sick today. I figured I knew what the problem was with the bushings, but I needed to get in there and basically take it all apart again to get it working. So I get the driver's side of the car in the air and the rear is definitely loose. I go to the front and I find that these bushings seem quite tight. I wiggle the wheel and it does move, but its not the bushings that are moving it's the tie rod end. It appears I have been given the wrong tie rod ends and the post is loose in the steering knuckle. That's a relief. I pry on the LCA with various tools to make good and sure that things are as they ought to be and they are. I also take a few minutes to adjust the toe in. It's pretty close now, but the caster and camber are still quite bad. I also tighten the crap out of the tie rod ends.
So the front end is ok. Now to deal with the rear end...which does have a minor problem. See the design requires that the bushings be pre-loaded a certain amount to sort of "squish" the bushings into the pocket of the suspension part it lives in. To accomplish this, the inner sleeve has to be shorter than the assembled bushing. Imagine the rear subframe...you have a bolt passing through the front Lateral Link, the subframe, the rear lateral link, the tie bar and then a nut. As you tighten the nut, all the parts get sucked together until the sleeves of the bushings hit the subframe. If the sleeves are too long, the bushings won't get squished enough before the bolt is tight and that's exactly what happened. I took everything apart, ground off a bit of each sleeve, regreased everything, put it all back together mother tight and installed the rear Anti-Sway bar.
Can i just say...NEW CAR!!!
I actually don't think I could be happier. The 70A bushings are compliant, but precise. The car feels so much smoother and much much tighter. They are quite soft. It's a daily driver for sure...definitely not racy. But that's exactly what I wanted with the 70's. I think the 80's and 90's will be really nice for those that want a razor sharp ride.
I had a right good freak out yesterday, but after doing some fine tuning I'm ecstatic. I can't wait to get them in your hands.
And that is why we test new parts.