Vipercar93

Normal members lose edit ability after 10 minutes. Hmm Kinematics would be I have toe out built into the suspension geometry? Then the dynamic side of it would be because of bushing deformation?

I had to google kinametic toe. Guess I just balled it together with a 'dynamic toe' term. To get rid of the complaince and resulting kinametic toe could a nylon or metal bush be used? How much would it increase NVH? You will have to pardon my ignorance in many terms. Trying to learn =)

Thanks! It doesn't look as nice in person. I doubt you will see many. They only sold 1200 ACR's and only 25k SRT's, almost all in the USA. Yeah I hate the modding bug.. one thing leads to another. Engineers knew what they were doing when they make cars and almost every part is designed with the original specifications in mind. With a family it doesn't work! Not really touched it now for a few years now. Only ended up with the BC's because they were cheaper than re-fitting OEM in the rear only. Maybe next year will have some free pennies. I have always intended to hit the racetrack. I have been really lucky with mine, they haven't made a noise! The noise is one of the downsides to poly's. If I wasn't daily driving mine every day I would putter around and fit zerks in to grease them properly, but I don't really have the time to tear it apart and refit easily in the weekend, especially considering the weather!

Well that would be interesting to see if you could measure together Shows where I have to be more specific. Good to know.

LOL That a photochop?

Bit confused. American can't keep up, so you guys can physically measure lock/center/lock while simulating a droop/bump? I thought this could be calculated out?

Tony got me thinking in another thread. What would I need to work out dynamic loading and geometry changes when in different conditions. What all do I need to work this out mathematically. I realize that with bushing deflection the numbers would be a bit skewed, but still. The list Springrate Shock rate (Slow/fast bound/rebound?) (Range? They are adjustable) Sway bar rate pre-load ride height corner weights caster camber toe Guessing at... Control arm length Distance between strut top mount to chassis mount for control arm w/ degree of offset from vertical to each other? Distance from strut top mount to the contol arm Wheel size/ offset Unsprung weight I am curious, I have been to the track a little, and have always wanted to get into racing. I don't have the pennies to do it now, but maybe one day! In the meantime though gotta feed the brain in other ways.

Polys should be greased regularly, or they chew themselves apart. There are bushes that can be purchased with graphite impregnated into them to cut down on wear, not sure if it's a marketing gimmick though. If you use the proper marine water resistant grease you can go a long time on poly's. The bushing itself will have a life about double that of a normal neoprene. Ride comfort is very subjective. It's always a trade-off of either performance or drivability/comfort, it depends on how much comfort the person is willing to sacrifice for 'performance'. Even if the 'performance' isn't needed. Be interesting to see what the dynamic toe/camber/caster would come to when loading everything up. I have always been curious! I read up on some of the basic stuff, but have never dealt with suspension dynamics, always interested in learning! Specifically for the SRT-4 they were plagued by toe-out when launching off the line at the strip which caused the contact patch to scrub and the tire would slip. When it slipped the toe went closer to 0 after the bushes came back to form and the tires bit again. This cycled a few times and the front end would start hopping and axles were snapping if the driver tried to drive through it. The other issue which I had was the control arm actually slipped down on the vertical bushing and was resting on the K-member. The design of the poly bush prevents this and kept the toe at a more reasonable level. Part of the toe out I think was part of the suspension extension, the rest came from deformation of the sloppy oem bushes under the torque loading. Since I moved to the poly's wheelhop has gone away, but I have not been to the strip in a few years.

I have had a set of BC coilovers on my car now for a while. I really enjoy the ride. It's soft enough to my liking but when you lean on them they let you know they are up for it!

Looks nice and clean shame you are selling it.

To be honest they were a pain. They were vulcanized to both the control arm and the metal sleeve. We pressed them out with a press and then cleaned them up with a torch/knife/wire brush. The newer bushing kits sold for the front control arms comes with the metal sleeve already supplied so it saves a bit of time but it was still time consuming. The new bushes were 'easy' to install, still needed to press in one of them on the control arm though.

They are going for the old skool low profile look!

Wish I would have known this =( Been wanting to get my car corner weighed to get the ride height adjust properly. DOH nevermind, next time! How much you looking at for this service?

I bought the car new in 05. I never really intended to get into 'modding', but one idea turned into another. Then the hours on the net searching and reading about what others do to their cars, and more importantly WHY got me hooked. I am a corner junkie so spent hours and hours pouring over suspension dynamic stuff and ended up with the funsies I have now! It's never done, but finances are short so the 'project' has been put on hold until I have some pennies to play with. I started off with putting on a full 3" turbo back exhaust. This netted me some 70WHP in the lower RPM's with a peak gain of 20 or so. It pumped up the ft-lbs a good 50 and decreased my spool rpm (full boost rocks on at about 2k RPM). I kept with a magnaflow silencer and high flow cat. Otherwise I could have added another 10hp or so. I have not dynoed the car, these numbers are just off what other people end up dynoing on the same setup. So I could be a little bit off. With the exhaust I added in a willwood big brake kit to combat brake fade. The stock system is competent (60-0 in 110ft) but would quickly become saturated with heat during 'spirited' runs and trackdays. I was limited by the ACR BBS's so I couldn't fit in a larger kit. I wanted to go with a 13" kit with 1.25" rotors instead of the stock .81's but they were too big. Still the 12" kit offered better braking in the higher speeds. I also put in the poly bushes at this time. For anyone that enjoys cornering these pretty much have to be the first on the 'to do' list. They took alot of the 'mushyness' and play out of the car that you would find when cornering hard and gave much better feedback into the wheel. Because the suspension wasn't deforming as much it helped a lot with my bump steer that I would normally get. The last toy I added at this time was a diablosport predator engine tuner. This allowed me to scrub the error codes and adjust certain engine fueling/spark/boost parameters to lean the car out when in open loop to get a few more ponies out of the engine. This supposedly netted me 30HP and another 50ft-lbs. I drove the car like that basically until I blew out one of the rear struts. They are a one off kit that Tokico made for Dodge specifically for the SRT-4.... it ended up being cheaper to put a set of coilovers on all 4 corners than it was to get OEM. I ended up getting a set of BC's (which WIM Sell!) and I love them. They are a quality aftermarket suspension part that is sold for a reasonable price! I also added in a set of hotckiss swaybars to get ride of almost all of my body roll. There are other toys I added in like a WOTbox/2 step launch control, ACT 6-puck clutch (way more clutch than I need, but sooo much fun!), solid engine and transmission mounts, walbro fuel pump (when I was thinking of going big turbo), various gauges, fuel rail, jeez the list goes on. I snapped my input shaft 2 years ago, that was fun to fix. Replaced my 3rd gear syncro too. I use this car every day, and it gets DRIVEN and love every minute of it. Some may say abused considering I snapped the input shaft, due to an aggressive clutch and a heavy foot. I keep up on the maintenance and make sure I follow warm-up and cool downs. This is where most of the engine wear is going to happen. So far so good! There are more things I want to do to the car. It's all prepped for a big turbo kit, but I want to keep the drivability up and the maintenance down so will have to see. There are few more things I want to with the suspension like adjustable rear control arms and maybe ditch the poly bushes for a machined greasable bush but money is tight. A few of my buddies and I had planned to hit the 'ring' next month but the bill for the trip was north of the £1k mark so I had to pull out. Here are a few links! https://www.fuelly.com/driver/vipercar93/srt4?fu=2996203 http://www.flickr.com/photos/15859810@N05/