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Tue Oct 30, 2012 1:44 am
Club Member
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Wed Sep 13, 2006 6:57 pm
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dallarax19 wrote:Look up Roll Couple (unless you are familiar with it already) and that should give you an idea of what I am after.
dallarax19 wrote:Yes my conclusion is the Spax/Eibach kit is not sized to meet the designed suspension specs. Normally an adjustable shock allows the opposite problem where the car can be lowered too much and the suspension geometry goes out of whack. This is a first for me where the shock will only raise the car.
dallarax19 wrote:One one final point in the spring calculations it considers the raw steel diameter so you have to subtract the coating from the calc - yes I got some odd numbers at first and after looking at it with a buddy we figured that one out. We estimated the coating to be about 0.3mm, it could be more or less. It is a guess really.
Club Member
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Wed Sep 13, 2006 6:57 pm
Cheshire
dallarax19 wrote:This is a very simple illustration but shows why I want to get it right. I really don't know what ideal is but I believe the factory "static" setting is it. To really understand how big is big I would need to study the actual control arm travel and the hub camber change. I don't really have the time for that now.
dallarax19 wrote:Just another point the dimensions I measured are the spring and also the spring perch and isolator thickness. I need to know the complete stack up. For the spring perches I had turned they have a thinner flange so I reduce some of the total stack up and the control arm moves that bit closer to the ideal position.. I hope that clears up what I was after.
dallarax19 wrote:The stiffer spring is common for lowered cars and for hitting a specific wheel frequency (check out wheel rate if you are not familiar). In this situation the heavier spring limits the amount of suspension travel, the shock manages the how quickly the suspension responds. The trade off is a harsher ride. For a given load the spring will compress only so much. That is important because the change in camber and toe is minimal because the jounce/rebound range is small - softer spring will have a larger jounce and rebound range.
dallarax19 wrote:The thing for me is I don't know this car that well and it is best to get the input from other owners. They have been around for along time and I don't want to make too many assumptions ans reinvent the wheel.
Non Member
99
Tue Oct 30, 2012 1:44 am
Club Member
858
Wed Sep 13, 2006 6:57 pm
Cheshire
Non Member
99
Tue Oct 30, 2012 1:44 am
Club Member
858
Wed Sep 13, 2006 6:57 pm
Cheshire
dallarax19 wrote:Yeah the quest was a bit up and down and all over the map but I am content with the outcome. My initial problem of trying to solve the toe was due to what I would call a part defect with a long threaded ball joint. 99.99% Of the people would have just trimmed off the end from the gitgo and been done with it but I am one of those guys that has to investigate it and understand all the details to assure there isn't another underlying problem. No matter what I would have gone through the exercise down the road when I wanted to lower the car so it has not been a wasted effort.
dallarax19 wrote:I would like to give a hearty thanks to you for your assistance. You have quite a bit of technical stuff I don't have so the information you have provided has been added to my Alpine technical library. The static setting jig / gauge was a key piece of information.
dallarax19 wrote:So after all the commotion and stir the car drives nothing like I expected. I thought it would be more race car like, tight and skittish. My car anyway, is fairly soft and tame. I have yet to really try to throw it around but I was starting to push it around turns and it was pretty docile. I suppose that is a good contrast to my Fiat.
dallarax19 wrote:Over the winter I will be addressing the remaining technical issues and will post them on the site. Some issues will seem goofy and trivial but I will dig deep so I can make an informed decision. Once mechanically sorted I can move to paint and finish.
Non Member
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Tue Oct 30, 2012 1:44 am
Club Member
858
Wed Sep 13, 2006 6:57 pm
Cheshire
dallarax19 wrote:Hey John, I don see where I can put that icon cept here ; Where am I supposed to tag it so it will register as a thanks?
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