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Originally Posted by Beegs
Can you define for us the compromises in the QL system?
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Without mis-quoting, (as that conversation was a couple of years ago) getting too technical or writing a novel, I believe that the concerns were the link lengths, the ratio of link lengths... and having some geometrical intersects that were shorter than what was
considered optimum. But I do know that with the limited amount of wheel travel that our cars have, at the ride heights we run them at, I personally believe that this really becomes a non issue for a track car. But as for a street chassis, unless you have some crazy need for a lot of suspension articulation, it too would have very little effect (street cars dont care about time). It was designed to be packaged the way it is... and there will always be a little give and take into a suspension (the rear) that most people just dont take the time to understand.
The QL is a far depature from running an ordinary leaf spring, that is for sure. In most cases, it will do just fine for a streeter. But if you are looking for that edge over the next guy, or are just anal about having things done correctly or executed as well as it can be done... you definately have better options.
As for cost comparison... what you get out of the LD 3-link for the price is a WHOLE lot more of a complete system than that of a couple of weld on brackets and a pair of dampers. So, in reality... you are getting a lot more for what you pay for. So to compare it to the DSE QL kit... is like comparing apples to Kiwi's.
They are not the same tree by any means.
As for leafs... and I mean real leafs, they are right there. If done correctly the performance will be there... but the cost isnt going too far behind either. I think a complete set of leafs, bushings and shackels can run between $650 to $1200 depending on the spring used. For example, if you want professional spring that is hand made for a specific chassis (which is what I mostly do) or a spring that will do really bitchen on the street and your not up to splitting hairs over lap times (which I have done and doing more of). And then.... you also have the dampers to do. And that is a whole'nother monkey all together, because I can go from a $145 a shock to well over $1200 a piece in the blink of an eye.
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Originally Posted by zcrz
And I would like to know who has a good riding set of leaf springs. Mainly street driven, occasional back road thrash?
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There are other points to consider when asking this question.
First of all, to build the correct rear spring, there is a bunch of information that is required to obtain the wanted ride height and more specifically... the correct spring rate to work with the front suspension system. The rear spring rate is directly related to the front spring rate and any geometrical modifications from OE stock.
So to answer your question... I would need to know your front spring rate, suspension modifiations and all relevent components used, HP and torque production of the engine, engine weight, chassis modifications (fiber glass body parts, battery relocation, etc) and that is about 1/4 of what I would need to know before I even considered a spring recommendation. It would be real easy to just say, "Hey go get these 3 inch drop springs and you'll be good." But, its not that easy... unless your satisified with an (unbeknownst to you) mediocre and unbalanced set up.
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Originally Posted by Bowtieracing
Could you arrange or sell those good "know" leafs? I just want right and reliable package .
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It can always be had... and who knows... it might be a good time, now or in the near future, to do another GP. I can always do one off sets, they just cost more. It really comes down to what you really want, and more importantly, what you really need. Sure I could do pro springs for anyone, but do you really need them.. ??.. or could you get away with something a little less expensive for a street chassis. Yup, I think so...
(DOH !! I still owe Gallopin (David) a drawing as we speak.)
