[VintageLambo] Re: Turbos and Suspensions

Fred, The answer to your suspension question could easily be a dissertation in material science and others have already answered, but here is my contribution nonetheless:Permanent deflection of materials is based on the stress (not force), meaning that it is beneficial to (when possible) change the geometry to distribute the force over a larger area, in this case by welding a washer on the end of the eye of the A-arm. The deformability of a material is defined as the "yield-strength" and its stiffness (inverse softness) by its Young"s-Modulus, which is related to its ability to transmit noise (high frequency vibration). The washer you describe is only loaded (transmit noise) during braking and acceleration so (moly-) bronze is probably a good choice. Here is a reference to web-site where materials can be found based on their properties: http://www.matweb.com/search/searchproperty.asp On the subject of serial or parallel connecting turbos, this is exactly where I have come up with some innovative ideas, which I am sure is patentable, but due to its complexity may not be commercially relevant. In other words I am not going to say too much, until I have decided whether or not to spend the effort (and money) for a patent. Best Regards, Laust --- In VintageLambo@yahoogroups.com, "lamboguy " wrote: > Interesting Laust.Two more points re the Supra (in my OT > discussion, which is now more OT since you are actually putting twin > turbos on your Lambo!) -- the Supra is twin-turbo, using 2 different > size turbos.The small one comes on first and creates a nice > transition to the big one, thereby making it quite drivable, even > with a huge blast "upstairs." > > However, these HP guys typically take the TT setup off and run a > single huge turbo to get the really big numbers. > > Also, since the motor is designed by Toyota to take these loads, I > would think the lower end is beefed up anyway. But your remarks are > interesting, they ring a bell -- I"ll try and find the ref. > > Back to Lambos...There are various "thrust rings" in the rear 400GT > suspension designed to center (actually "locate" since you may want > the arm offset for alighment purposes) the arm or link on its > bushing.They appear to be made out of Delrin.For example: > > http://www.geocities.com/lamboguy/PC21_RearSusp.html > > RN-01028 is the "location ring."I"ve made a few of them on my > lathe -- based on what was on the car -- and they do not seem to hold > up very well. > > Any ideas for other materials?Keeping in mind that there is a > swiveling movement between the arm and frame ears.Delrin is nice > since it is a bearing material, but it doesn"t seem to have the > strength needed for my car.The result is that I set everything up, > drive for a while, check the alignment and find it is off becuase the > delrin ring has deformed (somewhat squished) a bit. > > Long, long story...but that is one of the problems with my rear > suspension.I"ve summarized this at: > > http://www.playerviolin.com/carstuff/RearSuspension/rear_susp.htm > > Which I need to update.I"ve got the suspension back together now > and am trying to dial it in. > > Anyway, any suggestions are appreciated. > > Best, > > Fred