As of right now I have the Saab M/C on my car. I hit the brakes hard and the ass end wants to swing around. I cant see that 5mm will make that much of a difference in the piston size if you are running the correct M/C. Seems like they engineered it funny that way like some other parts on the car like the fuel sending unit where when it goes your kinda screwed. Mark V On Mar 29, 2007, at 7:04 PM, Tom Tait wrote: > (note - I'm not an automotive engineer, but this is pretty basic > physics > and common sense) > > > > If one uses the same brake pads, then the stopping power will be a > factor of how hard those pads are pressed onto the rotor. > > > > You could compensate for a smaller piston by pressing harder (5% I'm > guessing without doing the math) and get similar braking results with > the following caveats: > > > > If you can't push hard enough to nearly lock up your brakes, then you > are not reaching your full braking power - its' unlikely that 5% would > make a difference for most drivers, but it could. Once you push hard > enough to lock up the brakes, its all equal anyway. > > > > The smaller rear calipers will shift more of your braking power to the > front of the car, but not as much as the saab master would shift it. > > > > A smaller caliper pushing into the back of the pad may distribute the > force onto that pad differently than the larger one would, causing > slightly decreased performance or pad life, particularly as the pad > wears thin. > > > > How you feel about this stuff depends on how you drive your car, and > what you expect from your brakes that one time every 5 years that this > might make a big difference. > > > > My understanding is that the castings are nearly identical, and coming > from the same factory. Based on the production dates it seems that > the > Jag brakes pre-date the Delorean brakes. What is it about that 5mm > difference that made the original engineer at Delorean, who had to > make > the call, decide to go with a new casting and part, rather than an > existing one? Maybe it was so the parts department at the Delorean > Dealers could charge more for their part, or maybe it really makes a > difference. > > > > They are your brakes, it's your wallet and your butt in the seat. I'm > not sure myself if the difference is really that important to the > casual > driver, but I think John is doing service to more than his own > business > by pointing out that there are differences and letting us all > decide if > or how they affect us/ > > > > Like most things here - you have to make that final determination > yourself. > > > > > > From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On > Behalf > Of DMCVIN6683 > Sent: Wednesday, March 28, 2007 7:02 PM > To: dmcnews@xxxxxxxxxxxxxxx > Subject: Re: [DML] Rear Calipers on Ebay > > > > Why wouldn't these work correctly? > > Some of us have been using the wrong Master Cylinder for years with > no problems that has been proportioned all wrong so who is it to say > these Calipers wont do the job being 5mm smaller? > > Mark V > > On Mar 28, 2007, at 6:38 PM, John Hervey wrote: > >> Group, >> If you were bidding on or purchased rear calipers on ebay in the last >> month I have some sad new. They are not DeLorean they are Jaguar. >> Don't buy them and don't use them and don't put them on your car >> unless you can confirm they are DeLorean. >> I don't think the seller did it on purpose but I did send an email >> and never got a reply. >> I bought a set and got them in today and confirmed they are Jaguar. >> The difference is the rear Delorean caliper pistons are 48mm in >> diameter and the Jaguar are 43mm in diameter. That doesn't sound like >> much, but it could make a big difference in a jam not having that >> extra >> 5mm size and volume for stopping. >> Bidder #3 also bought some. >> So be careful and ask before you buy any rear caliper. >> For those of you that have ordered from Autozone or other Box stores, >> you to may have got the wrong part also. I have heard some people >> boasting on other chat groups that they bought DeLorean calipers and >> how much money they saved. I don't think you got DeLorean. You either >> got Mercury Capri on the front and Jaguar on the back. >> John Hervey >> www.deloreanautoparts.com >> www.specialtauto.com > > > To address comments privately to the moderating team, please address: > moderators@xxxxxxxxxxx > > For more info on the list, tech articles, cars for sale see > www.dmcnews.com > > To search the archives or view files, log in at http:// > groups.yahoo.com/group/dmcnews > Yahoo! Groups Links > > > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! 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