John - You know I don't like to stray far from OEM on mechanical things unless there has been complete testing done so I would not put them on my car. Steve set me straight on the calipers effectiveness - I think one might be asking for some trouble and safety concerns by using them. Harold McElraft - 3354 --- In dmcnews@xxxxxxxxxxxxxxx, "John Hervey" <john@...> wrote: > > Harold, Don't take this the wrong way, but do you want them on your car. If > so I will do the Hervey thing to them and trade you. No charge. I'm ready to > send them back. I just can't in good conscience send them out. > John :-) > > > > -----Original Message----- > From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of > Harold McElraft > Sent: Thursday, March 29, 2007 7:42 PM > To: dmcnews@xxxxxxxxxxxxxxx > Subject: Re: [DML] Rear Calipers on Ebay > > Actually from the physics thing - I think you will find that force > being applied at the caliper from the brake pedal is unchanged and > the pistons are the distribution medium. Therefore, the force is the > same it is just being distributed over a smaller area. Does that make > a difference in the braking? I don't know because the action on the > pads would have to be evaluated - but, I doubt if much is lost. > > Harold McElraft - 3354 > > > --- In dmcnews@xxxxxxxxxxxxxxx, "Tom Tait" <TTait@> 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. > > > [long quote trimmed by moderator] > 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! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/