There are two different weights in the distributor. One has extra metal spot welded to it to make it heavier. Make sure you get the right spring on the lighter weight only. I tried playing with a B27 distributor and drove with it from Minnesota to Houston for the open house this summer. That distributor has equal weights using two springs. An increase in torque was noticable but the car felt slower. The engine didn't move up the RPM range as quickly so I re-installed the stock distributor on my return home. I called all over the Twin City area looking for someone that still has a machine to measure the advance curve but couldn't find one. New cars ignition advance is controlled by the computer and engine shops doing older engines now buy distributors already set up from Mallory and others. I'm guessing the single spring set up is unique to the DeLorean version of the B28. Bruce Benson > I know my mixture is off again by my > own stupid toying with it, and my timing is off when > giving the engine throttle at I believe 3000rpms. We > know why that is, last November while we were > replacing the exhaust manifolds, we took apart the > electrical distributor. There was only one spring in > it so I gave Casey the go ahead to add another one. > The logic of having two springs based on just about > every other distributor known to the mechanic world > seemed just, so one was added. Now, it's going to be > taken away - heh. Live and learn. There's a nice > picture of the insides of the electrical distributor > on John's website. If that picture had only been on > the Net a year ago....oh well =P. > Fun fun fun. > > Jeremiah 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/ <*> 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/