In this same vane, we have a 1975 and a 1993, both of which were made for unleaded. When did Chrysler start making our Imperial engines unleaded compatable 1972? I think that the slant 6's in 1971 were unleaded compatable (hardened seats). AND I think that it also had something to do with the compression ratio being lowered slightly in the Chrysler engines versus quite a bit in Fords nad GM's Æyn --- "Steve B." <Imperial59@xxxxxxxxxxxxxxx> wrote: > > I would suggest converting the engine to unleaded. Lead > was a lubricant > > and without it you will fry the >softer leaded specific parts > eventually. > > Having to deal with unleaded additives is a science in itself > and is very > > >costly. An engine rebuild will pay itself off in a short > period of time. > > I burned up a lifter trying to keep up with >it and was > always battling a > > ping even with high octane gas. After my engine was rebuilt > and converted > > to >unleaded, I can run on 87 octane, all day long, and never > have any > > issues. Plus I got about another 10 HP >from just machining > the heads a > > hair off in the process. I have never had to worry about gas > or additives > > >since. Plus 87 octane is cheaper then 94 and the cost of > additives in > > every tank full. Trust me on this one. > > The only leaded specific parts are the valve seats. Changing > them has no > effect on the octane requirement of the engine. If you are > running 87 with > no ping issues then your timing is not set correctly. On my > '59 using 94 > octane and setting the timing so it just barely pings under > heavy throttle > make a tremendous difference in the amount of power. I > sometimes pull the > timing back and run '87 when I am taking a road trip but I > can't stand to > run it that way around town. Just tooooo slow. > > Steve B. > > > > > ----------------- http://www.imperialclub.com > ----------------- > This message was sent to you by the Imperial Mailing List. > Please > reply to mailing-list@xxxxxxxxxxxxxxxx and your response will > be > shared with everyone. Private messages (and attachments) for > the > Administrators should be sent to iml.webmonster@xxxxxxxxx > To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm > > ____________________________________________________________________________________ Pinpoint customers who are looking for what you sell. http://searchmarketing.yahoo.com/ ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to iml.webmonster@xxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm