Pulled my distributor out over the weekend and it is # 1112066. Looked on George's site and according to the data there I should have a 1112037. Anyone know what mine would have been out of or if there are any mechanical differences to the one I should have? Thanks!!
1112066 or is it 1112006? I see no listing for your posted number. The 1112006 was used on the '70 350-4V hi comp. engines & the '71 350 with manual shift.
71 Chassis Service manual has: 1112006 for manual trans, 1112037 for 2 bbl and 1112080 for 4 bbl. I haven't found anything in my 71 assembly manual as of yet. I'd like to buy a 1112080, but haven't come across any yet, no big deal. It is one of the few original pieces I'm missing.:Smarty:
David, Is that good/bad or indifferent? Would you know if it should perform the same as the correct stock unit?? Thanks!
David, what's a dual diaphragm? I know Ford used a dual diaphragm vacuum advance/retard, but never saw one on a GM.
Larry asked: David, what's a dual diaphragm? I know Ford used a dual diaphragm vacuum advance/retard, but never saw one on a GM. Well Larry its like this, with over 3 decades selling Buick parts I can honestly say I never sold one or ever saw one. I'm a numbers and research guy with part numbers going back to '38. So lets try again...... Buick parts 5/72 says, "1971 "B" bodies 350 with dual diaphragm. Buick parts 4/76 says, "1971 "B" bodies with 350 eng. Buick build and service manuals do not make reference of this distributor. Could be a parts replacement.......but it does fit a 71 350 only. David
Is the dual diaphragm for High Altitude vehicles My old Motor manuals do not show a distributor no. 1112066o No:
You can run more timing at high altitude with less atmospheric pressure.. On my 88 jeep they have a high altitude crank position sensor that provides abot 4 more degrees of timing..
David, Do you have access to the Hollander interchange data? They usually show all part nos. and notes about where the part would be used or what it replaces,etc.
The chassis manuals have the specifications for the stock distributors. My guess is that the 1112066 will not be listed in the 1971 manual. Maybe someone with a 71 Chassis manual can confirm that. In any case, you can figure out how much mechanical advance is in the distributor by first setting the total advance with very light springs. Once you have done that, put heavy springs in, and check where the initial advance has ended up. Then just subtract. For example, if you set the total advance to 32*, then check the initial advance with heavy springs, and it is at 10*, 32-10=22, that means there is 22* of mechanical advance built into that distributor. All this must be done with the vacuum advance disconnected and plugged. It is a lot easier to do this with a dial back advance light.
Don't see the 1112066 in the manual, but you can compare the others listed for '71 on page 68-32: http://www.teambuick.com/reference/library/71_chassis/files/68-b.pdf Devon
