Guest bullitnose Posted February 26, 2006 Share Posted February 26, 2006 I have a 1941 Studebaker champion 169 6cly what plugs should I be using everywhere I go they sell me small engine plugs for a moped r a chain saw. They work however I would like a resistor plug (I have a 6volt pos. radio) Link to comment Share on other sites More sharing options...
mlander Posted September 27, 2006 Share Posted September 27, 2006 DELCO AC STUDEBAKER SPARKPLUG SPECIFICATION CHART Passenger cars--- 1924-1942 only.All 1924-25-26 & 1928 Dictator 77All others thru 1928?????..78SAll 1929-30-31-32??????.761939-40 Champion??????851941 Champion???????.44All others 1933 thru 1941???..86All 1942??????????.44 First 7 of 77, 78s 76 ARE 7/8?-18 threads per inch with a Nominal reach of 5/8? Second 7 of 77 is the heat range of #7 Second 8 of 78S is the heat range of #8Second 6 of 76 is the heat range of #6 The ?S? of the 78S is an extended tip.First 8 of the 85 is the 18mm by ½? REACH nominal reach and a heat range of #5. Denso & NGK do not make a 7/8-18 t.p.i. spark plug according to their catalog. M.L. Anderson Link to comment Share on other sites More sharing options...
Guest Posted September 28, 2006 Share Posted September 28, 2006 AC 86 changes up to a NGK AB-6. I use them in my Pontiac and find them twice as good and twice as long lasting as AC, Champion or Autolite. Link to comment Share on other sites More sharing options...
Dr Morbius Posted September 28, 2006 Share Posted September 28, 2006 Tinindian, I just wondered what ac 44 and ac 45 would change up to in NGK. Do you have the spec's? Thanks! ................Steve Link to comment Share on other sites More sharing options...
Guest Posted September 29, 2006 Share Posted September 29, 2006 I don't have the specs but I am sure that they do. If you go to a dealer that sells NKG they should be able to convert them for you. If not send me a pm and I will see if my local NAPA guy will look it up for you. I used to have to clean my plugs about every six months and replace them once a year (12,000 miles). Now they last twice as long and I believe the car runs better. Link to comment Share on other sites More sharing options...
Guest Posted October 2, 2006 Share Posted October 2, 2006 AC44R change up to NGK 1294 or bosch 7508. Both are available here and in stock. I don't think non resistor plugs are available. I have been using resistor ones in my car for over 25 years and have never had a problem. My preference is for NKG. Link to comment Share on other sites More sharing options...
Dr Morbius Posted October 9, 2006 Share Posted October 9, 2006 I unfortunately can't use resistor plugs because I have a resistor built into my rotor. So with a resistor plug on top of that it would probably decrease the power of my spark at the electrode of the plug. Oh well, it was a nice try. ................Steve Link to comment Share on other sites More sharing options...
Guest Randy Berger Posted October 28, 2006 Share Posted October 28, 2006 I posted the NGK info on this Packard forum. I installed non-resistor plugs in my 56 400. Link to comment Share on other sites More sharing options...
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