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OP
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Can someone tell me..is a W89D the same as a 3077....Thanks
Happiness is the trip, not the destination.
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Backyard Mechanic
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Backyard Mechanic
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Both the Champion W89D and the Autolite 3077 are "hot" plugs. According to my chart the Champion is a slightly hotter plug but not much.
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I have used both the Champion W89D and Autolite 3077 plugs. Seem to be about the same in my '28 Chevys.
How Sweet the roar of a Chevy four!
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Shade Tree Mechanic
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Thank's to both of you. I have a 1928 1 ton and it has AC 76S plugs and, being me, I would like a spare set. I've search all over for the 76S to no avail, but I found W89D's and they have the reach for the 171 chevy. I suspect that they are just a little hotter than the 76S so we'll have to adjust for that, but that shouldn't be a problem....Once again thanks..Terry
Happiness is the trip, not the destination.
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Technical Advisor ChatMaster - 10,000
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AC78S is also a very good plug for the 1928.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Shade Tree Mechanic
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OP
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Thanks ...I'll see if I can find them.
Happiness is the trip, not the destination.
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Backyard Mechanic
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Backyard Mechanic
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The AC76S is a medium range plug with the AC78S slightly hotter. They are about level with the Autolite 3076, all being mid range plugs. The Champion equivalent is about W14 and W16. Both the Champion W89D and Autolite 3077 are much hotter. Try and report.
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Joined: Jul 2014
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Shade Tree Mechanic
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Howdy Terry.....The AC76S plugs that are in the 171 are working pretty good but, I think trying the W89D would be fun to do. They're about $15.00 each but, it's only a four cyl so it's not a deal breaker and I have nothing better to do anyway.
Happiness is the trip, not the destination.
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Hi Guys,
I run 3077's in my 28 and have done so for the last few years. As they are a hotter plug, to safeguard the inners, and to lower the temp of the combustion I run a litre of diesel per tank of gas. It does not smoke or smell, and is a great upper cylinder lubricant. The 3077's made a different in power on the hills over the W14's and a noticeable difference between advance and retard, but they demand perfect timing.
Cheers
Ray
Some say "Street is neat". I prefer "1928 is great" I have documented my 45 years with a 1928 Chev Tourer, from 1973 to 2018, and regulary add other items that I hope are of interest to others. Your comments are most welcome.The story of the Red Chev can be viewed at http://my28chev.blogspot.com/
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Shade Tree Mechanic
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Howdy Ray...The plugs will likely take a week or two to get here. I think I'll need to advance the timing a couple of degrees. The diesel sounds like a good idea, here it's mostly kerosene, and it might slow the combustion a bit which I don't think would hurt much and as long as it's not going to mess up the vacuum tank, a litre in 10 gallons isn't going to hurt anything. We have some hills here and I'm curious to see if there's a difference...
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Hi Terry,
Kerosene should do the same job, combustion temperature wise as diesel, but being a bit thinner you may not get the same upper cylinder lubricant properties. On the 2 Chev 4's I have converted to 3077's, what was a good fully advanced setting for the shorter plug gave a miss under load, mainly up hills. All it took on both 28's was backing off the fully advanced by a pencil line thickness, between 1/16 to 1/8 inch. After that they ran fine. Beware though, don't think the miss is a fuel problem, which it seems like. I run my 77's at 30 thou.
Good luck, let us know how you get on.
Cheers
Ray
Good luck
Ray
Some say "Street is neat". I prefer "1928 is great" I have documented my 45 years with a 1928 Chev Tourer, from 1973 to 2018, and regulary add other items that I hope are of interest to others. Your comments are most welcome.The story of the Red Chev can be viewed at http://my28chev.blogspot.com/
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Terry
I use 3077's also
Ken
I have a 1927 Chevy Capital AA 4 Door also a 1927 Chevy Touring car, a 1936 Chevy 1/2 ton and a 2010 Corvette LT3 Convertible and a 1953 Packard Caribbean. My tow car is a 2011 Suburban.
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Shade Tree Mechanic
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Howdy...The plugs came in yesterday so I went in and got them today. I regaped them to .030 , then threaded them in and retarded the timing a bit and took it for a ride. It started fine and run alright but I didn't notice any difference on the hill in front of our yard. Since I got the 28 I've not adjusted the timing( except the retarding I just did) so I loosen off and did it by ear. I have hill that I can't get up except in second gear, a good test, I went up that hill in 3rd gear without a" by your leave", those W89D's are good plugs. Now, some day I'll take for a ride and see if it is going to heat up on me, Thanks
Terry
Last edited by Terry28; 08/24/14 12:36 AM.
Happiness is the trip, not the destination.
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Hi Terry,
The majority of people who convert to 3077's of W89D's are usually more than happy with the result.
Cheers
Ray
Some say "Street is neat". I prefer "1928 is great" I have documented my 45 years with a 1928 Chev Tourer, from 1973 to 2018, and regulary add other items that I hope are of interest to others. Your comments are most welcome.The story of the Red Chev can be viewed at http://my28chev.blogspot.com/
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Joined: Sep 2008
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ChatMaster - 1,000
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I have a 1927 Chevy Capital AA 4 Door also a 1927 Chevy Touring car, a 1936 Chevy 1/2 ton and a 2010 Corvette LT3 Convertible and a 1953 Packard Caribbean. My tow car is a 2011 Suburban.
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Joined: Jul 2014
Posts: 50
Shade Tree Mechanic
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OP
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Thanks...Playing with that old chevy is fun to do....Since then I've developed a fuel leak on the carb, I'm sure that it's because of the new plugs-it's pouting..lol...Terry
Happiness is the trip, not the destination.
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