Vette(s): 1977 T-Top Coupe, Black with
Buckskin Interior. Restored.
From the VIN # of my '77 I have learned that my car has a std. 350/180HP motor. When I bought the car the spark plugs that were in it were R44TX AC plugs but the Haynes manual says that it should have R45TS plugs. I know these plugs have a longer reach than the R44's
so I am afraid to replace them as I don't want to hit the tops of the pistons. Which one
is correct? Also, can anyone tell me what the correct octane gas should I be using? The previous owner said that he used 87 but that just doesn't seem like the best choice.
Vette(s): 1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear,
Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.
There's no need to use anything but Regular gas in your car. As far as the plugs go, I would check with several local parts stores and see what they say, if they all say to use the same one, then that's what you need to put in there.
Vette(s): 1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.
Good Morning All, I suggest using AC45TS (they are not to long unless you have domed piston which you do not) and set gaps at .042 instead of .045 as recommended by the books.These are used for continued street use (start and stops in city).. For performance engines that run the track or is used on long road trips at high rpm we use depending the use i.e. strip use AC42 TS series,next hotter plug is AC 43 TS,for combination some street. For freeway(California folks) use AC44 TS.Daily driver with an occasional highway drives use AC45TS and all with the gap of .042. I have evaluated all these on various engines and race cars over the last 30 years with much success. As far as octane of fuel,unless your engine is timed at 4-6 degrees advanced you would want to use at least 89 octane,however I did a study on my '72 Chevy 1/2 ton pick up with a 360 hp 350 engine and found that while burning premium fuel I burned less fuel (15 MPG as opposed to 12 with 89 Oct.) I would not consider burning 89 in my (370hp 350) Vette and in fact I have located a couple of service station that have NON ethanol fuel..That's just me and all the people here that I have built performance engine. Have a great day and happy motoring...Sal C
Corvette is a registered trademark of the General Motors Corporation(GM) &
Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise
noted) and does not claim or imply that Chevrolet or
GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated
with, sponsored or supported by GM. Copyright/trademark/sales mark
infringements are not intended, or implied and are in fact used to support
GM, Chevrolet and Corvette.
Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS
Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982