Does anyone know the part no. for the flywheel used on a 65 Corvette with a 396? If so please post. Thanks.
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Re: 65 "396" Flywheel
The best flywheel (GM) on the market is the nodular iron wheel sold as a GM Performance Part. It's good for 10,000 RPM and only weighs in the neighborhood of of 15 lbs. I think it's same one as used on L-88 applications. Mr. Goodwrench Parts can order one for you!
Varooom! -
Re: 65 "396" Flywheel
Dale -- If your question is "What was the flywheel originally installed on L78 (396) '65 Corvettes ?", the answer is: the same flywheel that all other '65 small blocks had, ie. the # 3791021. Check the cast # and date on the flywheel, with the inspection cover removed, and you will probably find that it precedes engine assembly by a few days to a few weeks.
A year later, lighter weight flywheels were specified as REPLACEMENT for the L78, and this begats the legend that 396's had unique flywheels.Comment
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Re: 65 "396" Flywheel
Thanks Wayne that's what I needed. Sorry Dale, I'll phase my ? better in the future.Comment
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Re: 65 "396" Flywheel
Dale and Wayne-----
I'm not so sure that the GM PART #3791022 (casting number 3791021) was originally used on L-78s, but I'll check on that later. The information that I have at hand shows the original L-78 flywheel to be GM PART #3866735. It is possible that this is a replacement part, but it is about a 1965-issued part number and 1965 L-78 is the earliest Corvette application for which it was specified. If it was not originally used for 1965 L-78s, then it must have been originally used for some other GM 1965, or so, application. Anyway, I can check and confirm this fact later when I can get at my references.
In any event, the current GM replacement flywheel for the 65 L-78 is GM #14085720. This is a nodular iron flywheel of virtually identical configuration and is the one of which Dale P speaks. If I had a car that required a 12-3/4" flywheel, this is the ONLY one that I would use. Period.In Appreciation of John HinckleyComment
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Re: 65 "396" Flywheel
Dale, Wayne, Joe- The plan is to have this car judged when finished, so "correct" is important. Your help us appreciated.Comment
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Re: 65 "396" Flywheel
Dale --- NCRS doesn't judge flywheels (can't even see them with the inspection cover in place). They do judge bellhousings, [paint coverage] and (I think) they check for the casting # 3858403 (although some "383"s have also been reported). Near the bellhousing casting # are two circles; in one is the month of production (top half) and a dot or dots in the bottom half, indicating the week of the month. NCRS doesn't judge this either, but it's nice to know, especially if you're into checking cast #'s and dates on the flywheel.Comment
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Re: 65 "396" Flywheel
Wayne and Dale-----
I totally agree with Wayne; as far as "correctness" for judging purposes is concerned, the last thing you need to be concerned about is the flywheel. As Wayne says, it's not judged now and I really don't think that it will be in the future. Until, at least, the day when you are required to completely disassemble your car and lay it out on the judging field for "piece-wise" scrutiny and inspection. Then, you'll be in trouble. Anyway, in the meantime, if I had an original flywheel on my 35 year old car, I'd replace it with the GM #14085720. In a heartbeat, I would!In Appreciation of John HinckleyComment
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Follow Up
Wayne, et al-----
I did confirm that the original 1965 L-78 Corvette flywheel was GM PART #3866735. The 63-67 327 12-3/4" flywheel was GM PART #3791022.In Appreciation of John HinckleyComment
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Re: 65 "396" Flywheel
Engines are not customarily disassembled on the judging field (with one noted exception due to owner going ballistic). Most judges are WAY too fat to get under a car to examine a flywheel with inspection cover removed. I've used the performance flywheel on small blocks, raced and street driven for the past 15 years with GREAT success!
Varooom!Comment
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