L48? L82?
Acct suspended by request 19 April 2011
Joined: Jul 2009
Posts: 478
Likes: 0
From: La Porte In
GM used some sprockets with nylon covering on big block 350's. Never seen that on the small block. 76 would be the same motors I believe. Search for Corvette history you will know. Replacement sprockets are all metal from the parts houses.
Le Mans Master
Joined: Oct 2007
Posts: 7,446
Likes: 972
From: Tennessee/Rhode Island
Just as a point of reference, the 69-71 LT-1's made 330-370 GROSS HP, not NET, and the 1972 LT-1, made 255 NET HP, when GM revised how they advertised horsepower claims, with the difference between the 71 LT-1 HP claim of 350 HP and the 1972 LT-1 of 255 HP being the way the horsepower was measured. Most people generally feel that the the LT-1 was a pretty good motor and made decent horsepower, especially for that time. With relatively minor external modifications, a 1977-1980 L-82 will make around 300 NET HP which really is pretty good and 350 HP is possible with a cam change. High 350 HP and beyond requires more extensive changes like new heads. My point is unless someone is looking for more serious horsepower, the stock motors can be retained with some modifications, as another option.
Le Mans Master
Joined: Oct 2006
Posts: 6,388
Likes: 2
From: Eagle River Alaska
Maybe you mean't 400 BBs?
Melting Slicks
Joined: Apr 1999
Posts: 2,010
Likes: 3
From: Moon Twp. PA USA
We may be getting confused. I was refering to nylon teeth on a metal sprocket. I have never seen a nylon covered timing sprocket on a SBC . What was the purpose?
Yes, I know that most/all aftermarket timing sprockets are all metal.
I will not search for Corvette History, as you suggested. You are presenting your statements as fact, so I feel it is up to you to provide documentation for your facts - not just say "go search".
While you are at it, can you provide documentation for this statement of yours "Not so. I have a 78 L82 with dual sprocket also racing cam stock. The C3'S were metal sprocket even the single. " Dual sprocket and a racing cam were stock???
Instructor
Joined: Apr 2007
Posts: 184
Likes: 1
From: Atlas is shrugging KC, MO area
My 73 L-82 had a nylon covered cam gear as did my '68 GTO. The reason for this that I was told was they run quieter. Especially when they jump a couple of teeth and the engine won't start. 
