LT1 cam specs
Le Mans Master
Joined: Apr 2005
Posts: 6,339
Likes: 416
From: Seattle Area WA
The GM 3896962 cam is a great choice, however one thing I might suggest is advancing it four degrees. The duration at .050" lifter rise is 224/224 compared to 221/221 for the L-79 cam. The '962 cam points of maximum lift are 114/114 versus 110/118 for L-79, so it's effectively retarded. Low end torque can be enhanced with a slight loss of top end power by advancing it 4 degrees to achieve the same indexing as L-79.
Sealed Power, Federal Mogul, Melling, Crane all offer the GM 3896962 (L82 cam). The Summit kit 1104K isn't close, the peak lift centerlines aren't the same.
Sealed Power, Federal Mogul, Melling, Crane all offer the GM 3896962 (L82 cam). The Summit kit 1104K isn't close, the peak lift centerlines aren't the same.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Actually the LT-1 370HP rating was done with the 1969 motor that had a 30-30 grind camshaft in it andf not the dual pattern "LT-1" camshaft that was actually installed in the 1970-72 LT-1 Vette. I don't like either camshaft for the LT-1 motor in a modern rebuild. Stay around 240 degrees duration @0.050 lift and around 0.525 lift and you will have a great running LT-1 motor. I would go a solid roller cam if you have the money for one with the problems we are seeing with todays oil mixtures.
Melting Slicks
Joined: Jan 2004
Posts: 3,245
Likes: 210
From: Detroit MI
Actually the LT-1 370HP rating was done with the 1969 motor that had a 30-30 grind camshaft in it andf not the dual pattern "LT-1" camshaft that was actually installed in the 1970-72 LT-1 Vette. I don't like either camshaft for the LT-1 motor in a modern rebuild. Stay around 240 degrees duration @0.050 lift and around 0.525 lift and you will have a great running LT-1 motor. I would go a solid roller cam if you have the money for one with the problems we are seeing with todays oil mixtures.
Le Mans Master
Joined: Apr 2005
Posts: 6,339
Likes: 416
From: Seattle Area WA
GM 3849346 solid cam is known as the 30/30 cam not to be confused with the Duntov cam because very often you hear someone say I have a Duntov 30-30 cam which is actually much different. The 30-30 was used in 327-365HP Corvettes and Z-28 302 Camaros. It has specs of 254/254 .485"/.485" on a 114 LSA.
Instructor
Joined: Apr 2010
Posts: 185
Likes: 8
From: Gilbert Arizona
Camshaft
Ok guys and hopefully some gals. I have a 69 350/350 vette, with 11:1, compression. bored 30over, edlebroke manifold and Holley Ultra cfm 770 all alumiumn carb. I did have a crane cam part number 113801, econopower. Min rpm 2200, max rpm 5700. Piece of crap. Also have headers, side exhaust. I am looking at the thumper series from comp. love that sound. Any suggestions. Would like street/strip. Thanks 
