Stock intake?
Thread Starter
Racer
Joined: Jan 2008
Posts: 386
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From: macks creek mo
Stock intake?
Hello I am new to the corvette world, my 69 vette has this intake on it is this a 350hp intake,on back of intake it says GM 3972116. What does the W mean? Also it has a holley on it 4150 double pumper list 4780-2 below that 3477,I know that it is 800cf but can you guys tell me more about it? THANKS JON
Tech Contributor
Joined: Aug 1999
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From: At my Bar drinking and wrenching in Lafayette Colorado
The "W" on your manifold shows it is a GM manifold cast at the Winters foundry. It's a good manifold.
The 4780-2 is a Holley 4150 800 cfm mechanical secondary carb. It should be jetted 70 primary, 85 secondary with a 6.5 power valve and .031 shooters. It's probably a bit big for a mild 350, but can be tuned to run well.
The 4780-2 is a Holley 4150 800 cfm mechanical secondary carb. It should be jetted 70 primary, 85 secondary with a 6.5 power valve and .031 shooters. It's probably a bit big for a mild 350, but can be tuned to run well.
Thread Starter
Racer
Joined: Jan 2008
Posts: 386
Likes: 0
From: macks creek mo
The "W" on your manifold shows it is a GM manifold cast at the Winters foundry. It's a good manifold.
The 4780-2 is a Holley 4150 800 cfm mechanical secondary carb. It should be jetted 70 primary, 85 secondary with a 6.5 power valve and .031 shooters. It's probably a bit big for a mild 350, but can be tuned to run well.
The 4780-2 is a Holley 4150 800 cfm mechanical secondary carb. It should be jetted 70 primary, 85 secondary with a 6.5 power valve and .031 shooters. It's probably a bit big for a mild 350, but can be tuned to run well.
Drifting
Joined: Jan 2006
Posts: 1,944
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From: Yooperville MI
You have an over-the-counter replacement 1970 LT-1 (Camaro or Vette) intake. It's identical to the 3972110 casting number which came OEM on '70 LT-1's. As said it's a good manifold and probably worth a few bucks.
Thread Starter
Racer
Joined: Jan 2008
Posts: 386
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From: macks creek mo
Thanks for info I thought it was a Lt1 because the engine was rebuilt on Lt1 specs--push rod guide plates in heads, solid lifters, screw in studs, I am trying to learn about these vettes JON
