396ci 350hp L34 refresh/rebuild - Team Camaro Tech
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post #1 of 10 (permalink) Old Jul 14th, 14, 09:01 AM Thread Starter
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Dave
 
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396ci 350hp L34 refresh/rebuild

The born with 396 from my 69 SS has a whiffed cam. The crank, cylinders and everything else looks great including the original heads. I didn't mic anything yet, but it all looks good to the naked eye. The motor was pulled in ~'82/83 at ~100k miles and a 454 was run since then. I'm putting the 396 back in after I'm done the body.
I'm in the research stage trying to figure out what I'm going to do. The way I figure it I have three choices:

1. Throw a cam in it with new push rods & lifters, clean up the valves, re-gasket everything and call it a day for budget reasons.
2. Completely rebuild it myself with new rings etc.
3. Drop it off to a machine shop and say "fix it." (Something I never do...)

I'm leaning towards #2, but if it has good compression why bother with rings? I don't have deep pockets, but I want it done right. I'm anal with details and I luckily have a father I can still lean on for advice/how to info. He used to race in the 60s/70s and he's built plenty of engines. Sometimes I don't like the old school way of doing things though so I'm looking for other options/opinions so I can weigh it all out. I want the car to end up basically factory with a few exceptions, but more horsepower & torque from a better cam, intake etc is where I want to be. Recomendations on a cam, lifters & pushrods etc would be appreciated.








'69 SS396 X66 L34 08D M21 BS
460ci Gen VI 9.75:1 AED 950 carb
241/249 @ .050" .625/.625 110 LSA

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post #2 of 10 (permalink) Old Jul 14th, 14, 09:28 AM
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Brian
 
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Re: 396ci 350hp L34 refresh/rebuild

Boy, an engine with 100k miles on it that has been sitting for 31 years, I think I'd have to go with option 2.

Experience...... It's what you get when you didn't get what you wanted.
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post #3 of 10 (permalink) Old Jul 14th, 14, 10:54 AM
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Re: 396ci 350hp L34 refresh/rebuild

Yep. #2.

One owner 69 Camaro,(yep, bought it new
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post #4 of 10 (permalink) Old Jul 14th, 14, 11:02 AM
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Re: 396ci 350hp L34 refresh/rebuild

X3 #2 with a Roller Cam

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post #5 of 10 (permalink) Old Jul 14th, 14, 11:17 AM
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Re: 396ci 350hp L34 refresh/rebuild

If the cylinders are in good shape, just slapping a set of rings in it is not going to hurt. If you have it torn down anyhow, why not? Rings are not expensive. Plus, piece of mind is always a nice thing. A roller cam would definitely wake that engine up. I ran this cam in a 468 i had years ago, will work in your motor, made stupid torque for what it was. In my 69 camaro, i ran 11.80's at 117 if i remember correctly. It wasn't crazy radical, idled pretty nicely, little bit of lope to it, and while it is rated to 5500, it would continue to pull pretty hard to 6200. I had a stock bottom end, this cam, trw flat tops, and crane gold roller rockers. So a pretty simple setup.

http://www.jegs.com/i/Comp+Cams/249/...Fabm7AodMUcA4w

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post #6 of 10 (permalink) Old Jul 15th, 14, 11:13 AM Thread Starter
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Dave
 
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Re: 396ci 350hp L34 refresh/rebuild

I guess my gut was right... thanks guys.
That was exactly what I was looking for Sean. The cylinders look mint. That cam seems perfect for what I want. Nothing too radical, but will wake it right up. Now with a roller cam, I'm going to need new roller lifters, rocker arms, springs and push rods right? What ratio would be good? What do you think about the stock heads and having 10.25:1 compression. I saw you had flat tops. Did they drop the compression?

'69 SS396 X66 L34 08D M21 BS
460ci Gen VI 9.75:1 AED 950 carb
241/249 @ .050" .625/.625 110 LSA

Semper Fi!

"The galleries are full of critics. They play no ball, they fight no fights. They make no mistakes because they attempt nothing."
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post #7 of 10 (permalink) Old Jul 15th, 14, 11:50 AM Thread Starter
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Dave
 
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Re: 396ci 350hp L34 refresh/rebuild

A couple other things to consider... Are my Weiand 2p and Holly 3310-3/750 cfm vac secondary going to a good match?
With this being the born with engine, I don't want to bore it or modify anything permanently if I can help it. It's going to get a good cleaning, some fresh paint and I might polish the heads a little.

'69 SS396 X66 L34 08D M21 BS
460ci Gen VI 9.75:1 AED 950 carb
241/249 @ .050" .625/.625 110 LSA

Semper Fi!

"The galleries are full of critics. They play no ball, they fight no fights. They make no mistakes because they attempt nothing."
HawkX66 is online now  
post #8 of 10 (permalink) Old Jul 15th, 14, 12:48 PM
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Re: 396ci 350hp L34 refresh/rebuild

Oh oh, like my wife tells me that her mother told her many times, one thing leads to another. Maybe you should clean up this motor, bag it and set it aside and run something you can beat on.

One owner 69 Camaro,(yep, bought it new
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RS SS Hugger Orange, L88, 4:10's tru-tack posi, ducted hood, Endura, spoilers.
TH400 (CX) with Coan 8" converter, GV-OD, 8 track still on console and best et 10.495,
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128.79mph 1.428 60'
All with 1960's stuff. (except tires and converter)
+ MT Super Scavenger headers & 3" full exhaust with X pipe. 3700 lbs. with me in it.
1000cfm AED and HD Harold-Lunati SR, 725 lift with shaft rockers too.
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post #9 of 10 (permalink) Old Jul 19th, 14, 07:16 AM Thread Starter
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Dave
 
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Re: 396ci 350hp L34 refresh/rebuild

Quote:
Originally Posted by sgthawkusmc View Post
with a roller cam, I'm going to need new roller lifters, rocker arms, springs and push rods right? What ratio would be good? What do you think about the stock heads and having 10.25:1 compression. I saw you had flat tops. Did they drop the compression?

Quote:
Originally Posted by sgthawkusmc View Post
Are my Weiand 2p and Holly 3310-3/750 cfm vac secondary going to be a good match?
With this being the born with engine, I don't want to bore it or modify anything permanently if I can help it. The block is on it's standard bore and I'd like to keep it that way. It's going to get a good cleaning, some fresh paint and I might polish the heads a little
.

Quote:
Originally Posted by Fred Ficarra View Post
Maybe you should clean up this motor, bag it and set it aside and run something you can beat on.
That's what the 454 was for. I want the 396 back in it now. I'll build something to beat on later.

'69 SS396 X66 L34 08D M21 BS
460ci Gen VI 9.75:1 AED 950 carb
241/249 @ .050" .625/.625 110 LSA

Semper Fi!

"The galleries are full of critics. They play no ball, they fight no fights. They make no mistakes because they attempt nothing."
HawkX66 is online now  
post #10 of 10 (permalink) Old Jul 19th, 14, 09:18 AM
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B
 
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Re: 396ci 350hp L34 refresh/rebuild

Since the engine is out why not #2, no worries later on.

Formers: 1969 RS 350, 700HP 1967 Flash-in-a-pan Firebird 400, 2002 Z28 M6 1SC/1SZ
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