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Another Big Block install

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Old May 3, 2014 | 10:27 AM
  #1  
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Default Another Big Block install

With the hood on, radiator in, 4 speed tranny on wood blocks. We finished rebuilding the motor and slammed it in yesterday. When we quit last night it was was ready to prime the oil pump and get ready to fire it.

I could never figure out why anybody would remove the hood or even try to install with the motor connected to the tranny

So today is the cam breakin. It is a .040 over 427 forged flat tops closed chamber heads with larger valves and some work. Crane h-flat cam









Last edited by gkull; May 3, 2014 at 03:58 PM.
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Old May 3, 2014 | 10:47 AM
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Looks awesome

I love pictures like that! !!!!




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Old May 3, 2014 | 10:48 AM
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Very nice and the BB are fun. What intake, carb, air filter did you go with to clear the factory BB hood?
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Old May 3, 2014 | 11:57 AM
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very nice
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Old May 3, 2014 | 12:15 PM
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Originally Posted by gkull
I could never figure out why anybody would remove the hood or even try to install with the motor connected
I can! If you have nobody to help you and you have to install the engine and an automatic tranny by yourself, it's a lot easier with them connected and the hood and radiator support removed, especially if you are working on jack stands and don't have room for a tranny jack. With help it's a different story.
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Old May 3, 2014 | 12:55 PM
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Looking good, what will happen with your 383?
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Old May 3, 2014 | 01:03 PM
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A big-block 'vette is basically a great big engine with a steering wheel and a place to sit. Awesome!

Scott
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Old May 3, 2014 | 04:21 PM
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Originally Posted by 68Thunder427
Very nice and the BB are fun. What intake, carb, air filter did you go with to clear the factory BB hood?
We do c1, c2, c3 vette mechanical side jobs here in Reno Nevada. The owner of this 68 wants things his way. So it has a square port aluminum GM intake, 750 carb, dropped base K&N.
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Old May 3, 2014 | 04:29 PM
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Originally Posted by c3_dk
Looking good, what will happen with your 383?
Like I said, We do c1, c2, c3 vette mechanical side jobs here in Reno Nevada.

So this is not my car. We ran a similar motor on the engine dyno a few years ago and it had 492 HP @ 6200 and 541 TQ
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Old May 3, 2014 | 08:14 PM
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George, I thought you came over to the "Dark (BB) Side" for a second.
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Old May 3, 2014 | 10:53 PM
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Originally Posted by Super6
George, I thought you came over to the "Dark (BB) Side" for a second.
This .040 overbore 427 BBC comes out to just under 435 ci. the weight penalty can't compete with my 434 small block. Well maybe longevity!
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Old May 4, 2014 | 08:18 AM
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Originally Posted by gkull
This .040 overbore 427 BBC comes out to just under 435 ci. the weight penalty can't compete with my 434 small block. Well maybe longevity!
Just kidding, didn't think for one second that that was an engine going into your hot rod Vette.

Same overbore on my "427". Have gone for longer strokes since then.
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Old May 4, 2014 | 08:21 AM
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Originally Posted by 68Thunder427
Very nice and the BB are fun. What intake, carb, air filter did you go with to clear the factory BB hood?
That intake looks to be from a '71 454/425 LS6. I've got one, so flat it seems runners are mostly on the underside.
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Old May 6, 2014 | 01:35 PM
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ddawson - recently posted about his dyno runs of a 427/390 with a 244/244 comp cam installed.

http://forums.corvetteforum.com/c3-t...yno-my-c3.html

This last build I used this 236/246 Saturday Night special Crane cam 134551. It pulls hard past 6000.

http://www.cranecams.com/114-119.pdf


Anybody have some idea as to why ddawson tapers off so fast.
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Old May 6, 2014 | 04:38 PM
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The hood is so light and small, I used to be able to zip it off in 3 minutes by myself using a board cut to size holding the hood off the radiator.

But anyway, good jobs not scratching anything and rev the crap out of it until that cam is broke in!!!
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Old May 6, 2014 | 04:48 PM
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It is the time taking it off and the time putting it back on.

We did the breakin 20 some minutes with just the outer springs installed like the Crane Cams directions stated. We used Joe Gibb's breakin oil with lots of assembly lube on everything. After it cooled for a bit we took the springs back out and added the inner spring. Then we went for the test drive. Rowdy big blocks are Okay. It is all done and gone with a happy owner.
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Old May 6, 2014 | 10:17 PM
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Originally Posted by gkull
ddawson - recently posted about his dyno runs of a 427/390 with a 244/244 comp cam installed.

http://forums.corvetteforum.com/c3-t...yno-my-c3.html

This last build I used this 236/246 Saturday Night special Crane cam 134551. It pulls hard past 6000.

http://www.cranecams.com/114-119.pdf


Anybody have some idea as to why ddawson tapers off so fast.
I still think ddawson has something up with the dizzy. I am not sure but if it is an adjustable aftermarket it could be in the rev limiter.
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