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How does a Big Block fit in a C-4?

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Old Sep 20, 2002 | 09:27 PM
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Default How does a Big Block fit in a C-4?

Does a 454ci BB engine fit smoothly into the C-4 Corvette closer to the 1984 model or is it so much of a difference that you need to move things around to make room for it? :jester :smash:
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Old Sep 20, 2002 | 09:57 PM
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Default Re: How does a Big Block fit in a C-4? (Light84vette)



Smoothly, no but it will fit. The steering rack has to be moved forward enough to clear the crank pulley. The cradel needs to be notched to clear the oil pan. The a/c box needs to be replaced with one from a ZR1. And the firwall has to be modified by the brake booster, for the corner of the block and head. Other than that its a piece of cake. Its even easier to chang plugs in my big block than in my LT4.
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Old Sep 20, 2002 | 10:15 PM
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Default BB

That is beyond sweet!

umm, you have proven to us you're insane, the NOS fittings etc? :D :crazy: :cheers:
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Old Sep 21, 2002 | 02:50 AM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

UUUMMMMM I think you are my new idol! :cheers:
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Old Sep 22, 2002 | 05:16 PM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

What about the cross bar that goes across from the left to right that seems to connect the front suspension? it goes right in front of the engine theres only like and inch of clearence.
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Old Sep 23, 2002 | 05:03 PM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

That is a work of art :eek:
The twin plenums remind me of the gm raceshop ZL-1 Camaro built a few years ago. Fantastic work!
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Old Sep 23, 2002 | 08:09 PM
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Default Re: How does a Big Block fit in a C-4? (belair55)

That is a work of art :eek:
The twin plenums remind me of the gm raceshop ZL-1 Camaro built a few years ago. Fantastic work!


Awesome!!!!!!!!!!!!!!!!
:cool: :cool: :cool: :cool:
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Old Sep 23, 2002 | 08:35 PM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

Man! That's about as gorgeous as some of the pictures in the Babes section! :cheers:
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Old Sep 23, 2002 | 10:10 PM
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Default Re: How does a Big Block fit in a C-4? (Light84vette)

What about the cross bar that goes across from the left to right that seems to connect the front suspension? it goes right in front of the engine theres only like and inch of clearence.
Yea there is only about 1 inch between the waterpump pulley and that cross bar. But it still fits..
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Old Sep 23, 2002 | 10:15 PM
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Default Re: How does a Big Block fit in a C-4? (Light84vette)

Thanks for all the compliments, stay tuned to see what I'm doing to the vette next over the winter months!!!! :seeya :D :D
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Old Sep 23, 2002 | 11:03 PM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

If you moved the steering rack, which originally is in a straight line_____ then when you moved it was it out of alignment_-----_?Also can you post a Birds EYE pic of the engine in the car, to show how close it is to the front? :seeya
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Old Sep 24, 2002 | 06:58 AM
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Default Re: How does a Big Block fit in a C-4? (Light84vette)

If you moved the steering rack, which originally is in a straight line_____ then when you moved it was it out of alignment_-----_?Also can you post a Birds EYE pic of the engine in the car, to show how close it is to the front? :seeya
Alignment can be compensated with toe adjustment. Moving the steering rack forward will affect the Ackerman steering angle, to the negative side (I think) providing the tie rod locations are the same. Negative Ackerman can be helpful for high-speed cornering, but not ideal for low speed maneuvering, and will increase understeer. How much is the rack moved? Did you alter the tie rod joint radius accordingly? Did you alter steering ratio to compensate for the slower rate if the distance was increased?
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Old Sep 24, 2002 | 09:38 AM
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Default Re: How does a Big Block fit in a C-4? (Light84vette)

vetterestorer does it drive any different then befor since you have all the weight in the front now and have the stearing changed?

Jay
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Old Sep 24, 2002 | 09:03 PM
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Default Re: How does a Big Block fit in a C-4? (Light84vette)

The vetttes steering is now more responsive than before. I think it is due to the added 100lbs ( aluminum head big block only weighs 100lbs than a small block) . As far as the rack it is only in a straight line when the wheels are straight, but when turned they move forward. I just reversed the action. The rack is only 1/2 inch forward,so it did not change things all that much. The rack is never really in a straight line since steering and road conditions make the wheels move up and down, left and right. If the rack was always in a straight line you would'nt need tie rods. I'm not an engineer , I just like to have fun and do things that most won't. All I can say is the alignment went fine and it actually steers better at manuvering and high speed. Guess I got lucky!! :D
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Old Sep 24, 2002 | 11:06 PM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

Hey Vetterestorer thanks for the info on the installation process of the big block in a C-4 Vette. Another thing how many cubes are you running and how much hp are you getteing out of the Engine? Also the Big block is not so much taller that it causes no problems for hood clearence or was it a problem? :D
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Old Sep 24, 2002 | 11:32 PM
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Default Re: How does a Big Block fit in a C-4? (Light84vette)

It's making a little over 700 hp at 6700rpm without the 250 fogger :eek: As for the hood, the injection would not clear so I added a cowl induction style 3" lift to the hood that looks sweet. Although am in the process in making another hood with a trans am ram air style to it, along with the rest of it's winter makeover. (this winter I hope)
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Old Sep 25, 2002 | 09:59 AM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

Me like. Me want one. Gimme!
Sorry, you just appealed to my viking pillage the countryside part of my psyche with that one. Nice work. Does the extra weight hurt your handling?
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Old Oct 2, 2002 | 03:24 AM
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Default Re: How does a Big Block fit in a C-4? (vetterestorer)

How about a Merlin engine Block? :smash:
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