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Old 11-01-2005, 06:49 PM
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454 BBC Vs. 454 SBC differences and why...?

Mainly interested in hearing real differences like torque curves and HP potential on both sides...? I know the 454 SBC is still rather exotic but is becoming more and more frequent but is it worth the extra $$$...?

Is the internal rotating mass the major factor in the torque of a BBC or does the larger valve size in the heads make alot of it...?

Dont want a pissing contest just real world opinions with facts to back them up... (numbers and graphs would really help...)

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Old 11-01-2005, 08:05 PM
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I wonder how much the benefit of the bigger heads available for the BBCs is offset by the lighter weight of the SBC?
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Old 11-02-2005, 11:32 AM
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A BB with alum heads and intake will bring the weight down close to a stock 350. The price is about a fifth.
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Old 11-02-2005, 01:20 PM
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Engines

There is no simple answer to this question... All the pros and cons will depend on the application of the engine.....

If you are looking at just bottom line max effort hp/torque the big block will always win out. If you find the best flowing trickest small block head to bolt on that 454 small block ( little cheifs) it's still 100 cfm short of a top of the line big block head, not to mention what the state of the art big block heads flow,,, then you get into bore spacing, bore diameter, head design, etc and it's all in favor of the big block....

Now if you have a road race car that is front end heavy and the rules allow a 454 ci small block you may be onto something.....or a drag class that gives some big weight brake to the small block...but is a ci to weight class...then there might be an advantage....

There is another problem with the small blocks, with the deck height you will end up with the pin into the oil ring,,not a trick deal on a driver engine..

Just way to many things to make a good a-b-a compairison... IMO

If you watch any of the heads-up style racing the small block cars can run good numbers but are always hurt till the end of the event....unless they are turbo cars and most of them run in classes where the big block turbo is not allowed....

Keith
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Old 11-02-2005, 01:26 PM
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There is another problem with the small blocks, with the deck height you will end up with the pin into the oil ring,,not a trick deal on a driver engine..
Eagle builds a tall deck aftermarket small block especially for these build ups so you don't have to use these pistons. But its pricey.
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