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  #16 (permalink)  
Old 10-29-2008, 11:40 PM
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Don't go 60 over on a 400.....

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  #17 (permalink)  
Old 10-29-2008, 11:42 PM
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4 bolt v 2 bolt

With respect to SBC 400s, the 4 bolt main blocks are actually weaker then a 2bolt main.... also, forgot to mention that I'm using the production cast crank with my hp levels... for two reasons... I can build 3 400s for the price of a crank; and the car isn't a daily driver - so if it does go boom; it's more entertaining then aggreviating.
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  #18 (permalink)  
Old 10-30-2008, 12:34 AM
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Quote:
Originally Posted by stoneshrink
With respect to SBC 400s, the 4 bolt main blocks are actually weaker then a 2bolt main.... also, forgot to mention that I'm using the production cast crank with my hp levels... for two reasons... I can build 3 400s for the price of a crank; and the car isn't a daily driver - so if it does go boom; it's more entertaining then aggreviating.
I wish to disagree respectfully...

4-bolts are not weaker. The 2-bolt blocks have more meat in the main webbing, but the hierarchy of general "strength" goes like this: 2-bolt, 4-bolt, and the strongest is a 2-bolt block machined for 4-bolts. But to say that 4-bolt blocks are weaker is not the case.
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Old 10-30-2008, 04:09 AM
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Quote:
Originally Posted by stoneshrink
With respect to SBC 400s, the 4 bolt main blocks are actually weaker then a 2bolt main.... also, forgot to mention that I'm using the production cast crank with my hp levels... for two reasons... I can build 3 400s for the price of a crank; and the car isn't a daily driver - so if it does go boom; it's more entertaining then aggreviating.

i guess, BUT if you drive over your crank and crash, just exactly how much cheaper was it?


just a thought...
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  #20 (permalink)  
Old 10-30-2008, 09:42 AM
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alien

But then the aliens will come down and keep me from crashing after I drive over my crank.

As for the weaker comment - I appreciate your viewpoint; but here is why I say that the 4 bolt main block is weaker. 1) the webbing on a 4 bolt main 400 is tapered where it connects to the sidewalls of the block - it is at that point that the other bolts connect to the main webbing... thus actually being less metal makes it weaker. 2) drilling more holes in a block does not make it stronger. 3) there is a 4 bolt that is stronger - that is where you buy aftermarket caps with splayed side bolts - which hold to the casing of the block. The problem with splayed caps is more financial then anything else as a DART block costs (without the inherent weakness) about the same as it does to buy the splayed caps and have them machined into the block.

But I understand that aliens are bringing a new block from Mars and that will fix all the other problems..... too much sarcasm? naw
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