Re: [FWDLK] RB build question

[Dave Homstad <dhomstad@xxxxxxxxxxx>]

Jim, 

My expectation is that as the factory bore was increased, the water jackets were also moved to maintain a constant wall thickness after factory machining. Thinner walls could mean increased heat tranfer to the cooling system and less meat for future over bores. 

I like to stay conservative on the over bore for wall strength and cooling system heat load. I would probably go to a 426, but if engine machine specialists say your remaining wall at 440 is OK, then go for it. Can 413 heads feed a 500 stroker? 

Dave Homstad 
56 Dodge D500 

---- Jim Rawa <jrawa@xxxxxxx> wrote: 
> 
> 
> msg prev rejected, sorry if this is a repeat:
> 
>  
> ok, 
>  
> i need input from someone versed in machine work and experience with B/RB builds... i've done plenty of the typical +.030 builds on 440s, etc but havent ventured into the areas where some builders are going now due to "core shortages"
>  
> here's the scenario- a 413 has a 4.19 bore... i've done my own rough investigations into the specimen block's wall thickness to warrant a .060 overbore to std size 426 wedge pistons of 4.25....
> the real question is... the outer sand casts of the 413/426 wedge/440 are dimensionally identical [sans the 65/66 extra bosses above the oil pump for c-body mounts]... is the inner sand cast of the same mold? as in are 413's cast with thick enough walls to go the full route to std bore 440 size of 4.32??? has anyone done this? it appears so as a sample stroker has the extra bosses in a publication i recently saw, which unless its a 66 440 block.. it must be a 413 pushed out to a 4.32 bore to attain the 492 ish displacement with the 4.125 stroker crank [all numbers off the top of my head here- in case i need correcting]
>  
> so the main item at question- given ideal core alignment [minimal/no shift = concentric constance] will the 413 block handle the full 440 punch out or only the 426?? or say 426 + .030..???
>  
> i have plenty of 440s... for myself... i have a few 413s  - 1 of which is destined for a freinds resto i have underway- his plans are a future stroker- so if the block can take it- we may as well build it as a 440 for now and do the rotating assy swap in the future, keeping std 440 bore, making just shy of a 500 stroker.
>  
> experienced input greatly appreciated.
> jim
> 
> 
> 
> 
> 
> 
> 
> -----Original Message-----
> From: '57 Super D500 <57SuperD500@xxxxxxxxxxxxxx>
> To: L-FORWARDLOOK@xxxxxxxxxxxxx
> Sent: Mon, Oct 25, 2010 9:13 am
> Subject: [FWDLK] Power Car
> 
> 
> 
> Here’s something you will like, ¼ scale power cars, including several Forward Look ones:
> http://www.powercarcompany.com/Picture%20Gallery.htm
>  
> 
> 
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