Re: [FWDLK] RB build question

[William Huff <whuff@xxxxxxxxxx>]

Can always take it to a good shop and have the 
cylinder walls sonic tested for thickness.  I 
think I have read that .200" is a good figure not 
to go below.  Also may run into ring seal problems if the walls are too thin.

Bill Huff


 Homstad wrote:
> 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
> >
> >
> >
> > Hereâ??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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