[V8] turbo v8

[sdewitt@stx.rr.com]

Nate,

Aren't the cylinders just etched with an acid solution that eats away 
the aluminium, leaving the harder silicon? I know the early buick V8's 
were built this way and were "Unbuildable" until someone bored one out 
and acid etched the cylinders. I remember reading in the new product 
literature that the v8 engine used a high silicon content block, which 
made this process feasable....

----- Original Message -----
From: Nate Stuart <newt at motorgeek.com>
Date: Monday, August 29, 2005 4:42 pm
Subject: Re: [V8] turbo v8

> And due to that process you can't _just_ bore these motors out, they
> either have to be sleeved, or have the cyl wall treatment 
> reapplied(goodluck there). Sleeving gets tricky with a larger 
> bore, you need enough
> material between the cyl walls to support the sleeves press fit, 
> while now
> bowing the aluminum in the adjacent wall, or intruding on it's 
> space. I
> talked in great length about this with my local machine shop engine
> builder guru and after we punched a pile of numbers he was only 
> confidentin maintaining the 81mm bore when sleeving. Which is what 
> I was after
> anyway since that'd allow a set of non-elf crafted forged pistons 
> to be
> used.
> 
> But I've yet to blow up my v8tt, so I haven't bothered getting one 
> sleeved.
> 
> Take care,
> -Nate
> '89 90v8ttq
> '90 v8q
> 
> > I for certain am no expert on this matter Sean -
> > but AFAIK, there are no OEM or aftermarket pistons available for 
> the V8
> > weather
> > it be a 3.6 or 4.2. In fact, I don't think you can buy ANY 
> bottom end
> > parts for
> > a V8. (meaning crank, bearings, rods or pistons)
> > This is due to the "siliconized aluminium" cylinder bore. The 
> pistons have
> > a
> > special plating that apparently only elves can apply deep in the 
> Black> Forest.
> >
> > Look before you leap with this motor.
> >
> > Dave
> >
> >
> >
> > Quoting spcole at mn.rr.com:
> >
> >> I know this might have already been discussed in the list but i 
> have>> been out of town for several weeks and heard that there was 
> an on goin
> >> discussion and had a proposal for debate. I am the owner of a 
> 3.6L v8
> >> out of a 90 V8 this is to be the new power plant for my 91 CQ i 
> have>> been looking and parts for this motor and it dawned on me 
> that if the
> >> 4.2 is the same casting only bored and stroked you could make a 
far
> >> supior 4L that would be ideal for a twin turbo application.  
> does anyone
> >> know if my crazy idea would work with a 3.6L with the 93mm 
> crank and
> >> 82.5mm pistons. this i belevie would be a far more durable 
> motor then
> >> the 4.2 and would be able to go to higher rpms.  if anyone 
> knows if this
> >> would work please let me know because i am seriosly lookin at 
> buildin>> this motor and runnin it normally aspirated for now but 
> it would only
> >> need a piston swap for the tt conversion and would most likly 
> be running
> >> a coil per cylinder igintion system from electromotive.
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