vortec heads

[Len Sabatine]

   I'd like to add, total deck clearance @ .040 is safe, so pistons don't 
get into the heads,
   if the engine gets away from tire spin .etc. Better than sweeping rod 
bearings off bottom
   of pan ! In any case production rod bolts should be replaced with 
aftermarket Hi Strength
   for added insurance. Installation of new rod bolts requires rod BE 
resize to negate TIR.
   Len

>Your correct on all counts.
>far better to use a dished piston, to even further min the squish area, CR
>permitting.   You want to get the greatest volume of gas as close to the
>plug as possible.
>PS   Just remember that rods stretch a far amount at high rpm
>Bruce
>
>
>
> > One more thing that I have heard is very critical with SBCs is the
>clearance
> > between the top of the piston and the flat machined part of the head (I
>think
> > this is what they refer to as the 'squish' area).  This should be kept to
>a
> > minimum.  I have heard that putting in thick head gaskets to lower the
> > compression ratio will actually cause MORE detonation due to having
>increased
> > this clearence.
> > I probably got some of my terminology wrong, so somebody please straighten
>me
> > out!
> > Ted
>
> > > I'll tell ya, since I can't get the GN to detonate (with what I call a
> > >  reasonalbe tune), next motor is gonna be a 9 or 9.2ish CR job (with
>barrier
> > >  coatings).....
> > >  The Regal has flat tops for 9.5 with a 56cc chamber (AL), and that is
> > >  another one that is another one that is real hard to detonate.
> > >
> > >  The GN has run 20d timing at 20 PSI of  boost on 92 Octane, and only
>once
> > >  did it tickle the K/S and that was on the 2-3 shift for 2d.  40#er
> > >  injectors.  I think the smooth chambers, and 195 operating temp with
>the
> > >  cooling system right are the big answers here.
> > >  Bruce
>
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