Dick; sounds about right to me. Doug
Dick J wrote:
>
> So then my decision to use a 6800 RPM red line
> once I get the Dart heads should be agood choice,
> no?
>
> Dick J
>
> --- DOUG ODOM <popms@thegrid.net> wrote:
> > Dick; 4000 ft.min with a 3.48 stroke would be
> > 6900 RPM.
> >
> > Dick J wrote:
> > >
> > > How may RPM does 4000 Ft. Min produce?
> > >
> > > Dick J
> > >
> > > --- DOUG ODOM <popms@thegrid.net> wrote:
> > > > Dick; 7500 will give you a piston speed of
> > 4350
> > > > ft.min. Stroke (inches)
> > > > X 2 X RPM / 12 . That is OK if you have
> > forged
> > > > pistons and steel crank
> > > > with good rods. Anything over 4000 ft.min.
> > with
> > > > stock parts is scary.
> > > > Now I'm not going to tell you that I have
> > never
> > > > built a dyno grenade
> > > > with lots of stock parts just to check some
> > > > wild idea I had. I would put
> > > > in a cam that made power in the 6500 range.
> > You
> > > > can run it past that in
> > > > the gears getting up to speed because you
> > shift
> > > > back to a lower RPM so
> > > > quick. I can give you a list of cams we
> > have
> > > > used that fill that
> > > > bill. Doug Odom in big ditch
> > > >
> > > > Dick J wrote:
> > > > >
> > > > > So if I read this right, once I get some
> > Dart
> > > > > heads and a good cam kit, 7500 should be
> > my
> > > > > absolute redline. Obviously, I'd be
> > safer at
> > > > > 6800-7000?
> > > > >
> > > > > Dick J
> > > > >
> > > > >
> > > > > --- DOUG ODOM <popms@thegrid.net> wrote:
> > > > > > Dick; Rev limit is determined by the
> > stroke
> > > > > > and piston design in the
> > > > > > lower end. My E motor with 2.7 stroke
> > at 9
> > > > > > grand has the same piston
> > > > > > speed as a 3.48 stroke ( 350 Chevy) at
> > 7500
> > > > > > rpm. Valve float or bounce
> > > > > > is the Rev limiter in the top end of
> > the
> > > > motor.
> > > > > > It would do you no good to build
> > a
> > > > motor with
> > > > > > a roller cam, rev kit,
> > > > > > and Titanium valves, then put the heads
> > on
> > > > a
> > > > > > block with stock cast
> > > > > > pistons and crank. You can only go as
> > fast
> > > > as
> > > > > > the weakest link will let
> > > > > > you go. You might go around to the
> > local
> > > > roundy
> > > > > > round track and talk to
> > > > > > who builds the good motors for them.
> > They
> > > > have
> > > > > > to live and make horse
> > > > > > power. Doug Odom in big
> > > > ditch
> > > > > >
> > > > > > Dick J wrote:
> > > > > > >
> > > > > > > Not knowing a lot about Chev small
> > > > bolocks, I
> > > > > > set
> > > > > > > a self-imposed red line of 6200. I
> > did
> > > > wind
> > > > > > it
> > > > > > > right to 6200 on my last run, and
> > that
> > > > limit
> > > > > > > still managed to put me into the
> > record
> > > > book,
> > > > > > but
> > > > > > > I'm wondering what a reasonable
> > red-line
> > > > > > should
> > > > > > > be. I don't want to be breaking
> > motors,
> > > > but
> > > > > > I
> > > > > > > do want to see what it can do. This
> > is an
> > > > > > > all-stock Chev 350, 4 bolts, stock
> > > > rockers
> > > > > > and
> > > > > > > springs in 882 (76cc) Chev head
> > castings,
> > > > > > flat
> > > > > > > top pistons, and a cam that specs out
> > at
> > > > 260.
> > > > > > My
> > > > > > > plan for spring is to install an
> > electric
> > > > > > water
> > > > > > > pump and electric fan. The motor
> > would
> > > > have
> > > > > > > wound just a little more this year,
> > but
> > > > with
> > > > > > > those changes, it will hopefully have
> > > > just
> > > > > > enough
> > > > > > > more power to allow a little tighter
> > > > winding
> > > > > > > (valve train permitting, of course).
> > What
> > > > do
> > > > > > you
> > > > > > > guys think the max RPM for that motor
> > > > should
> > > > > > be?
> > > > > > >
> > > > > > > =====
> > > > > > > * * * * * * * * * * * * * *
> > > > > > > * Dick J *
> > > > > > > * (In East Texas) *
> > > > > > > * # 729 *
> > > > > > > * C/GRS C/FRS D/STR *
> > > > > > > * * * * * * * * * * * * * *
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> __________________________________________________
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> > > > >
> > > > > =====
> > > > > * * * * * * * * * * * * * *
> > > > > * Dick J *
> > > > > * (In East Texas) *
> > > > > * # 729 *
> > > > > * C/GRS C/FRS D/STR *
> > > > > * * * * * * * * * * * * * *
> > > > >
> > > > >
> > > >
> > >
> >
> __________________________________________________
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> > >
> > > =====
> > > * * * * * * * * * * * * * *
> > > * Dick J *
> > > * (In East Texas) *
> > > * # 729 *
> > > * C/GRS C/FRS D/STR *
> > > * * * * * * * * * * * * * *
> > >
> > >
> >
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>
> =====
> * * * * * * * * * * * * * *
> * Dick J *
> * (In East Texas) *
> * # 729 *
> * C/GRS C/FRS D/STR *
> * * * * * * * * * * * * * *
>
> __________________________________________________
> Do You Yahoo!?
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