Jim,
How are you measuring the pitch setting on the IVO?

Joe


On Tue, July 11, 2006 8:51 am, James Maher wrote:
> Kelly,
> I have seen 5580 RPM max static with the IVO at about 60" pitch setting.
> The static RPM drops down to about 5330 with the prop in the mid range of
> 75".
> Jim
>
>
> Kelly Troyer <keltro@att.net> wrote:
>
>
> SNIP
>
>
> By the way what max static rpm are you
> getting with the "IVO"..........IMHO --
> Kelly Troyer
> Dyke Delta/13B/RD1C/EC2
>
>
>
>
>
>
> -------------- Original message from James Maher
> <deltaflyer@prodigy.net>: --------------
>
>
> The setup:
> ·        Engine/Model/Year: 13B 6 port NA mixed
> ·        Source Condition: David Atkins Rebuilt for Aviation Application
> ·        Modifications: Ported intakes and cooling for 180HP
> ·        Intake: Atkins short manifold w/TWM 48mm Throttle body
> ·        Exhaust: 321 SS tangential muffler
> ·        Engine Control: RWS EC2
> ·        Fuel Control: 4 Mazda 460cc Injectors, pri. in block & sec in
> manifold ·        Fuel Pumps: RWS
> ·        Cooling System: 2 – 9”x13”GM evaporator cores with 0.75” auto
> hose, stock water pump with 180F deg.-thermostat, 50/50 glycol\water mix.
>  ·        Oil System: stock 1986 oil cooler
> ·        Installation: conventional – self built mount
> ·        PSRU/Re-Drive: Ross 2.85:1
> ·        Prop: IVO Magnum 74" 45-105”pitch in-flight adjustable
> ·        Power: 180HP?
>
>
> The issue:
> On the ground, cooling stabilizes at 180-190F deg and oil is usually 10
> degrees below the cooling with an OAT of 65-70F deg. When running with
> higher OAT (75-85F deg) after about 0.5 hours of moderate taxi runs (up
> to 4300RPM) the cooling temps reach 212Fdeg with the oil about 200F deg.
>
> The question:
> Can something be done to get lower operating temperatures without
> redesigning the system? Would switching to pure water help and if so by
> how much? Would removing the thermostat help and if so by how much?
> How much change should I expect if I were to do both?
> You guys down south should have a good idea of how best to enhance
> cooling. What are your suggestions?
> Thanks,
> Jim Maher(Dyke Delta)
>
>
>
>