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From: <stevei@carey.asn.au>
To: <flyrotary@lancaironline.net>
Date: Mon, 26 Sep 2011 22:30:54 +0800
Subject: Re: [FlyRotary] Re: Boost
Thread-Topic: [FlyRotary] Re: Boost
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Thanks Dave

I didn't understand how at 22psi you where only developing ~250Hp.
That now makes sense. I thought 22psi was a really high boost.

So you are charging at ~1.5 x 100%VE (naturally aspirated) however the char=
ge temp is significantly higher.
So if your 13B would develop say 180Hp at 7K RPM without boost, and you are=
 now getting ~250Hp at 45" 200F that seems to make some sense.

Steve Izett


On 26/09/2011, at 10:18 PM, <stevei@carey.asn.au> wrote:

> Thanks John
>=20
> So when the MP gauge reads 45" that is referenced then to a vacuum.
> So 45" Hg =3D 22.1psi - 14.7psi =3D 7.4psi
>=20
> That makes more sense.
> Can anyone comment on Q2. in my previous post?
>=20
> Cheers
>=20
> Steve Izett
>=20
>=20
> On 26/09/2011, at 10:06 PM, John Slade wrote:
>=20
>> On 9/26/2011 10:02 AM, stevei@carey.asn.au wrote:
>>> If Dave is boosting to 45"Hg then am I right that that is ~22psi.
>> I think not, Steve. According to my calculations that equates to about
>> 7.5 PSI of boost.
>>=20
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>=20
>=20
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