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 charge 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
>
> So when the MP gauge reads 45" that is referenced then to a vacuum.
> So 45" Hg = 22.1psi - 14.7psi = 7.4psi
>
> That makes more sense.
> Can anyone comment on Q2. in my previous post?
>
> Cheers
>
> Steve Izett
>
>
> On 26/09/2011, at 10:06 PM, John Slade wrote:
>
>> 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.
>>
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