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Dec 22, 2001 | 04:27 AM

IWNTA20B

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From: WEST

metric redaing

Does anybody know the metric vacuum conversion to inches?
I forgot what the formula was. As you all know the Japan boost/vacuum gauge are all in metric .

Dec 22, 2001 | 05:53 AM

IWNTA20B

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Damn typo. It should read " Metric Reading".

Dec 22, 2001 | 06:24 AM

HAILERS

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This thread and answer by *IRV* http://www.rx7forum.com/showthread.p...threadid=16779

Dec 22, 2001 | 07:32 AM

IWNTA20B

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Thanks. I saw that but how do you read vacuum cm/Hg into in/Hg?
Say for instance 30 cm/Hg? What does that convert to in/Hg?

Dec 23, 2001 | 04:51 AM

HAILERS

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From: FORT WORTH, TEXAS,USA

1cm = .3937in and http://www.flowmeter-calibration.com....html#pressure and put 300 where it says mm/hg and get 11.81 in/hg. And I just noticed if you use that conversion table and put in say 300mm/hg and hit *convert*, that over there on the far left where it says *psi*, that it reads 5.8 which coincides with Irv's table. We're double checking your figures, Irv!

Last edited by HAILERS; Dec 23, 2001 at 05:08 AM.

Dec 23, 2001 | 01:08 PM

IWNTA20B

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Ahh....cool. Thanks Hailers.

Dec 23, 2001 | 01:59 PM

RETed

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Quote:

Originally posted by IWNTA20B
Ahh....cool. Thanks Hailers.

Most Japan gauges run mmHg in vacuum.&nbsp To convert to inHg, divide by 25.4 - 500mmHg = ~20inHg.

Most Japan gauges run kg/mm^2 in boost.&nbsp To convert to psi, multiply by 14.2 - 1.0kg/.mm^2 = 14.2psi.

-Ted