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  #1  
Unread 10-28-2009, 07:50 PM
wedged wedged is offline
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Default kPa to in/Hg conversion

I'm fooling around with tuning my XFI and kPa has never been a term in my normal use. in/Hg has, since it's what is typically refered to ie: 16 in of vacuum.

One reading I had was 45kPa. Let's assume atm. pressure for the day was 30.0 in/Hg. 45kpa is 13.28 in/Hg.

30 in/Hg is 101.5 kPa. ( 1 atm)

101.5 kPa minus 45 kpa = 56.5 kPa.
56.5 kPa = 16.7 in/Hg vacuum...

therefor 45 kPa = 16.7 in/Hg vacuum.

anyone agree ?
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  #2  
Unread 10-28-2009, 10:04 PM
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Kpa X .295 to convert to inches of mercury


45. X .295 = 13.28

56.5 X .295 = 16.6675

So I'd say you're on to somthing there -- my way is just "faster". :>)
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Last edited by GregWeld : 10-28-2009 at 10:21 PM.
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Unread 10-28-2009, 10:06 PM
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Can't you toggle your laptop interface to read Hg OR Kpa??

I think I can do this on my Accel Gen VII -- but have gotten used to reading the kpa -- since it's only a "relative" measurement...


A handy website for converting "stuff".

http://autospeed.com/cms/title_Autom...8/article.html
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I have some tools...I would someday like to have some skill using them...

I love this line:

You must be fast cause you were haulin azz when I passed you!!

'40 Ford Pickup project @ Pinkee's Rod Shop
'32 Ford Roadster
'33 Speed Cabriolet
'65 Mustang Fastback "Track Car"
'08 Lotus 2 Eleven "back up Track Car"

Last edited by GregWeld : 10-28-2009 at 10:08 PM.
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  #4  
Unread 10-29-2009, 07:13 AM
wedged wedged is offline
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I actually did think of about checking to see of I could change kpa to in/hg. I just haven't done it yet.
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  #5  
Unread 10-29-2009, 09:05 AM
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Even easier

Convert.exe


Norm
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Unread 10-29-2009, 09:50 AM
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Quote:
Originally Posted by wedged View Post
I actually did think of about checking to see of I could change kpa to in/hg. I just haven't done it yet.
I searched the Fast XFI operations manual (since my buddy uses FAST - I loaded the manual files on my laptop so I could help him with his wiring etc).. and I couldn't find how you could switch the scale readout.

Maybe Jody knows if this is possible in the FAST system.

Either way - you've got your calcs down pat...


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I have some tools...I would someday like to have some skill using them...

I love this line:

You must be fast cause you were haulin azz when I passed you!!

'40 Ford Pickup project @ Pinkee's Rod Shop
'32 Ford Roadster
'33 Speed Cabriolet
'65 Mustang Fastback "Track Car"
'08 Lotus 2 Eleven "back up Track Car"
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  #7  
Unread 10-29-2009, 10:56 AM
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Quote:
Originally Posted by GregWeld View Post
I searched the Fast XFI operations manual (since my buddy uses FAST - I loaded the manual files on my laptop so I could help him with his wiring etc).. and I couldn't find how you could switch the scale readout.

Maybe Jody knows if this is possible in the FAST system.

Either way - you've got your calcs down pat...


doesn't look like you can switch from KPA to psi like BS3 or some others. No big deal, you get used to it and I used simple converter tools like above when I needed an exact boost or vacuum level.

Jody
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