Simple question, need a boost gage, is it best to work in psi or bar?

Figure psi is more precise (its increments are smaller)

 

The choice I had was 1 PSI or 0.5 bar increments! Guess which I chose.

 

I think it comes down to preference. You brits seem to prefer lambda and bar where I prefer KPa and AFR and the majority of those south of us (Americans) prefer PSI and AFR.

The precision of your meter is dependant on the meter.

-Michael

 

14.7 psi = 1 bar

if your interested !

 

14.5 PSI = 1bar not 14.7

 

hahaha black was wrong!!!

sorry but for inturding but i know this man... apparently


hahaha

 

We can all be wrong, especially if we are from Dunfermline

 

Mine's in Kg/cm2 - typical

Justin

 

i thought being from dunfy we were automatically wrong

anyways... i was origionally born in kirkcaldy - no room at the inn or sommit when i was coming out (no not gay!) so i was popped in farth park hospital, so actually i'm from kirkcaldy... i hope that means not even more wrong... tee he he

J

 

Funny looking kid normal for Kirkcaldy (FLKNFK) apparently used to be an abbreviation in medical notes according to some medical lecturer in Edinburgh. I used to work in Forth Park but never wrote this in any notes. All the babies were lovely honest! Anyway I think it is cruel! But very funny and possibly true Fifers are a weird lot. I live here (for now) but am actually English for my sins. Anyway, how do we drag this back to PSI and bar?

[Edited by john banks - 1/28/2002 8:34:27 PM]

 

my mum and dad are english... in fact i'm the only one in my whole family who wasn't born in Scotland!

I know a doctor who's just moved to aussie who worked in leven for a year... they all used to put 'Kappa Positive' on their patients notes if they were of the 'Ned' variety... apparently a common one is that.

Oh yeah.. back to PSI...

what PSI will my normally aspirated 155 2.0 TS 26v be putting out?

J

 

I know one who worked in Leven for a year (MIH) flatmate for five years and he was my best man at my wedding but has now gone to NZ not Aus - same chap?! I took his dad out for a blast in my Scooby and had a fabulous launch at 5000rpm - he LOVED it. Small world.

26 valves?

[Edited by john banks - 1/28/2002 10:29:52 PM]

 

Getting back to pressures, at my school 1 Kg/cm2 = 14.7 psi
Although it is frequently rounded down to 14.5 for easy translation.

CC

 

Big Red Cheese wedge

 

26V he he I missed that the first time

you want the 24 volt one bigger battery bigger spark = more go

 

Ah - but 1 kg/cm is slightly less than 1 bar....makes you wish the manufacturers would settle on a single unit

Richard

 

1 Bar = 14.50377 PSI

Raymond (In pedantic mode )

 

 

1kg/cm2 = 0.98 Bar, 1 Bar = 14.50377 PSI

[Edited by WREXY - 1/29/2002 1:22:55 PM]

 

****... i meany 16 v DOH!

16v - 16 volt battery.. honest guv... - bigger battery = bigger spark = more go.. correct black!

J

 

14.50377 - NO
14.50377246528572236255764575912722164651546675155 1456641446672171
If you want to be exact. Sorry couldn't resist.

Do you know Martin then 26 valve guy?

 

Aside from this, can someone explaing what inturding means?

I am sure I know what it was meant to say, but there is something funny about that typo.

 

Adam M I thought you were the master of typos?

 

Interesting question, this conversion rate...

I have just tried five different conversion sites on the net (www.google.com for "pressure conversion") and found that the answer seems to be somewhere in the area of 14.5psi and 14.695948776psi. What international standards institution site might we find the definitive standard conversion rate from? Any ideas?

Moray
bbs.22b.com

 

"1kg/cm2 = 0.98 Bar, 1 Bar = 14.50377 PSI"

I thought WREXY had it best as above?

But don't know the answer Moray - how about searching on SI unit conversions?

BTW I was TTP with my last post! I could never be that accurate it would make me look stupid Only silly people quote to far too many sig figs to try and look clever

 

Just went to National Physics Laboratory site. Used SI Unit "Pascal"s to check the conversion rate. Thought I could trust NPL unti to pascal conversion rates... maybe I'm to trusting.

Anyways...
1Bar = 100,000 Pa (exact by NPL)
1PSI = 6794.76 Pa (rounded by NPL)

so 100,000Pa / 6794.76Pa gives a ratio of 14.50377 (According to Intel and Microsoft Excel).

Thus, according to the NPL, Microsoft and Intel, the conversion is, roughly speaking, about 14.50377PSI to 1Bar

I would like to know why 14.7ish is also in circulation as a figure... I suspect the americans have something to do with it.

Moray
bbs.22b.com

 

One of the sources has 6sf but the result is to 7sf

 

1 atmosphere is 14.69595 PSI. Its units of measure is ATM on my unit converter. Apparently it is the international standard atmosphere which is 101325 Pa. So there, **** knows what a bar is then.

Justin (with time on his hands )

 

1 Atmosphere = 14.696 psi
1 Bar = 14.503 psi
1kg/cm2 = 14.223 psi

So suggest you check what your gauge is calibrated in before converting !

 

Get a gauge thats reads in P.S.I. Its a lot easier to set up the max boost on them.
Also none of the aftermarket gauges are 100% accurate, so a gauge that reads in P.S.I, and normally callibrated in increments of 1`P.S.I will give you more accuracy (safety) than one in BARS with a greater scale, due to the inherent conversion of Bars to P.S.I.
Just my two cents worth.
I got a good deal on Autometer boost and air/fuel gauges from

http://www.extrememotorsports.com/g2cat/bstgauge.htm

Autometer -30-0-30 PSI Boost Gauge - White Face(Product# EXM0607)
Autometer Air/Fuel Gauge - White Face (Product# EXM0303)

They match the original cars white face gauges perfectly!