Hi guys. Any help greatfully appretiated.

 

Can anyone tell me how to convert from kg/cm2 to psi, cos i have heard 2 different ways, and am i correct in thinking that 10 psi = 1 bar.

 

Next, can anyone help please cos not to sure what to set boost controller to. I have a blitz exhaust and air intake and have recently installed a hks evc4 boost controller but have not got an ecu upgrade. I have set the controller to 10psi (i think) but not much different. How high can I turn it without doing damage. Also would a hks fuel cut defenser be the same as a chip upgrade in this instance.

 

Cheers for any help. Paul.

 

 

Hi ya Paul have I got it right you want to know the equivelent Psi for the readout on a Jap import gauge? if so I have both so looked at them seems the scale is the same but where the psi reads 0 to +14 the jap reads 0 to +7 there a 4 equall sections the same on both gauges so which ever way you want to convert its either double or half.

Also I am sure there is 14 psi to 1 bar

Hope some help Jeff TT

Paul,

I posted an exact conversion a few months back. Search for something like mmHg and you should find it. Bear in mind that the standard boot gauge does not display particuarly accurately.

 

Andy

you have mail?

PSI Kg/cm Bar

5 0.35 0.34

6 0.42 0.41

7 0.49 0.48

8 0.56 0.55

9 0.63 0.62

10 0.70 0.69

11 0.77 0.76

12 0.84 0.83

13 0.91 0.90

14 0.98 0.97

15 1.05 1.03

16 1.13 1.10

17 1.20 1.17

18 1.27 1.24

19 1.34 1.31

20 1.41 1.38

 

 

transcript from previous post

 

AndyP

Member posted 24-04-2001 08:04

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My previous post was a pack of lies. The import boost gauge is calibrated in 100mmHg. However, +7 or 700mmHg does equate to ~13.5 psi, or as near as dammit 1 bar.

The oil pressure gauge is calibrated in kG/cm2. 1 kG/cm2 = 14.2psi

 

 

Dan Frith

Member posted 24-04-2001 22:42

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Is that true ?? 7mmHg equates to 13 psi ??

Mine is a jap import with these units on the turbo guage, please say it is not lying to me and I will be Mr Happy in a happy pie shop

Dan

 

 

AndyP

Member posted 24-04-2001 23:46

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According to my calculations it's true, but the gauge isn't very accurate.

 

AndrewG

Member posted 25-04-2001 08:47

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You can a useful MS Windows "Unit Converter" for free from http://www.dac-systems.com/unitconv.htm

-Andrew

 

 

 

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UK 92 TT White

Mongoose K&N AVCR

KYB Eibach

14.5psi = 1bar

 

If you had a chip upgrade the safe reccomended max is something around 12.5/13.5psi.

 

A lot of people go above the maximum boost beacuse with day to day driving you can't notice any problems - in the short term. I don't know what safe maximum I'd reccomend without a chip... perhaps 12 tops... GET A CHIP!

 

If you start to edge over 15psi the injectors wont be able to deliver enough fuel without an injector upgrade (even using the chip).

 

When you up the psi you must listen for any detonation, that's the engine killer if you ignore it all the time.

 

I don't see the point of a fuel cut defenser on a 300zx, on a supra it's mandatory for anything other than a minor boost upgrade.

 

The point of most upgrade chips is to tell your car how much fuel it needs with the increased boost, then to optimise all the other configurable items such as the cam timing, ignition timing... The jwt and clones also slightly overfuel to keep the cylinders cooler.

http://www.jimwolftechnology.com/ecu.htm

 

BTW. I'd reccomend getting the timing checked. It should be 15deg for a 300 running normally. If it's over you can cause detonation, under and you'll loose lots of power!

 

Have fun...

 

[This message has been edited by Jez (edited 14-07-2001).]

Try this site: http://www.speckdesign.com/Tpressure.html

 

Basically, 1 bar= 14.5psi

 

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