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Old 05-07-2003, 04:56 PM   #1
makofoto
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Default Bar to PSI conversion factor?

My Greddy Turbo gauge is in BAR ... what is the conversion factor to PSI?

Should I get a PSI gauge ... is it easier to get more precise reading with one?

Right now I'm getting a good 1.1 bar with my EcuTek re-flash =
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Old 05-07-2003, 05:00 PM   #2
zaxrex
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1 Bar = 14.5 PSI
1 PSI = 0.06895 Bar
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Old 05-07-2003, 05:01 PM   #3
sonicsuby03
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14.7 PSI = 1 BAR.. YOUR CRANKING OUT JUST OVER 16 PSI. DEPENDING ON YOUR MODS I WOULDN'T RECOMMEND RAISING BOOST ANY HIGHER.
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Old 05-07-2003, 05:12 PM   #4
Thumper23
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Old 05-07-2003, 05:14 PM   #5
makofoto
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"I WOULDN'T RECOMMEND RAISING BOOST ANY HIGHER." Because .... ?

With my EcuTek re-map ... not getting any knock ... even with 91 octane (I usually use 94+ octane)

What is the limit on the EJ20 engine ... and why?

Not planning to ... just wondering? And looking for an excuse to get a larger TMIC

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Old 05-07-2003, 05:16 PM   #6
Thumper23
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The stock turbo starts to lose efficiency around 17 psi, I think. The big thing with turning up boost is obviously engine management, but that's already taken care of. You still have your stock uppipe in?
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Old 05-07-2003, 05:27 PM   #7
makofoto
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APS up-pipe ... Stromung down-pipe back exhaust system

OK ... turbo inefficiency ... got it ...
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Old 05-08-2003, 02:12 AM   #8
HndaTch627
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Quote:
Originally posted by zaxrex
1 Bar = 14.5 PSI
1 PSI = 0.06895 Bar
this man is correct, bar is commonly mistaken for 14.7psi it is 14.5(repeating)

jeremy
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Old 05-08-2003, 10:05 AM   #9
wrxtuner02
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Quote:
Originally posted by makofoto
"I WOULDN'T RECOMMEND RAISING BOOST ANY HIGHER." Because .... ?

With my EcuTek re-map ... not getting any knock ... even with 91 octane (I usually use 94+ octane)

What is the limit on the EJ20 engine ... and why?

Not planning to ... just wondering? And looking for an excuse to get a larger TMIC

i run 20 psi on my STG 4 car daily. no knock, no prrblems
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Old 05-09-2003, 01:59 AM   #10
clamdip
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i have a question. on my OEM boost gauge and peak boost (bar) on my blitz turbo timer, i'm reading about 1.42 bar, however, my boost controller (HKS EVC IV), i have it set to 1 bar max and have a safety boost cut (which in times of over boosting, it defaults back to the stock boost) set to 1.15 bar, which hasn't happened yet. i'm guessing that i'm getting vacuum reading from different locations. my boost controller is hooked up directly from the stepping motor to the turbo. in other words, all vacuum lines are going straight to the turbo, except one to the blow-off valve. either my boost controller is contributing to some bad boost spike, or my boost controller is reading the correct vacuum and the OEM gauge and turbo timer is off. any suggestions as to what i should do. i've turned the boost down to about 10 psi at the moment because i know for a fact that the stock turbo isn't very efficient after 16psi, and i'm trying to prolong my turbo as long as i can. or maybe i should blow it and upgrade. hmmmmm . well, any opinions, flames or suggestions are welcome, thanks guys.
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Old 05-09-2003, 02:57 AM   #11
HndaTch627
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Quote:
Originally posted by clamdip
i have a question. on my OEM boost gauge and peak boost (bar) on my blitz turbo timer, i'm reading about 1.42 bar, however, my boost controller (HKS EVC IV), i have it set to 1 bar max and have a safety boost cut (which in times of over boosting, it defaults back to the stock boost) set to 1.15 bar, which hasn't happened yet. i'm guessing that i'm getting vacuum reading from different locations. my boost controller is hooked up directly from the stepping motor to the turbo. in other words, all vacuum lines are going straight to the turbo, except one to the blow-off valve. either my boost controller is contributing to some bad boost spike, or my boost controller is reading the correct vacuum and the OEM gauge and turbo timer is off. any suggestions as to what i should do. i've turned the boost down to about 10 psi at the moment because i know for a fact that the stock turbo isn't very efficient after 16psi, and i'm trying to prolong my turbo as long as i can. or maybe i should blow it and upgrade. hmmmmm . well, any opinions, flames or suggestions are welcome, thanks guys.
get the stock intercooler out of there and you'd be amazed how much less pressure lose there is.

jeremy
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Old 05-09-2003, 03:06 AM   #12
makofoto
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How does adding a larger IC, which has more volume then the stock IC, create less lose of pressure ... ?
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Old 05-09-2003, 04:06 AM   #13
clamdip
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thanks for the info guys, but i don't think it deals with pressure loss, i could be wrong though. i think it may have something to do with the vacuum readings. i'm just wondering which should i trust in terms of accurate readings, my boost controller or the OEM gauge? to put it simple, my boost gauges (both on turbo timer and OEM mech. gauge) read about 1.42 bar, where as my boost controller is set to only 1 bar max, with a 1.15 bar boost limit. got a bit of a problem here.
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Old 05-09-2003, 04:41 AM   #14
HndaTch627
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Quote:
Originally posted by makofoto
How does adding a larger IC, which has more volume then the stock IC, create less lose of pressure ... ?
because the stock core loses approx 3 psi where as a larger higher flowing core may have only a 1.20 psi pressure drop
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Old 05-09-2003, 01:14 PM   #15
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