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Old 02-04-2004, 11:04 PM   #1
datwrx
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Default Need help with gauge readings

My egt gauge goes up and down. It's stays at 4 after I warm it up and then it goes up when I gas it. It's goes up to 7.
My oil pressure goes up when i gas it too. Are those gauges sappose to do that. What is a good reading from the egt and oil pressure gauge.
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Old 02-05-2004, 12:45 PM   #2
datwrx
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The gauges are defi gauges. If that helps anything.
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Old 02-05-2004, 12:52 PM   #3
awdman
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Default Yes.

You should be OK. Most people say their EGT temps are 800-900 degrees F. It sounds like you are speaking Celsius.
Oil pressure at startup is 100p.s.i Then after warmup at idle should be around 40p.s.i. On the road and warmed up, it should read 80-90 p.s.i.
The readings on both will climb as revs increase and decrease as revs fall. You will be producing more heat in the exhaust and more pressure from the oil pump.
Remember that the EGT may not change readings as quickly as oil pressure as you have to wait for it to heat and cool. Pressure will always change faster than temperature.
Also the quality of gauge can affect readings. Electrical vs. Mechanical and so on.
Just do a conversion on the temps from C to F and see what you got.Just remember you do not want to see the equivilent of 1600 degrees F. BAD things happen at tose temps!
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Old 02-05-2004, 01:24 PM   #4
datwrx
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The oil pressure is normally at 2.0 kp then it goes to 6.0 kp when I step the on the gas. It's looks like that should happen when you gas it. It's like when you gas it then the egt temp goes up. I just want to know if it was working correctly. I read something on the forum and it got me all confused.
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Old 02-05-2004, 01:25 PM   #5
datwrx
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I wanted to know what is a bad reading. I mean like what is a bad egt temp or a bad oil pressure temp.
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Old 02-05-2004, 04:22 PM   #6
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Your oil pressure readings should be ~100 PSI upon initial start-up (as awdman said). The pressure readings will eventually drop as the engine gets warm. What you will end up with is ~70-80 PSI @ cruising speeds (sometimes higher if your pushing it), & ~20-30 PSI @ idle. I would say anything below 20 PSI would be cause for concern (definitely anything lower than 15).

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Old 02-05-2004, 08:26 PM   #7
datwrx
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Mine reads in 2.0 kpa. What is that. Trying to covert it to psi. Then it raises to 6.0 kpa when I step on the gas. Don't know much about gauges. Just trying to make sure my gauges are good or not. Unless I did something wrong.
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Old 02-05-2004, 08:28 PM   #8
datwrx
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My egt temp is in celsius. It idles at 4 and it get to 7 or 8 when I gas it. Awdman did say atleast that sounds correct.
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Old 02-05-2004, 09:17 PM   #9
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Everything you have seen to this point is normal. You can start to worry if your EGT readings go above 800 C for prolonged periods. This isn't terribly likely unless you have a manual boost controller and get a lot of part throttle full boost (which raises EGTs) or you're using engine management and have a poor tune.

Joel
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Old 02-05-2004, 09:24 PM   #10
AJ711
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Your answers can be found here!
TADA!

Just go to the temperature section and convert between C->F and the pressure section and convert between Kilopascals -> psf and you'll get your answers.

As for whether you're in your nominal range or not, search, it's what the buttons are for.

AJ

PS: This'll work for your boost gauge as well
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Old 02-05-2004, 09:27 PM   #11
Zola
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Also, look closely at the face of your gauge. In all likelihood, your pressure measurements are x100 kPa.

2.0 kPa is only about 0.3 psi, whereas 200 kPa is 29 psi.
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Old 02-05-2004, 09:33 PM   #12
datwrx
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Ya it is kpa x100. I have done some searching and most of it doesn't have answers I'm looking for. Must be searching wrong or something. Thanks for all the help. Sounds like the gauge is correct then.
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Old 02-05-2004, 10:27 PM   #13
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Here's a nifty conversion tool you can download (only 152k). It's will convert just about any measurement: http://www.joshmadison.com/software/convert/dl.asp

- Kean
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Old 02-06-2004, 01:45 AM   #14
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Thanks alot guys. You guys been alot of help.
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Old 02-19-2004, 06:07 AM   #15
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can the egt gauge tell if the car is lean or rich? i think i read somewhere that if it is high temp then it is lean?
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Old 02-19-2004, 01:17 PM   #16
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Default Yep.

Most people here associate high EGTs with a lean condition. The fuel gets cut back and up the temps go.
Rich conditions not so much...So watch your gauges!
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