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Old 01-12-2006, 04:20 PM   #1
Weakness
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Question STi Gauge installs

I am ready to by my gauges (Defi D-Gauge Series) and had a couple questions:

I'm going boost, oil pressure and oil temp ... how are you guys putting in your oil senders and such:

eGauges has them come with the following:
  • Oil pressure gauges includes sender, wire and 1/8PT to 1/8 NPT adapter.
  • Oil temp gauge includes 1/8 NPT sender and wire.
  • Boost gauge comes with includes tubing and T fitting.

I did a search in here and only boost gauges have any info. Anything else you think I need? Thanks!
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Last edited by Weakness; 01-12-2006 at 04:20 PM. Reason: Change title
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Old 01-12-2006, 04:29 PM   #2
supersport
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I would suggest an EGT in place of either the oil pressure or temperature. Both of the oil gauges you talk about are doing basically the same thing.

Boost gauge is simple to install. T off of the hose going to the BOV. Caution Defi's are known to read a couple pounds high.

Oil gauges - you can tap the galley plug on top of the motor under the intercooler or get an oil filter sandwich adapter. search for them then choose what you like the best.

EGT - tap a whole in the manifold, there is a flat casting mark that works really well. Search and you will find many write-ups on these installs.

keep searching you will find them!
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Old 01-12-2006, 04:35 PM   #3
Weakness
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Quote:
Originally Posted by supersport
I would suggest an EGT in place of either the oil pressure or temperature. Both of the oil gauges you talk about are doing basically the same thing.
Do I really need EGT if I plan to stay within a conservative side of tuning? I don't see myself going with different turbo setup or stand-alone mgmt. Is it still necessary for a 2.5L with stock internals?

I would think watching oil temp and then oil pressure are good things since you know the temp you are running and then the actual pressure of the oil flow.
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Old 01-12-2006, 10:06 PM   #4
STi_Fan
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I was going to due this to my STi, until I got the price installed for everything was over a grand.
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Old 01-12-2006, 10:15 PM   #5
2TG8V
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For Defi boost gauge,I followed Defi instructions and tapped a T fitting between manifold pressure and fuel pressure regulator
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Old 01-12-2006, 10:19 PM   #6
g0tb00st
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i would get an EGT over oil gauges any day.
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Old 01-12-2006, 11:32 PM   #7
bigmike25rs
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Good luck getting Defi D-gauges. They are discontinued. I've been trying to find a D-series boost gauge for awhile. Rallysportdirect had 10 left last month, but I was too late. Let me know if you find a vendor that still has them.
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Old 01-12-2006, 11:43 PM   #8
EROCK
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+1 for EGT replacing one of the oil gauges (I have EGT, Boost and Oil Press.)
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Old 01-13-2006, 12:34 AM   #9
2TG8V
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Egt,oil temp and boost over here
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Old 01-13-2006, 05:19 PM   #10
Weakness
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Quote:
Originally Posted by bigmike25rs
Good luck getting Defi D-gauges. They are discontinued. I've been trying to find a D-series boost gauge for awhile. Rallysportdirect had 10 left last month, but I was too late. Let me know if you find a vendor that still has them.
Looks like eGauges.COM has them. I just put my order in. BTW, for STi's you need an Oil Galley plug for oil pressure or oil temp gauges. I bought them from SUBARUGENUINEPARTS.COM for $7.50 each
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Old 01-13-2006, 05:46 PM   #11
supersport
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Quote:
Originally Posted by Weakness
Do I really need EGT if I plan to stay within a conservative side of tuning? I don't see myself going with different turbo setup or stand-alone mgmt. Is it still necessary for a 2.5L with stock internals?

I would think watching oil temp and then oil pressure are good things since you know the temp you are running and then the actual pressure of the oil flow.
You can usually tell the oil temp from the pressure, the hotter it gets the lower the pressure gets at idle. There is some controversy about which is better (temp or pressure) but you don't need both. I would rather have different gauges telling me different things about how the car is running than two that are giving similar information especially if I can only use 3. If I had 20 gauges I would have oil pressure and temp. You can tell a lot from the EGT readings.
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