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yes, readings from the HEAD, which get plenty of oil. Originally posted by wavrdr:
On a side note, I'm running an electric gauge tapped to the driver's side head....perfect fit, and readings in the 40-50 psi at WOT.
Ryan
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There is definatly no room for an electric sender down there. When I first installed I used one of those nylon kits and some high temp vaccum hose to cover that and they both broke. Then I went and spent $60 on some stainless steel braided hose. I thought I had everything good but about 2 months later it started leacking from one of the adapters. So I just yanked it out of there.
Fast Cheap reliable
Pick two
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Originally posted by RTStabler51:
yes, readings from the HEAD, which get plenty of oil. Originally posted by wavrdr:
On a side note, I'm running an electric gauge tapped to the driver's side head....perfect fit, and readings in the 40-50 psi at WOT.
Ah Hah! I got ya.....DUH????    
2002 ZO6...462whp/410wtq
pretty darn fast!11.70 @ 122
silver/black
2006 Trailblazer SS(wifes car)
silver/black
2000 SVT-Turbo-sold
silver/blue #1699/2150
13.83 @ 102.82 on 5psi
13.51 @ 107.56 on 8psi
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The head is fine to tap for the oil feed for the turbo, as the turbo doesn't require a huge amount of oil pressure to oil the bearings.
I am not taking oil from the main gallery, not after understanding how IMPORTANT it is for the rod bearings to get evewry drop of oil possible! I am using it fro the pressure reading only.
As for your oil pressure readings from the head, you will find that they will be lower than the true pressure in the bottom end. This is OK I guess, as you could see a potential drop in pressure which would alert you of trouble, but you are only getting "half of the story" so to speak.....
Also if you intend to use the same head tap for reading oil pressure and for feeding the turbo, you pressure readings will drop again and be even less accurate as you are effectively bleeding off pressure to the turbo now. Understand what I am saying?
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!
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Originally posted by RTStabler51:
yes, readings from the HEAD, which get plenty of oil. Originally posted by wavrdr:
On a side note, I'm running an electric gauge tapped to the driver's side head....perfect fit, and readings in the 40-50 psi at WOT.
[Mechanical Engineer]
Yes the heads do get plenty of oil, but the simple fact that there is a restrictor in the oil feed from the block TO the head, which through simple fluid dynamics, tells you the pressure is lower on the head side of the orifice.
[/Mechanical Engineer]  
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!
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my understand from the 2 years of reading these types of posts though, is that the oil pressure in the heads my NOT drop though compared to the bottom dropping. If I understand what you are saying that if the head pressure drops low, then the main galley should be a bit higher, so, if this is true, then why have people in the past said that tappin into the head is bad? I would think that tappin into the side of the head would be like setting your clock ahead 15 minuts. NAGH MEEN? Originally posted by Stazi the Aussie:
Originally posted by RTStabler51:
yes, readings from the HEAD, which get plenty of oil. Originally posted by wavrdr:
On a side note, I'm running an electric gauge tapped to the driver's side head....perfect fit, and readings in the 40-50 psi at WOT.
[Mechanical Engineer]
Yes the heads do get plenty of oil, but the simple fact that there is a restrictor in the oil feed from the block TO the head, which through simple fluid dynamics, tells you the pressure is lower on the head side of the orifice.
[/Mechanical Engineer]
Ryan
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Incorrect.
The oil feed to the engine is a SYSTEM. So if you loose the bottom end, oil pressure drops everywhere.
Like I have been saying. It's fine to tap the head for a pressure signal, but it's not the true pressure reading for the bottom end (where our historical problems exist) so you don't see the true main and rod bearing pressures.
Depending on how the oil feed is split from the pump, a drop in the bottom end may not be as noticeble when measuring from up top as it is from down below.
All I am trying to say is that you want to watch the oil pressure where the problems occur, not from the other end of the engine........
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!
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Ryan
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Very intresting...Answered quite a few of my questions...Thx!
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I have an electric oil pressure that has been patiently waiting its install Do you fellas have pics of where you're tapping into the head for the sending units? I'm pretty darn sure I know where you're talking about, but I want to be 100% sure.  Also, I know it's not 100% accurate, but like Stazi said, it will show a pressure drop, and that's all I'm trying to monitor. Actually, while we're on the topic, I have an oil temp gauge waiting, too. Could I "T" off the hole in the head and get oil temp? If not, where's a better place to get oil temp? Thanks for the help!
Derek
Scion xB 5-spd
Previous: 2000 Silver Frost SVT
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