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Turbo oil drain to front cover

Old 05-04-09, 11:56 PM
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Turbo oil drain to front cover

i am doing the oil drain for my turbo i have used a -12 to the oil pan in the past but this time i want to use a -10 to the front cover on my 93 rx7 does anyone have pictures oftheir current set up and info like 1/2 or 3/4 tapped to the front cover and so on? pics with info will really help as there is no threads that covers this
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Old 05-05-09, 10:23 AM
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the 2 bolt flanges for the oil drain on garrett turbos will also fit the stock return flange on the block. I think they cost like $11 or something from atp.
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Old 05-05-09, 10:28 AM
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For T4 garretts? I had to cut mine down to fit the FD cover. It fits the S5 FC cover perfect though.
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Old 05-05-09, 12:22 PM
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pics guys
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Old 05-05-09, 01:22 PM
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I don't have any pics of my current drain that are any good. They wouldn't help you anyways, like I said I had to grind down a T4 drain flange to fit........

The S5 front cover will accept the T4 drain flange just fine though.

Also, if I were to do it again on an FD front cover, I'd use some of the stock piece + a silicone drain hose. The adaptor flange I'm using is in the way of one of the bolts for the front cover.....

http://www.atpturbo.com/Merchant2/me...egory_Code=FLA

Thats one of many they sell. You can buy whatever type of end you're going to use, slip on, flare, bare female threads.....
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Old 05-05-09, 03:33 PM
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Old 05-05-09, 06:10 PM
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anyone with a rew engine?
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Old 05-05-09, 06:14 PM
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that is a 13b-rew, running a gt35r in a 93 fd
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Old 05-05-09, 08:01 PM
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oh lol i didnt notic cuz the original flange the studs dont line up perfectly.
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Old 05-05-09, 11:54 PM
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13BREW running a GT35R on a short run manifold. -10 oil drain line.
Bottom of the page:
http://www.reganrotaryracing.com/fdturboimprove.htm
HTH,
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Old 05-06-09, 12:03 AM
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Journal or BB turbo? -10 is too small for a journal bearing turbo.
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Old 05-06-09, 12:12 AM
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Originally Posted by 1Revvin7 View Post
Journal or BB turbo? -10 is too small for a journal bearing turbo.
BB...in my case.

But I'm curious why is a -10 too small? The drain line is simply a gravity feed unpressured hose to the oil pan for all intents and purposes. One could back calculate the flow into the turbo bearing must equal the flow out. Figure the feed line is typically as small as a -4 at up to..what... ~120psi max oil pressure. I think a -10 at 0psi should be more more than capable of handling the flow. Help me understand.
TIA,
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Old 04-11-16, 02:43 AM
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Originally Posted by CrispyRX7 View Post
BB...in my case.

But I'm curious why is a -10 too small? The drain line is simply a gravity feed unpressured hose to the oil pan for all intents and purposes. One could back calculate the flow into the turbo bearing must equal the flow out. Figure the feed line is typically as small as a -4 at up to..what... ~120psi max oil pressure. I think a -10 at 0psi should be more more than capable of handling the flow. Help me understand.
TIA,
Crispy
this was never answered, if anyone can chime in; i'm still a lil confused as to was fittings exactly i need for the return (drain) line. i would greatly appreciate it a lot since i'm currently building my own oil lines.

thank you
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Old 04-11-16, 08:55 AM
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Originally Posted by FD7KiD View Post
this was never answered, if anyone can chime in; i'm still a lil confused as to was fittings exactly i need for the return (drain) line. i would greatly appreciate it a lot since i'm currently building my own oil lines.

thank you
Depending on your manifold/turbo, it might be almost impossible to fit a -12 an on the OEM REW front cover turbo oil drain, even a -10an could be complicated.
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Old 04-11-16, 03:29 PM
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On a short low rise manifold, -12 is possible....although I'd hate to do it with the MOP operative. Size of -12 and nothing much in the way of hose for flex, if you have fittings both ends, makes it critical on angles - so expect a lot of trial and error tack welding male fittings in place. With a high rise, should be a breeze in comparison.

Doubt anyone will give the "reason", it's normally through experience of what doesn't work, that the recommendations evolve. Useful guidelines for drains -

Ray Hall Turbocharging - Turbocharger Facts and Myths
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Old 04-11-16, 04:26 PM
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the thing is the size plays less of a roll if every other thing is checked...
like no loops in the drain line.. all gravity down hill from the turbo to the front cover.

this is why i make solid drains and skip the braided stuff. this is something i will continue to do as i built turbo kits for other cars/customers.
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Old 04-18-16, 07:33 AM
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Originally Posted by CrispyRX7 View Post
BB...in my case.

But I'm curious why is a -10 too small? The drain line is simply a gravity feed unpressured hose to the oil pan for all intents and purposes. One could back calculate the flow into the turbo bearing must equal the flow out. Figure the feed line is typically as small as a -4 at up to..what... ~120psi max oil pressure. I think a -10 at 0psi should be more more than capable of handling the flow. Help me understand.
TIA,
Crispy
There is a fair bit of gas that bleeds into the core going with it, takes a big load off you crankcase venting on the block of you can run a separator on the turbo drain but not a lot of room in most rotary engine bays unless you are running an oil scavenge.
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