DwArF

Im using an S4 turbo on my 12a. Im going with the Billet Machined One Piece Oil Pedestal from respeed (With a 1/8" NPT hole on the side closest to the intake) for my oil supply line.

Are there any advantages of tapping the front cover and using that for the oil return line verse tapping the oil pan for an oil return line?

Kim

Sure there is.
You wont have to unbolt the return line if you need to pull the oilpan.

Do notice that if You tap the oilpan that You do it above the oil level or you'll be fucked.

yetterben

Everyone here pretty much who has put turbos on there 12'a includeing me is gonna tell yah to drop the pan and drill the front cover. Thats where mazda put it thats where we put it. Problem with oil pan is its damn hard to get it above oil level and just damn to honda to put it there. DO it right do it once!

darkfrost

iTrader: (1)

Also the front cover is thicker than the oil pan, and chances of leaking are a lot less.

DwArF

You make it sound like I can tap it w/o removing the front cover and by only removing the oil pan...?

The motor is already out of the car. The only reason I wanted to tap the oil pan instead of the front cover is becuase of pulling the front cover and the damage assosciated with the thrust bearings in there?

So can I do it without pulling the front cover off and just remove the oil pan?

yetterben

you can just remove the oil pan Wtf. why wouldnt you be able to remove just the oil pan????? thats the way i did it. i have seen people do it with the oil pna still on and just flush the syst em with lots of oil!

DwArF

I dont want metal flakes in my engine?

yetterben

ah f**k it do it how you want. i told yah drop the pan and drill the hole take a rag and wipe out the excess jesus!


https://www.rx7club.com/1st-generation-specific-1979-1985-18/start-well-something-awesome-707542/

DwArF

Yours looks nice and shiny. Do you have any close ups?

What did you use to tap it? What size is it?

yetterben

7/16 drill bit 3/8 npt tap for my setup get your fitting adn decide line size before you do anything!

DwArF

The line size is the line between my supply point and the turbo return? How do I determinte what size I want?

Kim

Turbo return should be as large as possible and have as few bends as possible.

yetterben

use -8n 10 was way to big and a hassle

Dan_s_young

iTrader: (1)

-10an return line here, modified GSL-SE front cover.

MattG

iTrader: (2)

I plan on taking mine to a local machine shop, and having them tap it for me, get them to use the old return tube and make it threaded, and using the stock set up pretty much.

I will see if they can do that, and how much it will run me. If not I will just make my own.

I got enough to worry about with the wiring, I can leave the tapping up to someone else.

steve84GS TII

Front cover is the only way to go.......I dont think its even possible to drain to the oilpan and have it be above the oil level.No need for paying a machine shop,the tap can be had at almost any hardware store for less than 20 bucks.


Also,be sure that the passage you use on the pedestal is plumbed to the clean side of the oil filter(the center hole). No point in feeding dirty oil into those tiny little turbo bearings.

bad 83

iTrader: (3)

Once you pull the pan, you can catch any debri from getting into the engine. I don't believe it is possible to gut the hole in the pan high enough for the oil to drain properly.

82transam

iTrader: (18)

Sit the engine on the flywheel when removing the front cover, that will prevent any problems with the torrington bearings. And yes, put the drain on the front cover, it is very easy to do!

MattG

iTrader: (2)

Steve is that just hose, with clamps on it?

Its hard to tell from the picture.

Thats how I want to set mine up, just keep the stock flange and everything.

DwArF

What size tap are you guys using? I dont know if I need -10an or -8an?

djessence

man you should read your own thread lol. direct freak has -10an and yetter has -10, bad 83 has -8. so it would seem up to you.

yetterben

I have a 10 bad83 has a 8 when useing the stock turbo i should have used 8. Casue i didnt want to reclock the turbo, it was a pain to use 10 in my situation. But do what yah want dont listen to the people who have done it!

DwArF

but yetterben said -10an is too big and to use -8 and Kim said to use the biggest possible, while dan_s_young has a -10.

MattG

iTrader: (2)

But look ay the size turbo Dan is running compared to the others.

DwArF

lol word