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Thread: good b18 turbo question.

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    Default good b18 turbo question.

    okay all you honkies, can some of you guys tell me how you ran you oil and coolant lines from you motor to your turbo. some pics would be nice, and also i have a foctory ctr oil cooloer on my b18a block, but i dont know which pipe is coolant in and which is cooland out.

    help anyone.


    thanks

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    you run the oil from the pressure sender (usually just above or below the oil filter or around there somewhere) by installing a t-fitting before the sender and screwing the sender back into that. then you run the line from there to the turbo oil in line, and i ran the oil straight back to the oil pan, not sure how you'd go about piping it to the oil cooler.

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    the proper way to run the oil lines is to tap off the back of the block with a bsp-to npt fitting (honda blocks are British style pipe thread, all the other fittings out there are national style) its above the oil filter. Then run a short oil line to the firewall, and mount the Tee there, run a line to your turbo, and use the other opening for your stock oil pressure sender (you can get a fitting for here too since the oil pressure sender is BSP thread, but most guys don't, they just thread it in there real good) by the way, the fitting size is 1/8th.

    for drain just drill a hole in your oil pan and get a bung brazed to it, make sure the hole is above the normal oil level in the pan, and below the output of the turbo, also make sure there aint no kinks in that line.

    for coolant lines, most people just T off of the TB coolant lines, but I don't like the idea of heating up the incoming air, so I don't run water cooler lines. just make sure you block off the holes in the turbo with brass plugs if your gona do the same.

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    Originally posted by vegas2005baby
    the proper way to run the oil lines is to tap off the back of the block with a bsp-to npt fitting (honda blocks are British style pipe thread, all the other fittings out there are national style)
    This sounds like some honda-tech bandwagoneering here at beyond.ca

    NPT fittings work just fine.


    Here is how I ran my oil return. Not sure if that helps at all.

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    NPT + liquid pipe sealer.
    I ran the coolant from the factory cooler, to the turbo and back to the block also. It doesnt matter which is in or out, flow direction is not important for the coolant half of the turbo cooling.
    Main thing for oil return line is that it must be above the oil pan (no part of the bend should be below oil level) or a scavenging system will be needed to pump it into the pan.

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    great thanks guys,

    primer drift i was wondering if you could send me a pic of your oiling line from the back of the engine to your turbo because the first pic is great. also where can i buy those npt fittings for a decent proce. i am a poor ass student so i need them cheep.

    thanks boys

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    Originally posted by white rice
    great thanks guys,

    primer drift i was wondering if you could send me a pic of your oiling line from the back of the engine to your turbo because the first pic is great. also where can i buy those npt fittings for a decent proce. i am a poor ass student so i need them cheep.

    thanks boys
    i got my fittings through mopac, but they weren't cheap. one fitting was $26, it cost more then my braided line
    sig deleted by moderator, because they are useless

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    Sorry I can't engine isnt at home, but perhaps Legendboy who posted his pic, has one of his oil sending line. Its really simple, take your standard honda oil pressure sensor to home depot, and match it up with an npt pipe fitting. I used a pipe T and a collar insert to plug into the pressure sensor hole, the sensor went on the bottom of the T, and a -standard (referred to dash standard; -8AN, -10AN, etc.. not sure what size I used) stainless line with npt adapter to run oil to my turbo. Bring your npt T fitting to mopac (or similar performance shop) and have them match it up with earls fittings and braided steel -standard line.
    Last edited by Primer_Drift; 11-23-2004 at 12:38 PM.

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    cool thanks

    one last quicky what diameter did you run into the turbo ad what diameter out ot the turbo.

    how r u programming your fuel?

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    I think its -10AN return line (must be as big as possible, not smaller than output hole on bottom of the turbo), and -3AN sending line with 2 fittings (1/8" NPT x -3AN).
    I used AEM (poorly) and am now rebuilding, a lot of ppl on here have hondata or uberdata.

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    This is what you need to oil your turbo off the top of my head:

    Aeroquip/Earls fittings:

    Oil Feed
    4 x 1/8NPT to -3AN (or -4AN)
    1 x 1/8NPT Tee
    1 x 24" -3AN Braided line (or -4AN)
    1 x 32" -3AN Braided line (or -4AN)

    Oil Return 1 (Expensive > $100) - pictured above
    1 x 12" -12AN Braided line
    1 x -10AN Bulkhead fitting
    1 x Bulkhead nut with teflon washers
    1 x 45degree -10AN swivel fitting
    2 x -12AN Compression fitting
    1 x -10AN to 5/8NPT
    1 x T3 oil drain flange with gasket.

    Oil Return 2 (Cheap < $50)
    1 x Steel -10AN weldable barbed fitting - Generic brand
    1 x 5/8NPT to -10AN Brass barbed fitting - Generic brand
    1 x 12" -12AN Braided line
    1 x T3 oil drain flange and gasket.
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    To touch on coolant lines.

    Most custom turbo setups don't have collant lines setup properly. Guys think that if they tap coolant at the heater hoses or from the throttle body that its working. In all fact this isn't a very good way to do it. I had the coolant setup on my car tapped into the upper and lower rad hoses with an external electric water pump cycling the coolant thru the radiator. That is the proper way.
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    ^^ Just a side note to coolant lines, this is a longevity thing, coolant actually boils inside the turbo and continues to circulate through the rad due to convection. I spoke with Alamo turbo, and turbonetics and they informed me the coolant lines were not neccesary for turbo cooling while the car was running, but would increase the life of the mid section (impeller shaft, bearings etc) due to the tendency for oil to cake up inside after a hot shutdown.

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    Coolant lines or turbo timer. One or the other.
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    hey since we are on the topic, i still havnt thought of how i am going to run my intake piping. the intake side of the turbo is on the drivers side and i will be runnign a intercooler. so how should i or how did you guys run the piping. and what type of piping should i use. i have access to tig tig so welding is not an issue.

    thanks so far for all your help i never knew these forums would be so helpful but the only bad thing is that they take away from my time to wirte my paleo paper. lol

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    oh ya the cheep awy to run the oil lines, can i buy this crap at home depot or do i have to go to a performance shop?

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    Performance shop for the braided line and fittings. Just brass npt fittings u can get at home depot, I've never seen -standard stuff there at all.
    Worry about piping when you have your turbo in, and clearences are easily visable. In other words its the last thing you fabricate.
    I have a fmic so my pipes went underneath and around the front frame memeber to the IC infront of the rad support.

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    wow they went under the frame rail you dont scrap on them holy crap.

    i built the manifold and the thing is bolted onto the car and everything. i was just asking so i know how much money to save and which parts to buy.

    do you have any pics of how you did yours.

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    Here are some more pictures from that day, should give you an idea about charge pipes.














    ps. it would be a big mistake to cheap out on your oil lines.
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    White rice I think you misunderstood me, they look like legendboy's above. I'll post some pics later.. working with mandrel bends is difficult at first but once you get the radius' worked out its pretty simple.

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