what AN fitting thread pitch do i need to replace the stock turbo oil feed banjo fitting?

 

been a long time, so I am probably wrong
isnt the banjo fitting on top the water line?
and the oil line on bottom just a pipe that goes into the block held on buy two nuts and a gasket?

 

I also believe this is correct.

 

oh, wait there is an oil pipe on top, if that is what you mean
14-280

 

http://www.summitracing.com/parts/EAR-9919BFHERL/

This is probably what you are looking for. 14mmx1.5

 

I am int he middle of my single conversion and I made the oil feed! I am using a -4AN line so I had to get a bushing which is (1/4 x 1/8) and it fits right in the old banjo hole! lol. (the 1/4 is on the block side)

 

yes the front iron galley is a 14mmX1.5 banjo.

 

i'll be running a twin TD05 setup on my car...Brent Dalton made a comment to me that i should put a restrictor in that oil feed line so that it slows down the flow to better lube the turbos, apparently the higher oil pressure from rotary engines tends to blow the oil seals

my question is, will running a -4 AN line out of the block and then split into 2x -4 AN lines serve as a restrictor to slow down the oil pressure?

 

it's best to start with more oil than is needed and then clamp down on the restrictor sizes as needed.

i prefer a carb jet in line in the fitting to the turbo itself, even a smaller -4 line is going to be too much for most aftermarket turbos. OEM turbos usually have internal restrictors but i haven't paid much attention to how the original HT15's were setup.

 

which carb jet are you using?

for my situation, would you recommend using 2 carb jets? or just on before the split?

how do you know when its too much or too little flow? by gauging how much oil is getting into the intake tract? i have an oil catch can, will that change how i gauge how much oil is too much oil?

sorry lots of questions man, but i really want to make sure i do this right lol

 

usually i'll start with an edelbrock 389 main jet and go lower as needed, iirc 240 is as small as you can get and sometimes what i wind up running depending on the turbo.

seeing as you will be running 2 off the same feed line then i would definitely start with the larger jet sizes. it will be a little more difficult with twins to know if one turbo is having oiling issues over the other, the exhaust carbon seal is usually where you will get oil pushed past which turns up as blue smoke. a little blue smoke after a pull is nothing to really worry about but if you are getting smoke during mid range and high RPM pulls during boost then you need to restrict the flow.

 

On the subject of restrictors.

It is usually better to have a huge drain, and unrestricted flow, the blown seals happens from oil backing up in the chra due to a drain that cannot flow enough.

 

i wouldn't say huge is necessary but yes it is very important to have the flow constantly downhill from the turbos and additional room in the line for the oil to not back up at all. that said with a twin setup i would use both drain locations instead of having them join and drain at the front housing.

i normally use -10 line for the single setups.

 

where do i get the oil drain adapter? the one that goes into the block...i need one for the front and the back oil drains

 

most of the ones i built the engine was a apart which was a good time to tap the front cover for an AN adapter so i omit any adapter plates. on some others i used the original lines and welded new steel to them to get the angles right, on others welded an AN bung to the stock steel lines, there's many ways of doing it but all SS line w/AN fittings obviously looks the cleanest. but tapping the front cover for a -10AN to 1/2" NPT gives it a little more breathing room.

i believe they are very similar in size to a garrett T3 oil inlet feed but i can't answer this question for you.

 

If you are going to use adapters, this is what you need.

http://www.atpturbo.com/mm5/merchant...Category_Code=

 

hey Karack,

could you give me a link to the carb jet i need to buy?

i've been searching "edelbrock 389 carb jet" but a whole bunch of random stuff comes up

thanks