I'm turboing my 12a and I have a few questions about oil line sizes, more specifically the fittings at the end.


My turbo is a ht18s-bm. So far I have tapped my front cover with a 1/4"npt. That is going to be for my oil return.

The oil pedestal I got from Re-Speed has 3 holes in it. Two 1/8npt tapped holes for gauges, and 1 blank drilled hole that can be tapped for 1/8npt or drilled larger and taped for 1/4npt.


So I'm basically asking if anyone knows the adapter sizes that I need or where I can find a manual for my turbo.

Is this a part I will be able to buy online or is going to be custom made?

Thanks for your help, and pictures of anything are available on request.

 

most of the stuff for a turbo 12a needs to be made. the feed line should be about a 4-an size im pretty sure is what most people use, and the return should be about a 10-an size.. your 1/4" oil return is way way too small. your question about the turbo though i have not a clue about.

 

dp

 

Looks like I'm going to re-drill and tap the front cover for 3/8npt and use an -8an adpater


I've seen this page for the adapters and it looks like you can make a lot fit. I just don't want to restrict flow.

Then it will be drilling and tapping my pedestal 1/4npt and use a 1/4npt to -4an for the feed line. Does that sound correct?

http://www.jegs.com/i/Russell/799/660430/10002/-1

 

sounds good to me, but why not go with 10an for return? some people even go to 12an..

 

check out www.anplumbing.com

they're probably the cheapest place out there to buy AN lines and fittings, unless you use the cheap Chinese crap.

 

I've heard of people saying 10 and 12 are a little big, especially for the little turbo I'm running

 

I'm running -8 on my T4OB..... you should be fine.