I am putting together a turbo kit. I read some posts in here that say its a good idea to run an oil restrictor and that it will make ur turbo last longer. I was just wondering if it would be getting enough oil w/ one on there? thanks

 

Typically they say....

Non BB Turbos:
-3AN feed=don't really need one
-4AN feed=you should use one

BB Turbos need less oil than the above turbos. Basically look at what most have done and make an educated guess. Sometimes it works with no restrictor no matter the feed line. It's basically you're own call after you research what others have done.

 

thanks. How about u, u running one?

 

A restrictor wont hurt anything and they are cheap. I would use one unless the turbo your getting has one built in.

platinum

 

run a -3 line and be done with it.

 

my ball-bearing sc34 came with one..

 

email some1 abt this very same question to use on my DBB GT35R and this was the response:

You have to determine if you even need a restrictor. Generally, the
restrictor is required if your engine runs very high oil pressures (e.g.
above 75 psi) and or idles high (over 45 psi). If this is the case, the
excess oil pressure can leak past the seals under certain operating
conditions.

You must know your oil pressures before and after adding the restrictor to
ensure you get enough oil to the turbo.

If you're unsure, don't do a restrictor. Worse case scenario is if you run
without one, find out you have an oil leak, you can always add one and the
problem goes away. No harm done. Most likely, you'll run without one and
never notice an issue.

 

^^ Well-stated.

 

I need an oil restrictor for my setup, where can I pick one up from. Also, what size is the restrictor hole typically?

 

good thread... my 67 BB came with a restrictor already on the turbo, but many people have been telling me to run another restrictor from the back of the block... anyone know where i can find a solid answer on this? sorry to jack thread... it probably would have come up anyway...

 

After a lot of debating with myself, I felt as though I should use one. I run a -4AN feed line and have pressures that get up to around 80-85psi during WOT.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AF-P Dunc &raquo;</TD></TR><TR><TD CLASS="quote">After a lot of debating with myself, I felt as though I should use one. I run a -4AN feed line and have pressures that get up to around 80-85psi during WOT. </TD></TR></TABLE>
as am i. actually around 90 psi. i think im just going to go with a -3AN line. that should solve any restriction needs.

 

my GT35r has somethin that looks like a restrictor... im not sure if it is or not.. its brand new... do they come with them?

i have a -3an i believe and im seeing 75psi at WOT... 15 at idle...

 

thanks bigbadboy for the reply.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by inline4me &raquo;</TD></TR><TR><TD CLASS="quote">I need an oil restrictor for my setup, where can I pick one up from. Also, what size is the restrictor hole typically?</TD></TR></TABLE>

For the mid-framed turbos like the GT28RS up to the GT35R, you would use a .035" Restrictor. For the larger framed turbos it would be about .065"..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheShodan &raquo;</TD></TR><TR><TD CLASS="quote">

For the mid-framed turbos like the GT28RS up to the GT35R, you would use a .035" Restrictor. For the larger framed turbos it would be about .065"..</TD></TR></TABLE>

Thanks, this should fix my problem.

 

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