Alright, so i purchased a tiny t3 .42/.48 turbo from a member here on HT.


I'm positive that i need to plug this, but what would be the best way to do that? Besides from that, what is its actual purpose?


Here are the pics.







Thanks.

 

looks like it goes to the wastegate from the looks of it...

 

its a vacuum source for the internal gate that came on that turbo origionally.

you can either get a rubber vacuum cap from the parts store or get a plug for it. its probably 1/8" NPT but might be 1/4" NPT hard to tell from the pics and hardware stores or parts store usually have them.

 

Alright. Thanks for the quick replies!

I was pretty sure thats what it was, but i would rather know for sure.

 

thats your boost reference. use it for your wastegate actuation.

 

'You're missing a nice chunk from the compressor housing

Yeah thats the wastegate pressure reference port.

 

I plugged mine with a 1/8" NPT plug, then used a vacuum source off the manifold for the WG. Boost ends up being 1/2 pis greater, and is now steady regardless of weather or heatsoak.

 

dont use that. unscrew and get an 1/8" npt plug from the hardware store and thread it in. Get your boost source for the wastegate from the intake manifold.

 

Ya i already have my tial wastegate hooked to my vacuum manifold.

thanks everyone.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">dont use that. unscrew and get an 1/8" npt plug from the hardware store and thread it in. Get your boost source for the wastegate from the intake manifold.</TD></TR></TABLE>

wow, first person Ive ever heard do that...
85% of turbos have the boost source for the wastegate right on the housing...
I use the pipe right off the turbo for the wastegate...

 

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

wow, first person Ive ever heard do that...
85% of turbos have the boost source for the wastegate right on the housing...
I use the pipe right off the turbo for the wastegate...</TD></TR></TABLE>
ya, factory turbos tend to use that for a boost source. it doesn't work well once you start changing ****. In the aftermarket world, flip your 85% and you're close. even if a turbo does have that port i wont use it. especially with low tech boost control. I do have limited experience, but I have setup a few boost control systems and my experience says get it from the IM and save time diagnosing problems later.

 

i'm runing a external deltagate wastegate that has 2 ports on it. the one that says boost goes to the nipple on the comp housing.

should i cange it to the IM?

thank

 

it doesnt matter really but depending on how shitty your intercooler is you might see 1-2 psi difference from what your wastegate spring is set at to what your actually seeing in the manifold due to pressure drop.