EFR turbos

[Gripless]

Some of this is word of mouth others is personal experience. 
 

the good 

EFR turbos spool very fast and make boost low down.  The 7163 is close to a stock 48/49 twin scroll turbo but just keep going to 40psi. 
They make good power and efficient so top mount is a viable option to 450whp.

Bigger frame B2 make huge power and still have impressive spool.

there are some hybrid Gama-Ti without the small inlet as options but they are not as good as the efr with cover swap.

the bad

The limited inlet side is a real problem. You need an anti surge cover SX or they choke. They are an OEM or OEM replacement turbo so while they can put out big boost in shipped form they must have the built in recirculating valve or they choke even faster. Don’t fit a blanking plate and run external BOV. 
they can’t sustain 15 degrees angle even though that’s the spec. Even 10 degrees can leak.

the ugly

You can’t rebuild them as there are no parts.
Parts are back ordered as far back as 2019. Apparently this was as they started to move production to China in 2019 and got caught up in the pandemic so lost a lot of production time.

Even now 5 years later some parts are up to 18 months back order.
They like to leak oil. This is due to the lack of counter rotating grooves to push oil back. But that are also sensitive to pressure either in oil feed or crank case. Once they have leaked they seem to leak forever. Make sure you put a OPR like turbosmart inline with them from the first start.

There are quite a few secondhand units floating around that leak but you can’t tell until they are running. They won’t have shaft play and can look clean, or have been cleaned.

 

 

prices have almost doubled since release so the reviews for the price point no longer stand. Factoring in $700 for a new cover they are big money.

 

Edited February 26 by Gripless