Looking for anyone with a good experience with the Borg Warner efr 7670 1.05AR twinscroll turbo. I’ve just had built a 2.5 engine that will more than take the power before the naysayers appear. My question is, what power should I be expecting?

272/268 cams
+1mm exhaust valve supertech
+1mm intake valve supertech
Heavy duty single valve springs and retainers
tgv deletes
cosworth inlet
perrin front mount
all custom induction pipe work
custom manifold, up pipe, down pipe
2x 38mm external wastegates

 

contact banny sti he used one of them

https://www.scoobynet.com/members-ga...n-a-scoob.html

 

Cheers mate, I remember reading it when he built it. Will give him a shout

 

i wonder that turbo too and sx e series turbos, what kind of header will you use? complete custom?

if it's not secret would you give some information about it ?

 

I decided to use RCM headers and just make an up pipe with t4 flange to suit the position of the efr, I mean how hard could it be at the end of the day ? Turns out it was a nightmare. The 7670 external wastegated version is a physically massive turbo but it’s now welded up and in position. I’ve just to weld the wastegates on the headers for front bumper exit but overall I’m happy with it considering I done it myself.