A stock VR4 turbo is a TD04 9b. Its a tiny little thing, It could be good for 220 whp, but thats approaching its limits, if not a little past.Originally Posted by admin
I put down around 400-ish WHP on race gas with 2 of them @ 18 psi (which is arguably peak efficiency for them) But that was not on the dyno, simply a guestimate based on my traps vs weight.
I have a few lying around my garage if anyone wants one.. LOL