Just to clarify you're talking about compound turbos, where the turbos are in series correct? Twin turbos would be two of the same turbo generally each feeding half of a given motor.
Are thinking of something like this?
How would a K26 audi turbo play with a VNT?like, VNT for the small turbo, and K26 for the big one..im going twin boost now that i know i have a 12mm block..
I saw your posts in the conversion section at tdiclub. Your truck looks sweet. I'm currently building a 1989 toyota for a buddy with a compound turbo setup. K03 and a k24. We're waiting for the oil line adapters, couplers and lines to get the mock up done. We should be dropping the motor in right after Christmas. We're going for a respectable 26 psi. This truck will have all the electronics with some custom chips from Malone. Should work out really well.
Quote from: R.O.R-2.0 on December 20, 2011, 12:40:52 pmHow would a K26 audi turbo play with a VNT?like, VNT for the small turbo, and K26 for the big one..im going twin boost now that i know i have a 12mm block..I'm sure something like this would also work really well. We were actually thinking of doing something like this with the k24 for the big one and a gt1749va for the vnt but the deal fell through for the vnt. I would be a little concerned about boost creep with a small vnt but a wastegate to bypass the small turbo would easily take care of this. The powerstroke 6.4 litre engines had a vnt for the small turbo and a wastegated big turbo so it is definitely doable.
also a k26 could be good depends on how much it can flow. i would think on a compound setup u'd want a large turbo thats good for atleast 300hp like a t3 60 trim or something
I don't know enough About it to say what turbos will work best together buying know k24 would make a better small turbo than big. And the sizing of both is really important the small turbo can still be a restriction