What for it is necessary? It is absolutely unnecessary thing for a turbo manifold. The basic stream of gases should go without resistance on turbo, instead of on a gate! )))There's only one stupid thing about that setup... The wastegate ports. Why does everyone insist on short cutting this piping?
Proper wastegate ports should Y smoothly from the manifold runners. Mine is done poorly, and so are just about everyone else's. I haven't seen a boostlogic manifold yet, but I wonder if they overlooked this as well.
Any time a fluid has to make 90° turns, bad things happen. Does anyone know why this is overlooked so often?
This, I run a 60mm wastegate because it is easier for my exhaust to flow through the turbo then the wastegate. I had a tial 44 and I had problems keeping the boost down.Ideally, the wastegate port should be going along with the direction of exhaust flow; however, it can be easily compensated with a much larger wastegate, if not, two large wastegates
As long as you have two nicely sized wastegates, it will compensate for just about any weird direction changes or lengthly wastegate inlet pipe. On our 2JZ's, it's not a big concern until you reach really high RPM's and really large turbos (9000+ RPM and big power). If the turbo is conservatively sized, with a smaller A/R for better spool up (e.g. T4 0.82 A/R), it will defintely reduce any chance for boost creep or uncontrollable spikes.
I really like the manifold, and in fact, I recently built myself a similar looking manifold...lol Lots of runner length, but mine has a few special tweaks to it. Mine was purposely done NOT to be equal length to compensate for a few known trouble cylinders on the 2JZ-GTE.
This manifold is nice... Any good pics of the merge collector?
You about merge dump-pipes to down-pipe?Any good pics of the merge collector?
No no, I mean the merge where all 6 runner meet to the turbine flange.. I know it's twin scroll, so it would be dual 3-into-1 collectors. There is one pic of the T4 flange, but it's kinda dark and can't see much of the inside...You about merge dump-pipes to down-pipe?