Since ROR is always taking about huge amounts of boost and quick spooling with a VNT, what would you gain with the compound setup that a VNT and a huge intercooler would not give you?
QuoteSince ROR is always taking about huge amounts of boost and quick spooling with a VNT, what would you gain with the compound setup that a VNT and a huge intercooler would not give you?Pretty much it will eventually run out of flow for higher rpm and be outside of its map. You would be hard pressed to find a vgt that could do a better job than a well designed compound set up. I have ridden in a lot of well built trucks and the turbo set ups make you want to cry. The only thing to compare it too is being on a roller coaster because you are being pulled forward so hard. I dont know a lot of roller coasters that go 120mph though. I am very interested in the topic of compounds for my build. But everything has to be budget minded and affordable cuz Im frugal . I also am curious as to how a eaton m45 or larger would work with a stock hx35. My buddy Carl is an innovator for truck performance and was one of the first people to ever do a triple turbo setup and is now running superchargers with large large turbos. I'd like to see how this would work on the vw's. I might enlist him for help.http://www.youtube.com/watch?v=BAZduIY1aeA&feature=relatedhttp://www.youtube.com/watch?v=9rgs326Ve6Q&feature=autoplay&list=ULOkn7MTZ0OWA&lf=mfu_in_order&playnext=1
No doubt the small hp turbo can still be a restriction but the lp turbo compresses the air before it goes into the small turbo which then conpresses it more the small turbo can then flow more cause the air is compressed going in already they work off of pressure differential not a certain amount of air.The Porsche set up is called a sequential setup it's not really the same at all toyota and Mazda has used the sequential setup before regardless I think a waste gate is definitely required unless u use a vent that has a huge turbine housing but that'd kind of defeat the whole point Ror if u measure the inducer and exducer on that t3 like u did on the t4 then divide the inducer by the exducer and then square that number and multiply by 100 you'll have the trim of the turbo and u can easily find the map unless it's 55 trim they never published that one I think a 60 trim t3 could be a good lp turbo
U can still get an idea of where the 55 trim will work since its some where between a 50 and 60 trim. Ive actually been working on making a some what accurate compressor map for by combining a 50 and 60 but it's just been during my lunch hour at work. I'll post it when I'm done and satisfied. One of the bigger vnt turbos they use over at tdi Club has the same inducer and exducer size I think it's the 2260 I would imagine the geometry of it is newer and more efficient tho. 55 looks like a good turbo for a vw diesel depending on the exhaust a.r what size of engine is it off of?
So, does anybody have anything to say about setting up a K24 and a K26 in a compound array?i have one of each.. a K24 off a 1.6/2.0TD, and a K26 off an Audi quattro 10v.. (wastegateless)i was told to run them as compounds, with the K26 not running a wastegate at all..i can make the K24 fit fairly decent, and still have room for the K26..what do you guys think? kinda would like to know sometime soon.. ive got a boostless diesel that needs new turbos..
Quote from: R.O.R-2.0 on February 09, 2012, 11:16:59 amSo, does anybody have anything to say about setting up a K24 and a K26 in a compound array?i have one of each.. a K24 off a 1.6/2.0TD, and a K26 off an Audi quattro 10v.. (wastegateless)i was told to run them as compounds, with the K26 not running a wastegate at all..i can make the K24 fit fairly decent, and still have room for the K26..what do you guys think? kinda would like to know sometime soon.. ive got a boostless diesel that needs new turbos..k24 i think would be a good smaller turbo, only thing some what bad about it is it has a pretty small exhaust side a/r of .30k26 i think will be alright, i'd try something bigger personally. it only flows enough air for maybe a bit more than 200hp and its efficiency range of 70+% isn't that wide and peak efficiency is only 72%. its worth a try especially since u have it all laying around.