Hey everyone! i'm new here to the forums.
i've come to learn from you all and your setups.
seems i'm not the only one who's come to learn about the compound turbo setups you all do. i'd hate to hear the sighs in aggravation from you all knowing "Gah! another one... *sigh*:thud:".
but i must ask if anyone who has images of their setup in mid to high detail to post them here for me. i have a pretty good idea of how the setup works. my goal isn't to create the most insane power levels ever, but more along the lines of having a decent high rpm power while having a gutsy low end aswell.
my setup is being done on a Toyota 3SGTE 2.0L turbo engine that is stroked to 2.2L marketed *2.139L actual*. my power goal is only about 400-450hp with a gutsy low end. i was going to be using a set of Garrett turbos, a GT2554R as the primary and a GT3076R as the secondary pre-compressor. now out of a running rpm range of 1,000-9,000rpm, the GT2554R would be giving it's power from it's spool point upto about 4,500rpm while the bigger GT3076R would start through in it's pre-compressed power into the GT25. i know the exhaust side can handle it just fine as long as the primary is wastegated to a safe point and have the gated gas redirected back into the secondary turbo. but what i don't understand is how it is safe for the pre-compressed air to be thrown into the smaller primary turbo like that?
the concept i'm getting in my head is that the small primary wouldn't be able to tell the difference between the ambient atmospheric pressure and pre-compressed atmosphere because it's based off of a pressure ratio both before and after the compressor it's self thus the concept of a compound being able to work without any problems?
also, how do you estimate a given boost with both turbos giving boost at the same time? i'm pretty sure you can't just add the two resulting pressures togethere, there would be a gap based off each turbo's efficiency combined right?
right, well sorry for the long read. but i'm fascinated with the compound turbo concept and for my build it would be perfect.
i've come to learn from you all and your setups.
seems i'm not the only one who's come to learn about the compound turbo setups you all do. i'd hate to hear the sighs in aggravation from you all knowing "Gah! another one... *sigh*:thud:".
but i must ask if anyone who has images of their setup in mid to high detail to post them here for me. i have a pretty good idea of how the setup works. my goal isn't to create the most insane power levels ever, but more along the lines of having a decent high rpm power while having a gutsy low end aswell.
my setup is being done on a Toyota 3SGTE 2.0L turbo engine that is stroked to 2.2L marketed *2.139L actual*. my power goal is only about 400-450hp with a gutsy low end. i was going to be using a set of Garrett turbos, a GT2554R as the primary and a GT3076R as the secondary pre-compressor. now out of a running rpm range of 1,000-9,000rpm, the GT2554R would be giving it's power from it's spool point upto about 4,500rpm while the bigger GT3076R would start through in it's pre-compressed power into the GT25. i know the exhaust side can handle it just fine as long as the primary is wastegated to a safe point and have the gated gas redirected back into the secondary turbo. but what i don't understand is how it is safe for the pre-compressed air to be thrown into the smaller primary turbo like that?
the concept i'm getting in my head is that the small primary wouldn't be able to tell the difference between the ambient atmospheric pressure and pre-compressed atmosphere because it's based off of a pressure ratio both before and after the compressor it's self thus the concept of a compound being able to work without any problems?
also, how do you estimate a given boost with both turbos giving boost at the same time? i'm pretty sure you can't just add the two resulting pressures togethere, there would be a gap based off each turbo's efficiency combined right?
right, well sorry for the long read. but i'm fascinated with the compound turbo concept and for my build it would be perfect.
. last time i took a test drive with him. i drifted it on the icy/snowy roads and was able to keep it sideways all the way down a mile long straight as if i was just cruising the road... LOVE IT! 
