need help choosing a set up
11-17-09, 10:44 AM
#1
need help choosing a set up
basically i'm looking to have a RELIABLE 400-415 whp but i want to have as little difference in turbo lag compared to stock as possible...i have asked similar questions but everytime i get told to do a search...so i've been searching and this is what i've come up with
reliability is my main concern because i will be driving the car a whole lot
btw my car will be running a mild street port, v-mount intercooler, apexi pfc, full 3 inch exhaust, and the fuel system is still up in the air depending on what i end up deciding to do with the turbo system
i want to do this thread because i've talked to alot of the younger rx7 guys and we have all done the research and read all over the forums, but we all want to hear from the guys that have actual experience running their set up on the streets for long periods of time, not drag racing or drifting or anything, for street use...
i have searched and searched and found these setups now i need your expertises and guidance on what would be best to make a reliable street car that can make the vettes bend over on the streets
1) Non-sequential stock twins
i've heard from many people and also my threads that you can make a good 375hp on them at around 14 psi or so...but my question is how is the reliability once you take the twins to that psi? i'm guessing its not that great
2)T04E 60 trim
I searched this turbo set up and what i see more often than not is that the spool time is very close to stock, but it tends to run out of breathe...
3) gt35r
i think this would be my last choice because from what i've heard most guys say it start positive boost around 3200-3600k depending on their mods
4) twin gt25s or gt28s
this is the one i really like but i'm not sure how it'll work. i read up on howard colemans threads, he was using twin T04Es making around 500 hp...thats too much for me...i want to downsize the turbos to gt28s or even gt25s on a turbo per rotor manifold...i think this would be a very reliable system because it could flow alot more are with alot less lag and less stress than on a single turbo...i know that this could be a bit more pricey but if its not too much more pricey i'd rather do this just for the sake of reliability, and its pretty cool lol...but then again i could be completely wrong too lol
...this is my question in short...from the set ups i have written above...which would have the best reliability/quick spool ratio at about 400-415hp of the 4 set ups written above?
reliability is my main concern because i will be driving the car a whole lot
btw my car will be running a mild street port, v-mount intercooler, apexi pfc, full 3 inch exhaust, and the fuel system is still up in the air depending on what i end up deciding to do with the turbo system
i want to do this thread because i've talked to alot of the younger rx7 guys and we have all done the research and read all over the forums, but we all want to hear from the guys that have actual experience running their set up on the streets for long periods of time, not drag racing or drifting or anything, for street use...
i have searched and searched and found these setups now i need your expertises and guidance on what would be best to make a reliable street car that can make the vettes bend over on the streets
1) Non-sequential stock twins
i've heard from many people and also my threads that you can make a good 375hp on them at around 14 psi or so...but my question is how is the reliability once you take the twins to that psi? i'm guessing its not that great
2)T04E 60 trim
I searched this turbo set up and what i see more often than not is that the spool time is very close to stock, but it tends to run out of breathe...
3) gt35r
i think this would be my last choice because from what i've heard most guys say it start positive boost around 3200-3600k depending on their mods
4) twin gt25s or gt28s
this is the one i really like but i'm not sure how it'll work. i read up on howard colemans threads, he was using twin T04Es making around 500 hp...thats too much for me...i want to downsize the turbos to gt28s or even gt25s on a turbo per rotor manifold...i think this would be a very reliable system because it could flow alot more are with alot less lag and less stress than on a single turbo...i know that this could be a bit more pricey but if its not too much more pricey i'd rather do this just for the sake of reliability, and its pretty cool lol...but then again i could be completely wrong too lol
...this is my question in short...from the set ups i have written above...which would have the best reliability/quick spool ratio at about 400-415hp of the 4 set ups written above?
11-17-09, 10:51 AM
#2
Stick with just one turbo. A BB To4E 57/60 trim is very close to the stock twins and tends to have a little bit more up top in my experience. Getting to 415rwhp will take 20psi and a well tuned setup. It will be a lot easier on the GT35R and you will be in the 32-3600rpm range as mentioned as long as you have a tubular manifold..
11-18-09, 02:40 AM
#4
ye i was thinking about the t04e but i still really like the idea of the twins cus the volume of air that those turbos will flow is much greater than a t04e, so in principle its like flowing as much air as say a gt35 or a gt40, with half the spool time...
plus that goes back to reliability too because it will produce a t04e like boost lag, while dealing with the strain that a 35r or gt40 will deal with at that same flow level
and also...what specs would you guys recommend on the T04E? and also how are peoples reliability feedback on this turbo?
plus that goes back to reliability too because it will produce a t04e like boost lag, while dealing with the strain that a 35r or gt40 will deal with at that same flow level
and also...what specs would you guys recommend on the T04E? and also how are peoples reliability feedback on this turbo?
11-18-09, 09:59 AM
#5
Unless you can fabricate your self I wouldn't suggest trying to tackle twins.
As for the To4E the most I have gotten out of one was 30K~ish miles, no real problems. Garrett turbos last a long time as long as the oil is kept clean and egts aren't sky high...
For the specs I would do a T4 1.0 divided P trim, with a water cooled chra and a 360thrust bearing upgrade. Mate that to the 60 trim compressor wheel..
As for the To4E the most I have gotten out of one was 30K~ish miles, no real problems. Garrett turbos last a long time as long as the oil is kept clean and egts aren't sky high...
For the specs I would do a T4 1.0 divided P trim, with a water cooled chra and a 360thrust bearing upgrade. Mate that to the 60 trim compressor wheel..
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