How to go from a single turbo set-up to sequential twins?
01-21-11, 08:19 AM
#1
How to go from a single turbo set-up to sequential twins?
I really don’t know how serious I am, but I'm thinking about going from my current single (GT3574) set-up to sequential BNR’s. I really miss the fun of the stock sequential system on the street and think the BNRs are a great option for fast spool and good power (close to, or over 400 rwhp).
What parts do I need take to go from a proper single-turbo set-up back to the sequential system (besides the BNRs obviously)? I don’t care about emissions, just the vacuum lines and solenoids that are necessary to get the sequential system up and running again.
What parts do I need take to go from a proper single-turbo set-up back to the sequential system (besides the BNRs obviously)? I don’t care about emissions, just the vacuum lines and solenoids that are necessary to get the sequential system up and running again.
01-21-11, 08:33 AM
#2
search simplified sequential. you may want to look into a custom set of solenoids or a brand new set of OEM ones.
you will need at minimum:
charge control
charge relief
turbo control vacuum
turbo control pressure
you'll need to have wiring for this. if you cut up your harness that will be a problem. you'll need a form of boost control for the precontrol and wastegate actuators. you'll need to modify your intercooler piping and you'll need a new downpipe and exhaust modifications.
you will need to remove the blockoff plate for the rear turbo oil drain, and you'll have to make sure you have the oil and coolant lines
you will need at minimum:
charge control
charge relief
turbo control vacuum
turbo control pressure
you'll need to have wiring for this. if you cut up your harness that will be a problem. you'll need a form of boost control for the precontrol and wastegate actuators. you'll need to modify your intercooler piping and you'll need a new downpipe and exhaust modifications.
you will need to remove the blockoff plate for the rear turbo oil drain, and you'll have to make sure you have the oil and coolant lines
01-21-11, 08:48 AM
#4
Ronald..
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This may be a first on this forum but I totally see where your coming from. Ive been down the big single rout before so theres a very good reason my current FD is staying twins this time.
01-21-11, 09:38 AM
#6
Thanks for the reply's.
Thanks arghx, I'll search for simplified sequential and see what I come up with.
I've thought about that too. I've never driven in an RX6 FD, so I really have no reference for how it feels. New BNRs are pretty cheap (all things considered), and a used RX6 is hard to find and the kit is usually pricey.
This is my second FD and I bought it with the conversion. My previous FD had the twins then I went single on that one too. I'm sure I can bring the car to my local mechanic with a set of BNRs (JPR) and he can get it all sorted, but I am curious exactly what is needed as I will likely do the work myself.
search simplified sequential. you may want to look into a custom set of solenoids or a brand new set of OEM ones.
you will need at minimum:
charge control
charge relief
turbo control vacuum
turbo control pressure
you'll need to have wiring for this. if you cut up your harness that will be a problem. you'll need a form of boost control for the precontrol and wastegate actuators. you'll need to modify your intercooler piping and you'll need a new downpipe and exhaust modifications.
you will need to remove the blockoff plate for the rear turbo oil drain, and you'll have to make sure you have the oil and coolant lines
you will need at minimum:
charge control
charge relief
turbo control vacuum
turbo control pressure
you'll need to have wiring for this. if you cut up your harness that will be a problem. you'll need a form of boost control for the precontrol and wastegate actuators. you'll need to modify your intercooler piping and you'll need a new downpipe and exhaust modifications.
you will need to remove the blockoff plate for the rear turbo oil drain, and you'll have to make sure you have the oil and coolant lines
This is my second FD and I bought it with the conversion. My previous FD had the twins then I went single on that one too. I'm sure I can bring the car to my local mechanic with a set of BNRs (JPR) and he can get it all sorted, but I am curious exactly what is needed as I will likely do the work myself.
01-21-11, 10:21 AM
#7
F'n Newbie...
iTrader: (6)
Depending on how soon you're planning on doing this...
I have a pair of used (but pretty good condition) BNR's, and the old solenoid system that Rob Bailey (Saxyman) was putting out before he disappeared.
I'll be selling both of them when I return from Afghanistan this summer.
I have a pair of used (but pretty good condition) BNR's, and the old solenoid system that Rob Bailey (Saxyman) was putting out before he disappeared.
I'll be selling both of them when I return from Afghanistan this summer.
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01-22-11, 12:13 PM
#10
RX-7 Bad Ass
iTrader: (55)
Good thing is most of the parts you'd need to go back to twins can be had quite cheaply. And, I'm sure you can easily sell your single turbo setup and come out money ahead.
One option if you're feeling enterprising is to buy a JDM long block off Ebay for around $1800 or so. Get all the turbo bits you need and then sell off the rest - you can easily make money on that deal, and get some other nice stuff for your car like a low-mileage tranny.
Basically, to just get the twins on, you'd need the turbos, manifold, oil and water lines, rear intake pipe, y-pipe, intake, and intercooler piping to go to your IC setup. You'd also need the stock BOV's unless you can re-use your current BOV. If you're going sequential, you'll need the sequential solenoids and make sure you can plug it all in to your harness, if the engine harness has been hacked up and the extra plugs removed you'd need a new harness.
It's a big job for sure. But, there's nothing like the response of stock twins
. Love mine!
Dale
One option if you're feeling enterprising is to buy a JDM long block off Ebay for around $1800 or so. Get all the turbo bits you need and then sell off the rest - you can easily make money on that deal, and get some other nice stuff for your car like a low-mileage tranny.
Basically, to just get the twins on, you'd need the turbos, manifold, oil and water lines, rear intake pipe, y-pipe, intake, and intercooler piping to go to your IC setup. You'd also need the stock BOV's unless you can re-use your current BOV. If you're going sequential, you'll need the sequential solenoids and make sure you can plug it all in to your harness, if the engine harness has been hacked up and the extra plugs removed you'd need a new harness.
It's a big job for sure. But, there's nothing like the response of stock twins
. Love mine!Dale
01-22-11, 01:25 PM
#11
. Ive been reading a few more threads on simplified sequential and this is certainly not looking like a simple job. I like the idea of buying a longblock for all the bits I may need and selling the rest.Im not sure if my harness has all the conectors in place or not, when it warms up a bit outside I'll check. I know there is one or two open connectors, but I don't think they are all there. A new harness is probably a deal breaker for this idea, thats a little more work that I wanted to deal with. Maybe I'll let that decide whether to go forward on this or not.
01-22-11, 02:11 PM
#12
Original Gangster/Rotary!
iTrader: (213)
Matt, keep in mind a lot of these JDM longblocks come with blown turbos, just to name one of the frequent problems with them.
Also, if you plan to road race the car in the future, twins aren't really the best option--- from the standpoint of longevity, reliability, and heat management.
If I were you I'd recommend a smaller single for the quick spool, along with lots of other little things to help response and keep the heat to a minimum. PM me, I'd be happy to chat w ya over the phone more about it
Also, if you plan to road race the car in the future, twins aren't really the best option--- from the standpoint of longevity, reliability, and heat management.
If I were you I'd recommend a smaller single for the quick spool, along with lots of other little things to help response and keep the heat to a minimum. PM me, I'd be happy to chat w ya over the phone more about it
01-23-11, 08:57 AM
#14
Matt, keep in mind a lot of these JDM longblocks come with blown turbos, just to name one of the frequent problems with them.
Also, if you plan to road race the car in the future, twins aren't really the best option--- from the standpoint of longevity, reliability, and heat management.
If I were you I'd recommend a smaller single for the quick spool, along with lots of other little things to help response and keep the heat to a minimum. PM me, I'd be happy to chat w ya over the phone more about it
Also, if you plan to road race the car in the future, twins aren't really the best option--- from the standpoint of longevity, reliability, and heat management.
If I were you I'd recommend a smaller single for the quick spool, along with lots of other little things to help response and keep the heat to a minimum. PM me, I'd be happy to chat w ya over the phone more about it
01-23-11, 11:31 AM
#17
Khris
01-23-11, 02:14 PM
#18
thanks for answering I was thinking that this may be a case of this 'may be good for you but not for me' kinda thing. yeah 4300 for 16 psi is quite a high threshold. My high boost is 15 psi and I see it by 3500. I think the easiest route is just to change the turbo as someone else suggested.
01-26-11, 05:46 PM
#19
wow, that sounds very laggy. I think it would be much easier for you to just swap turbos. My 35r with the 1.06 t4 housing makes 10psi at 2800rpm. Also, Sean has said the BB version of your turbo spools as fast as a 35r, maybe you could just buy the chra?
01-26-11, 09:42 PM
#21
This may seem like a dumb question to some of you but, is there a single turbo option that would equal or slightly exceed stock performance through the RPM range, i.e good low end and large enough to provide stock or slightly more than stock boost at the upper end? I just thought that maybe because of turbo technology improvements over the last 10-15 years something like that might exist. I know everybody is looking for more power than stock but is there a turbo that would still make 10-11 psi at the top end while spooling as fast as the stock primary. A good simple single for stock like performance. I realize that answer is probably no.
01-26-11, 10:19 PM
#22
this may seem like a dumb question to some of you but, is there a single turbo option that would equal or slightly exceed stock performance through the rpm range, i.e good low end and large enough to provide stock or slightly more than stock boost at the upper end? I just thought that maybe because of turbo technology improvements over the last 10-15 years something like that might exist. I know everybody is looking for more power than stock but is there a turbo that would still make 10-11 psi at the top end while spooling as fast as the stock primary. A good simple single for stock like performance. I realize that answer is probably no.
01-26-11, 10:29 PM
#23
To the OP....
I would reconsider going back to twins. If you are single & you're not liking the "lag", then I would consider revising your setup. There are many things that can be done to make it all gravy & avoid the horrid mess that is the sequential system.
You can see my relative setup & numbers from my signature. I will tell you brother, I DO NOT have any complaints about lag. The thing spools almost as quick as the twins. In fact, it's barely noticeable. Builds boost FAST & hard. My car is solely a street machine and it does it VERY well. I am also using a MBC so I could likely gain a few 100 rpm spool time with a quality EBC.
The key is turbo size and spec, engine port, & intercooler setup. All of my parts match very well & I did it specifically to build a fast spooling street car without the heat & reliability issues of the twins.
Simple, smart, fun
I would reconsider going back to twins. If you are single & you're not liking the "lag", then I would consider revising your setup. There are many things that can be done to make it all gravy & avoid the horrid mess that is the sequential system.
You can see my relative setup & numbers from my signature. I will tell you brother, I DO NOT have any complaints about lag. The thing spools almost as quick as the twins. In fact, it's barely noticeable. Builds boost FAST & hard. My car is solely a street machine and it does it VERY well. I am also using a MBC so I could likely gain a few 100 rpm spool time with a quality EBC.
The key is turbo size and spec, engine port, & intercooler setup. All of my parts match very well & I did it specifically to build a fast spooling street car without the heat & reliability issues of the twins.
Simple, smart, fun
01-27-11, 08:02 PM
#25
This may seem like a dumb question to some of you but, is there a single turbo option that would equal or slightly exceed stock performance through the RPM range, i.e good low end and large enough to provide stock or slightly more than stock boost at the upper end? I just thought that maybe because of turbo technology improvements over the last 10-15 years something like that might exist. I know everybody is looking for more power than stock but is there a turbo that would still make 10-11 psi at the top end while spooling as fast as the stock primary. A good simple single for stock like performance. I realize that answer is probably no.
I bet the OP has an engine compression issue, I recently dynoed a stock port FD and had 22psi by 3400rpms!( 4th gear).
P trim 1.15 T4 GT35R
