RX7 Twin turbo
 

Anyone ever try putting an RX7 twin setup on a civic. My friend is upgrading to a single on his so he's going to sell me his setup really cheap, if I wanted it. Would this be a Bitch to hook up? I'm thinking I could use his stock downpipe too. SAFC and DSM's for fuel. What do you think?

Re:RX7 Twin turbo
 

uhh... no.

i have seen a tt setup with a honda before' but.. ugh the fabrication.. the hours... ugh.. just go single turbo.. why would you want to go twin turbo. have you done anything to your engine?? i dont see the advantages of going twin turbo and running 7psi cus thats all your stock engine can hold unless tuned.

my .02

go single turbo save the $$ and the >:(

Re:RX7 Twin turbo
 

well i agree about the tt being a waste other than the coolness factor...but stock hondas can take more than 7 psi...what do you mean by tuned? dyno tuned?

Re:RX7 Twin turbo
 

blah- i figured i was being too general'

you know... VAFC Hack- DSM injectors- FMU - all that other jibberish'

i agree they can handle more boost then 7psi... again, just being general'

Re:RX7 Twin turbo
 

well its not going to hold any boost for very long without one of the things you mentioned....off topic i know...back to the tt thing...give it a shot if its really cheap and you dont mind it possibly not working well

Re:RX7 Twin turbo
 

Like I said I would use 450's and a SAFC to tune. Besides the hours of fab work, are there any other problems? It wont cost more because I'm getting it from a friend. It's a sequential setup, so I would have minimal lag with a bunch of power especially on a Honda. Oh, and the cool factor.

Re:RX7 Twin turbo
 

well i dont know how well it would work...is this a d or b series....i dont know ---- about how big those turbos are

Re:RX7 Twin turbo
 

Either on a D15B7 or a D16Z6, I have access to both. The turbos are about the size of a T25, maybe a little bigger.

Re:RX7 Twin turbo
 

gotta remember there are two...does the whole assembly physically fit in there?

Re:RX7 Twin turbo
 

I'm fairly sure it will fit, Without AC I have crazy room in my engine bay, I can stand in there.

Re:RX7 Twin turbo
 

a SEQUENTIAL twin setup would kick ass on a d16z6. It would be massively cool.

It probably wouldn't be that bad... i think it has valves, you'd have to figure out the workings of it. It's kind of a complex switching system, and I'm not sure if it happens automatically. Look into it a little. It will be very cool if you make it work~!!!!

Re:RX7 Twin turbo
 

As a person with a twin turbo honda I wouldn't reccomend it. To get everything to fit you are going to have to do some major cutting and welding. also your going to have more lag than if youd run a single turbo. They are sequential so that'll help a the lag a little bit, but than you have a complicated vaccum system. Tuning is insane to get them to run right. I have 450cc injectors and a 255lph fuel pump and I was still running lean with the VAFC in the positive. I had to put the FMU back on it in order to get a smooth fuel curve. say goodbye to your gas mileage.

remember anything can be done, its just a matter of how much time/effort/money you want to invest. Remember you also have to face the fact that after you invested countless hours into it you might need to throw it all away becuase it doesn't work.

With all that said, good luck

Re:RX7 Twin turbo
 

Wow, thanks Whitey

Re:RX7 Twin turbo
 

whitey...with the afc in the positive werent you getting map cels?

Re:RX7 Twin turbo
 

no, I wasn't getting a CEL but right now I don't even have the check engine light hooked up right now becuase I'm rewiring the instrument cluster.


Why would you think that having the AFC in the positive would throw a map code?

Re:RX7 Twin turbo
 

because when you hit boost the ecu should freak out...with it in negatives, it scales back the map voltage enough to keep the ecu from freaking....maybe i got this wrong, it might depend how much boost you are running...its too late to think now

Re:RX7 Twin turbo
 

you're right ghettoturbo.

Re:RX7 Twin turbo
 

nope, no CEL yet

Re:RX7 Twin turbo
 

Guys I own an fd and I can tell you the sequential twins would be a pain to run sequentially. There are something like 70+ vacuum lines and about a dozen solenoids that help it operate. You would be much better off running them non-sequential. They are Hitachi ht-12's by the way and I have heard of people pushing up to 18psi through them although I'm sure that's beyone there efficiency range. The most I have ran is around 12psi. I am single turbo now though with a Greddy t-78.

Re:RX7 Twin turbo
 

http://img.villagephotos.com/p/2003-...1/DSC00249.JPG
look wat iii got.hehehe

If you guys dont already know i have a crx with a tdo4, but that project is done. i will either go dual cam or single cam- twin turbine.

with the rx7 twin setup what ive noticed is that there are two small exhasut intlets -left and right- and another for a wastegate(the middle one in the pic). im sure the middle opening is the one that actually controls the sequential pattern of these turbos.

for the wastegate acutators they both open when boost is sensed in the compressor housing. the acutators do have two nipples comming out of them but im sure they are for boost guages or some other sort of boost sensing mechanisms.
http://img.villagephotos.com/p/2003-...1/DSC00247.JPG

Re:RX7 Twin turbo
 

Check to make sure there are no cracks between the turbine housing outlets because that is common. If you ever have to rebuild these you should stay away from the Turbo City rebuild kits because they are straight up ass and most who have used them report smoking from the turbos within weeks if not days after rebuild. I'm still not so sure you will get these operating sequentially although I'm rooting for ya! Keep us updated ;)