Nader Shokair

Hey guys,

Well my twin turbos had a fried turbo manifold (go figure) so I sort of reluctantly opted to get a single turbo (I wanted to wait on this mod untill my driving skills improved O_o but opportunity struck with a hookup or two ). So anyway, my question is what vaccum hoses are illiminated when a single turbo is introduced? Any diagrams would help greatly. I understand that this question may have been posted and so I ask that if anyone knows of a thread that addresses this please send a link. I just gotta take care of this asap, sorry for the inconvenience of reiteration. Thanks guys for any and all help.

Nader

wonder1and

have you started on it yet?

Nader Shokair

motor is sitting on my work bench... I have a mechanic friend that I asked to do it. right now the intake mainfold is off and we're staring at the solenoid rack (any electrical changes to be made at this point? since it's all exposed it would be convienient) and vaccum hoses... We havent started anything yet but the twins are off along with the old exhuast mani. I'm having the oil lines fabricated. anyone with a diagram? It would make things a lot easier

wonder1and

There is a male vac connection on the LIM that I ran my feed off of. From there it gets double T'd meaning one in 3 out. 2 of the t's go to the oil injectors and the other to the stock FPR at the end of the 2nd fuel rail. then on the UIM one needs to run to the Map sensor. the rest can be capped and removed if possible... i.e. all solenoids. The vac connection at the top back of the UIM gets left open... the double throttle connection . Run the 1 8mm hose from the oil filler neck to the UIM w/ check valve. What ECU are you running anyway? some will throw codes if you remove the solenoids. I have the PFC. PM me if you need any more help
Good luck,
Ryker

Nader Shokair

Thanks for that, I'll do my best to follow your advice ^_^. Any other things to think about? And pictures or diagrams?? Thanks ya'll

Oh yea, I'm running a stock '94 non-cali 5speed ECU for now ...I know this will pose problems but I really want a PFC and so I'll wait and save up the $... I'll probably buy one used with a commander.

Sinful7

I found this diagram a while back and was gonna use it as a referrence for when I go single, guess you need it more than I do.
The vacuume lines(ones with question marks) I've seen people just T them together and seems to work.

Sinful7

OK I found the link to the vacuum diagram!!
Here
And here is the link to that thread. Thanks to Shawnk
https://www.rx7club.com/forum/showth...threadid=82547

Nader Shokair

Omg~ Thanks! Sinful that's awesome.. also thanks to Shawnk. Wonder1and I'm gonna PM you with that diagram, could you please mark where/which each vac hose should be kept? I'll assume the rest can be removed. Thanks everyone. If there is anything else I should know about the conversion (vacume hose or electrical or otherwise) please share, I'll be starting Weds on this ^_^

wonder1and

Here you go... the ones on the Left... The close one goes to the Manifold and the far goes to the FPR.
The other two go to the oil injectors on the core.

wonder1and

Here is how I have it... the bars in red Represent plastic t's like you can see in my pics.

Nader Shokair

Thanks a lot Wonder1and! That was a lot of help and I hope this thread helps others in the same situation too. Do you know if it's ok to remove the soleniods with the stock ECU attached?? I think that's all and I'm ready to go ahead and get started. Thanks again^^

wonder1and

np... sent pm

shawnk

I am amazed how many times that drawing comes up these days..

FYI it was a work in progress - I dont think that is exactly how I have it setup now but I am still not finished with this project and going back and correcting that drawing is low on the "to do" list.

I did that drawing so that I could ask others some questions (and that was back in the day I had time to burn at work). So please make sure you dont just go by the drawing.

The other thing that I think you should do is check out a thread on the oil metering injectors:

https://www.rx7club.com/forum/showth...hreadid=186477

Make sure you read the whole thing because we all kinda worked through it, but there has always seemed to be endless discussion on this subject. I am convinced that hooking them to a filtered atmosphere source is the way to go and I will be switching it over this weekend when I do my fuel system (again...).

I ended up removing the fuel vapor stuff completely and kept the PCV valve as the second line was capped for my single conversion.

Anyway I am glad that drawing is of some use...

Shawn

Nader Shokair

Thanks shawn! It really was a great help in visualizing what the hell I was supposed to do regarding the Ts... I'll read that thread just as soon as I'm done with this post. Ryker (Wonder1and), you told me in your PM that my stock ecu might throw codes... but would they regardless of whether the soleniods were there or not... if so, could I just remove them then? I mean, if I'm gonna get codes either way they might was well go in the trash... btw, what do the error codes do as far as fuel maps and such? is there a "safe mode" type fallback that the ecu executes like some other cars I've delt with? If not I don't mind some error codes as long as the car can fuction normally under normal maps just untill I can get enough money for a PFC.. I doub't it will affect boost since I'm gonna run an external wastegate. Thanks

wonder1and

Well I think if the car starts throwing codes in important places I think there is a chance that the ECU will run you rich and retard the timing... either way what size turbo are you running? And what fuel setup... I'd hate to see you pop your motor.
-Ryker

Nader Shokair

Ooh I hate hearing that.. "pop your motor" it makes it sound like a toy :P. lol anyway I'm running a T4 with an a/r of .50 on the compressor side and .60 on the intake side (a friend recommended that setup for quick spool on a T4). I'm gonna run stock boost (is it 10 or 12? can't remember) through the stock intercooler setup for now. I don't wanna run more boost untill I can get a front mount intercooler and a better fuel management system. I know that 10 or 12 pounds through the twins is not the same as the 10 or 12 pounds pushing through a T4 but I have no choice at this point (need to save $ :\) A fuel pressure regulator and fuel cut defenser is on the way before I turn the ignition. Is this gonna hold together ok for now? ...If the ecu is going to throw codes that retard timing then I'm probably going to just leave the soleniods untill the PFC. Will that take care of it or am I gonna need something like an S-AFC? Remember these are not perminant fixes... just something, anything reliable untill the rest comes along.. If anyone could offer advice along those lines I'd really apreciate it. Tell me if there is anything I need to worry about, I'm new at this single turbo conversion stuff. Thanks ^_^

btw thanks shawn I read the oil injector thread and it was very informative, so you're running a mini atmosphere filter then? I suppose I'll do the same since I don't know of a better solution.

wonder1and

AFC sounds good for your setup since your running that ecu... is your radiator upgraded yet? Make sure you run heavy wt. oil also. is your turbo installed... on the way or what? did it come w/ everything?
-Ryker

Nader Shokair

Ryker, It's installed with the exhuast manifold on the block... i forgot to mention that my engine is street ported, tell me if that changes anything. I'm getting the oil return lines for the turbo fabricated (it's oil cooled).. I have a touring model that used to be an automatic so that means that I have a tranny oil cooler and a regular oil cooler, I'm going to try and convert the tranny oil cooler into another engine oil cooler. As far as the error codes, since I'm running a stock ecu I probably can't to anything about them.. guess I can only hope for the best^_^. I'm going to try to use the stock piping with as many modifications as I need as far as pipe lengh and such and weld a BOV to the stock elbow. Anything else to do? I haven't given thought to an upgraded radiator, that should also help along with the second oil cooler.

wonder1and

The tranny to oil cooler conversion wouldn't be worth it IMO since you can get a oil cooler for less than 300 bucks that does not require fabricating. I have a Koyo Radiator... its the cheaper way to go and looks good but since I'm in texas where it is always hot I have to run the fans all the time. I think a fluidine dyine whatever... would be better for hotter temps b/c it flows better. You said that it used to be automatic... is it 5sp now? Keep you eye out for that PFC.. i.e. ebay and the FS section. I may be able to help you out on that when you need it. Depending on the temps on where you are you could either run a M2 Large Stock mount or a smaller FMIC. How did you manage to weld the bov onto the stock elbow if its plastic? Are you still on stock injectors?
-Ryker

Nader Shokair

Oops my bad yeah that elbow is plastic:P haha well I guess I'll weld it wherever I can. Yeah I still have the stock injectors. I've looked at prices and I think I'll go with a Koyo (How much better is the fluidyne? ...I live in southern Cali is it worth it?). Thanks for the help about the PFC. I'll definately let you know when I can get one^_^. As far as the intercooler thing I really don't know which to go with. Front mount is cool and all but it blocks the radiator, and the stock mount will get warmer air.. so there are the trade-offs I guess, what do you think is best for southern california weather?

Oh and the oil cooler thing, can you give me a link to a page that sells them at that price?? All I can find is a rediculously expensive Trust twin oil cooler setup (like $1200 or something like that O_o). Even the ones made by Rotaryextreme.com are expensive.

wonder1and

on the oil coolers look for people parting out R1's and get it from them. Think of it this way w/ the FMIC and Large SMIC... The FMIC will work better w/ the fluidyne and the Large SMIC will work wel w/ the Koyo... on the Turbo kit how does it attach to the IC? you might need to buy a weld on flange for your BOV and mount it to that pipe. With stock injectors you should not run more boost than stock if that... the 550/850 setup can take some power but not much more than 300hp.
-Ryker

weaklink

ok I have a question...there are two ports coming off of my upper intake manifold on the passenger side. One goes to my boost gauge (the one closest to the firewall). According to the diagram, the other one should go to my BOV. Instead it is just open, and by open I mean sitting there uncapped. There is vacuum, and if I put my finger over it, the engine bogs. The BOV is connected somewhere under the UIM. It functions correctly. Is my configuration ok? Originally I suspected that the port was meant for the PCV. Any suggestions?

wonder1and

Cap it

Nader Shokair

hehe I agree... but doesn't the engine bog you say? .. that's a bit odd... what about under load?

wonder1and

Motors probably not used to it... either way with it uncapped your losing vacuum