wondering if this is a good turbo to put in my tii and if i will need to upgrade any other parts at the same time, all i have is a manual boost controller.
i ask bc i'd imagine i could get one for cheap on the forum here.

 

No

 

 

very helpful.... why not.

 

i actually did this in real life when i read it. i used to get mad when people would make comments like this to newbies but to be honest...it is getting very very old. same stupid things over and over. im starting to understand why the Vets act the way they do

 

a 15 sec. google search would answer your question...
have you ever......hmm how to say this.... just freakin type in Rx7 turbo in google click images and you will get your answer

 

a stock fd has 2 turbos where a fc only has one. Look at other avenues for upgrading.

 

edit

 

i concurr...
cmon guys no need to be rude

 

hey man i'm no expert either but this site is supposed to be friendly and helpful. we are supposed to get at a little input from other owners that have done it before. i have googled for three months and still would like some help as well for the same subject. not to be rude at all but dude if you don't like don't post man. we are all supposed to help. let me know if i am wrong about this site and i will not waist hour of my time reading all this stuff.

 

as long as they don't hit the LIM (I can't say I've measured) I don't see why they wouldn't work. you just need custom oil and coolant lines and an EMS that doesn't require the AFM (or some crazy intake piping). you could even run them sequentially if you know what you were doing. but it's the whole "if you have to ask..." deal. The fact that you made a thread about this does not inspire confidence.

If you're really serious about this, here's what you do. You get a set of used twins and an FD exhaust manifold. Remove/permanently open the turbo control and precontrol doors. On the wastegate, use a precontrol door and port the passageway for solid boost control. Run custom oil return lines--one to the front cover (factory location), and the other you will have to run right into the oil pan by welding in a flange. You may need to get some flanges machined that will go to the turbos themselves (oil feed and return flanges on the turbos). I am not sure off the top of my head whether the FD flanges are a standard type or not. I remember them looking like typical T25 style but I could be wrong.

Feed the oil from the front iron (stock T2 feed location) and either split it off to the two turbos (not sure how well that would work) or tap the other oil feed from the oil pressure sending unit location or from an oil filter pedestel sandwich plate. You have to be really careful about the fittings and the routing of the lines to prevent leaks. The coolant feed comes from the T2 LIM, the stock location that normally has a hard line bolted to it for the stock turbo. Take a split air blockoff plate (same flange as factory water feed line). Drill a hole and weld in a 6AN fitting to the blockoff plate. Connect a 6AN tee/splitter to the fitting. Bolt the blockoff plate to the LIM and you now have your coolant feed source.

For the coolant return, you can run one to the factory location by welding an aluminum 6AN flange on to the barb that's already on the waterpump housing. The other coolant return you might be able to tee into the heater hose return at the bottom end tank of the rad (not sure how well that would work). Another possible option is to remove the two terminal water sensor for the subzero start assist at the bottom of the rad and return the coolant for one of the turbos there. You have to be really careful about the fittings and the routing of the lines to prevent leaks.

Use the factory Y pipe for the compressor outlet but remove the charge control valve and plug the holes with JB weld. Boost is controlled with the wastegate valve, pre control does nothing. Then fab intercooler piping. Modify a downpipe that is supposed to be for an FD.

As long as there is LIM and strut tower clearance (and I'm not sure about that), it can be done.

read this article about how the factory sequential twins work:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/why-engine-so-damn-complicated-part-1-sequential-turbos-demystified-841821/

running them sequentially would be easier with a standalone and will probably require a custom solenoid rack, plus you need to REALLY understand the plumbing. Technically if you had an Rtek 2.1 and a nitrous window switch you could do it sequentially. Control the charge relief solenoid with the window switch. Switch the turbo control vacuum, turbo control pressure, and charge control solenoids with the rpm activated switch function in the Rtek. The charge control solenoid will need a relay to invert the signal, as the charge control solenoid should be switched OFF at the sequential transition point while the other two solenoids should be switched ON.

If I had a random T2 and some extra money I think I'd probably try to do it all sequentially just to prove people wrong (not because it would be that great of a setup)... it can't be that hard if you've done custom turbo setups before and you understand exactly how the FD twins work.

 

^In a nutshell....



not worth it. It has been covered by the way. And if 100's of noobs would search once in a blue moon they wouldn't have to have "rude" comments made. I know we were all noobs at a point, but if you look in the new member section it says somewhere that you need to search before you ask. And no-it doesn't take an hour to find your answer. Day 1 when I joined I knew to search due to the sticky thread that said "new members read this before posting!"

 

Again........ NO



SEARCH, not a new idea, and still not a good idea.

~Mike.............

 

I wasn't trying to be rude, I just didn't think anyone would try and do this when there are much easier and cheaper ways of upgrading a FC.

 

by no means was i trying to be rude. Im just saying cmon guys help him out. no need for the facepalm thingy... im here to share any of (if any) of my knowledge about these cars. but seems some1 might have answered the op question.

 

yeah you find people like the OP being all about some custom swap... until they find out what's involved.

 

you just have everyone with a low post count pegged don't you.

anyways no i DID NOT want to do a twin turbo setup and that is not at all what i was asking. i was simply asking about swapping 1 turbo from the fd and putting it where the old turbo from a fc goes. seemed like a simple swap to me, and made sense for 2 reasons 1.bigger turbo 2. cheap.

i hate when people say "search" too because whenever i use the search function i have about a 50% chance of finding exactly what im asking bc vbulletin search sucks. yes i did search and i didnt find anything with a thread title specifically related to what i wanted to know. not going to read through every post in 20 different threads...

 

1. The FD TWIN turbo set up.....
ONE FD turbo from the OEM factory twin IS SIGNIFICANTLY SMALLER then the FC turbo. And NOTHING is interchangable between the two, they are completely different systems. 2. CHEAP? Well, no since in even responding to this because of how clueless/ignorant you are on the subject, but that's why you posted though.....
Using one FD single turbo would never work, or I should say some moron could get it to work, but it would be a huge cork in the engine system and make less power then most N/A set ups. Now if you were referring to using the factory twins (Which everyone and myself assumed), it could work, but the expense/time/and fab work to get it functioning would be a total waste when you could pick up a decent sized single and supporting hardware for equal too or possibly less money and a whole lot less work, less weight, less engine heat etc. etc.

Well, I suppose there is always someone willing to spend a half an hour or maybe longer typing up a response and SPOON feed lazy ***'es who could find their answers in the same amount of time doing a search.

~Mike...........

 

I just spoon fed him useful information. you tell someone to search, they complain. you give them useful information, they complain.

here's more spoon fed information

12A turbo: HT18
FC turbo: HT18S-2S
FD turbo: two HT12's
Cosmo 2 rotor: two HT10's
Cosmo 3 rotor: one HT15, one HT10

all of these turbos have proprietary flanges etc and the twins come in an assembly. it's not like stock twins on a 3000GT or something.

 

well at least you tried

 

your right i did search there and it is full of stuff. this website seems useful not sure if it all is correct.


http://www.turborx7.com/turboups.htm

 

What a load of ****, when you got stuff like that as "advice", you may as well not bother.

And I quote...


Ever wonder why single turbo 3rd Gen RX-7s sound "rough" when idling or under slight acceleration? The reason is the wastegate. On the stock twin turbochargers the wastegate is internal. Exhaust gas routed through the wastegate is still discharged down through the exhaust system. The same theory applies for the single turbos except that the wastegate discharges to the open air. The result: when no or little boost is needed the exhaust is shot directly out the wastegate making the car sound "untuned" or like it has an exhaust leak.

When boost is demanded by the engine, the wastegate is completely shut and the exhaust gas routed over the turbo is then discharged out to the downpipe and through the rest of the exhaust system.

What a load of ****! Wastegates, unless they are broken and leaking, doesnt make ANY noise at idle of light acceleration, as its shut at all times till near as damnit full boost.

So there you go, an RX7 "advice" website written by someone who has seemingly no actual experience of RX7s! Winner...

 

^It is the internet. You can make a webpage about anything you want...even if it's *** backwards.

 

:

Well i said i was not an expert. thanks. that just goes to show my original point being we can search all we want to learn but we need more info from owners that have the done it before so we can hopefully make and educated decision. so that website sucks then. any other opinions?

 

knightsports makes a good upgrade for fc's look into turbos for your car specifically, not turbos for other cars less headaches to many vac lines ask any fd owner