This may sound like a noob question, but I am new to these cars. I have dived head first into reading every bit of information regarding rotary's using this site as a huge site and others such as turborx7.com and http://www.onlinefreeebooks.net/?s=K...Rotary+Engine+ to really grasp what I am getting myself into and whether I want to continue searching for one.

Instead of being swayed seeing a new type of engine and the involvement of not one but two turbos I find myself wondering if the mazda rx7 came stock with a twin turbo and you convert it to a a single turbo setup what type of modification and changes are made ? Are these changes due to only one turbo attatched to the engine permanent and irreversible ? I find many of the cars for sale that I am interested in have been converted to a single turbo setup, if I ever wanted to go back to a sequential twin turbo setup (which I likely would) for a better driving experience and smoother ride (damn NJ traffic :/ ) would I even be able to do it without getting a new engine or is it just extremely challenging?

Thanks in advance!

Pete

 

First off, all FD's (3rd generation RX-7's) have the same engine and are all twin turbocharged.

It is often very difficult to switch back to the stock twin turbos from a single setup because many people cut unneeded connectors off the engine electrical harness and get rid of many emissions and "luxury items" such as power steering and A/C. It would take a long time to source all of these parts and install them onto the car again, especially for someone who is new to RX-7's. The stock twins are also controlled by a complex web of vacuum lines and solenoids that would be difficult to re-install for a new owner. In summary, there is a LOT more involved than just switching a turbo and manifold.

To be honest, it sounds like you should really only be looking at cars with the stock twin turbo setup.

 

thank you for the advice, much appreciated.

 

My advice would be to buy a single turbo car. Although, I think having A/C and power steering are important. Losing those hurts resale.

The stock sequential systems very often have boost issues that are hard to diagnose and not many shops have any clue how to work on them. Just based on afterburn's description, it should be apparant there is a lot more "junk" in the engine bay. And therefore, a lot more that can go wrong.

On the flipside, single turbo setups are more likely abused cars, and have lot more fuel mods, standalone ecus, etc. Either way, prepare for a rebuild when buying a used FD.

I'd try to find a well put together single system where it is obvious the owner paid a lot of attention to detail and spared no expenese on building/tuning. Oh, and kept the more "streetable" amenities.

 

go get the biggest ****** single turbo known to man. even if u need a side car to mount it. then u can win the title
DYNO QUEEN

 

if you're new to these cars, you'd be better off with a well maintained vehicle with little modifications.

 

the car im looking at has a single gt-35r turbo professionally installed by Steve Osley who is apparently very well known in the Rx-7 community. The engine is a mazda speed 13b with 30k miles on it. Also has a power fc with commander on it and from all the research (headaches from the information absorption) I have been doing it looks to be a very good buy. The owner has never run the car beyond 8lb of boost and had all the fuel lines and injectors upgraded to accommodate the turbo. Arghx you would probably have heard of Steve Osley since this car is located in NC. Link to the sale on this forum https://www.rx7club.com/showthread.php?t=742330 Ive spoken to the seller and he has all of the receipts which I consider a big plus.

 

I've never heard of a mazdaspeed 13b, and I've also never heard of Steve Osley.

If I bought that car, the first thing I would do it toss those gawdawful headlights in the garbage where they belong

 

Lol I agree completely, Im a huge fan of pop up headlights : )

 

that car has been for sale for over a year and is fairly local to me. i have seen it and it a piece!

 

As in a piece o poo? The paint looked pretty nasty in the pics.

 

I've never heard of Steve Osley. There are few people I trust with Rx-7's in the whole state of North Carolina.

Buy this car and you will be in over your head. Oh, and anyone catch this little gem from the for sale ad?

Keeps dust out? How about PREVENTS VACUUM LEAKS ?????? Don't trust this guy. Wait for the right car man. There is nothing more bewildering than popping the hood on somebody else's modified vehicle and saying "what in the HELL did this guy do under here?"

 

haha, yes.

 

http://www.youtube.com/watch?v=K9V0z...eature=related

This is the turbo you need, check it out. Our mounting location allows for maximum turbo size.

PS: roll up your windows