I had Noel Alverez from Rohtech in Orlando verify that my 13B was dead; 0 PSI on the front rotor and 60 PSI on the second--Toast.

I made the decision to revive life into this FD with a 20B resurrection! I just purchased a D-series 20B from Japan2la and I am waiting for it to get into town. Rotech in Winter Garden FL is going to be doing to conversion. I will be posting numerous pictures here as the build progresses. In all I figure when the motor gets here, it will be 5-8 weeks in the shop.

Here is what we are going to be doing:

-20b is going to be torn down and new seals are going in.
-Mild street port
-Borg Warner turbo and custom pipes
-FMIC
-Upgraded Cooling system
-Dual Oil cooler setup
-Upgraded Fuel system and rails
-Upgraded Injectors
-Microtech ECU
-Custom subframe and tranny mounts
-rear differential brace

My goal is to get a reliable daily driver that can put down 500-600 hp with a crisp throttle response. I live in florida, so A/C is not an option.

Feel free to add any suggestion during the build

 

great project good luck.

 

Nice clean car to start from. Keep us updated with the build. Great to see how others reach their goals. Any ideas on what sized BW turbo you might go for?

 

I am thinking about the s300

 

Thumbs up

 

I think i am going black powder coat the UIM/LIM instead of polishing the Alm.

 

..........hhmmmmm........how hauntingly familiar ..........looks almost identical to my car ........shold be awesome , i hear nothing but good stuff from those BW's ,.....should be a killer
......in any case, you have the "looks" part down already !!!!! :-)

 

..........hhmmmmm........how hauntingly familiar ..........looks almost identical to my car ........shold be awesome , i hear nothing but good stuff from those BW's ,.....should be a killer
......in any case, you have the "looks" part down already !!!!! :-)

 

You will need a larger s300 or probably s400. I used to have an s361 on my 20B for a little while, and it was pretty undersized. Even the s366 will be hard pressed to make more than 500whp.

 

How many psi were getting out of it?

 

PSI are irrelevant. It's all about flow. I can give you 10+psi from my lungs (provided you give me a small enough orifice to blow through. The s361 would have been running at full capacity (lb/min) on a ported 20b. Figure out your HP goal (~7.3hp/pound of air for a rotary) and then find the smallest turbo that has that flow figure in its max efficiency range (on the compressor map) and then tweak from there. You want a turbo that is matched as closely as possible to what your goals are to give you max. area under the curve.

G'luck with the build.

 

Is it true that you want to stay under 17-18 psi? For the safety of the engine. I agree about the flow rates and max capacity. Maybe the s400 would be a better alternative.

 

Good luck with the build mate

Mir

 

I think you want to stay under 18PSI for the safety of your sanity.

A well built 20B at 18psi will give you 600-700whp. IMO that is too much to make an RX7 enjoyable unless you spend a lot of time and $$$ on chassis, suspension, and driveline mods to handle it.
In reference to your question, there is no set limit for what you can run. It is all personal preference and the goal of the build. The drag race guys run 30psi on 20Bs, but they don't mind blowing one sometimes.

 

Instead of going with a dual oil cooler setup, we are thinking about using a single Turbo II oil cooler which is wider and I believe has better cooling. Any thoughts?

 

Great looking FD good luck with the build.

 

Any figures on cost so far? I've seen some of the older threads quoting some seriously high numbers and wasn't sure if all the experience has brought the price of the job down yet.

 

It has been a while since my last post on my build, but it is almost complete I want to know what you guys think.

First picture is what I started with and the second is where it is now

 

Here is the First start up

 

nery sweet fd!

 

Any info on those sleek lights? I'm not familiar with the design.

 

Those are C West headlights. I put in Bi-Xenon main lihgts from a BMW M3 and used a trim bezel to fill in the space around.

 

Sorry to ask but I've been throwing up the idea of a v8 conversion, but the 20b doesnt sound like a bad choice, hate to ask sure its a little different for everyone, but what was your total build cost?

 

this is a great job, I really like how you were able to get the UIM to clear the strut towers.

 

We are almost done and I am in the 25K range, but with that said, there is a new fuel system, turbo, ecu, etc.. Staying true to the rotary engine and getting the power of a V-8 is why I was willing to spend the extra cash.