rxbaby7

iTrader: (1)

After paying off the f'n government I'm going to start in January setting up my 93 rx7 I want the 20b swap but I do enjoy the 13b TT don't know which to go through with? Just looking for insight from the rotary families? Thanks

fendamonky

iTrader: (6)

What is your budget and ultimate (performance) goal?

The 20B build is gunna be pricey, a 2-rotor with a properly matched single turbo and high quality, well planned, support can be very formidable.

rxbaby7

iTrader: (1)

I really want to keep the twin turbo but I see a lot of people do the single set up is there issues with have twins to build around?

fendamonky

iTrader: (6)

The "problem" with the twins is that A) they run out of their efficiency range at 15psi, B) the manifold is pretty restrictive C) people run into difficulties getting the sequential system to work right (if you're gunna go non-sequential you may as well go single), D) heat. They make a LOT of it, and finally... as a result of A-D you're pretty much restricted to sub-400whp.

Twins are AWESOME for lower power where your focus is on response and low/mid range umph.

Since you threw out a 20B as an option I figured you were looking for higher power.


If you aren't already familiar with these cars I do think it may be a better idea to start small and work your way up. Even 350whp is enough to get yourself in LOTS of trouble, fast, if you aren't paying attention. Plus... as power goes up, reliability goes down... if you're not familiar with the rotary that means "very expensive".

rxbaby7

iTrader: (1)

I'm looking into 4-600 hp but your not kidding about very expensive lol the twins couldn't run on a 20b with our issues or there will be to much lag on it

Broke_A_Baller

iTrader: (26)

I too contemplated either 20b or single turbo.

So far I am in the middle of the my single turbo swap. I am doing it slowly, but it is quite spendy.
I am shooting for mid 400hp (I am still planning my N/A high comp. 20b build in the near future).

Most people do not look to get 400-600hp on the stock twins (unless of course you're in intial d :p).

I opted to go with the single turbo conversion initially to simplify. Look to spend at least 5K on a decent single turbo mod.

Injectors are like $400+
Rails (if you go aftermarket)---$250+
FPR---$100+
good manifold---$700+
Wastegates---$300+
Turbo---$700+ (for a used one gt35/40)
Fuel Pump---$100+
intercooler---$100+
Radiator---$100+
Downpipe---$100 +
ECU----$1000+/-
all sorts of other parts +$xxxxxxxxxxx

vs 20b
$5000+/- engine itself
$500+/-?ignition system
$1000+ ECU
$xxxxxxxxx----whatever else you want to do to it

Anyways, it truly depends on your budget as most members will probably say.

Good luck!!

rxbaby7

iTrader: (1)

Thanks fellas love the info!!

fendamonky

iTrader: (6)

I've got a feeling that your price estimates are very much on the low side...

$400 for injectors on a 13B is very much on the cheap side ($600-$800 is more accurate for GOOD injectors) $1,000 for an ECU will just barely get you into the entry level market, the turbo kit itself will run you $3,500 for a QUALITY kit. All your $100 quotes for support items look like they are for cheapo ebay parts. Getting cheap/knock-off parts will come back to bite you in the *** with these cars, ESPECIALLY if you're chasing higher power!!

I've never put together a 20B, but I seem to recall hearing that the factory e-shafts were not exactly good for higher power/boost applications. I'd factor in another $3,500+ for an e-shaft, plus you've got the fueling to account for ($1,000 in injectors alone), $425 for fuel rails, $2,000 for the subframe, $2,000+ for the ECU, $1,000-$2,000 for a (decent) wiring harness, $3,500-$4,000 for a turbo kit, $750-$1,500 for an IC kit, Shop time, tuning, suspension, brakes, rubber, rear end, etc., etc., etc...

Your estimate of $6,500 for a 20B swap is a bit of a pipe dream... OR a stupidly low quality build that is just going to turn into an EXPENSIVE ***-pain for somebody else down the line..

Plan for $10,000-$15,000 to PROPERLY convert to a high(er) power single turbo setup (because murphy, and **** builds up over time), and I'd plan on an easy $25,000+ if you want to go 20B (again doing it PROPERLY, the first time..)


Just being realistic here... it is NOT cheap to play this game properly.

Broke_A_Baller

iTrader: (26)

Sorry I was going from what I spent on my single turbo conversion so far. You are right about the injectors...I spent $500 on my id2000 and 550 primaries NOT $400 (oops).

Oh and my Garrett gt4088r, dual wastegate setup did not cost me $3500 (guess Garrett and turblown aren't QUALITY in some people's eyes, but they are quality in mine).

Maybe some people over pay for QUALITY parts????

My adaptronic ecu is worth $1400 yes, but I was basing it off of what I've seen other members sell them for here (recently a member sold one for $1000).

And as for criticizing my prices for the 20b build.....as you could see I only put roughly the motor and other little things.

I cannot confirm or deny that your pricing of around $25k is unreasonable for a 20b as I personally have not built an fd with a 20b. I agree that you're more likely than not accurate (it does get expensive fast especially if you have someone else do the work for you).


I bargain shop as I assume most people do . I also do as much things as I can by myself or my other rotary enthusiast friends.

If you seen my garage, you would know I don't purchase "cheap ebay crap."

So yes I got a fuel lab mini fpr brand new for $100. Thanks to Rick at fuel lab .

Nonetheless, if the OP would like to know exactly what I paid for mine so far please feel free to PM me.

I still have about 2-3k left in parts id like to buy to get it to where I want it to be, but I am far less than $15k.


Once again, good luck!

rxbaby7

iTrader: (1)

That's what I figure 25k n up for the 20b but that's just with the single turbo set up