let's say that i could get a 20b rx-7 cosmo with just about everything with the engine and it even comes with a tranny. besides the engine mounts that i would have to get custom to make it fit into my 94 rx-7, what else would i need to do to make the car work and drive normally. also how much would the costs be around on each and everything i would need to get or change in order for the engine to fit and function to it's optimum level? please tell me everything you guys know cause i really need help on this topic. everyone tells me that it costs a **** load and that i would have to spend 15,000 at the least, but i don't see what else there is that would be necessary for me to do in order to make the car work besides the engine mounts. the cosmo comes with the turbos, ecu, tranny, distributor, intake manifold, exhaust manifold, starter, power steering pump, throttle body, sensors, ac compressor, fuel rail, and fuel injectors. what else would i need and how much would it cost? thanks guys

 

here are a few things https://www.rx7club.com/20b-forum-95/where-does-all-costs-come-59544/

 

i also wanted to know if my power fc i have right now would fit onto the 20b cosmo or not...thanks

 

a stand alone is a stand alone i dont see any problem with that..if it already has a map loaded onto it ur gonna need to load something else onto it and get it tuned...or just sell that and get the aem ems it does a lot more and controls more things for like 200 bucks more

 

yeah but are you sure that everything included is going to work and not need to be replaced? If you have to tear into that engine at all then you are talking major money, plus there are only so many people and places that can tune and work on that engine. You do live in Cali, so that is a plus. Are you working on it? What happens if something breaks. Replacement parts and such? I don't think you could put one in without spending $10,000 somehow or another to make it run right. I could be wrong. I doubt it though.

 

Here's a good place to start: https://www.rx7club.com/forumdisplay.php?f=95

And no, the PFC will not control a 3-rotor.

 

why wouldnt the pfc work on the 3 rotor?

 

cause the wire heads wouldn't fit...the 20b cosmo has different wires...a full standalone would fit but the power fc isn't a full standalone...it hooks up to the engine's stock wires.

 

by the way thanks for the previous link you sent me twisted 7....thanks quicksilver rx7 too...you guys really helped me out here and convinced me to get a 3 rotor.

 

no problem u will be able to make more power outta the 3 rotor anyway its gonna be a long process...post pics when u finally get it done

 

first of all, the 20b tranny is an automatic, no matter what. you cant use the stock ecu unless you keep the auto tranny. If you wanna keep the auto trranny thats fine, but its also damn stupid. also, only a select few number of people can install a 20b using the stock subframe. The general procedure is switching for a different sub-frame with different and not as good steering. there is a 20b forum under the rotary performance section of this site with some good information. and it WILL cost 10-15k.

 

Ppl always think "oh yea I'mma do this...this is awesome!" until they spend about $10K in parts, and realize they have about $20K in parts and expenses left, and it's ALL custom fabrication work. EVERYTHING is custom. It's no where NEAR a "swap." Then they put their 1/4 of the way through 3-rotor project up for sale, cuz they realize they're 100% dead broke, and miles away from being finished...

 

https://www.rx7club.com/showthread.p...&highlight=20b

 

yes. the David Hayes 3-rotor thread is the longest thread ever. If you want one after reading that, then you are BS'n yourself, not just us. READ IT!

 

20b motor................................$3000

street port'd motor build......................................$4000

ECU..............................................$ 1200 - $3000

Thinking you can "SWAP" a 20b into a 3rd gen for under 15k.......................PRICELESS

Seriously, IF and I mean IF you did the rebuild and ALL of the custom fab work yourself you would probably only spend 15k.

 

i'm getting a complete swap front clip (without engine mounts or chassis) for around 4500 from this place i know. i know i need a new full standalone (haltech or somethin of the sort for around a grand), no need for a rebuild but am getting engine ported with new/bigger seals (probably another 800 to a grand or so), for what i've found out so far about a grand and a half on engine mounts and other misc. parts, stock turbos which it comes with, 500 for a fluidyne radiator, about a grand or grand and a half for a nice intercooler, and another grand and a half to two grands for stuff that just come up with a conversion like this. total of that comes to about 10 grand which isn't bad at all considering that i got hooked up with the cosmo. for what i saw above the 20b only comes with automatic, but someone also said that i could use the stock fd tranny so that wouldn't cost me anything extra. sound fair or am i doin somethin wrong?

 

all of the work possible, except for the custom fab stuff and the engine mounting and welding for any part i need, i'm doin myself so don't count ridiculous costs for hours of labor and stuff like that. is this idea possible for what i've gotten so far or am i just bsin myself and i should stick with a 13b with a single turbo setup?

 

Judging by your posts so far, you have absolutely NO idea what is truly involved to properly install a 20B. Stick with the 13B. We get people all of the time talking about or even beginning to attempt a 20B swap...guess what percentage of them actually complete the swap? I would say about 2%. Maybe less.

 

Do you realize that literally HALF the cost comes in PURE FABRICATION work? Ppl said many times that parts alone, it'll run you $15K. Then you gotta tack on an ADDITIONAL $10K - $20K in fab work and associated labor necessary. Again, this is NOT a swap at all.

Oh, and hate to burst your bubble, but your "shop" didn't hook you up at all. If you're planning on making ANY type of worthwhile power, 90% of the crap that came w/ the Cosmo front clip you're gonna be throwing away. All you needed was a long block, which I sell ALL DAY LONG for under $4K anyway. And those are late series motors, too (C & D series).

 

Haha, zapped.

 

You do also realize most of the stuffs on the front clip are useless..

Who in the world is going to port your engine and new seals for 800??? I can't even get all new seals for less than 1k. And I get cheaper than dealer pricing. And I'm also guessing you're putting in 3mm seals when you say "Bigger"?? 20B rebuilt will cost you 3 to 4K addition to the engine. Acturally the engine is the cheapest thing to the conversion.

And don't forget about tuning.. You'll spend at least 500 or more for tuning.. unless you're an expert in tuning.

Do some search on the forum for more info.. There are literally tons and tons of info on this forum about 20B swap.

And NO! PFC is made to control 2 rotor engine and NOT 3 rotor.

 

yep no PFC. Need a FULLY programable stand alone. Also, check out what people were able to achieve with a built 20B, it will help you to determine if the cost is worth the power and all the CUSTOM FABRICATION that is needed. Its not happening. Just sell the Cosmo engine and get a fully built 13b and get a badass single set-up. That is your only option. You have heard from over 60,000 posts of experience on this issue and all say reconsider before you waste your time money and materials. Take it for what its worth. Most of these guys could be paid for their advice, so please consider it to be the best out there. Hey, but ignorance is bliss, and you seem to want someone to tell you to do it and that you are right and can do it for under $10,000. I will bet you $10,000 that you exceed that limit without performing any labor at all.

 

right Phil ,Kyle, Ramy?

 

800 bucks for porting and bigger seals, now that's a hookup, have you consider'd that your engine may not be ANY good and will need a complete rebuild? What HALTECH can you buy to run a 20B for around a grand? The e11v2 alone will run you @ least $1300. Aleast a grand for a intercooler is about right, but what about the intercooler piping, you can't use piping bent for a 13b. You are BS'ing yourself.

 

im doing a 20b conversion too. . . but mine is different. . . and cheaper. . . a poor mans conversion. . . ill put 3 doritos and a peanut in the engine bay and terrorize the streets!!!

i love this stuff. . . people think this car is a honda and that some company makes the "swap kit" for the engine to go in their hatch. . . get a clue on that. . . this WILL take the money you couldve paid off your credit card with. hell, just owning an rx7 forces you to charge one up!!!!