Okay I have a 1988 rx7 fc N/A the motor has about 130,000 miles on it. It runs strong but I think if I add more power to it like a turbo I'm going to kill it. So the only natural think to do replace the motor. Here are the options I’m considering.
A: I get a rebuilt 13b motor from Akins rotary with a 3mm apex seal and street or racing boring. This is about 3000 for the motor, then another 1500 to 2000 for a turbo kit.
Supposedly the Akins rebuilds are really good and with the 3 mm apex seal the motor doesn't where out after 100,000 miles.
B: I get the same 13b motor with boring and 3 mm apex seal and put a 5lb or 7lb super charger on it. This also around 4500, with best guest of 250- 300 hp
C: I get the RENESIS motor out of a rx8 and put a supercharger on it. For 6000 Plus I get the tyranny with a six speed 300-380hp
D:I get the RENESIS and put a turbo on it, I was told by someone on the forms that the RENESIS don't like turbos so I will look in to that. 300hp or more I ??
E: I get a 20b or custom 4 rotor motor from Akins these come turbo for about 5000 250-320hp. I here the 20b tear the shit out of themselves real fast.
F: Convert the rx7 into a Camaro by putting a Chevy 350 small block in it.(This isn’t a real option anyone that replaces a rotary engine in a rx7 with a piston motor should be shot many many times)

My rx7 already has a full cad system with a high flow cat, intake, full under drive pulley set, no ac, I pulled of the belt driven fan and put an electric pull through fan on it. My best guest is the car is making about 200 to 210hp right now. I can kill v6 mustangs without even trying V8 are a little closer if they have a 5 speed.
So let me know what you ladies and gentile men think.
Other options are open for suggestions.

I would do a either a reman motor, or put the turbo on your motor. If it blows up it blows, up then move on to another motor. Putting the LS1 in the car is a great idea, all you would be able to do is drift. I love my rotary but i love my V8 also. Haven't heard to many things about akins, so be careful whatever you do.

oh FOERST off.....

turbo swap will be the cheapest way for power. ~1300 for the TII motor, 1200 for rebuild and you're still cheaper then an Atkins engine.

DON"T do a 20b swap, you obviously don't know whats all involved and aren't ready for it at ALL if you think they tear themselves up real quick.

Renesis engine in your FC, point on originality, but a waste of money for the little power you'll have at the end.

please go to any of the following sites and use the SEARCH function and read about swaps and all:

http://www.rx7club.com
http://www.fc3spro.com
http://www.teamfc3s.org
http://www.fc3s.org

sorry for sounding harsh but you need it. why would you even post a rotary question like that on a board where 95% of the people here own PISTON engines and don't have much (if any) rotary experience?!

[/rant]

here's info on the 20b swap and the whole $15k price tag that goes along with it.

http://fc3spro.com/TECH/SWAP/COSMO/20b.html

Oh and my 1985 13b makes 230whp 200lbs at the wheels on 6psi, enough to take down a littly modfied sti's, and run low 13's, and 12.9 at silver dollar. And i have less in my car than you would in your engine choices.

What did you put in your 1985?

The only resion I say that the 20b tear them selfs up is I know 3 people that have done the swap with a 20b that hat 25,000k on them{ebay mainly} and the seals go after 10,000 miles after installation. When I talk with people over at Akins rotary they said the samething only more technical.

they said the samething only more technical.

Yeah, I think they said "The 20b done blow up good!"


Back when I did tech support for a large networking/hosting company, every so often someone would call in with outrageous questions, ideas, and plans. No details, just thinking REAL big. Problem is, you could waste hours trying to talk some understanding into them, or you could just make up some 100% complete BS excuse to get them off the phone. Now, I'm not saying, but I'm saying. Dig?

You've gotta do your homework. Sometimes that means more than just asking random people on internet forums.

kraynakadon, thanks a ton. thats basically what i was trying to say while touching lightly on all the ideas he had.

go on over here

http://www.driftmechaniks.com/forum/vie ... &start=165

I touched on the subject that you were asking about.

Look I'm sorry that I decided to do a little research into how to make my $6000 count for horsepower. I asked because I didn't know I figured people that have rx7 or Rx8, fellow rotary fans would know. I know that you Kouki7, are working on a new engine. I know you have done research into what gets you the most bang for you buck. Look I don't want fight with anyone or piss people off especially fellow rotary fans. I did a lot of work and calling around to many different companies to find out what would work best. And as far as the BS factor goes, when someone is going to be spending 6000 or more at your shop there not going to bull shit you. They want your money. Like I said the options I was thinking of I have looked into I just want to peoples opinions on what would work best. But you have all give me some good input; right now I am looking into the 13b-rew motor out of the FD to replace mine. Opinions are like assholes everyones got one. Every once in blue moon there worth wild opinions.

DO NOT rape the RX-7's heritage and convert it into some muscle hog. I had been thinking about a V8 swap for my FOERST gen, but then I thought..."What the HELL am I thinking??" and snapped myself outta that real quick.

What are you planning on doing in your car primarily? Drift? Touge? Auto-x? It's easier to make a decision based on the application of the car.

Mainly drifting, but I would like to be able to kill all the cockbites in the v8 mustangs, preludes, and integras. So ya drift, and scare rice.

PAINT IT WHITE WITH A RED SUNS STICKER, dammit!!!

believe me, a shop will BS you just to get your money! i've seen it done lots before.

you're right about my project. i've done over a year of research and learning (some the easy way and some the hard way). this motor i'm currently putting is the 3rd motor that the car will have had this year alone. why? simply cuz i learned a valuable lesson the hard way by not rebuilding my TII motor before putting it in the car. all i'm trying to do when i sound harsh is get my point across to you since i know how much it sucks to have shit go wrong. i've found that being harsh is the best was to get a point across. i'm not "mad" at you at all, just dont want to see you posting in a few months that whatever your plan is, went wrong and now you hate rotaries cuz of it.

in the end we all love cars of all kinds and everyone is looking out for each other in one way or another. my way is kinda harsh but i mean well by it.