I was interested in this swap since I saw that white FC in Hawaii. The F20 is an awesome little motor. Owners on the s2000 forum are starting break the 400rwhp mark everyday on stock or mildly modded internals. No one knows the reliability yet with doing so, but I imagine it can't even come close to a 400rwhp rotary and it's problems.


Give us an update when you can.

 

Ok, for an update:

Well, I just finished school for the summer, so now i should have some time to work on it. I just recently had the engine out and put the clutch in. The great thing is that it takes about 20 min to get the engine out, so service is a snap! Now, I need to get the engine back in and hook up fuel, coolent, and electrical and it should be running.

I'm going to use the rx-7's stock radiator because its a really nice unit. the Problem is that the inlet and outlet on the radiator is on the opposite side... Well, i guess that its not too much of a problem, but i want to make things look nice.

As for fuel, I might be able to get away with the OEM rx-7 fuel pump as well. The S2000's injectors are 320's or somthing, and the rotary engine had 440's if im not mistaken. Goes to show how inefficient the rotary is...

 

looks nice. I don't really approve of you down talking the rotary so much, with in capable hands it's a very nice, and reliable engine. but if you want to swap, then it's none of my business

F20s are really nice, my brother has an s2000 with a comptech supercharger on it, and it'll probably give my TII a run for it's money when it's done. it'll probably be able to beat me. the comptech unit adds about 100 _wheel_ hp which is nice, when you finish and after a while it gets boring again, I suggest that

it looks nice, I hope it all works out.

 

sorry for coming off as down talking the rotary, I am a fan of those engines. I did look into both a 13b-re swap and a t-II swap. The problems are that both of those engines are really old, and if i got one, theres no telling the conditon of the engine untill i tried to start it. And then what would happen if it needed to be rebuilt? or was blown and had a torn up housing?

With s2000 engine, i ran its VIN and also know the fate of the car it was in.

 

Let's see the pics.

 

bout time for some more pics heh!!! :smiley_12

 

OK, hold up. I'll take some next time I'm over there. Really not to much more to see just yet since we (my bro and I) are still working on the wiring. But I did get the cooling system hooked up and I did mount the s2000 underhood fuse box. This wiring is not exactly plug and play, its basically a giant rats nest that we are sorting out, you can imigian the fun!

We are wiring it up in such a way that it uses the normal rx-7 ignition switch. I was thinking that i was going to need some stand alone button, but now we got it set up so we can just use the normal key!

Its looking good under the hood. But in the car it looks hideous! No dash and wires everwhere! I took out the AC system, which i dont think was a big loss since it was so weak and I never used it. But i do want heat and a vent, so i somehow have to redesign the system with out the AC box in there. Like I said, I'll get pics ASAP.

 

just take the ac box under the dash, gut everything inside of it, and put it back. it weighs maybe a pound and acts as a perfect little tunnel from the blower motor to the heater core.

 

I cant really do that because the center of the firewall is gone and the heater box cannot go into the exact location because theres some engine in that spot now. It may still fit in that general area, but its going to be back a little so i cant connect it with the old AC box.

I really havent looked at the problem yet since I have been working on other areas. I'm sure its not going to be much of a problem.

 

Did my TII swap and I'm into it 2700. I applaud the effort and time you've spent on the car and doing this conversion. But you might as well rip all the mazda and rx7 badges off of the car and paint a big honda symbol on the hood because a RX isn't a RX without the ROTARY ENGINE DAMMIT! But oppinions are like ******** and every one has one. I just get really depressed and start looking for the razor blades whenever someone has rapped and violated something as beautiful as a RX7......it's so sad!

 

Hey, instead of giving him a load of your inferiority complex, and trolling his thread, why not ask mazda why they still cant make a rotary with a BSFC worth a ****?

 

Hey, come on now. I never said the rotary is inferior. Never said it was the best engine around. Never said the S2000 engine was a bad choice. I happen to like the S2000. Nice car, nice engine. Like I stated opinions are like ******** and everyone has one. While others were sharing theres I shared mine by simply saying (maybe a little aggressively, sorry about that) that I would rather see a rotary engine in a RX then anything else.....so back off me. Sorry to clutter up the thread and sorry for my opinion. Once again I applaud the conversion as it will be only the second one if I read right making it unique and something to be proud of. Best of luck bro.

 

hey good to hear of your progress!

can you move the heater stuff to behind the glovebox?

I moved my Logicon to the glovebox by extending a dozen wires but I bet there is space there to relocate the entire blower motor and vents and tubes if you dont have the space in the center of the dash anymore from the new motor.

awesome awesome project. that 6 speed is gonna be so silky smooth you will be stoked.

if you want better acceleration, its as easy as a shorter gear swap in the rear end of your FC. Mazda has several options for you too, since its a common upgrade for the **** poor powered nonturbo rotary powered FCs, just swap out the rear gear on the diff to something like a 5.0 from the 4.1 and your car will freakin RIP!

I went from something like a stock 4.2 to a 4.9 in my old GSR swapped Civic and it was incredible at how much torquier the car felt with just the change in final drive, amazing stuff and very simple, well relative to a complete turbo setup and tuning and the related expenses.

more pics! details! pics of the mounts! gonna have the S2000 cluster in there?
what wheels/tires are you gonna run?
suspension mods?
thoughts on the interior?
keep it simple and get it up and running!

 

I agree opinoins are like ********...everyone has one bla bla bla. Then again some people themselves are just ********.

 

You've yet to explain to us why we should keep the rotary in our RX-7's beyond an emotional attachment to the car, or that's what the manufacturer put in it, in the first place. Engine swaps are as common place as stripes on the road, and have been going on ever since cars were first put on the road. What makes the RX-7 exempt from that? We're just trying to make our beautiful RX-7's even better.

 

It's just my opinion and how I feel. I like the rotaries ok. I wasn't tryin to be a *******. If I knew you all would get so fired up I woulda kept my mouth shut. RX7s are not exempt from engine swaps. The only cars that are exempt from swaps are the ones that are owned by people that don't want to do them. I've already applauded his swap allright. Do you want me to apologize for stating my opinion. Fine I'm sorry. Didn't mean to be an *******, didn't mean to knock his work. I sure as hell didn't mean to fire everyone up. Now can we drop all this and give the guy his thread back.

 

Someone calls him a homo and I get ripped, OK

 

Just relax. Go for a spin in a V8 RX7 and smile. 87 octane never felt so good.

 

Hehe, not in an F20C!

 

actually, honda says it will take 87. I guess it just retards the timing so it will run. But they also say you wont make optimal power with it either...

 

You're comparing the EFI systems of vehicles manufactured 20 years apart... And they are 460's btw... Not to mention, there are only 2 of them working below 3800 RPM's, and Mazda designed the N/A's to run overly rich in order to idiotproof them... Lean out the mix a little and you'll gain a few HP...

As for the conversion, it sounds like you have decent reasoning behind what you are planning, so best of luck to you!

 

bump for update.

PS: guys leave the idiotic comments out of this one so some of us can actually learn.

 

For a little update:

Ok, I haven't been doing much work on the car lately. I just got back from a vacation, but I have been doing work on making a new dashboard that can hold the s2000 gauge pod. Also, the OEM dash weighed around 50lbs and the new one is going to be significantly lighter.

I totaly wish i could afford to go with a stand-alone computer for the engine, there is just a huge mess of wires in the car. Nothing that cant be delt with but its just going to take time... somthing i dont have a lot of.

 

I dont care what anyone says... Im a rotary lover and have been dealing with them for a bit... Anyone that says that they are efficient is just denying the fact...

 

I do agree, comparing systems so far apart isn't fair. The fact that they have different injector sizes means exactly SQUAT about efficiency, or inefficiiency. Factory turbo DSM's run 440's stock. You are comparing engines that don't even use the same principles for strokes, intake/exhaust methods, or even lubrication (since we were naming awesome features). The rotary is extremely efficient, and maybe the reason it uses bigger injectors is to supply enough fuel for the added air it's capable of flowing because of it's design. And it lacks so many flaws of a piston engine: valvetrain, more rotational friction internally, or a cylinder head to hinder flow. Although, for modifying and tuning this can left a little something to be desired, less variations of engine builds i would say, and less ability for "anyone" to be an engine builder. You can't throw parts at a rotary engine in the same way...alright, i'm done.
HULK