So, how much of a PITA would it actually be to try and put a renesis into an FC?

 

read the FAQ at the top of this forum....

here i will help you...

Can I put the RX-8 engine (Renesis) in the 2nd gen?
Well, technically yes. But it is not a simple bolt-in swap. The Renesis uses different mounts, and an entirely different ECU and wiring harness. Anything can be done, but this is much more complicated then swapping any 2nd gen engine into the car. Lots of fabrication, wiring and other things must be done to support this engine. It is generally easier (and probably cheaper) to swap in the 20B three rotor, or the 13B turbo from the Turbo II.


Brian

 

i beg to differ. renesis engine will need new mounts, and a stand alone. also the exhaust will have to be redone, but other than that, its prettystraight forward. plus a 3 rotor job will cost greatly more than what a renesis will cost. remember, it has to support a 3rd rotor in the ems.

 

A 3-rotor is also signficantly cheaper to buy dude. Plus there is pre-made mounts and plenty of aftermarket support for 3 rotor in the EMS world.

Also look at whose going to make more power ^_^.

 

Let's start by...

How much are you getting the RX-8 engine, trans, ECU, and wiring harness?


-Ted

 

But, why? There are far easier way of getting 170-190 rwhp,..

 

wouldn't the renesis have a much longer potential life, and generally be a more reliable engine?

 

Slower engines are typically more reliable. :p

The Renisis would be more reliable as it is newer, however the power output is far less and the power potential is MUCH less than a 3-rotor. The claims that a Renisis would be cheaper is a larf, the Renisis is an expensive engine to get ahold of, not to mention the various parts required to make the swap happen. The 3-rotor, while still expensive would be more cost effective and greatly more affordable when looking at $/hp.

As mentioned already, what are the specifics on your budget, do you already have the engine? What else do you have, what are you planning to do?

 

I thought the Rx8's Renesis put out WHP in the 200 range?

 

not from what I've seen.......the re-flashed ECU RX-8 in RX Tuner only made 190rwhp...

The big thing is how many Renesis' are out there right now?(to be purchased in the trim to install in another car) very very few. And the ones that are are going to be priced higher because their new and, well, there isn't many so they can basically name their price.

But aside from acquring one the bigger question remains - what do you plan to do with this car? or get out of this motor?

If you just want something reliable and in the 190-200whp range, a 1/2 bridged N/A w/standalone will do that much cheaper and still be reliable.
If you just want to do it to say "my FC has a renesis" then, well, there's no deturring you - haha
If you want something to get more than 200whp, again a TII motor on fresh rebuild with lots of boost will do that reliably and cheaper to boot.

What Im getting at is from a financial point of view, the ONLY possible reason anone would consider this is just to say "my FC has a renesis" (which isn't a bad reason don't get me wrong, it just means you've got money to burn - hehe)

 

hmm... ill have to ask my dad but i think he only paid 2500 for his renisis short block. then again its a short block and when all is said and done it will be more expensive. But we need to fab up a supercharger anyway so no need for the stock intake.
(engine is for plane use not car)

 

Well, your dad got lucky. There aren't thousands of Renesis engines just laying around.

I'd like to see that engine break 300-350rwhp, too..rofl..

 

Mazda dumped a couple hundred of the first production renisis motors due to issues with seals, and construction... sure its not one of those???

 

You still need the stock ECU and the main engine harness.
That 3-stage intake has to be controlled by the stock RX-8 ECU, so that's not easily replicated.
I'd figure you'd also want that 6-speed transmission too?


-Ted

 

Wayyyy more then it's worth IMO.

 

Im laughing at the kid who thinks the 20b swap is cheap.

 

I think people were saying that a 20B swap will most likely be close to the cost of the Renesis swap......so why not have the extra rotor for your $8,000+?

No one on here is going to argue thatt a 20B swap is cheap.....unless they're comparing it with a Rolls Royce 727 jet engine swap - haha

 

727 Swap is sweet.

 

just going to use standalone since the intake will be custom fabed up.
no transmission, the prop is directly drivin off the engine.
going to use a supercharger so that at crusing altitude the engine will be geting the same amount of air as a stock renisis at ground level.

Im not shure if its one of the first engines i do remember it has 0 miles on it.

 

No reduction gear? You going to use a variable pitch prop or something?

 

Wow. So many replies. I didn't expect the attention. Haha.

BTW, I did read the damn FAQ , <edited for flaming> I'm not a retard. <edited for flaming> you'll realize the fact that it doesn't actually answer the question in detail. I didn't ask "can I put a renisis into my rx-7?" I know I can, in reality, almost any engine can be put into any car, give or take. I wanted to compare. I asked how much of a pain in the *** it would probably be. I wanted details.

You see, I expected to hear "just do the three rotar swap"

I expect it because i've already heard it a hundred times. Yes, I know the damn 20b is sweet. I've seen it done.

I was curious if anyone actually HAD used the renesis, in anything really.

All in all... I just wanted to see what people would say, and I have now.

And yes, it had crossed my mind that ... yeah, I could say "I've got a renisis in my FC."

This is nothing 100% serious, no hardcore planning. I usually refer to the herd before I set my goals. I'm just keeping my mind open for ideas and opinions. I know I can mod my FC, and I know I could make it fast, with enough dinero. But I think I don't want to do what everyone else does. For example, if I ever do forced induction on my 13b, I won't go turbo. Everyone goes turbo. I've seen what a turbo can do. Although I know in the long run the turbocharged would be better, I'd still be curious to see what a supercharged 13b could do, personally, I haven't seen it done.

It's also nice to know I might be able to supercharge a renesis. What set up are you going to use?

 

Skyminded, No flaming... your post has been edited. We do not accept that behavior here. If you feel you must talk that way, please find another board to participate on.

 

We tried to offer our input on the potential challenges -- albiet the 20b suggestions were given as the cost would be similar and the challenge lower... it wasnt meant to belittle your idea. The Renisis is a nice motor but at this point in time, looking logically at the initial costs, time costs and costs of modification potential. The 20B, 13B-T and 13B-RE are all more effeciant when looking at those three aspects.

The only Renisis swap I've seen so far was a very clean SA22. They swapped the entire OEM setup from the accessories to the wiring and ECU, they even used some of the RX-8 interior peices (although that aspect was somewhat crude IMO).

Good luck with your project, take things a little lighter and be sure to posts lots of pics of whatever you decided to do.

 

variable pitch prop is correct, as for the supercharger setup no idea yet. Im sure my dad has something in mind but we need to finish up the body before we do the engine.
ok just asked my dad about how much he paid, its was 5500 rebuilt with new seals for avaition use.
it was a guy he knew that got one of those first low use test engine for 200 shipped from some place in australia.

 

that is a quote from my previous post. it clearly states that it is a very large pain in the butt to do the swap. it also states what has to be done to do the swap.

also if you wanted to know if anyone used the renesis in any swap, please ask that next time and i wouldnt respond in that way.

thank you icemark for being a great mod. keep up the good work.