I've been told from a more-or-less reputable source that there is enough space to get a custom 26B 4-rotor put into a 3rd gen. Have any of you done this? Is there enough room for a turbocharer (although you wouldn't need it since it's at already like 600HP)? What would something like this cost (i'm guessing between 7000-10,000$US).

thanks for ur info.
peace

 

I seriously doubt you can fit a 4-rotor in the FD without some modification to the engine bay or firewall/driveshaft.

Fitting a 20B is a job in itself.
To do it properly requires the firewall to be cut back some and the drive shaft to be modified as well.
There is some information available on the web, but not too documented since most of the people doing these engine swaps make money by offering services for it.

The Petit 20B kit requires the spindles to be exchanged and as a result, bump steer after you relocate the steering rack.

So, I doubt a 4-rotor will be a simple fit.

$10k is a very underestimated budget.

I estimated $8k for my 20B project at one time.
However, the FD already had everything for the transplant (FMIC, aftermarket ECU, etc).

Hope some of what I wrote helps.

J

 

.....plus the cost of the car. Find another project.

 

Try adding another zero to that guess... then doubling or tripling it. That is if you could even find someone to do it - what is Jim Downing up to these days anyway?

[Rant] People, what is up lately with all the ricockulous engine swap questions? Is the potential of a stock 13BREW not good enough? Did everybody come over from the Nissan/Honda forum where you swap engines like underwear?

The R26B is a friggin custom race motor, funded by a major car manufacturer to run at Le Mans ... 10 years ago. Its not something your cousin Pepe can slap together in his garage and drop in your ride for a couple bucks. This is like someone on the Ferrari forum asking if the (Type 051) 3 litre V10 in the F2002 Formula One Ferrari will fit in their Modena. [/Rant]

 

Most of these people who keep asking about big engine swaps are the ones who end up totaling a stock 255hp FD because it had too much power for them.

 

well you got the insanity part right.....

 

I think the one from the Mazda Lemans car goes for about $100,000.

 

You can get a "26B" for about $7500. Not a true "26B", but it will have more power than most know what to do with.

The cost of the rest of the conversion will really eat you up.

Start small, once you have learned enough about the stock two rotor in a FD, consider a move to a 20B. If the 20B works out, then you can move on to a 26B.

Here is a link to a spreadsheet that covers some of the costing with the 20B. Everything here will be required, in addition to much more.

https://www.rx7club.com/forum/showth...744#post568744

To do a 26B RIGHT, I don't think that $80,000 is too outrageous of an estimate.

 

I totally agree with you. The beauty of the Rx-7 (aside from looks and performance) is the fact that it's one of the only cars ever mass-produced with any engine type other than piston. 20B and 26B are okay but a V8, V10, V12, come on!

My $.02

 

Yes, your estimate is way low. Either your Bill Gates and have plenty of money to drop on a project that will take more time than the car will run or you are just asking for the fun of it. I think questions on engine swaps are better suited for the lounge or the 20b area of this forum.

 

I can't speak for the majority here, but I for one don't have a problem with a 20B conversion. A 26B is just a little too insane of a jump for someone that has not done a 20B conversion.

The 20B conversion provides a lot more torque than the 13B-REW and has a lot more HP potential.

 

Everyone's on the rag today.

 

don't think you can't buy the 26B, it is probably custom made for their sole proprietary racing purposes. and for one man to try this project is probably impossible. A team of smart people can probably do it if they have a multi-million dollar budget for funding the researching, engineering, experimenting, testing, and some money for that team of smart people to pocket, since they are greedy. Yes, then it would be possible, ask the dudes at mazda who made the 26B.

 

my mechanic was saying he's going to do it next year, but I don't know if he's still gonna do it, but I guess he's got some source and he knows that 26B fits in the 3rd gen but you need change the subframe AND cut the firewall.

just a guess.

 

Acquiring the 4-rotor engine (custom built, but not the exact LeMans racecar engine) will probably be the easiest part of the project.

*Multi-million??? When you're the first, the pioneer, I can understand. The engine has been done and there are variations out there (far less in quality). Do people understand what a million can fund these days? Geez!

Fitting it in the engine bay and balancing it will be difficult as well as the engine management system.

The driveshaft and tranny will definitely need some modifications.

I would at least ask around about 20B conversions to get a good idea of what you're trying to tackle. You can get generic information from Petit or Peter Farrell (of course, they're going to sell you their solution). I found that if you get pass the rough side of Tito (Alamo Rotary), he loves to share about his 20B conversions. There are several more on the way in San Antonio.

Good luck,
J

 

you know what? screw the 13b, 20b, and 26b. I remember the batmobile from the batman movie, and that thing had a jet turbine. I have a friend in the Air Force who can get me one cheap. if I slightly mod the firewall and the air separation tank, I can also run a T66 turbo and a 250 shot on nitrous. Beat that. Its a projected -1.2 seconfds in the quarter mile....yes, negative. Plus, I own an illegal whitle slavery ring so I can have it done for about eight dollars in labor.

Im sorry, but this just seems so ridiculous to me. Yeah, maybe you could do it, but the time? work? cost? and what you can do with a good 13b for a fraction of that?



sorry, I just finished dealing with some boost issues in my FD that are nowhere near solved, and I am waaaay grumpy.

 

the 787 lemans 4 rotor is a mid engine car for a purpose "TRACTION"unless you want 200lbs of led in you trunk find a better way to spend your money and time


(sorry if i come across to harsh )

 

wow! i never reallypost as much as i have been reading since i became a member but this was an outrageous thread. not to be mean or come off as some *** hole but slappin a le mans race motor from a multimillion dollar supercar into a factory street purpose built car is a feat not even GOD himself could achieve..haha. IMO not that any of you guys really give a whoot but 20Bs are already a little overkill..

 

thanks you for killing my youthful optimisim (a.k.a. drug filled euphoria).

 

Anyone who would undertake this project would have to understand that it is not about balance. This would be mainly for straight line performance and to have the badest rotary powered RX-7 on the street.

No matter what the car, someone always has a "need" (desire) to put a bigger, badder engine in it. That is a fact of life.

If I had the time, the funds, and multiple 7s, I would really consider a 26B.

 

I don't want to bust your ***** - but you are smoking crack if you think you can get a 4 rotor engine for that kind of money, even for just the core. Do you understand that almost everything will have to be custom made? The 26b was not a production motor you can just buy from Japan and rebuild. It has to be built from scratch by hand. Someone will have to design things like the eccentric shaft, then custom fabricate it so it can withstand the sick amounts of power the engine will make. How many tries do you think it will take to get it right? (Ask Mazda how many motors they built in an attempt to get the R26B to run for just 24 hours at a time.) Then you need to design and build all the manifolds, etc. etc. etc. Ask LaBreck how much it costs to make a custom high performance intake manifold... there goes your $7500 on just that one part - assuming they get it right the first time. I'm not even going to tell you how much the necessary transmission will cost. And I don't think even the 26b rotor housings are the same - e.g. the 787 used 3 spark plugs per rotor, had ceramic coatings on the rotors and side housings...

I'd say that amount should be sufficient for a 20b to be done RIGHT. And I still haven't seen that yet. But that is another thread for another day.

 

ask some of the guy on the board that are in japan, ibet it has been done

 

it would kick some ***

 

You make too make ASSumptions. You can use existing housings and rotors (modified). Keep in mind that I made a distinction between a "true" 26B and what you can reasonably build. If it is NA, it is less complicated than a turbo for the intake and exhaust, but I wasn't including all of the components, I am talking about the block. No ECU, no ignition, etc. Although I am no expert, I have done some research and do have a source to get a "26B" for about $7500. PM me if you want the info.

I have also researched the 20B conversion for the FD. I think that you can do that "right" for about $45K. Depends on what your version of "right" is. I am talking about a conversion that will not result in cutting into the firewall and will not result in steering geometry issue, no negative impact in handling...in addition, a single turbo and VERY modified drivetrain.

WHAT do you care anyway? You were against any conversions earlier in the thread.