Thanks for all the great responses guys. I will definitely post some pics/info here when I get this done.

 

I still don't understand why you want a 4-Rotor. Even the people with 3 rotors say that they are scared of their cars...

IMO it would be a waste of money unless you are using it for marketing purposes. In otherwords, other than driving it.

Good luck bro,

Nice rides by the way.

 

the 4 rotor in his car isnt *just* a 4 rotor, it is a MAZDA R26B...a REAL one

 

I second that motion. Heath is right on the flaming. what purpose does it serve? has always made me question the social intelligence of the people talking all the ****. just keep it to yourself. 4 real. I understand people perpetrate but thats them. this forum cannot thrive and grow if people are always hatin'. period. its old. if you got that much anamosity, go watch wrestling or something and stay out of other peoples business. that's what's up.

I hope he does get the 4 rotor going. then he can pave the way 4 more to be done. sky is the limit. that's probably why he has three of the baddest cars on the planet. doesn't take no for an answer. get it done and add another accalode to your resume.

 

It seems to me the real advantage of having a four rotor would be the fact that you could make a lot of horsepower naturally aspirated. I know you can do this with a 20b as well, but all the better with another rotor. Scoots car made about 500 n/a horsepower right? I'm very interested in building a four rotor engine some day. Mating two 13b's together seems like it would yeild the most power.. So you would need to get machined: e-shaft, maybe motor mounts. Custom made: exhaust manifold, intake manifold, a new subframe, anything else? With the 13b end plate it could mate to the stock tranny. My question is, what ecu could control it. Maybe two seperate ecu's. I think an n/a four rotor setup would be pretty reliable. There wouldn't be much stress on the engine, definately compared with a 500-600 hp 13b. I'm other people with more money are interested too, right on edmo7

 

Here's some more information on "that guy"...

https://www.rx7club.com/v-8-powered-rx-7s-299/anyone-considering-v8-conversion-kit-grannys-140838/

 

If I remember correctly, the scoot 4 rotor had 2 Apexi power FC's.

Personally, I'd make a 4 rotor mating 2 Renesis motors. I would think that would be ALOT cheaper!! If you ever look up the prices on items for the Renesis (rotors, housings, ect.) you'll see that they are alot cheaper, by like several hundred dollars!! There are also several pluses to the Renesis, first of all its cheaper, lighter components, and makes more power then any other n/a rotary released by Mazda. Besides, if someone made a 4 rotor from the Renesis they'd be the only ones for quite some time I'm sure. I'm sure thers a Haltech, or Microtech stand alone that could run a 4 rotor without a problem.

-Alex

 

That's an interesting idea TT RX7...using Renesis engines.....when I get in contact with Scoot, I will definitely present that option to them and see what their response is.

One of the main reasons I want to get the 4 rotor in the RX-7, is because of the exclusiveness and uniqueness of the conversion. It's just plain Awesome!

 

If you really want somthing interesting, use the Renesis engine to make a 4 rotor, and slap it in an Rx-8. I don't really like rx8's but it would make a real interesting project.

-Alex

 

edmo7, did they say on the website where you got those pictures what kind of lights those are? those things are sick.

as far as everyone here flaming people for ideas, personally i think it boils down to people having too much damn time on their hands and/or being pissed that someone might just be able to have something that they will never have. as far as you owning the Ferrari, and (possibly) the NSX (i say possibly, because i think you do, from the statement about not wanting to get flamed anymore), did you buy these cars new or used? what everyone here doesn't realize, is that if you buy an early to mid 90's NSX, they're between 25 and 30k, and a F355 is about 40k. someone in their mid-to-late 20's, without a wife/kids/big house, and a kick *** job can afford stuff like this. it'd be like someone around this age going out and buying a real nice ski boat, a few jet skis, and a couple of snowmobiles. don't hate on him for having different priorities than you.

whoever talked about programming the CNC machines to make the machines, why do you need a programmer anyway? right now i'm at Michigan Tech, and in my IDM (integrated design and manufacturing) lab, we have to design a part on I-DEAS and machine it on a CNC lathe. I-DEAS generates the code for you, so why do you need someone to write the code for you? with a program like CATIA or (although it's becoming out-of-date) I-DEAS, you can design your parts, assign the type of material you will be manufacturing it out of, and run FEA (finite element analysis) on the part before you even make it, to see if it'll hold up to your specifications. i agree with you that you need a very precise, and large CNC machine to make these custom parts, but why do you need a programmer when programs will generate the code for you?

the idea of using a renesis is (in MHO) is the best route to take. why distroy older parts that are getting harder to find if something goes haywire? the new parts from mazda are gonna be around for a while, because rumor has it that the next miata will have a less-powerful version of the renesis as an engine option (information from Motor Trend, sneak peak at the new miata). mazda has neither confirmed or denied these rumors, so it's a possibility.

edmo7: if you do get this conversion done, i only have one suggestion for you, overbuild everything in the car. rip apart your tranny and have your gears magnafluxed, shotpeened, polished, and then cryotreated, have custom syncros made out of brass, do everything you can to keep your drivetrain in one piece, because a NA rotary, as long as it's tuned right, won't give you very many problems, it'll be the rest of the car that will try and rip itself apart with the horsepower and torque that you'll be producing.

 

Is it really all your cars??

Owned the 7 since you were 16 back in 1994?? Now you are 26??

Few things don't add up.. but what ever you say..

Jim Downing has 10+ 4 rotor N/A engines.. He told me they are approximately 100K each.

All uses Inanetti 2 or 3mm ceramic seals and all built by Rick.

I believe they make 600HP each.

I don't think scoot 4 rotor is the way to go.. Especially the cost and etc.. but of course.. you could sell your F355 and fund this project.

I'm about to do 20b project and started to collect parts.. i recently bought my 2nd 20b engine and already getting my manifolds worked on by David Garfinkle. Engine will be completely built and also slightly ported. Cost is going up.. and its not cheap.. I think after the engine is built, just on the engine, I'll have 5-10k in without the cost of the engine and turbo.. I'm hoping to make 700-800HP.

 

Again, thanks for all the advice....but I think I've heard enough analysis of my age and my other cars. Let's just please drop that subject. Sell the F355, no way! That thing is just amazing to drive.....it makes the most insane exhaust note...amazing.

 

Yeah, what would your dad say when he found out you sold his car?

 

you guys are too funny.......I think my dad would say, "that's too bad...JimLab's wife LOVED getting rides in the 355...."

 

Wait, I take that back....Maybe JimLab isn't even married, or maybe he has a girlfriend. If that's the case, substitue "girlfriend" in the place of "wife" in my last posting. But then again, JimLab might be a Loser and not even have a girlfriend...if that's the case then substitute "MOM" in the place of "wife" in my last post......get the point JimLab...I'm trying to say that YOU are a LOSER....

now how does that feel? I never said one thing to you, and you've flamed me TWICE....get a life moron. 9000+ posts on an rx7 forum.....man....

 

Hahahaha ^

jimlab the only reason why i posted the link to granny speed shop was because it had some info on the 4 rotor engine he made.

what was the point of your post

 

Right On!

 

Um, OK.



Giving him ****?

 

Maybe something has changed over the last few years but in my conversations with Downing and Engman years back the 4 rotor has less capacity for hp than the 3 rotor. The problem is the overly long eccentric shaft in the 4 rotor flexes too much at the extremes of power. They can produce more reliable normally aspirated hp but when turbo charging is allowed it's not the best choice, even ignoring the cost factor.

The motors Downing has are all PP as well I beleive which makes them unrealistic to ever be used in a street car near a populated area.

What's the big deal about a used Ferrari anyway? It costs less than a new Audi A6, I don't see people making a big deal about A6's hehe. Don't worry about what other people have whether it's true or not. For sheer entertainment I'd wager it is probably made up, primarily on the basis of some of the language used, such as "u" in place of you etc.

 

Not to even BEGIN to say I have as much knowledge as Kevin, but I was thinking the exact same thing as him: If e-shaft flex is an issue on 20Bs, and they already had to upgrade the shaft and flex/backing plate, what about a 4-rotor? The idea sounds great, but I just don't see it being the "best" option. But hey, if that's your dream/fancy, do it man. No limits...

As for everyone else on the forum, I just really think ppl are just crazy jealous, plain and simple. Like I said, I know several ppl like yourself, but most are younger. I grew up w/ ppl who's families are in fact royalty, including the son of the Prince of Saudi Arabia. I've had kids (16, 18) roll up in brand spankin new BMW 850s and the like...and when it gets in an accident, he buys a Yukon "for the time being" lol. There ARE people like that, and there's no reason to hate on others who may be more affluent than yourself. It's like it's their fault for being rich? WTF..give it a rest guys. Not EVERYONE on the forum is broke and strugglin to keep their FD running...

Oh, and I didn't hear anyone ragging on David Hayes, who dropped 35 large on his Pettit 3-rotor project. What gives?

EDIT: I take that back, someone DID rag on him for being "less" of an FD owner because he paid for it and got it done, vs. trying to do it on his own, and taking 2 years plus