has anyone done this or heard of this?its a novel idea with
far less weight and the same horespower.

 

but you forget that the horsepower comes at about 9k rpm and the torque is no where to be found. sure it's a novel idea, but I bet you would be greatly disappointed at the result.

 

Same as what? Below 7K rpm my starter motor makes more torque.

 

but a roatry can produce 250 horespower easy,granted they dont have piston torque, but the weight savings should be very bennificial. you could have high end v6 power and almost
60% less weight on the front end. that wouldnt be enough?

 

again, back to the no torque argument. so what if it has 250 hp at 7k+ rpm, it also has about 100 lb-ft of torque at the same rpm. in a car as heavy as a thirdgen, you're going to be revving the **** out of it just to get it rolling.

and where do you get 60% weight savings on the front? if you think you're going to save that much weight you're full of it.

 

maybe,,just maybe, if you do the twin turbo thing it may work, and add some of that weight back to the front.

Then you have the rany to deal with, and a custom driveshaft.

Fart cannon is mandatory

 

well how much does an iron block v6 or v8 weigh? and
your biggest rotary is only 2 liters which is smaller then my iron duke , the average rotary is just 1.3 liters,maybe 150 pounds.
and yes you can get more then 200 pounds of torque and 350 hp out of
a rotary and they can be built to red line at 20,000 rpm.

 

I say do the swap. Anything is an upgrade over an Iron Puke 4cyl. It's never been done as far as I can see, so you'll be forging a new path.

 

its not puke its DUKE. its built out of tanks and nails.just because it doesnt suck gas or spin the tires doesnt mean it isnt a bad motor. reliabilty counts for alot.

 

Hahaha, he's defending the pos 4 cyl that should have never made it into an F body.

Go ahead swap the roturd motor into your thirdgen, i'd be glad to pick on you with my "heavy" small block.

 

yeah more power and less weight never won a race. i guess every car manufacturer and anyone who knows anything about cars is wrong. man i was stupid for thinking a super light engine with the same hp as a v8 would be fast. thank you for correcting me.

 

Have you ever even looked at the weights of those engines fully dressed as it would go into a car? maybe looked at why guys with the RX7's go to small blocks ? They arent half as lightweight as you think.

Secondly those things really do make jack **** for torque, and you would have to extensively modify one to make similar numbers to a bolt on LT1 or LS1, at bare minimum needing a turbo setup, intercooler, etc. And you still wouldnt have a setup that is very reliable.

 

You'r right, what makes it a crappy engine is that it doesn't get as good gas mileage or make as much power as most other 4cyl engines, and it weighs more.

If you love the ol' Iron Puke, then keep it.

 

Just slap in one of those 500hp ecotech 4bangers & be done w/it.

 

but i dont want or need 500 hp 200 will do just fine.
id settle for 150 realy.

 

Your really going to be wasting your time and money on this. the weight savings will not make up for the lack of torque or low power output. I am not sure what you want to accomplish with this setup. Is it just for the novelty or do you really think this is going to be something worthwhile, beacause I think you really be disappointed in the end. There is a reason you haven't seen this setup before.

I am not trying to make you feel bad in any way or call you an idiot. Your think outside the box and that is a good thing, but this has the recipe for disaster written all over it. Save your money for a nice small block and you will be much happier in the end.

 

The last thing you would ever, ever want to do is put that rotary in anything heavier than an Rx7. I had one and it has nooooooooo ***** below 3500-4K, after that it rips but the wait will kill you. I could not imagine a rotary in a thirdgen, the DUKE will smoke it left and right. Unless your willing to put maybe 5 to 1 gears or better in the rear end it will be the slowest car ever. With those gears you might keep up to a DUKE. If your serious about a rotary look into a 3 rotor from a Cosmo, twin turbos and actual low-end torque, but for the money and work it would take to do that you could build a small block that would embarass Z06s.

 

but i dont like v8s, they just dont do it for me.
i prefer 4bangers, but i dont like hondas and stuff cause they sound retarded and are realy expensive. but maybe i will just build a super duty duke instead.

 

My old girlfriend had a 79 rx7. I showed her how to drive it. "floor it, shift at 7k, it drops to 4k on the shift, repeat". The engine lasted 6 mos. Go for it, stick it in there, and post your 1/4 mile times. I would also suggest some gears, like 4.56 or up. Because you're gonna need some help to get that heavy pig to move with no torque.

 

That would be cool to build a nasty DUKE. Im not sure what they make for making the engine stronger but if you could make one that would run like 20 lbs of boost that would be wicked cool! If your dead set on something different look into the 3 rotor, they sound really cool and are ballsy for 2 liters. The only thing that would suck is all the fabrication you would have to do but if dont like V8s then it would be a more than worthy project. You could also look into a V6, 2.8, 3.1 or 3.4 and turbo it, look up Doward, he makes a turbo kit for the 2.8/3.1 that, from the sound of it is a very nice kit. But for sure stay away from the 2 rotors for a thirdgen unless its built big time, even still the rotary is a kind of delicate engine, especially with the stress you would be putting on it by moving a 3500 lb car. Rotarys can rip but they take a lot of money and knowledge to have it be reliable and fast, those two things usually being of mutually exclusive unless you really have experience with that unique engine.

 

7k? Thats right in the meat of the power band, you have to keep going past that but careful after 8k cause you can get rotor to housing contact, which is very bad. I beat the living crap out of my 84 for 3 years and I finally killed it by running into the side of a honda accord when this girl pulled out in from of me. Man loved that car, best one I ever owned (except for the lack of torque). How did you like the 7k buzzer?

 

Putting performance considertations aside (I can't beleive I just wrote that, but....)

Engine mounts, transmission mounts, custom driveshaft, adapting your clutch and shift linkage to the Mazda tranny, wiring and computer, front end accessories, fuel system, custom exhaust, etc, etc.

Think it through. Think it ALL the way through.

 

best post in this thread

 

 

i hear diesels are what's hot now a days

now there is some torque of ya

 

I think it is:

the torque of a diesel is inversely proportional to the torque of a rotary!!

 

Put a Cummins in your car.

 

i'd slap a 6600 duramax

310HP @ 3000
605lbs ft @ 1600


thats enough to put a smile on my face



deisel in a camaro... that's rediculous, but would be a lot of fun

if i was rich thats the first thing i going to do

 

Okay, enough is enough. Just like the electric motor driven accessories, build it first and then come back and tell us all about it.

With pictures and quantifible data to back it up.