I do all my own welding/ machining and is something I wanted to learn while taking the project on. Drop a stock one in and you almost have double the hp and fuel efficiency for the cost of a 12a gasket kit and a bit of time. Seems like everyone who wants one still has a boner for a shift buzzer.lol only kidding but my fuck are you ever ignorant. It's down to personal preference like I said, didn't feel like each persons preference should have been debateable.

BT

Don't start a debate or I'll have to invite you to race lol. Scratch the fuel efficiency comment. I could watch the needle go down under full throttle in my old 12a but if you guys are saying your getting in the 20 mpgs then heck, your doing quite well.

what ya need is some piston power! :-)

(gluten free)

20 MPG on a modded NA rotary.

I'll take that bet ALL day long and twice on sundays

How is stating a fact being ignorant? Anything nissan that begins with "RBxxxx" is boy racer territory and $$$ for speed parts. I can't tell you how many nerds with Nissan Skylines I talk to on a daily basis that dont know dick about their own car. They just spend 1400 dollars on cams here, 900 on a header there, few thousand for stand-alones, and the obligatory 3k bucks for wheels and low profile tires for that "stance". They just know the engine name, and that it is a wet dream for teenage boys who think Skyline>All

I'd rather not have ANY point of reference with that crowd. Not saying you are one, but you cannot deny the following those cars/engines have.

And I didnt knock the swap, you just called me ignorant because I hit a soft spot with the boy racer comment.

I'd ask you to recant it, but I really dont care. You will spend more money swapping to a different engine entirely and hacking up a perfectly good car than you would rebuilding your rotary. Plus, you would probably like it better than a bland datsun 6 banger IMO.

I do it everyday, so you'd be broke before sunday even comes, lol.

maybe at an optimal rpm on the highway, letting off on the exits etc you might do it. I alot of it has to do with how you drive the car.

hell I can get 4mpg better than my wife driving the same car!

but to realistically say average city/highway and not babying it or dogging it......getting 20mpg . i'd happy lose that bet. even the brand new ones can't say that. they get like 16-17 mpg. why do you think the rotary is dying?

Firstly, I run 4 bbl's that allow me to push my AFR's far beyond what even fuel injection can muster and still run properly on my primaries for cruising, which is most of my driving. The benefit of the 4 bbl is having a second half of the carb jetted for power and the rich fuel mix that rotaries need to make peak power. So, its like having 2 different carbs. One for sipping gas, the other for going like stink. Its surprisingly efficient.

Secondly, were talking about the 12A. They got better MPG's than the most recent renesis back in 1982. And that was while they were choked with 3 cats, and a myriad of emissions equipment.

The 12A is a good, and overlooked engine for daily use and reliable performance. You just cant think you're the stig and floor it everywhere. On my last tank of gas, I cruised at around 90 mph for *hours* and had my foot deep into my secondaries screaming through lanes and even a few times breaking 120 mph on the empty freeway. Still got 17 MPG on that tank. Lol.

If you drive with some sense, and stay within in the speed limit and properly tune your shit 20 mpg average is easy. I have been pushing my own farther and farther on each tank with intelligent jetting choices...

yeah, I know how 4 barrels work. I have never had a 12A, just a few 13B's. That said. my build now has a holley 650. I have not even started the engine yet, so jetting is a little ways off. Can you recommend information or tools I might use to make sure I am getting peak efficiency and the right jets?

i've taken my Rx8 on a couple of longer trips recently, and mileage has been fine, actually. last run was 23.9mpg. mileage also appears to be better at 75mph than 65mph. it is true city mileage is bad, but it is gas MILEAGE, so when it take me 30 minutes to go 2 miles to work, gas mileage is going to be bad in everything, as i'm not going anywhere.

my SA, which was completely stock, got 23mpg round trip on the ~1000mile sevenstock journey, 2 years running.

Oops my bad thought you were talking hwy total ...Hey if you can post the carb type and jetting to help out all us idiots that give perfectly tuned carbs away!!!....Boy that was a very very hard way to learn a lesson...but it was definitely learned!!!:blush:

Your as ugly as your are ignorant lol. I was fully prepared to set "facts" to rest but I'll be the bigger man here and say you are absolutely right 12a>rb20. 100% cheaper 100% more power etc.

Bt

I come to this forum to read about rotaries, not boingers.

Hilariously enough, I didnt claim either of those "facts". But 90% of the time i'd argue getting a 12A running in a car that was designed to have one in the first place is easier than ripping it all out and throwing something else in.

But hey, what do I know? Some guy called me ugly on the internet! As for the bigger man argument, try harder.

I think we all need to stop and calm down.

Why stick with a 12A? You can work out fuel mileage and decent reliable hp. Thats an upside to these little motors.

Rb20 i know nothing of it and i feel like maybe ppl should not talk about pistons is it a good engine sure but not here.

Why should anyone spend money on a 12A well as as far i have seen and experienced alittle more reliable then 13Bs sometimes you can workout quite some power with just the carb and some exhaust mods. Do they have tons of HPs no way but thats the fun of it making slighty faster with what you've got.
Hell do a port job to maximize power if you do it just right you will be smooth going for days if your looking at something like an aggresive bridgeport to a simple street port. Why not spend money on a 12A?

Buy arguing guys forget it wether he would rather have a 12a or a bugatti engine is not up to us but us just being able to suggest why he should spend on one. If there will be arguments its probably better to stop posting in the thread.
I like seeing useful post that i can learn from not people bashing on each others age or intelligence.

So lets all hold hands or something make up like the french do with a kiss on the cheek or something like that.

You could do what i just did. I built a 13b using turbo2 irons (which are strong and 4 port) and s5 n/a rotors. I kept it stockport, however the ports are larger than n/a. I just wanted a strong, reliable, peppy engine. Oh then i powder coated it chrome.


Where people screw up longevity is the pursuit for more and more power. The turbo.

nice engine.

Although I have never done a turbo, even a highly modified 13b can be fickle.

thats why I chose the boinger route. when you want 400hp your pushing your luck from a reliability standpoint

and even pulling 225hp out of an NA 13b is gonna be an engine that likes to scream and does not have much bottom end. i.e. streetability

to each his own. I would rather race a rotary though. Love those high rpms. my last one would shoot flames out the back when running her hard. only know because someone told me one night when they were behind me. very kewl

Wise choice. My buddy is putting a 416 ls stroker in his fd. He got tired of worrying if and when shit was going to hit the fan.