I just want to know how to get the best gas mileage possible. Im going to clean the fuel system and change the spark plugs. What can i do with the way i drive. I know not to accelerate hard but what rpm is the best to shift at. I heard as long as it doesnt go over 3800. Please help!!

 

Don't pass 3800 rpms for the secondary injectors to come on, and if possible, lean out your AFRs, FCs normally run rich especially if you have an open intake and exhaust.

 

1/4 throttle , maintaining a consistant amount of throttle , speed and rpms, letting off the gas instead of hitting the brakes etc, not going above 3800 rpm where the secondary injectors.transition as said

parts /tune up- new o2 sensor, spark plug wires, air filter , spark plugs, fuel filter , oil change/oil filter , verify timing , adjust tps to spec

Rotary > Pistons

 

are you for real with this question?

just drive like a vagina- problem solved.

 

the best way to get great gas mileage in a rotary is to not get on. my fd only gets like 15 mpg

 

hall of fame thread.....

RX-7's with rotaries don't get good gas mileage..... bottom line.

 

Yep, my response as well. I get you're trying to get the best gas mileage possible, so all the advise very valid. Especially keeping the 2ndaries from kicking in. But if your going to drive a rotary as a daily (which I do and have done for many many years), it's about trading the satisfaction of good gas mileage for the satisfaction of a increased driving fun factor.

Every time I see someone claiming they constantly get 20+ MPG, my universal response is their getting a false reading as they need to get their speedometer fixed or their rear tires are undersized diameter.

 

for real- my vert when it was NA would get 20mpg, once taking it really easy on a good highway run I think I squeezed like 22-24 out of it but that was rare

16-18 with combined city/highway was the norm

 

You need to alter your stock response.
I've been getting @20mpg in mostly city driving and just yesterday drove 1000 miles straight through from Denver to Chicago...averaged 29mpg during the day and 24 at night with the lights up.
(To allay any doubt, my speedo is almost dead accurate, confirmed by police radar and also the mileage traveled...I've made this trip several times and the trip is almost exactly 1000 miles door to door. My odometer this time showed 998 miles, so I'm very sure of my data.)

I'd say the best gas saving strategy is not drive with the headlights up.

 

Alot is due to the very rich fuel map on these cars made as a cushion, if you can lean it out and still run safely it'll get better MPG.

Rotary > Pistons

 

It doesn't burn ANY gas on top of a Flatbed truck..

 

The flatbed is then at that point , prolly not getting every good MPG.either unless its a diesel

Rotary > Pistons

 

and ten to one..that Flatbed gets better mileage than what the car ON it was getting before it got busted!

 

 

Get out and push it :p

Or buy a piston dd...

 

Well, that's probably because it's downhill all the way from Denver (the mile high city) to Chicago (the windy city) with the wind behind you and your jib up.

Maybe all the Midwest winter road salt has eaten away your floor pan and you're using the Fred Flintstone technique for your around town driving?

Being serious:
3.9 or 4.1 rear end? Average speed estimate on your 1,000 mile run?

I also did a non-stop cross country trip albeit from LA to Dallas and back in the S4 TurboVert. Also a couple runs from Dallas to New Orleans (they sure know how to tail gate at LSU) and back. Never got better than between 16-17 mpg all highway. Although I'll also say that, except for the portion between El Paso, TX and Midland where the legal limit is 80mph I didn't spend a lot of time below the posted limit.

 

I run a S4 clutch pack LSD, I believe it's 4.1 ratio.

My worst segment of the trip fuel-wise was right at the beginning.
I left at 2 am, so lights were up and in CO I'm comfortable running above the limit (75 posted), so the fuel consumption was 22.4 mpg.

CO drivers are favorite targets (nicknamed "greenies") of the Nebraska and Iowa State Patrols, so I was much more careful and adhered to the limit (+5mph, usually) for the rest of the journey.
Through Nebraska I got 27mpg and in Iowa/Illinois where the limit drops to 70, she got 29 mpg.
The whole trip took exactly 15 hours so I averaged 67mph.

I still have @ 2000 miles to go (including another 1000 mile run back to Denver from Chicago), we'll see how the fuel consumption goes over the long(er) haul.

 

A well tuned standalone combined with careful driving habits. 30+ MPG highway easily.

In town mileage will always suffer due to overlap, combustion shape and low VE in vacuum. Howeer it can be significantly improved with a well tuned standalone.

 

Let's not over-think this.

Tune it up, leave it bone stock, make sure the tires are full, and shift at around 3500 r's.

 

On a trip (interstate driving) I easily get 24-25 MPG at 70+ MPH all day long. With the cruise on and going under 70 it can get as high as 26-27 MPG. I've logged over 350,000 miles on RX-7's since 1987. Keep you lead foot out of the gas, make sure it runs right. Around town shift when the shift light tells you to.

 

Hey kinda new to the forums still. I am looking to replace my nikki on my 12a with a standalone, thinking Holley? Then leaning the mixture way out perhaps adding a turbo just to increase the compression slightly. Doing this in order to jack the MPG way up and I don't care about emissions

I was thinking keeping 2 carbs handy one stock/able to pass smog and one... not so passable - also remove/replace the Cats whenever I need to smog the girl.

anyone have possible links for build threads/suggestions throw me a PM I am of course using search that is how I happened across this thread.

 

even a honda civic pulling your 7 would probably get better gas mileage than it can on its own, buy another car if your mileage is that big of a concern.

 

having owned every year and model Rx7, i can have some mileage info.

while the vert is hands down the best FC, it also gets the worst mileage. my testing revealed that a stock vert will do 25+ on the freeway, but 12 around town, so the mix of driving is very important.

in the vert, its 90% city, so i'm somewhere between 14-18mpg
my 87 GXL, which got a better mix, would get 20mpg.
the T2 would average around 18.
the 3 rotor did 20mpg highway, 15-16 mixed, and single digits if you touched the gas pedal.
the FD 20-22
79 Rx7, with reactor, 23-25
81-85 12A, 20
GSL-SE, 22, 26 on the freeway.

 

Dont by a rx7 if you are worried about gas milleage!lol!
My fd swapped big turbo standalone FC pulls like 22 on highway and around 14 city driving and that is driving normal keeping up with traffic and boosting a little,if i smash the pedal then forget it.Single digits are possible if i beat on it!
In other note i wont be able 2 drive like grandma watching rpms worried about my secondaries kicking it and all this other crap just 2 save gas.If i want 2 save gas il get a prius not a rx7.

 

Thing is without primaries the car is dangerously slow, lol