Gas mileage, what you getting?

N.RotaryTech · 07-08-2008, 07:40 AM

In my '89 GTU, (S5 mild port n/a, with RB mufflers an presilencer, emission's removed, AC components removed, aux sleeves an actuating rods removed, vdi open, heat-shielded cone air filter, 1/2oz. per gallon premix.) usually the range is from 18-25 MPG.

But with the latest tank, I got 27.6 MPG! Which is the highest I experienced in this car.

On a regular day, the breakdown is probably...
With city driving, I get about 18-20 mpg.
Hwy & city, I get 20-22 mpg.
Out of town RX7 meet or out of town trip, I get 22-25 mpg.

But the latest tank I did, out of town trip, and hwy & city driving.
Averaging 70 mph on the hwy.
And got 27.6 mpg.

Someday...30mpg...someday.

Phoenix7 · 07-08-2008, 11:47 AM

I'm getting 18-20mpg city (15mpg on good days) and up to 25 hwy.

Intake, RB header, midpipe and HKS 52mm catback. Pineapple Aux. sleeves, SAFC (tuned to 11's = ~ 150rwhp), no premix, Avg 75mph.

Good numbers BTW. 30 MPG seems doable.

vex · 07-08-2008, 12:02 PM

I'll post up my stats once I'm back on my home comp.

RETed · 07-08-2008, 02:12 PM

Right about 14 - 15mpg strictly city driving...
It'll creep up to about 17 - 18mpg once I start jumping on the freeway more.

13BT
ported
stock turbo
stock IC
11 - 12psi
Haltech E8
240hp at the wheels on a Dyna Pack

-Ted

My5ABaby · 07-08-2008, 03:08 PM

I stopped keeping track a few fill ups ago, but before then...

Date : Gallons (mpg)
5-07 : 9.241
5-18: 10.656 (17.6426)
5-25 : 9.501 (20.1031)
6-05 : 11.754 (18.4618)
6-25 : 11.030 (15.9565)
7-15 : 8.806 (14.3084)
7-31 : 11.516 (15.4567)
8-08 : 6.922 (16.4692)
8-11 : 2.808 (17.094)
8-12 : 4.707 (24.4317, all highway for a test)
8-25 : 10.294 (16.4173)
9-01 : 11.080 (19.0433)
9-10 : 10.928 (19.5827)
9-19 : 5.603 (13.03)
9-28 : 12.584 (17.244)
10-12: 10.604 (17.9178)
10-22: 10.342 (18.3717)
10-31: 10.603 (17.3536)
11-10: 10.301 (19.1246)
11-20: 10.685 (19.905)
12-14: 10.493 (15.0103)
1-05 : 11.228 (11.7549)
1-13 : 7.912 (25.63)
1-30 : 9.124 (15.7825)
2-21 : 9.529 (15.1117)
3-03 : 10.598 (20.664)

Average mpg : 16.9949

That's probably 65% city. S4 N/A with wired open 5/6th ports (haven't got around to fixing that).

vex · 07-08-2008, 04:56 PM

Here's my MPG from 12/07-6/08
10.84969789
11.08811354
22.46897453
20.78227049
24.25531915
21.83933766
23.01381693
11.44400786
10.89867579
21.60533911
22.88592867
14.04095422
14.97948527
23.05433732
18.46236312
23.56626861
24.09230769
21.86765989
24.55517241
22.7091272
23.39853301
22.44504111
23.33252876
23.8468854
24.26514697
20.70511886

MaczPayne · 07-09-2008, 12:37 AM

I get about 18mpg combined, 22 on the highway.

s5 13bt + stock turbo
12psi + stock IC
RB turboback
MT LT8-s
~230whp

classicauto · 07-09-2008, 03:17 PM

all hwy driving without opening the secondaries I can get slightly over 20mpg (roughly...I'm converting from Km's) but when I'm denting the floor with the loud pedal its closer to 10

But it (was) fast as a scared monkey.

FirstRotaryExp · 07-09-2008, 05:25 PM

Avg'ing right around 20-24mpg on a stock block with out emissions running a RB header/presilencer and a straight pipe into a cheap ebay muffler, SAFC with about 10% fuel knocked out at idle to -4% at redline(still need too actually tune it better), an intake leak of some kind, either a gasket or one of the lower injector grommets, no ac/ps. And average MPH is 80+ during interstate travels and 60ish around town. 1-2 gear is always redlined before a shift, and sometimes 3rd as well. But i hope to better my numbers soon with a better CAI, instead of the cone on the end of the intake tube in the hot bay. Car also has an FD alternator an a ford escort Efan. Still need to get around to getting a cleaned/flow tested set of injectors installed and tidying up things but its driven everywhere I want it to go.

88turboii · 07-20-2008, 08:12 PM

Quote:

Originally Posted by N.RotaryTech

In my '89 GTU, (S5 mild port n/a, with RB mufflers an presilencer, emission's removed, AC components removed, aux sleeves an actuating rods removed, vdi open, heat-shielded cone air filter, 1/2oz. per gallon premix.) usually the range is from 18-25 MPG.

But with the latest tank, I got 27.6 MPG! Which is the highest I experienced in this car.

On a regular day, the breakdown is probably...
With city driving, I get about 18-20 mpg.
Hwy & city, I get 20-22 mpg.
Out of town RX7 meet or out of town trip, I get 22-25 mpg.

But the latest tank I did, out of town trip, and hwy & city driving.
Averaging 70 mph on the hwy.
And got 27.6 mpg.

Someday...30mpg...someday.

I call BS, brother.. i bet the gas pump was not calibrated right. the best ive seen is 24.5 which was mostly crusing at 60mph, i usually get 16 mpg city. rtek 2.1

BLKTOPTRVL · 07-21-2008, 11:54 AM

Quote:

Originally Posted by 88turboii

I call BS, brother.. i bet the gas pump was not calibrated right. the best ive seen is 24.5 which was mostly crusing at 60mph, i usually get 16 mpg city. rtek 2.1

I've gotten 26-27 in all hw driving in my vert. It is possible.

RETed · 07-23-2008, 05:28 PM

Quote:

Originally Posted by 88turboii

I call BS, brother.. i bet the gas pump was not calibrated right. the best ive seen is 24.5 which was mostly crusing at 60mph, i usually get 16 mpg city. rtek 2.1

I've gotten calculated 28mpg, and it should've been more like 30mpg cause I didn't drain the gas tank all the way down.
The trip OD hit 400, and typically fill-ups were about 13 gallons - you do the math.
Since I was doing such long distance driving, I wasn't going to take a chance and drain the gas tank that low - i.e. the fuel-low warning light never came on.
If I really wanted to push it, the car would've easily hit 30mpg.
This is driving between Sacramento, CA and Las Vegas, NV 100% freeway at speeds of 60mph to 80mph, just under the point where the secondaries kick in at 3,500RPM.
Back then it was stock ECU (well, reprogrammed G-Force unit) with full exhaust on a 1987 Turbo II.

Side note, I was able to hit 200 miles on a 10 gallon fill-up's.
I only fill up 10 gallons at a time, and it makes calculating mileage easy now.
Still tweaking the Haltech E8...

-Ted

'89gtusman · 08-30-2008, 06:18 PM

im getting about 20-25 between city and high-way 13b non turbo. oh yeah does anyone know where i can get a drive shaft with replaceable u-joints

Scooter · 09-16-2008, 07:37 PM

On average I'm getting about 9/10mpg in the city. about 24 on the highway.

Thats with running excessively rich.

My5ABaby · 07-20-2008, 09:05 PM

I believe 27.6 all highway. I get 24 mpg all highway and that's on an untuned N/A. A good tuning on a TII that stays out of boost can hit that. Now whether or not he actually got it, who knows. But I say it's possible.

07-08-2008, 07:40 AM	#1
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC iTrader: (0) Posts: 552 Rep Power: 17	Gas mileage, what you getting? In my '89 GTU, (S5 mild port n/a, with RB mufflers an presilencer, emission's removed, AC components removed, aux sleeves an actuating rods removed, vdi open, heat-shielded cone air filter, 1/2oz. per gallon premix.) usually the range is from 18-25 MPG. But with the latest tank, I got 27.6 MPG! Which is the highest I experienced in this car. On a regular day, the breakdown is probably... With city driving, I get about 18-20 mpg. Hwy & city, I get 20-22 mpg. Out of town RX7 meet or out of town trip, I get 22-25 mpg. But the latest tank I did, out of town trip, and hwy & city driving. Averaging 70 mph on the hwy. And got 27.6 mpg. Someday...30mpg...someday. __________________ '89 RX7 GTU, half-Bridge-port S4/S5 NA, E6K, Full RB exhaust, weekend warrior. '83 RX7, The "this might take awhile" project. '87 RX7 GXL, Rest In Pieces. '98 Subaru Impreza Outback-sport, rx7 rescue vehicle, down for repair. '94 Ford Ranger, daily.

07-08-2008, 12:02 PM	#3
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. iTrader: (6) Posts: 2,113 Rep Power: 19	I'll post up my stats once I'm back on my home comp. __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group

07-08-2008, 03:08 PM	#5
My5ABaby Sigh..... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (6) Posts: 2,377 Rep Power: 19	I stopped keeping track a few fill ups ago, but before then... Date : Gallons (mpg) 5-07 : 9.241 5-18: 10.656 (17.6426) 5-25 : 9.501 (20.1031) 6-05 : 11.754 (18.4618) 6-25 : 11.030 (15.9565) 7-15 : 8.806 (14.3084) 7-31 : 11.516 (15.4567) 8-08 : 6.922 (16.4692) 8-11 : 2.808 (17.094) 8-12 : 4.707 (24.4317, all highway for a test) 8-25 : 10.294 (16.4173) 9-01 : 11.080 (19.0433) 9-10 : 10.928 (19.5827) 9-19 : 5.603 (13.03) 9-28 : 12.584 (17.244) 10-12: 10.604 (17.9178) 10-22: 10.342 (18.3717) 10-31: 10.603 (17.3536) 11-10: 10.301 (19.1246) 11-20: 10.685 (19.905) 12-14: 10.493 (15.0103) 1-05 : 11.228 (11.7549) 1-13 : 7.912 (25.63) 1-30 : 9.124 (15.7825) 2-21 : 9.529 (15.1117) 3-03 : 10.598 (20.664) Average mpg : 16.9949 That's probably 65% city. S4 N/A with wired open 5/6th ports (haven't got around to fixing that). __________________ 1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles Community Service Manual RotorWiki "Imagination costs nothing; we could build square locomotives or fly to Mars" - Felix Wankel Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."

07-08-2008, 04:56 PM	#6
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. iTrader: (6) Posts: 2,113 Rep Power: 19	Here's my MPG from 12/07-6/08 10.84969789 11.08811354 22.46897453 20.78227049 24.25531915 21.83933766 23.01381693 11.44400786 10.89867579 21.60533911 22.88592867 14.04095422 14.97948527 23.05433732 18.46236312 23.56626861 24.09230769 21.86765989 24.55517241 22.7091272 23.39853301 22.44504111 23.33252876 23.8468854 24.26514697 20.70511886 __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group

07-09-2008, 12:37 AM	#7
MaczPayne Bah! Join Date: Mar 2008 Location: Riverside, SoCal iTrader: (1) Posts: 442 Rep Power: 17	I get about 18mpg combined, 22 on the highway. s5 13bt + stock turbo 12psi + stock IC RB turboback MT LT8-s ~230whp __________________ Johnson TA FC in the works!

07-09-2008, 03:17 PM	#8
classicauto crash auto?fix auto Join Date: Feb 2008 iTrader: (0) Posts: 816 Rep Power: 17	all hwy driving without opening the secondaries I can get slightly over 20mpg (roughly...I'm converting from Km's) but when I'm denting the floor with the loud pedal its closer to 10 But it (was) fast as a scared monkey.

07-09-2008, 05:25 PM	#9
FirstRotaryExp Rotary Fan in Training Join Date: Feb 2008 Location: Dandridge, TN iTrader: (0) Posts: 76 Rep Power: 0	Avg'ing right around 20-24mpg on a stock block with out emissions running a RB header/presilencer and a straight pipe into a cheap ebay muffler, SAFC with about 10% fuel knocked out at idle to -4% at redline(still need too actually tune it better), an intake leak of some kind, either a gasket or one of the lower injector grommets, no ac/ps. And average MPH is 80+ during interstate travels and 60ish around town. 1-2 gear is always redlined before a shift, and sometimes 3rd as well. But i hope to better my numbers soon with a better CAI, instead of the cone on the end of the intake tube in the hot bay. Car also has an FD alternator an a ford escort Efan. Still need to get around to getting a cleaned/flow tested set of injectors installed and tidying up things but its driven everywhere I want it to go. Last edited by FirstRotaryExp; 07-09-2008 at 05:31 PM..

08-30-2008, 06:18 PM	#13
'89gtusman sick89gtusfc3s Join Date: Aug 2008 Location: new hampshire iTrader: (0) Posts: 3 Rep Power: 0	im getting about 20-25 between city and high-way 13b non turbo. oh yeah does anyone know where i can get a drive shaft with replaceable u-joints

09-16-2008, 07:37 PM	#14
Scooter Oh noes. Join Date: Sep 2008 Location: New York iTrader: (0) Posts: 1 Rep Power: 0	On average I'm getting about 9/10mpg in the city. about 24 on the highway. Thats with running excessively rich. __________________ 1987 RX7 SE [swap car] 1979 Pontiac Trans Am 6.6L _____________________________________________

07-20-2008, 09:05 PM	#15
My5ABaby Sigh..... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (6) Posts: 2,377 Rep Power: 19	I believe 27.6 all highway. I get 24 mpg all highway and that's on an untuned N/A. A good tuning on a TII that stays out of boost can hit that. Now whether or not he actually got it, who knows. But I say it's possible. __________________ 1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles Community Service Manual RotorWiki "Imagination costs nothing; we could build square locomotives or fly to Mars" - Felix Wankel Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present." Last edited by My5ABaby; 07-21-2008 at 07:41 AM..