Gas mileage

[Reapersgbodys]

Well guys,
I’ve put quite a few miles on the T since I got her back on the road. Numerous trips north to see my father, who’s been on the ill side for quite a while. So, I did a show a couple weeks ago, and thought the gas gauge was acting up, so I started REALLY keeping an eye on it, to my dismay, it’s working fine.
So started tracking my gas mileage, HOLY S&$T, was I a bit surprised, pulling 32+ on the highway!!!!!!
Just finished another run north to see pops, 437 miles on 13.5 gallons of gas, 32.37 MPG, the only thing that I did this year so far to affect mileage is the RJC power plate, I don’t know if it’s a fluke or not, but last year, trips to see pops, I was only getting 23, it was 1 1/4 tanks round trip to see him, have done 3 trips since the power plate install, and each trip, 437-440 miles, 3/4 of a tank.
The Power Plate, at these gas prices has already paid for itself, one of the best mods I have ever done.
Don’t know if it’s a fluke with my car or not, but after 3 round trips, and money saved, I couldn’t be happier!!!!!!!!

 

[rag231]

Are you sure that you don't have the dual tank model? That is pretty good ( great) mileage. I can't keep my foot out of it long enough to get a mpg reading. If you've noticed, not much talk about gas mileage here on this forum. I wonder why??

 

[Reapersgbodys]

Are you sure that you don't have the dual tank model? That is pretty good ( great) mileage. I can't keep my foot out of it long enough to get a mpg reading. If you've noticed, not much talk about gas mileage here on this forum. I wonder why??

Lol,
Not the dual tank model, notice, that’s Highway mileage, not much call for getting in it rolling 70 down the highway!!!!!
I just surprised me that my highway mileage changed that much with the Power Plate.
Yes, I do agree, MPG isn’t discussed here, because it’s a mute point with our cars, it’s kinda hard to keep your foot out of it!!!!!

 

[michael evans]

What do you have for a ECM ?

I have the FAST unit so I can see a reading in my dashboard tab the reads "MPG" and need to take a long trip in it to see how accurate that reading is.

BTW I also have a power plate on my engine.

 

[Reapersgbodys]

Just have the factory ECM with TT 5.7 chip.
They are just leisurely drives, not a lot of foot in the pedal. I don’t get nearly that when I’m in town, because can’t keep my foot out of it, lol

 

[Turbo6inKY]

Just have the factory ECM with TT 5.7 chip.
They are just leisurely drives, not a lot of foot in the pedal. I don’t get nearly that when I’m in town, because can’t keep my foot out of it, lol

Leisuerly at what speed?

Gas mileage drops greatly past ~65mph because of drag. If you're putting along at 55mph on a bone stock car with a 5.7 chip, what you're reporting is possible.

But another possibility is your tires are too small or something is up with your odometer and you're logging more miles than you're actually traveling.

 

[rag231]

I remember reading a Car Craft magazine back in the late 90's ( maybe 96 or 7) where they were having one of their street car shootouts. It was where they put 6 cars thru all of the paces and there was a white 87 T Type with some 5 star rims on it that averaged 41 mpg on the cruise. Everyone was shocked. I believe the owner had stated that he had the Accel DFI setup that had the dials on it and had reduced the injector duty cycle down to like 40%, I don't think that you can go a mile per hour over 55 but he proved that it could be done.

 

[gsgnnut]

No way man. I've done a number of highway only road at 55 with cruise and even then 24 mpg max was it. Sumpthing ain't quite adding up here?

 

[Reapersgbodys]

Math don’t lie, 437 miles, 13.5 gallons of gas used, equals 32.37 mpg, 3 round trips to see my dad, after each trip, fill up, 13.5-13.7 gallons to top it off.
Odometer is reading correct, didn’t run it down the road screaming, took my leisurely time 60-65 on the trip.
Tires are the correct size.
I don’t nearly get that if I’m getting into it or running 70-75 down the highway,
It’s a much nicer trip taking the scenic route up north to see pops anyway.

 

[whitehot1]

Great gas mileage!!! Enjoy it.

 

[Coach]

Mine pulled 830fwhp at Richard Clark’s a few years ago and gets 24mpg with the Cruise on.

 

[michael evans]

Just with quick math I went 75 miles with 5 gallons as a first test.

Will do more testing I already found one issue.

 

[gn-intercooled]

My dad has always kept track of gas millage since the day his GN was delivered new. I recall well in the late 80's he regularly was averaging 7.8 L/100km, which works out to 32 mpg (US gallon). When the ATR Pitbull chip went in it increased to 34 mpg. I never even got close to that! But being a teen at the time ..... should we expect an differently

 

[TType85]

In one of my cars I had a Thrasher chip that got 34mpg driving it easy on a long road trip. Surprised the hell out of me because normally it was much lower since I beat on it a lot.

 

[Frederickdav]

That is great mpg. I took my T out for a nice drive this evening and promised myself not to get on it. Absolutely no boost! Ya right! I made it until almost home and I needed to change lanes and the nice folks in the other lane didn't want me to get in front of them and I took off kind of fast at a light and I heard a familiar squealing noise coming from the rear tires and I looked at my boost gauge and it was 10+. I think I blew it.

 

[captndave737]

That is great mpg. I took my T out for a nice drive this evening and promised myself not to get on it. Absolutely no boost! Ya right! I made it until almost home and I needed to change lanes and the nice folks in the other lane didn't want me to get in front of them and I took off kind of fast at a light and I heard a familiar squealing noise coming from the rear tires and I looked at my boost gauge and it was 10+. I think I blew it.

Black Crack. The only way I can not get on it is to keep it in the garage.

 

[Reapersgbodys]

I only pull that mileage when headed to see pops, it’s a long slow cruise, no need to get on it, now driving around town and light highway driving, not even close.
The whole thing is, I only installed the RJC power plate this year, and was happy that I was able to justify the money spent, and garage time with my “baby” to the money saved to the wife, definitely made life easier for a day or so, LOL

 

[michael evans]

After a test I got 14 MPG with the ACs so the E3s got almost 10 MPG more, but the performance is better with the ACs

Maybe with a little more tuning with the E3s, It may start easier.