[A418t81]

Originally Posted by FLTreeTirdy

Has anyone else experienced this... gas millage has gone down the crapper since we put this thing in... and this is with driving like a grandma... i really don't like spending 80 dollars a week on gas .. someone please help me :sad0147:

Its called you driving the car harder now. The JB does not add any fuel at all until you are well within the boost. There is absolutely no change that occurs while the car is cruising, or under light amounts of boost for that matter.

[leftcoastman]

Originally Posted by remydlc

+1 If you one more power, guess what, more gas consumption. there is a little exception here, since this engine are TT, but hey dont expect improve at all if you dont want surprises.

Shiv can chime in, but my understanding is that during partial throttle cruise conditions, timing is advanced, resulting in better fuel economy.

I can attest that my hwy mpg went up after PROcede.

I don't think the more power -> more gas consumption relationship is that simple. My old VW got the same mileage as a new 328i and I can guarantee you that the latter is much more powerful.

[sflgator]

I always use my Paddle Shifters in DS mode, so I'm always in M1-M6 (even while cruising on the Hwy...I'm in M6). I get 16-18mpg City / 23-25mph Hwy. and ~ 19-21mpg mixed. Yesterday, I took a 200mi. business trip on the Hwy. I was getting 24.5mpg on the Hwy. After I got off and drove in the City a bit, my mpg dropped to 23.7mpg. Still not too bad, considering I have PROcede v2.

[bigboyzben]

Originally Posted by leftcoastman

Shiv can chime in, but my understanding is that during partial throttle cruise conditions, timing is advanced, resulting in better fuel economy.

I can attest that my hwy mpg went up after PROcede.

I don't think the more power -> more gas consumption relationship is that simple. My old VW got the same mileage as a new 328i and I can guarantee you that the latter is much more powerful.

Judging from the A/F ratios from dynos of the various piggybacks, I would say that you get better mileage from the PROcede because it runs LEANER than stock and the other piggybacks. 17:1 for PROcede vs. 12-14:1 for the others if I recall correctly.

Also, the PROcede runs lean during cruising which is a reason you see "limp" modes. Running lean will generally net you more power, but you're also more prone to detonation!

-Ben

[sflgator]

Originally Posted by bigboyzben

Judging from the A/F ratios from dynos of the various piggybacks, I would say that you get better mileage from the PROcede because it runs LEANER than stock and the other piggybacks. 17:1 for PROcede vs. 12-14:1 for the others if I recall correctly.

Also, the PROcede runs lean during cruising which is a reason you see "limp" modes. Running lean will generally net you more power, but you're also more prone to detonation!

-Ben

This is incorrect. PROcede makes the 335i run richer during boost, although it may run leaner while cruising (no boost).

[dpeterson]

before the jbs2 i got 20.6mpg, that is about a 50 50 highway / city. I usually go about 80 on the highway. city some spirited starts. Now i get 20.4mpg. I use 93 octane as well.

I also skip gears a lot, on on ramps i'm usually going 80 in 3rd, hit 4th even out, then over to 6th.

dave

[e.n335]

13 mpg town
23 mpg highway

The power has to come from somewhere.

PROcede V2

- Eugen

[Rugs]

In a recent trip in the e93 loaded down w/luggage, my Wife & I drove to Tybee Island from Atlanta and got nearly 26 mpg w/JBS2. Averaging 85-95 mph with some triple digit runs.
Im happy with that considering how much my foot was in the throttle...

[bmwzimmer]

Stock
Local 16
HWY 26
Mixed 20

Procede V1.4X
Local 15
HWY 26.5
Mixed 19.5

[Raz335]

I ghhave to agree with the OP. Since I got the JB2, my MPG has gone down. I'm averaging 17.5 now. I'm not sure if it's because of the heavy right foot from the JB2 power or becasue of the JB2 itself. Either way..it has something to do with the JB2

[sambonator]

My mileage went from 16mpg overal to 15.6mpg overall with JBS2. But I do 95% "city" driving. It might be because I like to feel the power of JBS2

[mesier1111]

Originally Posted by Bimmer335i07

There is no way that you can get 400 miles on a tank of gas with a mix of 50% highway and 50% city. Unless, you're driving at 60mph on the highway 100% of the time.

I get around 18mpg with spirited driving. If I drive like a grandma with mixed driving, I get about 22mpg.

NO B.S., that is about what I get with mixed driving of 50/50.

[Cadillac Johnson]

Swap out the twins for a big single turbo.

Then stay out of boost.

Watch the MPG climb.

[RokX]

I'm getting ~22 mpg with 1.47, I'm pretty satisfied.......

[Spool]

We have high performance cars, why do you care about 1 or 2 MPG drop?


If my car got 12MPG but it's an absolute beast on the road, i will not care...


anyone else agree?

[e.n335]

Originally Posted by Spool

We have high performance cars, why do you care about 1 or 2 MPG drop?


If my car got 12MPG but it's an absolute beast on the road, i will not care...


anyone else agree?

+1

PROcede V2 delivers around 420 hp / 530-550 nm ( crank numbers ). Relative to the power / torque output the engine is very efficient. E. g. do a comparison with the e39 M5. Did somebody really expect to get much more power without consequences on milage ? Sometimes it seems to me that ppl should think a bit more about what they are doing / writing.

- Eugen

[Driver72]

With my PROcede, my gas mileage has pretty much stayed exactly the same as it was on my stock car...driving spirited much of the time (DS mode 60+% of the time) and I've been getting 19-20 mpg in mostly city driving (65% + city driving).
I consider that excellent fuel mileage for the power the PROcede provides.
I believe under light foot driving or cruising the PROcede will give you better than stock gas mileage.

And yes, timing WILL affect fuel consumption.

[TheLegacy]

With my PROcede and exhaust my gas has gone down a lot... its called sppppeeeding in the city

hehe

and its to much fun, can't drive slowly anymore

[grkm3]

Originally Posted by Beer Goggles

I average 22mph with JB1...timing control has nothing to do with MPG...use your right foot.

Anytime you add boost you add fuel, which means you use more. If you really cared about MPG you would have bought a 328 or left it stock.

Thats now true at all.Not to diss the JB because it does its job and its priced well but the jb adds fuel to control knock.

on a timing controllable setting you can retard timing to not get knock and use the same amount of fuel.I actually got better gas mil with my shark injected M3 because the map actually leaned out the fuel and used a little more advanced timing to get a few more ponies out of it up top.

[OC Guy]

Originally Posted by NYCGarbagePrince

Please for the love of god tell me you didn't buy a software tune with the only intention of getting better gas mileage. Not to mention it should be assumed that when your ecu is being tricked into injecting extra fuel due to your jbs2 it will tend to use more gas. Only logical recommendation is to drive less. Or remove it.

Is the JBv2 really a "software" tune?

[A418t81]

Originally Posted by grkm3

Thats now true at all.Not to diss the JB because it does its job and its priced well but the jb adds fuel to control knock.

on a timing controllable setting you can retard timing to not get knock and use the same amount of fuel.I actually got better gas mil with my shark injected M3 because the map actually leaned out the fuel and used a little more advanced timing to get a few more ponies out of it up top.

This is wrong. The Procede adds JUST as much fuel as the JB does, they run nearly identical AFRs. The fact of the matter is that if you are using more fuel, you are using more power. Back off on the throttle until your instant MPG matches before and you'll be accelerating the same as before. Again, there is no change in cruising AFRs.

[grkm3]

Originally Posted by A418t81

This is wrong. The Procede adds JUST as much fuel as the JB does, they run nearly identical AFRs. The fact of the matter is that if you are using more fuel, you are using more power. Back off on the throttle until your instant MPG matches before and you'll be accelerating the same as before. Again, there is no change in cruising AFRs.

where did I ever mention procede?You can make more power with the same fuel with more agressive timing and save gas.You are going to be prone to knock tho.

re read his thread,timing does have an effect on mpg that was all I was saying.

the jb throws more fuel in because it has no timing control,its not rocket science here lol

How did I pick up power and get better gas milage in my M3?I guess timing had nothing to do with it.