Is this a decent MPG average?
 

28.4 AVG in 5th 65mph
28.3-27.9 in 6th at 65mph

Maybe the MPG would improve a little in 6th if I went a little faster?

Engine mods

Corksport intake
Corksport Inlet
Corksport CF airbox
HKS SQV IV (REAL one jdm kit) VTA
Autoexe suction pipe upgrade(cold pipe upgrade)
Corksport Test pipe
Greddy SP Elite 70mm(2.75in) Exhaust

Other mods not relative to engine performance so I wont list them

Kasukabe PD 0 tune... (990x) zero tune = NO TUNE at all

Go 72 in 6th. Also, stop caring about MPG. This is the wrong car for that.

eh im 24mpg ish per tank with my driving

I thought it was worse than it was.. I guess im used to driving the rental around so much and its a hybrid so when I get in my car it feels like its sucking gas even though its probably only getting 8-10 less..

Also yea I guess that why the gas fluctuated lower mpg in 6th at the same speed because the load was higher on the engine especially on the grades

:) weeeeeeeeeeeeee

That's where I thought I was at 22-24..

I gained 10% fuel econ with my 93 Freek tune, and lost that plus 10% more on the 3/9 corn tune.

Decide if you want power or a 30mpg car - that's pretty much how it works. Or spray meth and get the best of both worlds.

Yea I planned on doing that maybe later when and IF I get a CPE DP with an AEM UEGO and of course HPFP at the same. If I do that. I would get a CS downpipe but it doesn't come with an EXTRA BUNG for the wideband.

I don't plan on running corn though I will stick with 92/93.

Are you pulling these numbers from the on-board computer? If so, they're totally and utterly wrong. They tend to be about 3-4MPG too optimistic, calculate at the pump instead (my car says I have a lifetime average of 27.2MPG, but my best tank ever, 100% highway and calculated at the pump, was 26.8 - explain that to me). If you have no tune, you're still running pig-rich, there's no way you're getting mileage that good.

Also, an aside, but just checking. Do you have HPFP internals? They're not listed in the mods in the OP, and they won't affect gas mileage, just wanted to check you're not about to destroy your car.

TIS

@ANITIX87; is just bitter that his car is slow.

Oh is this the Prius forums? I forgot :P

I'm am jelly, my on car computer it says avg 20mpg, avg speed 18mph. Man Long Island/queens traffic suck.

You're on borrowed time with an intake and a test-pipe without a tune and without a HPFP upgrade.

Without a tune, it's also hard to break 30mpg. At 65mph, you should be pretty close to max efficiency in 6th gear IF, and ONLY IF you're able to stay in the low-load portion of the ECU's mapping. If you aren't, then yes, it will suck down more fuel than the equivalent speed in 5th gear.

I only smile when I see my MPG drop to single digits.

During my track day I averaged something around 8mpg, which included the times coasting around the infield and the ~5 mile drive to the station and back. There's just something satisfying about burning that much gas at once.

These numbers arent bad for a sporty turbo hatchback.

My car rarely hits + boost on a hill maybe.. Not worried right now I was gonna do the HPFP when I did full downpipe.
Yea somebody else talked about the 30mpg that would be awesome.. Next round of performance mods I will look into all that. I also will be installing a AEM UEGO wideband monitor with the DP install and pump

I came here to ask why you wanted to blow up your car by not running internals.
Then I was going to laugh at you specifying your JDM BOV.

Now I'm going to sit around and ponder why this guy bought a speed3 and modded it and never takes it to full boost and is worrying about his MPGs.
Sounds like the wrong car for you bud.

Your numbers are fine, my overall is like 25 or 25

Seems like you don't know much about cars or im guessing its just lack of experience with parts/etc

The market got saturated with knock off HKS SQV valves which led to it getting a bad reputation. Because kids and some adults thought they were getting the real deal but instead got a piece of crap that didn't seal properly, leaked, caused issues. That's why I specified an actual JDM kit because the valve was specifically for the mazdaspeed 3,etc from HKS not some ebay vendor/forum etc.
Including a proper flange in which you could run re-circ on your stock return hose.


enlighten me how you can blow up a car if your driving normal. I was told the same crap about my WRX and speed 6..

WRX mods 0 tune like that for over 2 years got an open source later

Samco inlet
Zero sports post maf
Cobb Intake
HKS SQV IV VTA
Process west topmount
HKS BELLMOUTH downpipe
AEM UEGO AF
Blitz nur spec R exhaust
Beatrush alt pulley
Cusco oil catch can
GT Spec up-pipe
Ported stock Manifold

Speed 6 mods no tune
ETS TOP MOUNT
Autoexe cold pipe upgrade
HKS SQV II VTA
Corskport racepipe/tp
Corksport Exhaust
Corksport intake without the straightener in the maf housing
Corkposrt CAi box
Corksport inlet

almost 2 years like with 0 tune then got one later after HPFP..

I could go on

I think the point is how you drive.

My WRX was NEVER launched once. Not one time It may of seen redline in 3rd or 4th a handful of times. My speed 6 only saw the track once after the tune. Only launched it at the track never launched it or raced it really too much anywhere..

I understand the PU has fuel issues because the stock pump might drop off under boost spikes/other issues with mods.

You cannot blow your motor up unless their is something wrong with it to begin with just driving around. Barring a freak accident or again poor maintenance etc.

The issues regarding what your referring is 99.98 percent of the time from boost spikes/boosting that cause a lean condition due to the HPFP not being able to supply fuel.

You cannot achieve that failure if your not boosting your car.. A stock HPFP pump could run a GT3076 as long as you don't get into boost. Since I don't race my speed 3 the likelihood of me even hitting Full boost is almost impossible. That's why I was gonna do the HPFP and DP last together with the AF gauge to monitor.

You worry about your car let me worry about mine. And my non speeding slow speed 3.
I did take it up to 75 on the highway the other day only because the speed limit allowed it.. :)

Not a personal attack on you just wondering why you think you can blow a motor from an issue that's only caused by over boosting/load issues and the pumps failure to apply the proper pressure to maintain that. If your not even boosting putting enough load to register any type of boost really above 5psi. I didn't get my car to race it or to make the most power and most boost. That's just now how I am. I don't care about being the fastest, second fastest, or anywhere close. I barely even drive my car 12,800 miles on it now and its a 2012.

First, you were just someone with little knowledge and a weird priority of fuel efficiency. Now you're just a fucking idiot.

You NEVER let your car get into boost?!?! You bought a turbocharged car, and paid a premium for it (as you did with the WRX and MS6). Why didn't you spec a 2.5 NA MZ3, save money, get into a lower insurance bracket, and have the fuel efficiency you so desire?

What you say about "cannot blow your motor unless there is something wrong" is not true. We've had guys blow stock engines. We've likewise had guys blow engines while using upgraded HPFPs. The fuel pump is not a lifesaver, but it is a necessary security measure for the sake of your engine.

Running your mods without tunes is like marrying a fat girl and putting her in sexy clothing without getting some of the weight off her. Sure, the clothes are sexy, but they're useless on her because you get nothing out of it. Get some of that weight off her, and fuck the shit out of her.

TIS

Lmfao! What a fucking moron.

I said a high percentage of the time a blown motor here is due to those combined factors. WOT/BOOST/load and the stock HPFP cannot provide the fuel required(which leads to detonation/knock etc. And then you have that very small variance of poor maintenance issues oil/etc and engine failures to to a poorly built motor etc.

You could buy a Honda civic drive it to the store an the motor blow up. These types of failures are small barring a factory defect internally of some kind.

If your AFRS, timing, etc are fine under cruise how exactly are you going to blow your motor this way? I agree if I was punching it around town hitting peak boost and racing everybody from here to Timbuktu its likely the motor would pop at any given second.

And yes I have seen a stock speed3 pop personally it was a gen 1. But the guy was racing it when it happened. And the temp outside was close to freezing.

Leave my fat chick alone lol.. jk :)

As stated my HPFP will go in with the downpipe and my AEM UEGO when I install it. And I will be getting an open source tune shortly after but that wont be probably till next year or around November-December of this year

Lol. Buys a speed3, never hits boost. Sell the speed3, buy a prius, save money on gas

Yeah, I don't get this never hitting boost at all. My Speed hits full boost everyday, on my way to work. I get worried when by MPG breaks 20 that I'm not driving it right. :lmao:

I have a boost for breakfast and an ensure for dessert

I can understand if something is wrong with the car but its a waste of a speed to never hit boost. When I got this car I didn't give a damn about mpg's, as long as I could average 20's I didn't care. If I can be a full time college student, go out all the time and pay for premium at 4.0x a gallon so can op. Driving the car like a bitch will only save you like 4 bucks at the pump

That was a cool rant and all, and I still don't care about your MAD TYTE JDM BOV.

I'm just trying to figure out why you spent money on a speed3, and modded it, and drive it around never hitting boost and posting threads asking if you're getting decent gas mileage. Sounds like a fairly stupid endeavor to me.

I bought mine to go fast and fuck with gtis and subies

I bought mine and have fully expected it to blow up.....and it did.

Job well done. Shit happens when drivers drive.

Oh yeah, 21 mpg all highway @ 80 mph.

Eh It was either spending money on a speed 3 or a new 2015 wrx, 370z, c6 z06, etc.
my last 2 cars were awd so I was like eh. And I haven't owned a domestic since the early 90s so eh.

Plus I used to live in Hofu :). Regarding the money spending issue.

Why if you mod your car do you have to race around? Is that a required for todays generation? Its about having fun doing stuff to your car and enjoying it. Eh at least for me that is

And OP is wrong again. Imagine that. The majority of these engines blow at low RPM cruising at highway speed, immediately after giving it more throttle. That's with a STOCK tune, or with a shitty tune. Maybe you should read more before posting nonsense.

^^^ BINGO!

OP has shown that he doesn't know his distal alimentary opening from a breach in the terrain.

Actually, this is only partially correct. Obviously maintenance can have an impact on when and how a car blows up, but you're badly misinformed if you think that most blow-ups in the MZR platform are from WOT pulls. Most of the blow ups actually occur at rather moderate speeds NOT during WOT acceleration, but cruising around town after, or after getting off the highway.


True, but then you'd also have a Civic, and you'd probably be better off after it blew up anyway. We also happen to know that there were metallurgical anomalies in a significant proportion of the rods that Mazda put into the MZR DISI. It's a bit of a game of chance to know whether you're in good shape or not.

Stock tune is shit.

It's extremely unwise to do the downpipe and HPFP without a tune. The HPFP will only really do you any good if you allow it to flow properly, and this requires a tune. Otherwise, it behaves like the stock one because the ECU doesn't know it command anything else. The downpipe will cause you to throw emissions codes as well, and this will cause your ECU to command fueling targets that are not safe for your motor in the long-haul.

The idea of wasting money on the UEGO instead of a Cobb AP is really stupid. Why not spend the cash on something that will actually help your car stay on the road? The car has a wideband O2 sensor in it already, I'm not sure why, with the mods you have, you "need" an aftermarket wideband O2 sensor anyway.

Damn, I can almost watch my gas gauge go down sometimes, well not right now (taking it easy because of lean issue). But i would be more than happy if i found out i was getting 25mpg, but thats why my girl has a 4 banger honduh.

get out of the throttle lol..

but.....but......boost

The whole point of adding power to your car is so that you can feel it. I don't drive like an ass hat but I like to accelerate quickly when getting on the highway so I can actually feel the performance modifications I've made. The way you're talking it sounds like you'd spend $2000.00 on a stereo system for your car but never turn the volume up or turn the subwoofers on. What is the fucking point in that? LOL

Why are you so opposed to an AccessPORT? It's one of the best bang for your buck mods plus you can monitor what's going on and make sure everything is safe.

No offense, but it really doesn't sound like you've done your research on any of the cars you've modded. I too came from the WRX platform and the fact that you had all that stuff without a tune is just asinine to me. Depending on what year WRX you had, some of those mods are pointless as well.

Whats the point of buying a process west top mount for your wrx over a Cobb or perrin?
Because I could :).. Why buy a beatrush tow hook or belly pan? Why spend thousands on sti pink suspension parts/cusco/etc for your wrx? Lets just start with this one of over 15 in the past 20 years

2004 wrx... Never road raced, Never launched once from a dead stop. Converted to RWD and back as well.

http://i757.photobucket.com/albums/x...ps9d831830.jpg

http://i757.photobucket.com/albums/x...psd872b9d8.jpg

http://i757.photobucket.com/albums/x...ps41cf3c26.jpg


I could go back to my 62 impala SS I had in 11th grade :) but would rather start sooner.
Point being why do you have to race or go fast to be interested in it. That doesn't make sense.. Even if your car might be fast you have to race it? Why?

List of cars I have owned

62 impala SS BB conversion 396(402) Turbo 400
69 SWB chevy 327/.60 over 1/44 SC 6.70s in the 1/8th
70 SWB 327
Mid 80s western hauler 468(700hp) with a 300 shot on top)
55 chevy 2 door moved the 69 motor into it
87 cavalier(daily)
88 sentra(daily)
95 Civic back in 1995 with Drag Turbo kit(first turbo coupe in texas)
87 RX7 street port(t04)
87 Supra turbo
88 AE92 corolla GTS 3sgte swap
94 Suzuki swift GT - turbocharged
95 acura integra GSR
93 240 SX sr swap back in 2002-2003
2000 beetle 1.8tgls turbo
2004 wrx
2006 mazdapeed 6
2012 mazdaspeed 3

Several not listed :)

So basically what you're saying is: Too much money, and too little sense.

So you clearly have the money, so why not buy an AccessPORT and a good tune for the car? If you spent all that money, what's an extra 800 dollars to make sure it is running properly? I just can't fathom why anyone would throw all of those parts on a car without proper ECU mapping. You don't have to race it but if you have money to throw at a car, an optimal tune should clearly be on the list.

The car is clean looking for sure but running all of that stuff on the stock tune just seems pointless. Sure it looks nice but it's not safe. Granted, if you really never got on it, I can see why you didn't have any problems but still.

I never said you have to race the thing. I already said that I don't race my car. I do like to accelerate though. You can go WOT without breaking the speed limit. If I was just going to baby the car all around, I'd buy something that gets better gas mileage.

I've only owned 3 cars in my life and 2 that I've modded. One being a WRX, which I carefully researched and modded accordingly and the other is my 2012 speed3 which I'd say I've taken the right path with as well.

It's your money and your car but I just don't see why someone, who clearly has money to spend on performance parts, would not research and modify in the safest way possible.

I'm think more along the lines of 25.

I think OP is just scared of driving fast (probably puckers his asshole when he sees a cop), wants attention, and cares way too much about what others think of him. You don't buy a car like a WRX, Mazdaspeed, or most of the other cars in his list and then bitch about fuel efficiency or drive it like an old lady.

Well, you might, if you're a feggid...

TIS