Standalone owners and tuners: Who here gets 30+mpg.
09-20-04, 03:59 PM
#1
Standalone owners and tuners: Who here gets 30+mpg.
http://www.teamfc3s.org/forum/showth...1&pagenumber=2
Some people have a hard time believing is possible to get 30+ mpg out of a 13B with a standalone.
So who else here has done?
Some people have a hard time believing is possible to get 30+ mpg out of a 13B with a standalone.
So who else here has done?
09-20-04, 04:11 PM
#4
Lives on the Forum
I'm getting 28 to 28.25 mpg, stock ECU, which definetly doesn't make the cost of a standalone worthwhile 
Even with an SAFC, you're talking mostly highway mileage to hit 30...And during cruise, the standalone can't schedule fuel any better than the stock ECU, which is in closed loop at that point...
Even with an SAFC, you're talking mostly highway mileage to hit 30...And during cruise, the standalone can't schedule fuel any better than the stock ECU, which is in closed loop at that point...
09-20-04, 04:11 PM
#5
Rotodeus
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I think I found your problem as far as gas milage goes Bdoty:
"1988 10th AE
Powertrain: Jspec motor, mild streetport, TO4S 60-1, Spearco FMIC, Fluidyne radiator, Haltech E6K, Tial 46mm wastegate, ACT 6-puck clutch, 720s and 1600s.
Suspension: Tokico adj. shocks, Eibach springs, 17" Konig Imagines.
408rwhp, daily driven "
"1988 10th AE
Powertrain: Jspec motor, mild streetport, TO4S 60-1, Spearco FMIC, Fluidyne radiator, Haltech E6K, Tial 46mm wastegate, ACT 6-puck clutch, 720s and 1600s.
Suspension: Tokico adj. shocks, Eibach springs, 17" Konig Imagines.
408rwhp, daily driven "
09-20-04, 04:37 PM
#7
S4 now S6 soon...
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Grrrr... threads like this make me angry at my car. 86' GXl RB header, Pres-silence, cat-back, KnN adaptor, S-AFC that's all the engine mods I have I'm even still on stock sized rims and tires and I'm getting 20mpg on all freeway mileage, that's with the S-AFC tuned down in the cruising range.
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09-20-04, 04:45 PM
#9
i'll blow YOUR valve off
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a stock rx7 makes 17/24 MPG. just ask the window sticker (i think thats right...). HOW THE **** do you get 30??? I wanna do that to mine LoL... do you like keep it below 2k rpms or somethin? LoL... thats what my dad does with his jeep...
09-20-04, 05:08 PM
#12
09-20-04, 05:12 PM
#13
Freeing up the exhaust helps MPG a lot. My NA used to get 26mpg freeway w/ the only mods being a racepipe and weight reduction (2400lbs).
ScrapFC says he also gets 26mpg. He has header and freeflow cat in his heavier GXL.
Most NAs don't ever get stand alones, but it will help mileage.
ScrapFC says he also gets 26mpg. He has header and freeflow cat in his heavier GXL.
Most NAs don't ever get stand alones, but it will help mileage.
09-20-04, 09:12 PM
#18
Rotary Freak
I usually average about 24mpg on the freeway, but when I factor in the fact I have large tires it goes up to about 25mpg. I could do some more weight reduction to get that number to go higher, but I don't want to take out that much stuff.
09-21-04, 12:27 AM
#21
Lives on the Forum
I've noticed during my "mini-hesitation" problems that she'll run so lean the O2 sensor voltage drops to about .1v, so, however that translates into AF ratios, that's a little more leaner than you could run normally. In my case the FPR is screwed...
Surprisingly, I haven't noticed any better gas mileage running with her screwed up like that...This is in cruise, closed loop, BTW...
Surprisingly, I haven't noticed any better gas mileage running with her screwed up like that...This is in cruise, closed loop, BTW...
09-21-04, 03:21 AM
#22
I'm a boost creep...
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Originally Posted by WAYNE88N/A
...during cruise, the standalone can't schedule fuel any better than the stock ECU, which is in closed loop at that point...
09-21-04, 04:46 AM
#23
Emerald Triangle for life
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Originally Posted by WAYNE88N/A
...And during cruise, the standalone can't schedule fuel any better than the stock ECU, which is in closed loop at that point...
Also, by going to a standalone, you should be able to do away with the fairly restrictive stock MAF sensor and switch to a speed-density measurement using a MAP sensor in the dynamic chamber. Removing restriction in the intake is just as useful as removing it in the exhaust, since the engine doesn't need to burn as much fuel to create the energy it uses to move air in and out. Extra HP is just a happy side-effect of being able to move more air more easily.
09-21-04, 04:54 AM
#24
Rick James
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I have a standalone and my mpg suck! I won't do the math though...if I do I might come to my senses 
My mpg is better then when I ran the stock ecu and less mods.
My mpg is better then when I ran the stock ecu and less mods.
09-21-04, 08:34 AM
#25
EIT
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Originally Posted by ScrapFC
It is true that the stock ECU is in closed-loop during cruise, but that doesn't mean it's accurate. The S4 ECU is an 8-bit system with the same processing power as a TI-82 scientific calculator. A modern system should easily beat it in both resolution and sampling rate, making it much more accurate and thus more efficient.
Also, by going to a standalone, you should be able to do away with the fairly restrictive stock MAF sensor and switch to a speed-density measurement using a MAP sensor in the dynamic chamber. Removing restriction in the intake is just as useful as removing it in the exhaust, since the engine doesn't need to burn as much fuel to create the energy it uses to move air in and out. Extra HP is just a happy side-effect of being able to move more air more easily.
Also, by going to a standalone, you should be able to do away with the fairly restrictive stock MAF sensor and switch to a speed-density measurement using a MAP sensor in the dynamic chamber. Removing restriction in the intake is just as useful as removing it in the exhaust, since the engine doesn't need to burn as much fuel to create the energy it uses to move air in and out. Extra HP is just a happy side-effect of being able to move more air more easily.