Andyinchville1
Veteran Member
Hi All,
Most people on this site modify their cars for better performance and that often means more power.... sometimes LOTS more but who can blame them? ....I've been bitten by the bug too! ;-)
Anyways, it seems that these same cars can have their MPG's stay the same OR actually go UP when driven conservatively(when compared to stock ....my assumption is better / fewer pumping losses due to better flowing exhausts, intakes , turbos etc and better optimization of fuel injection via larger injectors , advanced timing etc...).
I am hoping to see if there is a correlation (and I'm pretty sure there is) between performance mods and an increased MPG's when driven "normally" or at least the same as stock in order to see MPG increases or decreases for similar driving.
I am wondering also..... at what point do mods go so far as to negatively affect mileage ? Like maybe an injector gets so big that fuel just dribbles out as opposed to proper atomization etc..
I would like to see how far one can go modding before it results in worse fuel economy if driven conservatively.....(maybe "normally" and not hot rodding around)
To start ,
My car is modified per my signature and I get MPGs per the fuelly link in my signature.
I probably drive slower than most (typically 62 to 66 mph regardless of speed on the highway just to be able to keep speeds at a relative constant over many miles .and because I drive at night when deer are out) .
My MPG's have gone up from stock considerably...
Before any mods, I was typically 46 to 48 mpgs highway
A big MPG boost came from the Tune / Pump / injectors ( I did the 11 mm pump / injectors at the same time since my pump stopped working (at about 315K miles) ... the tune was done before the pump / injectors but I'd have to look for the records on that ) ... got me closer to 50 - 52 MPG and sometimes a tiny little bit past it).
Somewhere in here I upgraded tire size to 205 70R 15 then again to 205 75 R15 for more overdrive effect ... this helped alot ... in direct correlation to the increased diameter! .... a "free" mod if you need tires anyways. Somewhere in here 3" exhaust was added .... This got me into the 52 to 54 mpg range.
My last round of mods (BRM intake , upgraded SMIC, 3 Bar MAP) has pushed me up to tanks in the 54-56 MPG range ... I am thinking there is more to be gotten because I am not as modded nearly as much as many on this site..
What kind of highway MPGs are you getting and what are your mods? (also , what were you getting before your mods?)
Thanks in advance for any and all help.
Andrew
Most people on this site modify their cars for better performance and that often means more power.... sometimes LOTS more but who can blame them? ....I've been bitten by the bug too! ;-)
Anyways, it seems that these same cars can have their MPG's stay the same OR actually go UP when driven conservatively(when compared to stock ....my assumption is better / fewer pumping losses due to better flowing exhausts, intakes , turbos etc and better optimization of fuel injection via larger injectors , advanced timing etc...).
I am hoping to see if there is a correlation (and I'm pretty sure there is) between performance mods and an increased MPG's when driven "normally" or at least the same as stock in order to see MPG increases or decreases for similar driving.
I am wondering also..... at what point do mods go so far as to negatively affect mileage ? Like maybe an injector gets so big that fuel just dribbles out as opposed to proper atomization etc..
I would like to see how far one can go modding before it results in worse fuel economy if driven conservatively.....(maybe "normally" and not hot rodding around)
To start ,
My car is modified per my signature and I get MPGs per the fuelly link in my signature.
I probably drive slower than most (typically 62 to 66 mph regardless of speed on the highway just to be able to keep speeds at a relative constant over many miles .and because I drive at night when deer are out) .
My MPG's have gone up from stock considerably...
Before any mods, I was typically 46 to 48 mpgs highway
A big MPG boost came from the Tune / Pump / injectors ( I did the 11 mm pump / injectors at the same time since my pump stopped working (at about 315K miles) ... the tune was done before the pump / injectors but I'd have to look for the records on that ) ... got me closer to 50 - 52 MPG and sometimes a tiny little bit past it).
Somewhere in here I upgraded tire size to 205 70R 15 then again to 205 75 R15 for more overdrive effect ... this helped alot ... in direct correlation to the increased diameter! .... a "free" mod if you need tires anyways. Somewhere in here 3" exhaust was added .... This got me into the 52 to 54 mpg range.
My last round of mods (BRM intake , upgraded SMIC, 3 Bar MAP) has pushed me up to tanks in the 54-56 MPG range ... I am thinking there is more to be gotten because I am not as modded nearly as much as many on this site..
What kind of highway MPGs are you getting and what are your mods? (also , what were you getting before your mods?)
Thanks in advance for any and all help.
Andrew