so look at my sig, how much mpg will i loose compared to stock with all my mods and a good tune. i figured stock is 20 city and 25 on highway(idk about at 70 to 80, prolly 22). then what should it be with all my mods. thanks

 

You should gain gas mileage unless you're going WOT all the time.

 

I don't think you'll notice any difference personally. The tune will help but it really does depend 90% on how you drive.

 

i dont drive WOT all the time just the little races here and there. but besides that just to show off or something every now and then. but just driveing normal shifting around 4k rpms. and on the highway around 70 to 80 unless theres a race and no trafic then fast but dont worry about that. ill exept crappy mpg at those speeds


EDIT: and just cause i put mods on doesnt mean im gonna drive like an idiot. lol. but i still dont track my car or drag. i like the mods cause of what they do. and that it will make my car go faster when i need it or want it. personally i dont race unless other people start it and its something worth racing. if i no for a fact they have no chance then theres no point, but if its gonna be a close one then why not(and ill have the power when i need it) and i have a radar detector for those times, but i hardly race so i dont use it much

 

bump

 

street racing is bad... my lawyer liked it though $$$$!

 

If you drive aggressively getting tuned will help your mpg significantly... If you baby your car the mpg won't be affected much with tuning. Parts that help airflow like intake & exhaust will raise your mpg slightly.

Cheers!

 

I have read about cars that have over 500whp and get 30mpg. The whole key is your driving style. I drive about the same way you do and get around 20mpg in the city and have once got 25mpg on the highway but that is driving between 80-85mph. I consider my boost gauge and afr gauge my best assets when trying to increase my mpg. BLUF = better gas mileage means less boost.

 

and with S1s, how high will the rpm go. like 7500 or 8000 tops or what. when you get tuned, do they set a new rev limiter with cams

 

thanks man you helped alot. my brother said that with the mods ima have, and having 340whp im get like 12 mpg city and maybe 16 or 17 highway. thanks alot. so what do you think about my cam Question????

 

my mpg went up with my mods, it depends if you like to race it wot.

 

lol, thats good to no, what about the cam question.

 

with cams you need upgraded valvetrain if you want to spin faster.

 

I got 24mpg this last tank.

I get 28mpg when driving 100% highway @ 70mph

 

well stock is at 7200 to 7500 right, if i only go up to 8000 will it hurt it, if so what valvetrain should i get. like springs and retainers..