thajuggla

Hey guys, I have 87 GT Vert. Only mods I know of it having are shorty equal length headers and bigger throttle body. I seem to get 170 Miles per tank, does this seem like this should be right? I remember when I had a 91 lx 5.0, I got around 225 mpt and that was a stock car. Also the 87 is a SD and 91 was of course MAF.

mustangsneverdie

is the vert auto or standard same ques. about the lx but the verts are heavier than the lx's which could drop some mpg

thajuggla

they were both 5spds. I can see the vert droppin some MPG, but not by that much.

AdderMk2

thats very low...

and if you are worried about gas mileage, you are driving the wrong car

thajuggla

im not worried about gas mileage, i was just wondering why such the big difference thats all.

projectresto83

My 3 speed carb gets better milage than that and I race up and down the highway in it daily. Do a tune up and run the KOER test and keep your foot out of the gas.

97tplsGT

does the car seem like its running correctly, i.e. missing, stuttering, whatnot?? Maybe do a fuuuuull tuneup, all the usuals plus even a fuel filter. My little bro had a ttop 87 with a full shorty back, o/r, dumped exhaust, bumped timing, cai, and an anvil for a foot, and still got better mileage than that. He was running stock 3.08's, so maybe you have a gear mod you didnt know about? Im sure you would tell the difference, being a previous stang owner, but.........just a suggestion. Good luck...

thajuggla

Well the car seems like its running correctly, except it idles a lil high. usually right above 1k rpms, my other stangs were a few hundred before that. It doesnt stutter, miss or anything and it seems to be running great. I havent had a chance to check the gear ratio yet but they seem to be 3.08's, i know they def aint the 2.xx,

I will be doing a full tuneup since you guys suggested it. What all should I do in this tune-up ?

thajuggla

also how do I do the KOER test?

NYstang

thats way off...


+1 for tuneup. my friends have 5.0's- both auto/2.73 cars, one 87 and a 91. the 91 consistantly got 26mpg going 75 on a trip, and the 87 peaked at 31mpg going cross country behind the U-haul(at 55mph)