Blower doods, what is your gas mileage?
11-15-2009, 09:21 AM
#1
3rd Gear Member
Thread Starter
Join Date: Jul 2009
Location: South Florida
Posts: 566
Blower doods, what is your gas mileage?
I'm running a Whipple, 11 lbs of boost, GT500 fuel pumps with 34 lb injectors, no other mods other than exhaust with 3.55 gears and 5 speed. With strickly interstate driving at 70-75 mph and non boost acceleration, I can only get as much as 20.5 mph on level ground (not too much above sea level). Are ya'll in the same range? I would have thought I would get a little better than that, with a slight improvement of volumetric efficiency provided by the blower with conservative driving and 3.55 gears? I can live with it no problem, but I would have thunk better.
11-15-2009, 10:14 AM
#2
2nd Gear Member
Join Date: Sep 2007
Location: Austin, Texas
Posts: 230
I am getting the 6.5 psi Whipple put on this week. As I can push 30 mpg pretty hard now (65 mph on mostly level ground and cruise. Last actual numbers- 288 miles, 9.7 gal. 29.7 mpg), I am hoping for no more than a couple of mpg drop. I am really interested in some results from this post.
Frank
Frank
11-15-2009, 10:21 AM
#3
4th Gear Member
Join Date: Feb 2005
Location: houston, tx
Posts: 1,660
i went from around 21mpg to around 17-18. it will drop tremendously if you stay in the boost at all really. i get around 11-12mpg if i drive it like it is meant to be driven. whats the point in being boosted if you're gonna worry about mpg???
11-15-2009, 01:14 PM
#5
2nd Gear Member
Join Date: Sep 2009
Location: Mid MI
Posts: 205
I'm running a Whipple, 11 lbs of boost, GT500 fuel pumps with 34 lb injectors, no other mods other than exhaust with 3.55 gears and 5 speed. With strickly interstate driving at 70-75 mph and non boost acceleration, I can only get as much as 20.5 mph on level ground (not too much above sea level). Are ya'll in the same range? I would have thought I would get a little better than that, with a slight improvement of volumetric efficiency provided by the blower with conservative driving and 3.55 gears? I can live with it no problem, but I would have thunk better.
11-15-2009, 02:30 PM
#6
4th Gear Member
Join Date: Aug 2008
Location: Mississippi
Posts: 1,679
I'm running a Whipple, 11 lbs of boost, GT500 fuel pumps with 34 lb injectors, no other mods other than exhaust with 3.55 gears and 5 speed. With strickly interstate driving at 70-75 mph and non boost acceleration, I can only get as much as 20.5 mph on level ground (not too much above sea level). Are ya'll in the same range? I would have thought I would get a little better than that, with a slight improvement of volumetric efficiency provided by the blower with conservative driving and 3.55 gears? I can live with it no problem, but I would have thunk better.
11-15-2009, 02:55 PM
#7
5th Gear Member
Join Date: Oct 2009
Location: Livin in NC, from Michigan...Yooper
Posts: 2,008
10stang not sure maybe you need a tune, one guy in our club has the vortec 500 + rwhp before he ended up with 8 holes in the block from too many runs at the drag strip was getting 30 on a '06 convert. on highway, a this other guy is getting 18 in his 98Saleen, brace yourself.............he running over 1100 rwhp, me with what i have in my signiture i get 22 during week for work, 46 miles round trip 55 to 80 mph and running to elizabeth city 70 , 28 mpg
