99svtvert
New Member
For those interested in FR500 motor Heads, Cams, Intake, (Stock 03 Cobra Tank and pumps, 39# inj, 90mm LMAF);
Fuel mileage (3.73s):
1st Tank -- 178 Miles (Dyno Tunes)
2nd Tank -- 210 Miles (Dyno Tunes)
3rd Tank -- 165 Miles (several easy 1/4 mile runs and Dyno Tunes)
4th Tank -- 277 Miles (Mostly City Driving)
5th Tank -- 314 Miles (City and Highway)
6th Tank -- 331 Miles (Mostly Highway)
7th Tank -- 326 Miles (City and Highway)
8th Tank -- 276 Miles (City)
9th Tank -- 337 Milrs (Mostly Highway)
10th Tank -- 320 Miles (Mostly Highway)
Swapped in 4.30's; out 3.73s
11th Tank -- 309 Miles (City and Highway)
12th Tank -- 297 Miles (City and Highway)
13th Tank -- 304 Miles (City and Highway)
3644 Miles Total
Avg. -- 280.7 Miles per Tank
Take away the first 3 Tanks for breaking and tuning, then
Avg. -- (minus 3 Tanks @ 533 Miles) = 311 Miles/Tank.
About 20.6 MPG
Which, beleive it or not, is a little better than the stock motor I had. I did not have an 0.5:1 6th before but I also did not have 4.30's either.
Fuel mileage (3.73s):
1st Tank -- 178 Miles (Dyno Tunes)
2nd Tank -- 210 Miles (Dyno Tunes)
3rd Tank -- 165 Miles (several easy 1/4 mile runs and Dyno Tunes)
4th Tank -- 277 Miles (Mostly City Driving)
5th Tank -- 314 Miles (City and Highway)
6th Tank -- 331 Miles (Mostly Highway)
7th Tank -- 326 Miles (City and Highway)
8th Tank -- 276 Miles (City)
9th Tank -- 337 Milrs (Mostly Highway)
10th Tank -- 320 Miles (Mostly Highway)
Swapped in 4.30's; out 3.73s
11th Tank -- 309 Miles (City and Highway)
12th Tank -- 297 Miles (City and Highway)
13th Tank -- 304 Miles (City and Highway)
3644 Miles Total
Avg. -- 280.7 Miles per Tank
Take away the first 3 Tanks for breaking and tuning, then
Avg. -- (minus 3 Tanks @ 533 Miles) = 311 Miles/Tank.
About 20.6 MPG
Which, beleive it or not, is a little better than the stock motor I had. I did not have an 0.5:1 6th before but I also did not have 4.30's either.
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