31' Fastech speeds???
 

What would a 99 through 02 31' Fastech run with either the 7.4/385hp magnums or the new 8.1's/375hp engines??

Low 70's GPS should be about right,speedo might say 74-75. The new 375hp 496 is pretty strong, probrably stronger than the 454mag it replaced.

with Prochargers @ 3-5# you would see 83 gps.

B,

We have a 2000 312 with 454 Mags stock. It runs 77.8 on gps with 30 lab finished and 74.7 with 28's lab finished. Ya, way too much money in props! We got these numbers on a 1/2 good day on the Ohio river. 84 deg, 70% hum, 60 gal on board.

We love the ride it gives us in the big water up on Lake Erie. 2 to 4 footers are GREAT FUN!!!:D :D :D We are going up Friday with Bridog to see if we can find a little chop.

All the best.