with the 500 efi what prop are you guys runninig and are you spinning it in or out, my buddys 28 runs nicer without porpoise if he turns the prop counter clockweise he is getting 69 on gps would like to see over 70 , also his runs 180 to 195 temp with a 160 tstat seems a bit warm. any advice.

The temps are high..I removed the water pump and ran Stainless Marine crossovers and with 165 thermo I never saw above 150-155 on the temp plus saved all the weight from that heavy water pump. My question (not having any personal experience with high h.p. singles) with a single/bravo would be wouldn't you reverse the shifter linkage to have the prop turning opposite the engine crank to offset torque steer.

yES HE IS RUNNING IT IN REVERSE FOR NOW TILL WE CHANGE IT ON THE STICKS.

Why would prop rotation change how the boat rides?
Also, will the boat list to one side more from prop thrust by changing the rotation? I spin mine RH and need a little port tab to balance the boat at low speed.

anything over 60 will torque roll unless it runs a left hand rotation prop. my OLD 500 efi never ran above 145

What kind of speeds was you getting

Ours stops torque roll above 45-50. I pull the tabs above level 2 clicks for max speed with no roll. With the last motor build it runs high 70's low 80's GPS.
I run a 28 RH Maximus.

high 70 low 80s what power was that.

86 gps 2 people 1/2 to 3/4 of fuel spinning a 32p bravo 1 labbed. lefty. tabs at 2 drive at 6

Wow what power was you running