Question!!!! my buddy took his m1's off his 42 fountain with 502's fuel inj. in it.Now it has no power ,had 30 bravos on it went down to 26 bravos motors won't turn above 3900.I'm thinking comps need reflashed or drive ratio is a 1.35 and the motors don't have the power to spin them. Motors with chargers were at 615 hp?????????? he was told.Any ideas where to start looking.Mail me PLEASE with any ideas. [email protected] Thanks JOHN SR

ttt

the prochargers require a flash to run right when you install them so my understanding would be you need to flash the computers back to stock so that they run right now with out the procharger.... my .02 hope it helps

This was my thoughts also ,trying to get a handle on this so we don't spend money for no reason so any input is helpfull. Thanks JOHN SR

even with the reflash he will probebly need to step down to at leaste a 22p bravo one prop to get any rpm out of the engines with a 1.36 ratio drive..

Bingo!

More than likely, you're going to need 1.50 gears.

u can use the 1.35 gears with a lesser pitch prop,but u will need a computer reflash.

What he said!

Depending on what year 42 it is, but my buddy with a 2006 42 turns 30's with twin staggard 525's and 1.5 drives. I think you might be overpropped, rich, and lacking some timing for stock 415HP 502 mags with the ecu's setup for the blowers.

I don't know if it has 1.35 was just saying that it could be a reason for sum of this problem, we are going to check the ratio first,so keep the input coming.JOHN SR

I have done this, but the reverse direction. More than likely the ECM's will need to be flashed to stock, injectors changed to stock, and possibly the drives need to be 1.50 ratio. Jeff Wurl