GM DETROIT DIESEL 12V71 TI

At 1000 rpms they burn 6 gph each. At 1900 RPMS, around 40 GPH each. Providing vessel achieves 2300 RPM's WOT.

Here are some GPH charts for the 12V71TI.

at 1200 RPM you are burning 8gph and at 1900 you are at 30 gph. I have flow scans on my boat and that pretty darn close where I am at.

The boat in my signature picture originally had 900 hp 12V71TI's and at our normal 1950 rpm cruise was 32gph per side. They were some of the last factory 71's in the Penske era (1998), not aftermarket JT's or Covingtons. If I recall correctly they did end up with 12 hole 145 injectors but could have been 135's.

My boat came with BK Power 900Hp 12v71TI's that had 12v71TA 1080hp injectors . I have since detuned it back to Original Detroit Factory Spec. Less Fuel, Less Smoke.. but Less top speed.

TI's

As many times as I changed kits in her (5!) I should have remembered the cooler was under the blower so TA's Ralph, sorry!

I ran a set of Covington TI's which were 765hp. The chart posted is for only 70 Liter per hour injectors. The Covingtons I ran had 110 Liter per hour injectors but also ran a generator injector height, 1.46". It did the figures I posted, but it also ran crystal clean at ALL rpm points.

My 12V71 TI engines were overhauled recently. If they need to be done, pull them out and overhaul in the shop. Approx $45k each.

The dyno horsepower is 860 hp @ 2300
The Injectors are 9215 part R5229715
The Turbos are R5101513

I'm guessing the cams were advanced because 2 different Detroit Diesel dealers INSISTED on setting the injectors at the marine height 1.96" and the motors black smoked so bad, you could not see 50' past the transom. I do not remember the injector number......but look in the DD book under Covington and 765hp and you can probably find it. I haven't dealt with that boat since 2012.