Thread:

Engine placement in a TX19

Originally Posted by TNYoungblood

How are the real fast guys doin it with the smaller impellers. Theres got to be more to it when these jets are running down in the 7s. Not doubting what your sayin but just tryin to learn a few things like the rest. I know a AA is gonna hole shot like a Sumbitch but how are these guys makein these B/C do it?????


Boost, boat looks killer!!!!

There are no gullwings running in the 7's! Not 18' or 19'. Tunnels yes and that is because it is a totally different boat and I would bet dollars to donuts that they are runnng a launch control to get those small impellers to get them outta the water the way they do.

Good hanging with you Dennis a couple weeks back, your boat came along way,great job on the build.

Originally Posted by Boost

Good hanging with you Dennis a couple weeks back, your boat came along way,great job on the build.

Same here bro. Didnt see you on sunday. Did you pack it up and head home? Thanks, it has been a long road of hard work and lots of $$$ but I am really happy with it now.

Originally Posted by TNYoungblood

True !!!!! Wasn't really referring to GW just jets in general. how does the launch control work???

Guess I just jacked this thread all up, sorry to the OP

My boat is pretty heavy and my engine sets 21" from the transom. It carries the nose pretty good and runs pretty dry. I'd like to see alittle more lift in the whole boat and get it ridein on the keel kinda like boosts boat but don't know if it will due to the weight. Thanks for the info Need4Speed

My boat is heavy too. I am 190lbs and can walk on the deck all the way around the boat. It weighs about 600 bare. I run pretty dry and on the keel but it took a lot of work to get it there. My motor is 21" from the transom too but my pump is all the way out the back so that a pop off would clear the transom without hacking into the transom for it. so with the jetaway and drive line, and the pump all the way out the back, I am at 21". So it is definately doable.

Originally Posted by TNYoungblood

What kinda HP you runnin???

My pump is stock location, half way in half way out. I done a few things over the winter and finally hit 100mph but I don't have a pick of it running so I'm not sure what it's doin. Our boats are pretty close to the same weight, I'm 680 without engine and interior

900 hp

I run a BC imp, inducer, w/NO launch control and I flat foot it from a dead stop.
Motor @ 23"
2 1/2 degree backcut shoe
Hyd diverter on timer
6' blocker
Full interior 650lbs hull & leaves hard like an 18'

we run similar stuff in the #905 but with a launch control.


back to lurking

Originally Posted by TNYoungblood

How does a launch control work in a jet???

Basically one is controlling the acceleration rate of the engine on takeoff so that the engine is not out accelerating the pump. If one has enough power to accelrate the pump past the point of keeping the impeller loaded, and runs through the impeller, this "burnout" slows acceleration.

There are various methods of controling from a simple switch or timer controlling a rev limiter or timing retard, to more elaborate slew rate controllers, etc.