Changing Injectors for 6V92 Turbo

[David]

Has anyone had any experience with changing out the injectors on a 6v92 turbo.
Several years ago, I thought I remembered reading where someone changed from a 90 to 100's to increase power and it seems like they said they gained some fuel mileage as well.  If anyone has done this or knows anything about it, please respond.  I was wondering if it was worth it and how well it really works.

[luvrbus]

David, do you know which 90 injectors you have and what the injector timing is, those little engines will just stand so much fuel without doing some upgrades.     good luck

[TomC]

The only time you should go to 100 injectors is if you have at least a 10 spd, preferably a 13 spd manual to keep the rpm's up above 1600rpm at all times.  I did exactly that to my 8V-92TA in my first truck.  Took out the 9A90's and installed 9A00 (100 injectors).  The only thing that was greater was the power.  It was harder to start, smoked (since I didn't change the turbo), got worse fuel mileage-I had the 9A90's reinstalled and never looked back.  If anyone tells you that bigger injectors get better fuel mileage, they are smoking funny cigarettes.  If you're running 9A90's now, you can either drive the bus slower, with a lighter foot to get better fuel mileage, or you can change to 9G80's for reduced power and much better fuel mileage (by close to one mpg).  Bigger injectors and better fuel mileage don't go together.  On an electronic engine, you can increase the power setting at the CPU and if driven the same, sometimes get better fuel mileage-but not on an mechanically injected engine.  Good Luck, TomC

[JohnEd]

I have wondered long and hard about those injector part number designations.  I have deduced that the last number refers to the size of the orifice that spits the D into the cylinder. What is the significance of the alpha numeric soup prefix?

Thanks,

John

[Tim Strommen]

JohnEd

I thought the last two digits were the "CC" of how much volume the injector would inject at WOT per stoke... (I'm probably smoking those funny cigarettes )

Has anyone had any experience with changing out the injectors on a 6v92 turbo.
Several years ago, I thought I remembered reading where someone changed from a 90 to 100's to increase power and it seems like they said they gained some fuel mileage as well.  If anyone has done this or knows anything about it, please respond.  I was wondering if it was worth it and how well it really works.

The same holds true for the ol 2-strokes as does any power upgrade on any engine type (after all, they pretty much all burn an atomized spray of flammable liquid).  You can't just increase the size of the injector and wipe your hands saying "Done"...  the combustion needs air at just the right mixture in order to efficiently and completely burn the injected fuel.

My advise is for you to talk to Don Fairchild, I did last year and he gave me a "recipe" more or less for a HP target I wanted to attain on my 6V-92TA Silver.  This includes Injectors (with special mods), Cams, Cylinder Liners (where the intake holes are, so more air gets in the cylinder), and modifications to the blower, and cooling system (i.e. removal of after-cooler and addition of charged-air-cooler).

-Tim