Well I have had enough of my slow, under powered 12H-T in my HJ61. Yup, it is slow, and don't let anybody tell you otherwise. Oh it's heaps faster then the 2H or the 3B powered units, but it's still under powered...... Don't think so??? Come drive my other diesel... 
I have been driving the truck for a month and I feel I know it pretty well. The auto is nice. I plan on making it better. Passing power is OK, but it's not quick. 0-60 times......I'll tell ya when they get respectable. Wheeling power needs improvement.
So, where to begin.....
Air. It needs better/cooler air flow. The first thing is removing that restrictive muffler and fart can. I am going to go up to 3" mandrel and straight pipe the old girl. I also have an amsoil air filter with a safari snorkel (well I ordered it) to help it breathe better. This alone should open up a few starving horses.
Inter-cooler, I think it is actually a pre-cooler but Oh well. I am having issues with this one. There is not a lot of room up front to add the size of rad that I would like, but I do not want to get rid of the a/c cooler. I may have to "gulp" be satisfied with an undersized
inter-cooler. Anything is better then nothing.
Instrumentation. Anything after the above requires the use of gauges. I am installing a set of Isspro gauges for the EGT and boost in the overhead console that once housed the outdoor temp and an altimeter. It is a tight fit but should work. The probe will go pre-turbo for the pyro. I will pull boost from where ever it is convenient.
More Boost. The next to go is the wastegate. Or at least I need to get some control over the amount of boost. That slick little gismo you see with parts made from home depot will be used. I have been reading 12 psi is a good place to start...
More fuel------> with the above done, I am sure EGTs will need to be increased to take full advantage of the power
Propane Injection baby! I couldn't do it to the 3B but with the DI of the 12H-T look out here it comes!! I have the Powershot 2000 that I originally bought for my Duramax. It is boost controlled and adjustable for different power gains. It is directly injected into the flow of air right after the air cleaner.
Fuel adjustment-------> At this point I would like more fuel to gain more power but I am hoping that all of the additions before the PI will satisfy my thirst for power. This allows me to use the propane to gain lower EGTs and hopefully better (because up to now it has been horrible) fuel economy. We'll see how long this lasts
Getting it to the ground. The A440F will get a new valve body for stiffer shifts and better handling characteristics. I am going to go with the set up from Wholesale Automatics in the Land of Oz. I am also "smurfing" all of my birfields.
Those are my plans. If you have any suggestions or criticism, pls speak up before I do something stupid....
Brad "I need more power" Taylor
I have been driving the truck for a month and I feel I know it pretty well. The auto is nice. I plan on making it better. Passing power is OK, but it's not quick. 0-60 times......I'll tell ya when they get respectable. Wheeling power needs improvement.
So, where to begin.....
Air. It needs better/cooler air flow. The first thing is removing that restrictive muffler and fart can. I am going to go up to 3" mandrel and straight pipe the old girl. I also have an amsoil air filter with a safari snorkel (well I ordered it) to help it breathe better. This alone should open up a few starving horses.
Inter-cooler, I think it is actually a pre-cooler but Oh well. I am having issues with this one. There is not a lot of room up front to add the size of rad that I would like, but I do not want to get rid of the a/c cooler. I may have to "gulp" be satisfied with an undersized
inter-cooler. Anything is better then nothing.
Instrumentation. Anything after the above requires the use of gauges. I am installing a set of Isspro gauges for the EGT and boost in the overhead console that once housed the outdoor temp and an altimeter. It is a tight fit but should work. The probe will go pre-turbo for the pyro. I will pull boost from where ever it is convenient.
More Boost. The next to go is the wastegate. Or at least I need to get some control over the amount of boost. That slick little gismo you see with parts made from home depot will be used. I have been reading 12 psi is a good place to start...
More fuel------> with the above done, I am sure EGTs will need to be increased to take full advantage of the power
Propane Injection baby! I couldn't do it to the 3B but with the DI of the 12H-T look out here it comes!! I have the Powershot 2000 that I originally bought for my Duramax. It is boost controlled and adjustable for different power gains. It is directly injected into the flow of air right after the air cleaner.
Fuel adjustment-------> At this point I would like more fuel to gain more power but I am hoping that all of the additions before the PI will satisfy my thirst for power. This allows me to use the propane to gain lower EGTs and hopefully better (because up to now it has been horrible) fuel economy. We'll see how long this lasts
Getting it to the ground. The A440F will get a new valve body for stiffer shifts and better handling characteristics. I am going to go with the set up from Wholesale Automatics in the Land of Oz. I am also "smurfing" all of my birfields.
Those are my plans. If you have any suggestions or criticism, pls speak up before I do something stupid....
Brad "I need more power" Taylor
I wasn't going to respond but it was eating away at me and I couldn't handle it any longer 
I'm planning a turbo and IC as soon as i can afford it. 
