Hey Everyone,
I'm getting a feel for the BJ74 I acquired over the summer. It runs great, has plenty of power (for a 120hp motor) and gets fuel economy in the low 20s on 33" tires, driven daily. Overall I'm really happy with it. The one thing I don't dig is the smokiness. It's not a lot of smoke, I'm sure it would be acceptable to a lot of Cruiser heads, but I am a closet tree hugger and would like it gone. I'm coming from a Cummins powered FJ62 that I had dialed to run on B99 and WVO and whatever else I threw at it with nearly no smoke. I also owned a 1HZ powered rig before this which was an entirely different animal.
Anyway, I've read all of the smoke posts and I wanted to spend some time with this motor before I started messing with it. It's pretty typical blackish diesel smoke, noticeable haze when cold, cleans up when it's warm but always leaves a haze when you're on the accelerator. If it burns oil, it's not much. Turbo seems fine. In my Cummins rig, I dialed the fuel, increased the boost and set the timing and pretty much got rid of everything. On that vehicle I ran an intercooler and it comfortably handled 25psi of boost. On this, I don't want to take it away from factory so I won't get to those sorts of numbers. I just acquired a boost and pyro gauge that I'll be plugging in to see where everything is at. There is a little leaking going on at the fuel injectors. Can't really tell what's going on there, it was a lot when I first started driving it, but it's toned down to a point where I debate whether it's worth messing with until I am ready to replace the fuel lines. Factory fuel lines look good, but I play on replacing them at some point.
So for the questions:
Is there a magic bullet for smoke on this vehicle?
I've read some info about shimming the waste gate to get a little extra out of the factory turbo. Can anyone here confirm there experiences with this? Getting a little more boost as fast as possible was the key to getting rid of the smoke out of the Cummins truck.
I believe the fuel pump is unmolested. I am not terribly familiar with it. Anyone have any advice on tweaking it? Should I leave it alone? I'm looking for fuel economy and enough power to do 70 on the freeway (which is does just fine), other than that I'm not trying to make it haul ass.
Thanks for any replies!
I'm getting a feel for the BJ74 I acquired over the summer. It runs great, has plenty of power (for a 120hp motor) and gets fuel economy in the low 20s on 33" tires, driven daily. Overall I'm really happy with it. The one thing I don't dig is the smokiness. It's not a lot of smoke, I'm sure it would be acceptable to a lot of Cruiser heads, but I am a closet tree hugger and would like it gone. I'm coming from a Cummins powered FJ62 that I had dialed to run on B99 and WVO and whatever else I threw at it with nearly no smoke. I also owned a 1HZ powered rig before this which was an entirely different animal.
Anyway, I've read all of the smoke posts and I wanted to spend some time with this motor before I started messing with it. It's pretty typical blackish diesel smoke, noticeable haze when cold, cleans up when it's warm but always leaves a haze when you're on the accelerator. If it burns oil, it's not much. Turbo seems fine. In my Cummins rig, I dialed the fuel, increased the boost and set the timing and pretty much got rid of everything. On that vehicle I ran an intercooler and it comfortably handled 25psi of boost. On this, I don't want to take it away from factory so I won't get to those sorts of numbers. I just acquired a boost and pyro gauge that I'll be plugging in to see where everything is at. There is a little leaking going on at the fuel injectors. Can't really tell what's going on there, it was a lot when I first started driving it, but it's toned down to a point where I debate whether it's worth messing with until I am ready to replace the fuel lines. Factory fuel lines look good, but I play on replacing them at some point.
So for the questions:
Is there a magic bullet for smoke on this vehicle?
I've read some info about shimming the waste gate to get a little extra out of the factory turbo. Can anyone here confirm there experiences with this? Getting a little more boost as fast as possible was the key to getting rid of the smoke out of the Cummins truck.
I believe the fuel pump is unmolested. I am not terribly familiar with it. Anyone have any advice on tweaking it? Should I leave it alone? I'm looking for fuel economy and enough power to do 70 on the freeway (which is does just fine), other than that I'm not trying to make it haul ass.
Thanks for any replies!