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Drooling Piston

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Drooling Piston last won the day on January 2 2014

Drooling Piston had the most liked content!

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About Drooling Piston

  • Birthday 12/13/1962

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  • Location
    Tacoma, WA
  • Interests
    Family, Dirt bikes, Camping & Diesels

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  1. Drooling Piston

    Builing a compound set up

    I found it! I've been tinkering and tweaking adjustments. As it turns out, at first I had too weak a spring on the VGT control set up. as soon as I reved her up the air cylinder was over powering the spring (before she made much boost) and was pushing it almost wide open. So my VGT was acting like a big turbo. Late to spool up and little to no exhaust restriction. I think this is why my overall boost numbers have looked lower than they used to with a single turbo. I put a stiffer spring on there and it was holding it closed too far, too long, putting the turbo into the exhaust brake mode. I put on a longer spring that was stiffer, Now, I have the 16-17 hundred RPM spool up I was looking for. and with the little bit of exhaust restriction this added, my boost numbers are back up to what I remembered them to be. I'm much happier with this set up now.
  2. Drooling Piston

    Builing a compound set up

    Not much. After my truck being out of service for a while, I needed pellets and propane. I hooked up my dump trailer, put some empty propane jugs in the truck, filled up two 24 gallon and three 5 gallon propane tanks, dumped a load of tree trimmings out of the trailer, at the dump, my empty weight on the way out of the dump was 10,000 lbs., bought a pallet of wood pellets (bringing the estimated combined gross weight to 12,000 lbs). Then I ran it up and down the hills, close to my house, from Sumner to Bonney Lake on hywy 410 and then Puyallup fair grounds to the top on hywy 512, before heading home home. She pulled the hills pretty effortlessly, I could accelerate, in the middle of the hills, at will. Gauges showed only 10-15 lbs of boost needed. EGTs looked great. I know pressure is the result of a restriction to flow. If I am remembering correctly, the boost pressure numbers I'm seeing now are actually lower than what I used to see. I didn't think adding a second turbo opened up the exhaust, and reduced air flow restriction. I don't see how this project, reduced any restrictions, to increase flow, thus lowering boost pressures? I had set the external waste gate, to open, at about 18 psi, so, that is not even opening yet, at these boost pressures. These numbers surprise me (if i'm remembering correctly). Either way, she is running/pulling real strong.
  3. Drooling Piston

    Builing a compound set up

    Now that I have driven her a couple times, made a few adjustments, and discovered my exhaust pressure gauge has officially retired. I can say I didn't quite get what I was hoping for. It was a fun project and I'm glad I did it. It kept me at home and tinkering for the last couple months. I will have to replace my exhaust pressure gauge before I can effectively do much more tuning. Tightening up the external waste gate or VGT controls could add to higher drive pressures. That would show me higher boost pressures but wouldn't necessarily mean better flow of air in and out of the engine. I was hoping to get a few pounds of boost quicker and lower in the RPMs, so that after each shift, or when cruising around at 1700 RPMs (not loaded) there would be more willingness to really "take off" from that point. It does feel a little peppier in that range, than it did before, but not ready accelerate hard. Where I do really feel the difference is at or above 2,000 RPMs. When you stab the throttle while she is up there, she pulls hard and fast. Since I built this primarily as a towing rig, when needing any amount of pulling power, I drive her in the 2000-2300 RPMS range. Since that's where the power comes on, I think it will do me well for that. I'm still a few months away from any planned trips, towing over a mountain pass, I expect it will feel much more effortless to do so, assuming the boost air temps are NOT considerably higher.
  4. Drooling Piston

    Builing a compound set up

    You are right about that! I don't know why is was leaking around the compressor wheel but now it has stopped. Maybe an older seal, that sat on a shelf for a few years, needed some run time to get moistened up and start sealing again? I ran her like this several times and didn't see any more oil. https://www.facebook.com/joe.barczak/videos/2202571479807577/
  5. Drooling Piston

    Builing a compound set up

    When tearing into things to find the reason for the oil leak, this sure scared me. I thought the turbo seal has let go and was slinging oil from behind the compressor wheel. What I did find was, I missed a piece of the old gasket on the oil drain adapter surface. I cleaned everything real good, put her back together to this point, and started her up to recheck for a leak. I didn't see any. I'm not sure how an external leak on the outside, allowed oil to get to this point on the inside? I finished putting her together, this copper line comes from the exhaust manifold, goes to a small finned cooler the rubber lines goes from the cooler to a filter (the black tube with the white arrow), the goes to a T, with a drain on the bottom, on top is another T, the rubber hose on the left goes to the air cylinder to push the VGT open, the other side goes to a pressure sending unit, so I can monitory the back pressure in the exhaust. Put the front tires on and took her for her first drive. Conditions were not great, 38*, raining and more traffic than I wanted on the highway. At first I didn't feel much difference. Then I realized with the extra air she will need some more fuel. I flipped the switch on "idiot" mode on the AFC Live 2, coming back up the hill, on hwy 512 by the puyallup fair grounds, doing about 65mph, at 1800 RPMs, I stabbed it to the floor and she broke the tires loose. That surprised me. To slow down the acceleration, I will hook up my dump trailer, put a ton of wood pellets in there and doing some driving around. then I can tune the AFC Live and get a better feel for how things are going to work.
  6. Drooling Piston

    Builing a compound set up

    She finally made noise and smoke yesterday. after idling in the garage for a few minutes, I noticed some oil on the floor. It looks like the oil return, on the top turbo has a pretty good leak. I used JIC (or AN) #10 adapter and hose fittings. I can't rotate the return hose at all, so I don't think I left the fitting loose. anyway, it will require pulling intermediate boost pipe, final boost pipe and HX35 compressor housing off to get under there and see what is going on or put a wrench on that fitting. The adapter, that mounts to the turbo, and has the male JIC #10 fitting sticking out, is a pretty light weight aluminum part. I wonder if it has a crack? From what I can see, the oil is not coming out from between the adapter and the turbo. I'll get on it this weekend.
  7. Drooling Piston

    oil supply for a 2nd turbo

    Thanks for all your input!
  8. Drooling Piston

    Builing a compound set up

    I got a little more done this weekend. the air cylinder that will be the actuator in installed and has the boost line plumbed to it. I put oil & coolant in it and pressure tested the cooling system. No Leaks. Installed the air filter box & intake piping. Re-routed the battery cable down to the starter (that is on this side). Things are getting pretty crowded now. I still want to install these, to cool & filter the exhaust gas that will go to the other end, of the air cylinder to push the VGT open and go to a pressure sending unit, to monitor my exhaust back pressure.
  9. I'm fabricating my own set of compound turbos. My question is, Will it work OK, to put a "T" in the original, turbo, oil supply port? Will that provide enough volume of oil for both turbos? OR should I remove the plug and use the other port that is on top of the filter head to supply oil to one of the turbos? Thanks for your advice!
  10. Drooling Piston

    Builing a compound set up

    That’s a good idea.
  11. Drooling Piston

    Builing a compound set up

    I didn’t know there was a difference between those ports. So putting a T in one seemed the same as using both. ??
  12. Drooling Piston

    Builing a compound set up

    I got to spend some time in the garage during the recent "snopopclips". I started putting things together. As I was wrapping the heater hoses, I wondered if those hare lines were going to be in the way and present an issue. Sure enough they did. The waste gate actuator hit the heater lines and was not even close to lining up the bolt holes. My other concern was that these heater lines were going to be in the way of my final boost tube. So I moved on to installing the exhaust. I braved the icy roads to go buy 7 feet of heater hose. I replace the existing hose and hard lines with new soft hose from the firewall to the block, with some extra to allow room for the waste gate actuator. Then proceeded to continue bolting stuff together. My location marks were not quite right when I reinstalled the compressor housing on the VGT. I had to reclock it to meet the intermediate boost tube. Now, the actuator linkage hit the outlet of the compressor housing. Other than being in an awkward location to work on, this shouldn't be difficult to fix. Used this to apply shop air to the system to check for potential boost leaks throughout the whole system. It worked OKish. When I applied more than about 10psi, the rubber elbow would swell and get out of shape and even with 2 clamps on the steel adapter pipe, I got nervous about it sliding out and the damage it could do. It did show me that I didn't get some of the boost hose clamps tight enough and showed me I had a pin hole in one of my welds. Now those issues have been repaired. I'm ready to move on to the next steps.
  13. Drooling Piston

    Builing a compound set up

    While waiting for the replacement nozzle for the turbo to come, and the seats & floor were out, I looked into an issue I was having, last fall, with the trany being sluggish shifting into high range. I found the equivalent of an electrical relay but for the air on the trany. up on the shifter, are skinny spaghetti noodle sized air hoses, they send air pressure down to this valve that when the spool shifts, it relays a higher volume of air to the cylinder to shift the trany from low range to high. That valve was acting sticky and sluggish. I took performed some exploratory surgery, cleaned up some gray sludge, lubed it up, re-assembled it, charged the trucks air system with shop air, and it is working perfectly again. While the seats are out, I ran some wiring and installed a new boost gauge, a 2nd one, to measure pressure between the turbos. I painted the cold pipes, compressor housings, and brackets, put header wrap on the exhaust pipes, put some reflective, foil backed insulation around the AC receiver tank too. The new nozzle for the turbo arrived, I re-assembled the turbo, and finished making the air cylinder actuator brackets. This is in the closed or exhaust brake position. This would be in the wide open or bypass position. It is feeling like I'm getting close, all the "hard to figure out" stuff is done, now it will be pretty much bolting things together.
  14. Drooling Piston

    Builing a compound set up

    Sweet, that is close. I live near Huwy 512, at the canyon rd exit and work in Fife.
  15. Drooling Piston

    Builing a compound set up

    Super! if u do have it, what town are u in?