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Old 11-27-2007, 09:27 PM   #261
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Are the innards of the turbo still good? Also, are there listings for OE oil pipe sizes?
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Old 11-27-2007, 09:27 PM   #262
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that sucks dude. is there any warranty?
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Old 11-27-2007, 09:35 PM   #263
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Quote:
Originally Posted by radomirthegreat
Are the innards of the turbo still good? Also, are there listings for OE oil pipe sizes?
I am running a -4 oil feed and -10 return. The oil return goes into the oil pan below the oil level in place if the "low-oil" sending unit. I was concerned about this, but the Cartuning turbo kit has the same exact fitting and noone has ever reported a problem with it. The return line goes pretty much straight down for about 12" then at about a 45* angle down to the pan. It is 3ft long, so iIt should be plenty of "run" to keep it draining good. I probably need to put a restrictor in the feed line. A BB turbo does not need alot of oil anyway. I just hope the seal isn't damaged.

I am going to pull the turbo and see what'* up with it. I'll report back later........
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Old 11-27-2007, 11:18 PM   #264
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Well, since I plugged the pcv holes and made no other provisions, I am hoping crankcase pressure was to blame for insufficient oil return. I put the pcv in the oil cap (drilled a 1" hole, used a grommet and stuffed some foam in the cavity to filter oil splash) and the turbo now spins free even with no intercooler to t/b pipe. Before, the turbo turned real sluggish if at all. There is a definate change in alot of things with the pcv hooked up. I still have alot of smoke, but I am hoping it'* just oil in the pipes. Since i am running really lean, the idle is really high. I am programming right now back to the stock MAF tables to hopefully rectify the lean situation (I have not made a jumper harness yet for the MAF to the remote LS1 MAF and I had already put the LS1 MAF tables in the program)

Once that is done, I will let the engine idle for a while and hopefully clear out the pipes and have no more oil passing the turbo. I shimmed the oil pump pressure regulator spring so I have about 80psi cold idle. I thought maybe that was too much oil to the turbo, but I have run over 100psi in racing turboi applications and never had a drain issue like this. I disconnected the oil feed and put a guage in the line, partly so I could run it and also to see the pressure. Before I fixed the pcv, oil actually bubbled UP AND OUT the top of the turbo oil inlet!!!! Definately a problem there! After I hooked up the pcv, that didn;t happen anymore. So, I think it'* fixed........
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Old 11-27-2007, 11:24 PM   #265
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Yeah so I am a sophomore in Mechanical Engineering at Penn State University and I would like to say you are pretty much my hero lol. :P
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Old 11-28-2007, 12:50 AM   #266
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Yeah so I am a sophomore in Mechanical Engineering at Penn State University and I would like to say you are pretty much my hero lol. :P
No, no, no... Not even close to hero status. I will accept "Fabrication Guru", "Mechanical Whiz-Kid", or "Project Visionary", but definately not a hero in any sense of the word.

Thanks, though. I appreciate it.

The turbo appears to be a problem. It is still leaking oil. I can't get the engine to idle down, I think I still have a vacuum leak somewhere. Soon the i/c is coming off and the */c going on by itself and screw the turbo... this is really pissing me off, bad.

The engine was incredibly lean on the 65# injector program, like 20:1, but it will idle around 900rpm. I put in the stock fuel inj rate and it runs 14.5-15.0:1 at idle, but at that a/f, it idles at 3000rpm.

And tomorrow I start my third day of jury duty B.*. I think this is NOT what the founding fathers had in mind for jury selection. Sitting around all day being weeded-out by the attorneys.
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Old 11-28-2007, 11:17 AM   #267
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What modifications did you do to be able to run the intercooler below the supercharger?

Because you may want to try bolting the supercharger straight up and see if you still have a vacuum leak. I know the wood is hard wood and was kiln dried, but there'* something fishy about that intercooler that just some how rubs me the wrong way.
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Old 11-28-2007, 11:28 AM   #268
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pontiacjeff is crazier than I am...
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Old 11-28-2007, 12:11 PM   #269
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Quote:
Originally Posted by jbmark33
What modifications did you do to be able to run the intercooler below the supercharger?

Because you may want to try bolting the supercharger straight up and see if you still have a vacuum leak. I know the wood is hard wood and was kiln dried, but there'* something fishy about that intercooler that just some how rubs me the wrong way.
No mods needed, other than to block the pcv holes. It is sandwiched in b/t the */c and LIM. Being wood by itself does not mean it is the cause of vacuum leak. Inspecting it on disassembly THREE TIMES now, the gaskets are crushed all the way around, the pcv is sealed well (I can test this by removing the dipstick and checking for vacuum at the dipstick tube). The only place it could be leaking is around the i/c tubes where they poke out, but there is definate silicone squish all around the tubes. The core is not leaking, I have tested for vac at the tubes with the engine running. I am going to use the smoke machine to leak test the assembly again. I could just have a bad IAC solenoid.
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Old 11-28-2007, 12:17 PM   #270
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Usually when the IAC solenoid goes bad, it won't ever idle down, like it gets stuck at the highest throttle position last pressed. So, maybe you're right, simple as that.
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