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Old 06-10-2020, 06:03 AM #61
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Starting to question the idea of using the turbo timer. Seems that other folks who do rear mounts (other cars, not 4runners) often just run a check valve after the turbo. Thinking about doing a 90 deg swivel fitting out of the turbo and then a check valve.

Think that would work? My only concern is that pressure of the oil pushing back on the check valve from unreturned oil would be greater than that trying to push out of the turbo and would end up not draining the oil from the turbo after turning the vehicle off.
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Old 06-10-2020, 12:39 PM #62
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My concern is just as much about the leftover oil in the feed line filling up the turbo as it is with the scavange pump outlet draining back into the turbo.

Delay-off relay: 12V Adjustable Delay Timer Relay (Delay ON/OFF) | 12 Volt Planet (I'm sure you could find something stateside)

Oil drain sump:





It uses both a drain to the pump and a vent to the oiling crankcase vent system (so avoid negative pressure on the turbo).

-Charlie
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Old 06-10-2020, 07:50 PM #63
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Quote:
Originally Posted by phattyduck View Post
My concern is just as much about the leftover oil in the feed line filling up the turbo as it is with the scavange pump outlet draining back into the turbo.

Delay-off relay:
(I'm sure you could find something stateside)

Oil drain sump:

It uses both a drain to the pump and a vent to the oiling crankcase vent system (so avoid negative pressure on the turbo).

-Charlie
A simple relay like that is really ideally what Iíd like to do. I donít need anything super complex.

Iíve been googling around all day looking for a ďrear mount oil sumpĒ to no avail. Is there any reason an oil catch can couldnít work? Put the inlet from the turbo in the top connection and the scavenge pump on the bottom connection? That would give the delta in height between the two for oil to fill up once the cars turned off.

I think Iím the meantime until I really figure out which way I want to go, Iím going to wire it to something that gets power in the ACC position and just sit there for a minute and let the pump do itís thing. A very manual turbo timer, lol.
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Old 06-11-2020, 12:34 PM #64
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Quote:
Originally Posted by Myrunr2010 View Post
A simple relay like that is really ideally what Iíd like to do. I donít need anything super complex.
It'll be a challenge to find something off the shelf. And it is a 'refinement' sort of thing. You'll quickly find out how much of a problem it is, and a little oil past the seals isn't the end of the world - just annoying/scary if you don't know what it is.

A small catch can might be perfect. It'll have 3 ports to use, which is ideally what you need (oil from turbo, vent to crankcase vent and drain to scavenge pump). Get the rest of the system up and running and then go from there.

-Charlie
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Old 06-13-2020, 08:56 PM #65
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Oil supply/return lines are in. Took me a good part of the day.

The ďtĒ adapter I ordered from eBay didnít end up working, and I didnít want to wait around for more parts, so I ended up just tíing the supply from the same place as my oil pressure gauge (the port next to the oil filter).

Instead of the turbo timer I ended up going with a DIY catch can that I was able to just hose clamp to the frame. Iíve not driven it a bunch yet as a proof of concept, so Iíll have to keep tabs on it.

The exhaust is a lot louder than I was expecting it to be. I ran the truck (at idle) before putting the muffler and rear of the exhaust on...they donít really quiet it down, although I donít hear the turbo the whistle, which was the goal with muffler.

The scavenge pump is loud, Iím sure Iíll get used to it, but whew. I wired it to the cigarette lighter, so it turns on when I put the key in ACC, and I can leave it in ACC when I turn it off if for some reason my catch doesnít work out.

Just need to source my intake and charge piping now and Iíll be making boost. Maybe Iíll get stuff ordered tomorrow, weíll see.
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Old 06-20-2020, 03:41 PM #66
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Well, wish I had a ďman, she really ripsĒ type post, but I donít, lol.

Everything is connected and hooked up, Iím just not generating any boost. The first run out I got no boost. I realized I needed to adjust the waste gate, which I did (it was set to be half open all the time). Second time out it hit 6psi, but it didnít start generating boost until like 3000 rpm, and that was only once. After going up and down the road it really only hits ~1psi. Iím wondering if I need to adjust/do some stuff on the waste gate some more.

Additionally, the AFRís are all over the place, especially at idle, jumps from 10 to - - -, then back to 10. If Iím not careful itíll shut off and I have to restart it. Is it safe to assume that this is perhaps the ECU ďrelearningĒ or is it possible Iíve already jacked something up?

Also, my oil sump seems to be working as far as letting everything drain back into it, however, i noticed yesterday that it had a small leak going on. I took it off and used some epoxy on it, weíll see if it holds. If not Iíll have to re-evaluate it.
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Old 06-21-2020, 08:05 AM #67
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Looks like the cheap pipe clamps that came with one of my fittings came off, causing a boost leak, which would explain the lack of boost and weird symptoms. Running good now! Need to do a boost leak test at some point, apparently that can explain why there is lag in it generating boost (since I was expecting it to start generating boost around 1500-2000 in lieu of 3k).

It’s running and producing boost though, so I think I’m going to lick my financial wounds (spent closer to 1300 total in lieu of the expected 800) and enjoy it for a little while.
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Old 06-21-2020, 09:16 AM #68
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I ended up just running flexipipe for the intake back to the turbo, now that I see how it all runs, Iíll probably slowly replace it all with silicone fittings and actual piping.
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Turbo Build-eb5ba72c-8a3f-4924-9db7-0c933e3a91c2-jpg  Turbo Build-aeb6d32b-ac28-48c7-a448-c6e4e99a33e6-jpeg 
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Old 06-21-2020, 03:25 PM #69
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So overall how do you like the drivability of the turbo?
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Old 06-21-2020, 06:48 PM #70
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So overall how do you like the drivability of the turbo?
I think I may still have a boost leak somewhere, so I need to order a tester to give it a once over. I also need to order two t-bolt clamps too to replace band clamps currently installed. That being said, I still have some kinks to work out.

My only other experience with boost is with a supercharger on my MR2 (which actually has an electromagnetic clutch that engages/disengages based on cylinder pressure). So Iím still kind of learning the difference, since a SC is pretty much power on demand. Although if I start to build boost and hit the max around the range that clownmeat does, it should pretty much be boost on command.
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Old 06-21-2020, 07:01 PM #71
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It will be interesting to see how this works out for your 3rd gen 4 runner. Curious to see if you get close to the power of the 4th gen and 5th gen 4 runners. I know the SC 3rd gen do, at least a stock 4.0 4th and 5th gen. All my turbo vehicles have been faster than the SC version under the same build and psi. So keep going I enjoy watching your progress.
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Old 06-21-2020, 09:03 PM #72
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Glad to hear it's up and running! You'll get it smoothed out in due time for sure. I can't remember though, do you have the ability to tune it or are you at the mercy of the stock ECU?
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Old 06-22-2020, 05:16 AM #73
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Glad to hear it's up and running! You'll get it smoothed out in due time for sure. I can't remember though, do you have the ability to tune it or are you at the mercy of the stock ECU?
Mercy of the stock I believe. Iím not sure there is a need to tune it though. The TRD supercharger runs 7psi with no fuel mods or tune.
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Old 06-22-2020, 09:06 AM #74
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The accordion hose is probably making the turbo work harder - especially at that length
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Old 06-22-2020, 11:52 AM #75
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The accordion hose is probably making the turbo work harder - especially at that length
Agreed. I want to get my charge lines checked for leaks then Iíll start working on replacing that with some hard line. It certainly makes it easier to determine what types of piping/fittings Iíll need though.
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