Over the 16 plus years of Incon ownership, I've really enjoyed the kit for everything except the passenger side turbo oil scavenging. No matter what, at least once an oil change it would leak oil in the exhaust and the car would go into mosquito fogger mode. Funny thing is it rarely did it with a fresh oil change but after 3k or so, the oiling problem would show it's ugly head. I tried a few things like fine tuning the oil restrictor and re-routing and replacing the line to the scavenge pump, all to no avail. It took the fun out of it eventually and I drove the car less and less. Well after some crazy life events, I decided I need to enjoy my toys more and I set out to do something about it.

Looking over the original Incon installation instructions, they show a catch can at the oil drain which my car didn't have. Tom Porter of Incon fame told me way back when that they didn't do much so they weren't installed. He also agreed that oil control was the Achilles heel of the kit.

A few years back, I picked up a spare kit that was mostly complete including the catch cans. I planned to install them, or at least install the one for the passenger side because I figured I need to see for myself if they do anything. They had to be there for something like to cache the oil for the scavenge pump long enough for it to catch up, but for aforementioned events, I never got time to test the theoryt. Sometime last year, before this covid bullshit, I put the car on the lift to get serious about it and studied the system. It was setup pretty much like Incon designed it. 8AN line from the pass turbo, through the suspension and ducting to the scavenge pump at the lower radiator support. The line snaked up and over the sway bar and I figured this was a bad deal, not to mention the amount of line between the turbo and the scavenge pump. No matter how I routed the line, I couldn't get it going downhill without lowering the pump and even then, the line would be under the sway bar and just too vulnerable for a street car.

Since everyone who can run a gravity feed uses 10AN to the oil pan, something not possible in my setup, I decided the only way to improve the situation was move the scavenge pump closer to the passenger side turbo and reduce the plumbing as much as possible. My hope was to get a kind of gravity feed to the pump and though I got close, it still has a slight bit of uphill to the run. The line is short enough that it doesn't seem to matter. After several drives, I've experienced zero issues with oil. I'm going to start using the car as my daily once again... Really happy that's this mod has gone as well as it has so far. The next step will be to wire in an ELK-960 delay timer so the scavenge pump runs 10-15 seconds after the engine is off to get the last bit of oil. Doing that manually now.

So here's the pics of the original situation and how I rerouted everything. Note the drivers side turbo is high enough that it is above oil level and the drain line is downhill all the way and was never a problem (by the looks of the inside of the exhaust). I have high hopes this is a long term fix and I'm posting in hopes that it will help my fellow Incon guys out there, however few there are these days.



The original scavenge pump location ... long way away from the problem turbo. Note the AN lines are disconnected and hanging... not the best pic


Bracket fabricated to bolt to the oil pan rail. easy fab job


original Weldon clamp fitted. The bracket fit well and was easy to make. If they'd only done this in the beginning!


I used nutserts to make mounting easy. Had to trim for oil pan clearance ... this is version 1 of the bracket


Aeroquip fittings setup. Note the 180 is for the return


the short run between the pass turbo and new scavenge pump location. I think the win here is keeping the line SHORT


line fabricated..


Routing all but done. I shortened the return line so it has a straight shot to the pan and doesn't do the 180

I'll update this post if there are any necessary changes but for now all is well!

-- Andy

 

Nice write up, I am hoping to install my kit soon, I was looking at maybe using a turbowerx pump, because I have no idea how long the one in the kit will last. So the can was not needed/installed?

 

Very cool, glad to see those kits are still kicking around.

 

Thanks for posting up pics of the kit. Very cool! Been considering building something similar on a S10. I don't think I have enough room down that low for the turbos I have.

 

That car and kit looks like it has some miles on it, that's a testament on its own.

 

I can't comment on the kit pump but I have two Weldon 9200-A and traded the original one out after putting 60k on it. It was working fine but I was going on a 2500 mile round trip and didn't want that to be an issue. The Turbowerx looks like a step above the Weldon so you'd hope it would last a long time.

Thanks! I bought the kit because I believed in the engineering. The only problems I've had were in oiling which I partially fixed with a check valve from mcmaster, a restrictor and now the relocated scavenge pump. Seems to be doing the trick so far.

The only thing I miss with this setup is showing off the turbos... "yeah, they're down there if you look"

Its done well at 7-10psi... looking to drop in a L33 this year sometime and turn it up!

-- Andy

 

I appreciate the write-up as I'm having the same problem with my Incon kit which is still going strong. The oil pump is about to go out so I'm going to check out these weldon pumps but also look at the turbowerx. Glad you got this figured out....tired of cleaning the passenger intercooler/piping!