nismo3183

iTrader: (1)

My car has been smoking excessively since I put in the new motor. A couple of facts about my setup are list below.

A very reputable show rebuilt the lower end with wiseco 1400 9.0:1 pistons, R&R rods, and a 94mm K1 crank.
The cylinder head was completely redone by GSC when they CNC'd it. S3 cams installed with all supporting hardware.
Turbo setup is a forward facing twin scroll 6466 with the oil feed coming from the oil filter housing. I use fp's oil feed line kit with their inline filter and the return is -12 to an ams pan.
I originally had a Frontline valve cover with two -10 lines going to VTA catch can setup. I now have a factory valve cover again with two -10 lines (valve cover tapped to 1/2, not the smaller press in fittings). Again going to VTA catch can.

Compression numbers are: 162psi 165psi 165psi 165psi for cyl 1-4 (operating temp and injectors unplugged)
Leak-down numbers are: 90/83, 90/87, 90/87, 90/88 => 8%, 3%, 3%, 2% cyl 1-4 (operating temp and injectors unplugged)

Fuel is primarily E80-85. 93 is used once in a while

I use Brad Penn 20w-50 exclusively

The hardest the car has been pushed so far is during tuning and all pulls done in third gear to 8500 rpm. Car sees as much as 48psi tapering to 43psi and has made 850+ using virtual dyno.

Log shows the car is knock free throughout the entire power band. During tuning, I believe if my memory serves me right, I saw 2-3 counts of knock for approximately 200rpm one or two times but that was tuned out immediately.

I have attached some pictures of the plugs for reference. Pictures with ground tips pointing to 11 o'clock are cylinders 1 and 2 left and right and ground tips pointing to 1 o'clock are 3 and 4. Picture of all four plugs are 1-4 left to right.

I notice it is worse when the engine is hot. It is hard to tell but it does not look like it smokes when boosting. I believe it is the worst when at idle and decel.

Hopefully someone can chime in with some help
Thanks for looking

LetsGetThisDone

iTrader: (1)

Either valve seals or turbo. If it's the turbo, it's likely the VTA catch can setup isn't getting rid of enough crank case pressure.

nismo3183

iTrader: (1)

For reference, the valve seals are the Viton valve seals that GSC sells and installs in their cylinder heads.

Compressor housing and intercooler piping are bone dry. Turbine housing and downpipe are oil free as well.

RightSaid fred

If it's a new build and has always smoked then maybe the block has been honed wrong.


If you don't have a proper PCV setup , you'll get fuel contaminating the oil then you'll get more problems.

nismo3183

iTrader: (1)

Have you ever seen a better pcv system on a forward facing setup?

barneyb

An extremely high power engine is not ever going to act like a sedate Corolla engine. They are two different things.

nismo3183

iTrader: (1)

I never said it would. I have never seen even heavily modified Evo's smoke like this.

4G63_EVO

iTrader: (4)

how much smoke we talking? Got a video?

mines5

"VTA catch can setup isn't getting rid of enough crank case pressure."

That's your problem. Unhook one of the catch can lines and go for a ride.

nismo3183

iTrader: (1)

I disconnected both lines from the catch can and let the engine warm up. I notice some crankcase ventilation from the lines but it doesn't feel excessive at all. Once the engine oil was somewhat warm I get smoke.

Pulled plugs and immediately noticed smoke from cylinder 1. Cylinder 1 had about 1 tsp of oil in it . Did a compression test and leak down test and the results are the same as the first post. The oil in the cylinder could be giving me higher results. This isn't looking too good.

mines5

Oil on plugs. You know now what is wrong. The worst feeling ever.

nismo3183

iTrader: (1)

I'm going to do a compression test with the motor cold and see if the numbers are really close. If the compression is really close I'm going to assume rings are good. I'm going to replace the seals and see if that does anything.
Maybe I'm being a little hopeful but it's worth a shot of the compression numbers line up cold/hot.

mines5

Just a thought. Did you check the oil level, over fill perhaps?

nismo3183

iTrader: (1)

I did check it. I actually drained and filled it and filled it up in between the low and high mark. It's an ams pan too

nismo3183

iTrader: (1)

Here are the results of compression and leak down again. Leak down was done warm with no oil in the cylinders. This time I have cold, cold with a cap of oil in the cylinder, and hot for the compression test.