Hi,

A little history:
My Evo had a spun rod bearing, so I decided to pull the motor out and take the whole long block to TurboTrix (I had good success with them in the past with few Subaru engines), and knowing Keith & Mark as stand up guys I decided to take the motor to them, after telling them what I'm going to be using the car for (track days, ice racing), they suggested going with 2.3L stroker.

I had my block done, ACL Race bearings, Manley I-Beams, Crank and Pistons, balancer shaft delete, SuperTech Valves, Springs and Retainers, Oil and Water Pump.

They suggested using Valvoline 20w50 Dino oil for break-in, which I've been using, but with rather high oil consumption, initially about 1/2qt every 100 miles; initially I thought nothing of it, as it probably just breakin-in.

Right now it's using I'd say little less, as I need to add 1/2qt every 200 miles, but now I have about 2500 miles on the new engine and this is what I tried so far:

1) Pulled off Turbo and Manifold, looked at valve stems and exhaust ports for any signs of oil residue, there were none.
2) Looked at exhaust side and charge side of the turbo, no oil.
3) Took off intercooler, no oil there.
4) Took off intake manifold, no oil.
5) Changed the PCV valve
6) Compression came out 125psi across all cylinders
7) Car doesn't smoke (I would guess if burning so much oil it would?)
8) Never any drops of oil on the garage floor, under the car is dry
9) Spark Plugs are clean
10) Tried different oils Valvoline 20w50 conventional, Valvoline 20w50 VR1, Brad Penn 20w50 next one up is Amsoil ZROD 20w50

Prior to owning Evo, I had a 500whp+ STI, it did consume some oil (1/2qt every 3k/miles), but not as much as my Evo, everything is stock in it besides the built motor, otherwise running stock turbo.

It's becoming a bit tiresome to have to tap it off every 200miles (not even tank full), and I can't seem to figure out what is going on, is the motor built lose or what is it. I moved so I'm a lot further away from TTR so I can't just take the car to them, what they suggested so if anyone has any more ideas, that'd be awesome.

thanks in advance

 

Anyone?

 

Have you asked the guys at TurboTrix (since they built your motor) for a possible explanation?

 

Since you have already tried several different motor oils, I would say that your oil consumption problem is not due to the brand of oil that you are using. So, you probably won't be able to solve the problem by switching to yet another brand of lubricant.

 

Is it tuned? What kind of power? Sounds like you need a better breather system.

 

Yes, it's just been tuned recently at CBRD (300whp and 330wtq) @ 24psi. Can you please elaborate on the breather system?

 

They said to bring the car and as I mentioned in my 1st post, I moved and they're much farther away, but I wont have a choice if I can't solve the problem.

 

Might not help, but I decided to give it a try anyway, I added LUCAS Oil Stabilizer and going to monitor the oil use. If that would prolong tapping oil off to 1/2qt every 1k/miles I'd be very happy.

 

i had a bad oil burning problem is was my intake valve stem check it out

 

I have a turbotrix built 2.3 as well. Mine uses a little bit of oil too. Im working on a catchcan setup as we speak. Im thinking I blow a lot of oil out of the breather and the pvc, back into the intake. I have a Saikou Michi catchcan setup installed, just need to order some lines.

I was worried about my oil consumption too, but reading around, it seems like some of the best built motors go through some oil as well. Im not terribly worried about it as my car still runs like a top.

 

Good idea, I'll take a look at them next.

Wouldn't that cause excessive smoking? May I ask how much is a little of oil consumption in your case?

My engine also seems healthy and take some abuse (high revs and constant boost), but that high oil use is just driving me nuts.

 

Where in PA are you?

 

Im in 18610

 

I hate to ask this and I was hoping that someone would mention it over the past few days. But I remember when I built my first stroker I didnt know what the fourth set of rings were and also noticed that they were gapless. I figured they were just an extra set and didnt see any special instructions concerning them so I didnt install them. Without the fourth ring on the piston oil was allowed to get past the machined out portion of the floor of the oil scraper for the wrist pin relocation that stroker pistons have. I'll never make that mistake again as she burned the same amount of oil you are talking about and coked the pistons up pretty good. This ended up dropping the octane level a bit which caused some knocking under big boost situations. I asked the guy to bring the car back to me and I installed the rings after cleaning up the pistons and replacing the head gasket and viola! No more burning oil! None! Ask them about it....because I used Manley pistons in that stroker too.

 

That's a thought, I will definitely give them a call tomorrow and query Keith on it, but I'd figure since they built so many engines, they'd know to include that oil ring. Thanks.