The oil rings inside the turbo that seal the shaft oil passage from the housing. On the journal bearing type turbos we get from the factory they like having some pressure from the exhaust keeping the ring in place, for whatever reason when the exhaust flows too freely the seals allow oil through to get burned. The typical symptom is smoking at idle. Here is the first picture I came across on google showing what I mean (I didn't write those red notes). The solution from tuners has been to increase the idle by ~200rpm to keep the pressure up some:
We both beat that 5.0 and I'm only ford tuned, the ford tune pulls pretty strong. Blyman93 with full bolts ons and tuned was surprised how long it took him to pull on me!! Blyman93 has a nice car!!
What I was talking about was specifically when you change the downpipe and suddenly get smoke at idle. That is the cause. I don't think its nearly as common with these cars as it is with other brands, this turbo seems a little better built than some cars come with stock. On mazda it is extremely common to get this problem and start blowing huge clouds of smoke at idle with a catless downpipe.
Yeah, it should only gain power but I've always read on these DI cars that you have to tune for the downpipe. I wondered what the reason was, but then again I'm not a tune salesman. How much gains do you think you got? There are some super cheap downpipes out there, maybe I'll try one for science.
Honestly I'm not sure about the gains. It's her car so I do not drive it very much, but it did feel rather strong the last time I drove it at the track. No intercooler yet and we ran on a hot day. IIRC it picked up 2 mph in the 1/8th, but lost 1 mph in the 1/4 due to the heat.
exactly the very first thing I did, once you have a 3.73 and up you cant really go back
Nice, Did you notice a nice kick in power?? Would you recommend getting one?? Also did you have to get the O2 Sensor Simulator thing to not throw codes???
