BW S256 Question

[keltalon]

what oil lines are used for this turbo? Are the mitsu style gaskets used for the turbo drain line? should i get oil from the head?

[RipperXX]

Avionixx,
After looking at that log you need to do more tuning, I wouldn't be looking at meth just yet. but you say you were only running 18psi? The Boost est was showing 34.2psi at one point, thats pretty far off. Jump on the Link forums and post that log, and look at the some of the basic's of setting your fuel trims etc. Once it's dialed in you might find you can do more on 91 than you think. Although it is still a major limiting factor..


*Edit*
LoL I knew it, you have a GM MAFT setup like myself, although it seems yours is a bit further off than mine. I still need to dial mine in but it's not as far off as yours. Thats how it goes with the GM MAFT setup though lol some are on the money some are way off, but once that is dialed in that should help a lot. Again check the Link forums there is some stuff posted there on dialing in the GM MAFT setups. And with that much knock for now anyway I would pull some timing untill you get everything sorted out, then you can add it back in latter.

[Avionixx]

That run was done around 20 PSI; I was having a little spiking and creeping there, but it was over 20. I have everything under 2400Hz pretty much spot on, but after going past 3000Hz I noticed the MAFT was seriously off calibration. I'm going to have at it again tomorrow and see if I can get any improvement and post my results.

[thiazole]

No, you're way off at 2000 and 2400 Hz and you are a little bit off at 1600Hz, all showing too much air which is causing you to run pig rich. You are probably running less than 9:1. If you fixed this, you could probably pick up 50+hp. Boost est should only match the actual boost from about 5-6000rpm. Below 5000 and above 6000, boost est should be LOWER than actual boost. Yours it like 6-8psi higher than actual boost above 6000 and at 4400rpm your boost est shows 34psi and your actual boost is 26psi. That means your ECU is adding about 30% extra fuel above what it would normally add which is usually very conservative to begin with. That is probably where your knock is coming from - rich knock.