Subaru Enthusiasts Car Club of the Sierras - View Single Post

ScottyS · 2008-07-19, 08:45 PM

OK, I figure I better put my tech questions in the right place, and since I may have several over time, I will put them here and update the first post as they come and get solved. Yes, I am trying to not clutter the board with my basics...

The background and relavent details are in normal text, whereas the essence of the question is in bold. This is done primarily for future researchers. If you answer, please look at the details as well, thanks.

Questions:

1) The Legacy Central forums say that there should be no issues with running lean if I bolt an intercooled TD04 in place of the stock VF11. The sizes are pretty similar, and I will not be turning the boost up. I also figure that the limitation (at whatever boost threshold) will be fuel availablity. The other forum says that for my motor and ECU this means around 12psi, while stock is 8psi. At that point a fuel pump, and possibly injectors are needed, as long as the fuel cut has been disabled/modified. I am under the assumption that the stock ECU will be able to read any increase in air intake from the newer turbo design and adjust the fuel and BPV accordingly - does this sound reasonable?

Answered:
The STi exhaust that I have acquired has the o2 sensor much farther back than the stock location. This means that the wires need to be extended. An internet search tells me all kinds of things, but there is a school of thought that says tampering with the wires is bad. Has anyone ever extended the wires/harness for an o2 sensor? Long term results? Cory says splicing works fine, sweet!

"3-bond", this is some sort of gasket/sealant for an access plate on the rear of the engine block. Can I use regular Aviation FormAGasket or silicone or something? Sperry say Permatex "The Right Stuff" is the answer.

Does removing heat shields from the manifold, up-pipe, and turbo area sound like a really bad idea? Did Subaru over-engineer to make us sound tinny? Consensus is that most heat shielding is a good thing.

Thanks for the time, I am a complete ignoramus when it comes to forced induction and the side effects (including the wallet draining). No doubt more to come, and I will update with results.

2008-07-19, 08:45 PM	#1
ScottyS EJ205 Real Name: It is real! Join Date: Jul 2004 Location: RNO Posts: 2,367 Car: 1998 Impreza Wagon, 1991 Legacy Turbo Sedan, 2003 Nissan Xterra Class: tvFree Yes, I'll fix it for you. Again.	Scotty's EJ22T tech questions OK, I figure I better put my tech questions in the right place, and since I may have several over time, I will put them here and update the first post as they come and get solved. Yes, I am trying to not clutter the board with my basics... The background and relavent details are in normal text, whereas the essence of the question is in bold. This is done primarily for future researchers. If you answer, please look at the details as well, thanks. Questions: 1) The Legacy Central forums say that there should be no issues with running lean if I bolt an intercooled TD04 in place of the stock VF11. The sizes are pretty similar, and I will not be turning the boost up. I also figure that the limitation (at whatever boost threshold) will be fuel availablity. The other forum says that for my motor and ECU this means around 12psi, while stock is 8psi. At that point a fuel pump, and possibly injectors are needed, as long as the fuel cut has been disabled/modified. I am under the assumption that the stock ECU will be able to read any increase in air intake from the newer turbo design and adjust the fuel and BPV accordingly - does this sound reasonable? Answered: The STi exhaust that I have acquired has the o2 sensor much farther back than the stock location. This means that the wires need to be extended. An internet search tells me all kinds of things, but there is a school of thought that says tampering with the wires is bad. Has anyone ever extended the wires/harness for an o2 sensor? Long term results? Cory says splicing works fine, sweet! "3-bond", this is some sort of gasket/sealant for an access plate on the rear of the engine block. Can I use regular Aviation FormAGasket or silicone or something? Sperry say Permatex "The Right Stuff" is the answer. Does removing heat shields from the manifold, up-pipe, and turbo area sound like a really bad idea? Did Subaru over-engineer to make us sound tinny? Consensus is that most heat shielding is a good thing. Thanks for the time, I am a complete ignoramus when it comes to forced induction and the side effects (including the wallet draining). No doubt more to come, and I will update with results. __________________ "Trend Number One is that people aren't getting any smarter." Dogbert Last edited by ScottyS; 2008-09-11 at 07:33 PM.