sublimed

I知 doing a fitech tpi conversion. Currently I have a good running tpi to start from. I plan on going to a HSR, long tubes, and cam swap down the road.

From what I understand if I just disconnect the EGR solenoid the EGR valve will remain closed. I do not want to have to buy a delete plate just to move over to the HSR when I知 done.

same with the air system. If I just leave the wiring disconnected will it always be injecting into the headers? The cat already has the hose deleted. it will mess with the O2 sensors if it is injecting air. I can also just get some caps at the store.

Vader

Diverting air to the manifolds/headers will affect the oxygen sensor reading, the proper mixture control.

If the vacuum source to the EGR valve is isolated, the EGR valve should not admit any exhaust gas unless the valve is damaged. If the electrical connector to the EGR solenoid is disconnected the same thing should occur, but a solenoid valve leaking through can admit some vacuum to the EGR (rare) and disconnecting vacuum solves both possibilities. A working EGR is also not really a detriment, since the cooler combustion chambers can allow for more spark advance in the instant you kick the fun pedal, when the EGR slams shut and ECM takes over in power enrichment mode. .

Komet

FiTech has no EGR provisions, thus the need for the delete. I'd pay the money for the delete plate just to free up space, you can then route the FiTech harness underneath the plenum for a cleaner look and less junk on the passenger valve cover.

sublimed

I'm going to do the delete plate. I also forgot the IAT sensor was down in that area, and I would have a hard time getting it unplugged and into the new harness with my bear hands. I was just trying to limit anything else changing to expedite troubleshooting is anything doesn't work as expected.

TransamGTA350

iTrader: (2)

I would not run the AIR system into the headers all of the time. As already stated, it will affect the O2 sensor reading. It can also cause the headers to run hotter since you are injecting oxygen into the hot exhaust gasses and inducing a secondary burn of any unburnt hydrocarbons. If you aren't going to connect the AIR tube at the cat, then I would just eliminate the AIR system altogether and cap off the AIR tube connections to the headers at the check valves with rubber caps and hose clamps, or remove the individual AIR tubes to each exhaust primary and use threaded plugs.

sublimed

Yeah. The more I researched I will need to disable the air system and EGR. The car runs well with the current setup. It has a 383 Vortec but it took so much work to get it dialed in from the 305. It feels like it could pull a 50ft trailer but just has nothing up top.

If the fitech system does not work out I want the conversion back to the stock ecu to be as easy as possible.

TransamGTA350

iTrader: (2)

Running a TPI setup? There won稚 be much top end, especially with a 383.

Komet

You will also need to figure out how you want to vent the fuel tank; the FiTech ecm has no provisions to control the vent valve.

sublimed

I知 going to just vent it to a charcoal filter. I think you said on facebook that you get a little gas smell but that is it. Do you use a vented gas cap also?

Komet

No I just used a stock cap.

sublimed

I知 going to ditch the tpi for a stealth ram. I think I知 going with a summit 8802 cam.

As of right now we run the stock tpi with a vortec base. The stock cam with 1.6 rockers. The vortec heads are setup for more lift.

When we did this setup we went back and forth with a remote tuner. Then I tweaked it for a little. Finally I found a person locally that tuned these older tpi setups but no access to a dyno. Had to rent dyno time and pay him.