I know PP gives good gains. I'm having my buddy in town here build me custom equal length headers. It's setting me back $600 but my converters were plugging and it's cheaper then new cats. So i'll see how it does after that. When I do the timing tensioner I'll prolly send the heads out.
I'm looking for about 300hp.
Between the intake, headers, exhaust, chip, port/polish, and cam regrind I should be really close, if not over. So that'll eliminate my turbo need all together.

 

That's about all there is to do on NA cars. Good luck.....get a radar detector...you might need it when all is said and done.
A word of warning though.... PP and headers will improve your throttle response in a huge way. If you're like me and live in a snow state, winter driving could be interesting.

 

I've already got the response problems with the CAI. Just gotta adjust. Headers will be done this week.

Just gotta find a way to fake my ecu so it doesn't realize i have no converters. Having my chip reflashed would prolly work.

 

I "had" a weapon-R CAI for my 2.7L. piece of isht!!!!!
1. didn't do what it's supposed to
2. the filter cone broke off (it was mounted right) cuz the "coupler" from cone to pipe is plastic. the plastic pieces got sucked through the throttle valve and into the engine. almost blew it up. i found three pieces inside, and 2 big chunks at the stuck-open butterfly valve.
went with a $30 intake and it's way better. The only thing i kept from the weapon-R was the cold air pipe. I snaked it down to behind one of the new foglights i put in. works great.

My engine has been runnin just fine for 8 years now. got 120,000 miles on her and still goin strong. guess I'm one of the lucky ones, from what I've been hearing.

About upgrading the 2.7's hp:
my buddy keeps tellin me to just put a neon SRT motor in it. That's a pretty strong engine, and from there i cud just upgrade the turbo. the smaller engine will make lots of room to work with. I'm seriously considering it.

 

I've thought about that but that takes the fun outta tuning what ya got.

My Headers are done and on. Noticed the power difference right away and until I retune the system for the lack of converters its not running at its peak.
Now getting that solved is my next issue.

Any ideas on fooling the ecu so i get get outta this rich fuel curve and get the rest of my power?

 

You have a "closed loop" efi system. You should be able to reprogram the ecu for "open loop" operation. Early efi systems ran like this. Basically, instead of taking readings before and after the cat, the computer will only take a reading before the cat. I don't know what is involved, though. The other options that you have are... Get a high flow cat($$$), or try to find a terminator for one of the O2 sensor connectors(This will always send a neutral or clean running signal). A buddy of mine made one for his F150.

High flow cats don't rob much power, they may even improve the low end torque. You would have to go this route if you have to pass a yearly emissions test.

Converting your "closed loop" computer to "open loop" will also be time consuming and costly. You would need someone who really has a handle on efi systems and a lot of programming knowledge. High end tuning shops have these kinds of people..... but you better be ready to break out the Benjamins.

In terms of the O2 terminator.... O2 sensors are, at heart, resistors. All you need to do is find out what the clean running, at temperature resistance is across the sensor, and make a plug to connect it. Sounds simple, but you may end up with problems if the sensor is heated(4 wire). You will also need parts that can handle the heat and vibration of the car.

Long story short... There are ups and downs to all of these. Your problem is figuring out which one will work for you.

 

Extending the O2's outta the exhaust flow worked to get the readings back to factory. But the ecu still recognizes the lack of converters. As far as I've found it's running and adjusting fuel curves like it should. I'm just stuck with the CEL. No matter to me.

 

can we reopen this thread on the 2.7 liter v6 i just aquired one . can i use kight bulbs to act like o2 signals?