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Originally Posted by rogue909
I've done spark plug foulers on the O2 sensors (after cats) to trick engine (laminar air flow, its suppose to help, and it was a cheap mod.)
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This is a bad eco mod.
This is a trick used on post converter oxygen sensors to trick them into reading the exhaust as being leaner than it really is after you gut the converter.
If you do this to your primary oxygen sensors then it will cause them to read lean and tell the computer to add more fuel.
*Note: As long as your catalytic converters are fully functional leave them alone.
Quote:
Originally Posted by rogue909
I've heard the first things to do is a new air intake. I've looked around and I see 4 big categories, standard CAI (like K&N), ram air, super and turbo chargers. I've heard super & turbos actually hurt mileage (they also cost 40% of the value of my car, lol). So what is the break down of ram air vs the standard K&N air intakes? I'm hesitant with the ram air because it will require me to modify the hood of the car, but what are everyones experiences? Is the ram worth it?
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Out of your 4 big categories you left out the warm/hot air intake.
People installing CAI, K&N B/S, ram air, super charger or turbo charger on daily driven gasoline powered vehicles are going to part of your immature go fast crowd.
Forget everything they ever said.
I think the ideal intake for a hard working gasoline powered vehicle would be a switchable warm/cold air intake. And no you cant go out and buy one, you will have to build it.
Quote:
Originally Posted by rogue909
Regarding the exhaust, I've heard that the majority of vehicles (suburbans in particular) have a wide enough exhaust that you should save those for last. So thats what I plan on doing. Although I am curious what people have paid to have their pipes redone.
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It cost me about $100 to do the duel 2.5'' pipes back in 2008, then about $50 to put the all stainless steel 3 inch down pipe and 4 inch straight pipe on when I turboed the suburban this summer.
I did all the work my self, and used scrap yard stainless steel this last time.
Install instrumentation and see if you have a back pressure problem. Thats what I did and saved the exhaust mod for last and didn't expect any gains when I did it.
When the turbo went on it had to have a whole new exhaust.