Arrow PCM and Limp Mode

[ViperGeorge]

Lou Belanger also suggested that the upstream O2 bung could be relocated to the primary which would allow for the wires to be far removed from heat. He says that there is no reason that the O2 in the primary would cause any problems. He used to put them there but so many people thought it was odd and kept asking about it that he changed the location to the collector. He says his testing shows no issues with locating the O2 in a primary and it reduces the delay in reading the exhaust stream so the PCM gets a quicker read. He is thinking about putting bungs in both locations and allowing the user to decide. Generally it is the guys that track their cars that would have issues with the wires. Street guys wouldn't beat on the car hard enough for long enough to cause a problem so if they prefer they could mount the O2 in the collector..

[TrackAire]

The way Mark did it is about as efficient as you can get.

Here is my opinion.......regardless of how you wrap something, eventually if the ambient heat is high enough for long enough, whatever is "wrapped" inside will eventually get hot. You can prove this by doing different types of wraps with a heat probe and putting it in your oven for an hour or so. I look at wrapping as a way to extend the protection time before whatever you're trying to protect gets too hot. More wraps with insulating air gap layers (like the woven sleeve) buys you more time. If something is rated at 500 degrees or 1200 degrees, it does not mean it will keep what is inside of it from reaching that temp...it only means that heat barrier device won't melt or burn at those temps.

Now if you could wrap it like Mark does and put some external air flow to it, then you'd probably be good for an indefinite length of time regardless of the environments ambient heat.

[mjorgensen]

It is a section of the same woven sleeve Lou supplies with his header kits, looks like a common sleeve used in many situations. From the pictures JD sent me the main area is the wires as they go up and over the frame rail on the passenger side. This is where the header tubes get closest to any wires. We may double shield the whole section of wire from the loom termination to the plug.

Very Nice Mark I'll try the same on mine . Is that just a kool sock shieth?

[Coloviper]

EPA requires O2 in the collector. As far as anything else, you can take that journey with Lou. I will NEVER do that again. No sense repeating my feelings but I would not believe anything he says when it comes to how the computer works with his headers or sensor locations.

[ViperGeorge]

EPA requires O2 in the collector. As far as anything else, you can take that journey with Lou. I will NEVER do that again. No sense repeating my feelings but I would not believe anything he says when it comes to how the computer works with his headers or sensor locations.

Rick, none of the cars with high flow cats, headers, and Arrow PCM would be in compliance to EPA regs anyway. Technically you can't even change a cat unless you certify it no longer works or was missing when you bought the car. The problem with melting wires likely only shows up on track cars where the headers get really hot for a long time. Street cars could use the collector location but they still would not be "legal" once the cats are changed.

[Coloviper]

Correct on the cats George but if you added headers, kept the factory cats and O2 sensors (front in collector, and rear out back) the state will give an exemption hands down. Even if you failed the Dyno tailpipe emissions test. When I failed after multiple times in the 06' with the full Bellanger system, they would not give an exemption due to O2 not in collector. Don't get me started on the insane costs and rabbit trails Lou had me going to try to find a resolve all while he was calling me down and yelling at me at every call. Never again!

Interesting as of 01/01/2015, you can change the cat to a different manufacturer if you purchase a pre-approved cat from a list of manufacturers ONLY if the cat is no longer available or supplied by manufacturer itself. It has to be installed with manufacturer and part numbers facing down for visual inspection and verification. You would still have to have four cats though. I specifically asked this because of the fact the cats on a 96 like I have, are no longer available.