Contour Enthusiasts Group Archives Forums Modifications Duratec Performance have you gutted your precats today?

http://www.mustangworld.com/ourpics/fcar/news.htm

search for MIL eliminators.

That link seems like it is down. Sorry
http://www.mileliminators.com sells them.
http://shop.store.yahoo.com/mustangweekly/lmr-44.html

These work without cuting and soldering.

I have the sheets in the garage.

It is simple. A resistor and a capacitor.

Radio Shack part numbers
2721434 1 mfd Capacitor qty 2
2711356 1 megaohm resistor qty 5

One resistor inline of the grey wire.
One capacitor parallel across the black and grey wires.

Solder and heat shrink. I uses blue heat shrink to match the factory loom.

I could email you the instructions and wiring diagram.

I did it... in fact... one COULD say that i or umm... my friend in fact did it to Puck's car... he wrote the howto... but.. umm... my friend actually did it :-) First on Neco im thinking too.... Ill credit the gentlemen here for the idea though.

Indytour
PM'ed ypu

November 2001 Sport Compact Car:
"To Cat or Not to Cat
Whatever you do, do not remove or gut out the catalytic converter on your street machine. The monolithic, straight-through design of modern three-way catalytic converters is usually quite free flowing on most modern imports, producing at the most, only a pound or two of extra backpressure. A gutted cat can actually hurt power as the empty box can cause flow stagnation, which effectively shortens the length of the moving gas column in the exhaust pipe. The empty box can also reduce important flow velocity, This can be felt as loss in bottom-end power.
Because of these factors, it is not unusual for cars to actually GAIN power with the addition of a cat. If every last bit of power must be extracted, as in real, off-the-street sanctioned racing, then the cat can be removed and replaced with a length of pipe the same diameter of the rest of the exhaust system, not simply gutted to a power robbing shell. A full race turbo or nitrous oxide system can benefit from removing the cat when racing levels of boost or nitrous are being run. Boost or nitrous flow levels you woiuld run on the street on pump gas are not enough to warrant cat removal for performance gains.
If you need to change your factory cat for a larger, higher flowing one, Random Technology and Magnaflow make replacement cats with 3" or even larger inlets and outlets."

DONT GUT THE CAT!!!!
The only person on here that has so far said they dyno'd their car after gutting the cat did so with other mods. The key to exhaust is scavenging. If you make an exhaust system with a gutted cat you are slowing the flow down. ROBBING power. Get a free-er flowing cat. dont gut it.

I think that I read something from Terry Haines earlier this year that the small expansive chamber in the gutted manifold might actually help the exhaust scavenging.
These cats are a lot smaller than the main inline cat further down the exhaust, also it is so close to the exhaust valve exit that the gas could still be expanding rather than cooling and contracting. By the time the gas hits the main cat, it is a lot cooler.
Perhaps that has something to do with it.
I am just speculating as I don't have any experience in this area.
Try to get Mr. Haines to venture his opinion on it again.

warmonger

That SCC article is refering to the main inline cat. Which has been stated numerous times on this site that it is a bad idea to gut the main cat. (for once this rag got something right! )

We are talking pre-cats here. Completely different.

Gutting the clamshell style precat manifolds has garnered proven gains.

Cut & gut the main cat BUT put a large bore TUBE in it.........