Headers/Cat Delete/Tune

[MarauderPU]

Since my Marauder now has a 63 Truck body sitting on it and is registered as a 1963, I do not need to run cats and am exempt from California smog laws. I bought a set of BBK long tubes for Mach 1 and want to build my own exhaust system. I have built exhaust sytems before and plan to use an X pipe and Magnaflow mufflers.

Question. Location of the O2 sensors. There are bungs in the collectors of the headers which I expect will work just fine with the pre-cat oxygen sensors. What about the other pair located after the cats? Do I need to install bungs downstream a little?

Question. I have a Diablo Predator. Will I need to install a new tune for the headers? What is the second set of sensors (after the first set of cats) for?

thanks
Karl

[Paul T. Casey]

The second set monitors cat efficiency. They can be turned off in the tune. Since you don't need them, shut them down. You can either get eliminators, or run the original O2's in the bungs.

[CBT]

How is it progressing? Pics?

[justbob]

The second set monitors cat efficiency. They can be turned off in the tune. Since you don't need them, shut them down. You can either get eliminators, or run the original O2's in the bungs.

You could also do the Gott's mod where you stack spark plug foulers in before the sensors (google it). This will simulate good Cat efficientcy even if you have NO cats like me.

You can install the rear o2's any where after the cats. Mine are about 10"s after the crossmember so I could have room after the LT's for the electric cutouts.

NEED MORE PICS!

[MarauderPU]

I have been driving the Marauder Truck for a month or so an sorting out rattles. It is a blast to drive and nobody can figure out what it is when I start it or open the hood.

The interior is a work in process

It tracks nice and handles great. It weighs about 3750 lbs

Can't wait to get the headers, new exhaust and eventually the Cobra blower set up installed.

[justbob]

I ENVY you! Looks badazz man, simply perfect.

[MarauderPU]

What if I do not install a second set of bungs and unplug the cat sensors? Will I just get an engine light trouble code



The second set monitors cat efficiency. They can be turned off in the tune. Since you don't need them, shut them down. You can either get eliminators, or run the original O2's in the bungs.

[MarauderPU]

A few more pics


I ENVY you! Looks badazz man, simply perfect.

[justbob]

What if I do not install a second set of bungs and unplug the cat sensors? Will I just get an engine light trouble code

Yes you will. It would need to be turned off in the tune.

[ImpalaSlayer]

Yes you will. It would need to be turned off in the tune.

or if you dont want to tune it just buy a set of MIL eliminators

[MarauderPU]

What does the ML eliminator do again? does it screw into the bung?


or if you dont want to tune it just buy a set of MIL eliminators

[ImpalaSlayer]

What does the ML eliminator do again? does it screw into the bung?

iam assuming it is a resister or something of the like that physically tricks the computer to thinking the rear o2s are working like they should. its just plug and play, one end goes into the sensor wire and ther other goes into the harness on the car. i just got a set for my bronco from UPR, they were the cheapest i found. my problem was i put a catted bassani y pipe on the truck and the cat was so small the down stream o2 didnt see a great enough difference (basically thought there was no cat) so it would throw a p0420 code. i put the eliminator in and the code hasnt came back since :beer:

[martyo]

Underhood pics or you will be banned!

[MarauderPU]

The eng compartment will be cleaned up more when I install the blower with new valve covers

[ImpalaSlayer]

man that thing looks right at home in there

[Mercguy04]

This is a little off topic.
The space just forward of the cab on the hood (drivers side, all I can see) perhaps a
Marauder flag would fill that spot. A badge or painted in would look good.
Since the "Marauder PU looks like a Ford. JMHO. No criticism intended.
Good luck with your project

[massacre]

You did an awesome job with this project, very impressed!

[Merrill]

Short bed unibody Ford, don't get much better when it comes to old trucks. Well done.

[dohc324ci]

This truck is in need of an Eaton swap! Looks sweet!

[CBT]

Dang thing looks great! :beer:

[burt ragio]

Looks like it has been a great project in the works. What is the suspension set up ?

[Fosters]

What does the ML eliminator do again? does it screw into the bung?

Yep. Cost about 10 bucks to make, but it's more of a pain to make them then to turn them off in the tune. Mine are turned off on the mustang and the harness zip tied to the tranny so it doesn't melt on the headers.:D

[guspech750]

Oh yes. Finally an update. Truck looks awesome!!


Sent from my iPhone
Eaton Swap + 4.10's = Wreeeeeeeeeedom!!

[68MercuryM250]

MarauderPU, send me a PM where we can discuss this project please!! thanks!

Stu

[justbob]

For anyone not in the know he dropped this body onto a complete rolling MM frame! Damn good fit...


Self proclaimed Builder Of Badassery.

[Jeffonebuck]

This is a little off topic.
The space just forward of the cab on the hood (drivers side, all I can see) perhaps a
Marauder flag would fill that spot. A badge or painted in would look good.
Since the "Marauder PU looks like a Ford. JMHO. No criticism intended.
Good luck with your project

I think a panther with a large pair hanging would fill that spot nicely ! Giddy up

[1stMerc]

Sweet setup. Plan well executed.

[lji372]

Saweeeet!!! Looks great :D
Awesome work

[Jeffonebuck]

Short bed unibody Ford, don't get much better when it comes to old trucks. Well done.

This is the third unibody that I have ever seen!! Did you repurpose the behind the seat gas tank ?