Ok....does anyone have a f-150...straight six engine...with both cats cut off?
If so...does anybody have a flowmaster 40 series on it?..wut about a glasspack?
If anybody does please tell me how it sounds

 

yeah i have a friend i cut the cats out and stuck a flowmaster fourty series cat back muffler on. In my opinion it sounded almost like a 302. Its worth the effort itll get the motor breathing better either way.

 

...Welcome Fordrunner1976, to Ford Truck Enthusiasts!

…..See you on the boards.

 

Yes. Did it make more power? no.



www.exhaustsoundclips.com has a couple flowmaster equipped inline 6's for you to listen too.

 

I want to replace both my factory cats with a new one, since they are probobly clogged with a bunch of crap. I'll let a exhaust shop do that, (I hate doing exhaust work, get too much crap in my eyes ) as well as replace my flex-pipe, Im never using that crap again, after a few weeks it was rusted out.

 

It sounds good but not if the muffler shop ***** it up, and you get an annoying ticking noise and vibration. Make sure they dont benf the egr tube too much of changing the y pipe further upstream that the extra backpressure goes up your egr tube, and if its cracked it really makes one hell of a noise. My truck got molested that way and I regret spending the $850 on that. Just punch the thing out and get a simulator for your oxygen sensor so you dont get a check engine light and keep it from closed loop mode, then yor money will be in the gastank.

 

I have a 1993 F150 I6 and I cutoff both of the catalytic converts and the muffler that was on it. Now I have nothing and it's coming off of the two pipes right under the passenger seat. I'm going to run duals out of there, right off those two pipes.

Anyone know how that would sound w/no mufflers?

 

no mufflers on a 300 = awsome...like a tractor on steroids...get a cat on that truck boy!

 

yeah the police liason officer from the highschool tapped me on my shoulder the other day and asked me if i had a muffler or anything on the truck, i'm like um no. he just smiled

 

I wanted to take the cat out of my truck, but in the 96, there are 2 O2 sensors, one infront of the cat, and one behind, so I had to go the route of a hi-flow cat instead. Put on 3" and a flowmaster 50 delta and it sounds pretty good.

 

Maybe some one can answer this for me i have a 94, and the exhuast is about shot from the rear of the muffler back. I have debated about cutting/ gutting the cats. Sound is not what i am after, but in taking/ gutting them will my check light stay on? also if i went with a hight flow would this cause the check light? I have a frend to put a high flow on a neon and the light stays on. emissions i am not worred about. also I hate to runine two good cats because i could move and then have to worry about emsissions. so if i find a junk yard set and hollow what will this do to my light? what will a high flow cat do? my light and air/ gas mix is what I am concerned about. thanks

 

Yes, I think your check engine light would come on, and your fuel ratio would also change. There is some good explanations on that in the thread "smog items" posted back in september, in this forum. I hear you can get a simulator for the second sensor, that being the pcm picks up signals from that oxygen sensor and componsates the right air fuel ratio to produce the ideal fuel air ratio. Without it i think it runs in default mode, but the system still needs that to produce the right fuel mixture. I think you can "beat the computer" by adjusting your timing, to get good power and better effeciency.If you put in a egr restictor plate in you can richen the mixture that way also.

 

If its a non california vehicle aka speed density, then no the check engine light will not come on if you remove the cat(s), the O2 sensor is before the catalytic converter(s).

 

Thanks also will it affect my fuel air ratio? or will it still read right with out the cats?

 

If its speed density, removal of the cat(s), should have no negative effects on the air/fuel ratio.

With that said, there is little to gain by removing a catalytic converter thats in good condition.