Tacoma Cat delete pipe "testpipe" Walk around rev

Here it is. Theres lost of talk about this so i made a quick vid

http://www.youtube.com/watch?v=3l3rViezXEU&feature=youtu.be

 

I'm sure you're going to get some haters giving their opinion. Once my cat goes bye bye I may gut it and used an O2 sim.

 

So i'm assuming the CEL stays on all the time on your truck now?

 

Not bad

 

Doesn't sound as raspy as I thought it would...Hows it perform on the a$$ dyno?

 

My o2 sensor are already bad and no the cel light isnt on. The tone is pretty deep just the video dosnt pick it up. Its a little raspy now that the packing has burnt out. But past 3k when the cams open it scremes

 

I have been wanting to do this since we did it on my dads chevy but how do you do it i was told on TW it would put your motor in safe mode?

 

I deleted my cat as well. (went bad, easier to replace pipe than to order/install new cats). Used the URD o2 sim to make the CEL go away (worked right away, 2min install).

But to answer your question: No, the engine doesn't go into safe mode. Nor does it affect the "back pressure" issue everyone seems to think, if anything the truck is less restrictive during acceleration. Phearson, do you agree?

Also, what kind of glasspack is that? I have the exact same setup just with the stock muffler. Looking for something with decent rumble under acceleration load, but no hwy drone and curious if a muffler or glasspack is the way to go.

 

yeah. Back pressure isn't a problem. Test pipes are common on lots of cars. And I think its a magnaflow glass. Not sure though. Just picked it up one day

 

I have to point out one thing before everyone thinks this won't throw a code like this guys truck.

It's a 96 which has a different ecu then 97-04. I am sure that's why no code is being thrown and it's operating a bit different. So for those of you 97-04. Plan on getting the o2 simulator to get rid of the code.



Also yes back pressure is very important on NA vehicles. I'm willing to be money you have a big loss of low end torque. Yes you did probably gain a bit in the hi rpms(higher then 3k). But we drive trucks..low end power is way more important I would think so not sure this is a great mod for those looking for performance. Unless you are planning on getting a sc..which OP of you are make sure to get a 97ecu to swap in.

There is my opinion with some facts sprinkled in.

Cheers

 

Very true. Not sure that was the case in the mid 90s though..

 

fair enough.

Didn't you yourself though do a dyno test where opening the exhaust up on our motors though merited a loss in power? because toyota had already tuned for the best efficiency on our motors?

Opening exhaust up too much without FAI is a bad thing..the only time its good to have a super open exhaust is if your running a turbo for the quickest spool possible..

 

I have friends who think its cool to unbolt and run it right out the cat on there 3rd gen 22res. Ive hit the rev limit in my truck countless times and run mine hard. Mine has 300k miles on her and she still gets up and goes. There Toyotas. Theres hardly and loss in power. Kust keep that rpm range up like there ment to be run

 

Modern day exhausts (specifically cats) are efficient enough to not have that much back pressure.. As already mentioned. Thus, cutting a cat really ISN'T a performance mod. When accelerating however, you are naturally going to have less resistance with no cats. Regardless of low or high rpm's. Not a loss of torque.

We can be at this all day. It's a Toyota.. Specifically a 3.4L. They're bullet proof. They're going to operate great regardless of the condition.