This is my story of the experience with the dave sport cat.

I have been running a turboxs exhaust for about 4 months with the midpipe. Getting tired of all the bitching my girlfriend does and the constant smell of exhaust (which I didnt really mind), and the unusability (wrd, sp?) of my defroster.

So a few weeks back I saw a mention of the dave sport cat by Teamrx8. I bought one and had it welded in to the midpipe. It was totally blown out in approximatly 3 days. I was running a 50 shot of NOS but that was it.

Thats just my experience and I thought you guys should know.....

 

Really? I was about to pull the trigger on this as well. What do you mean by blown out? Pics?

 

Can you post some pics of the cat installed into your mid-pipe? I want to be sure that the shop didn't damage it during install...

These Dave Sport all metal cats are used on rally cars running anti-lag.

 

It was welded in right between the o2 sensors. I dont really see how the shop could have damaged it?

I will definetly get some pics up but its on my car which is in the shop getting some engine work done right now. When you look in the cat there was a bunch of what looked like corrugated cardboard except metal. Now imagine 90% of it gone and the other 10% barely clinging to the sides all kinda smooshed up.

 

Don't ask this guy for pictures, OP won't deliver!

Just kidding!

 

Warranty?

 

I dont care to get a warranty on it. I might ask for my money back though. I am returning the car to stock. Just thought I would share my experience. I know pics speak a thousand words so I will really try to get some up. I'll be swinging by the dealership maybe on monday so I will be sure to snap a few.

BTW they voided my warranty on my motor because of the fact that the cat was blown. I didnt have a CEL though? Cost me $5000 to get a motor installed, so I am going to stock because I cant afford it again.

 

this is quite surprising as many people here have had great success with this cat.
I'm curious to see the pics

 

buy a vowel vana..

the cat you mention has been out of the loop way before you joined..

so troll off..

beers

 

You can burn out any cat including the ultra expensive cocktail shaker by running too much fuel into it and it lighting off, just like a high temperature blow torch. I suspect this may have occured with the nitrous setup

http://www.catalyticconverter.org/failure/index.htm

otherwise plenty of NA and FI enthusiast/racers have used this cat without issue. This is actually the first failure I know of. It could always be a manufacturing issue too. Nothing is perfect ....

 

They can't void a warranty due to aftermarket parts. More than likely they found the nitrous nozzle in the intake. Plenty of Mazda cats have melted too.

 

 

Cant void a warranty for aftermarket parts? Thats the only way they can void it! The nitrous kit was done with the BHR spacer and completly removed before service.

 

Look up this link: http://en.wikipedia.org/wiki/Magnuson-Moss_Warranty_Act and this: http://www.ftc.gov/bcp/edu/pubs/business/adv/bus01.shtm

Basically, it's a federal law that says they can't void your warranty for using aftermarket parts.

 

I dont get this statement? The cat is still in active discussion on the boards. I just did a quick search and found a few and all were in the current month.

I may be new to posting at the boards but I have been reading and cruising them for a while now. Which is what is instructed for newbs to do from what I gathered.

 

I understand the MM warranty act, but I also dont have the time or finances for a lwayer so that mazda will take me seriously. Its very easy to point at that and say "why dont you do this". In reality however they have already taken pics of the blown cat, and I have a demanding job that would not allow for court appearances.

 

Did you call MNAO to ask for a full explanation or just roll over and except that there isn't anything that can be done. Every time someone does that, it makes them think they can do it to the next guy.

 

Yeah I did. The tech stated that since the cat was blown out it reduced backpressure yadda yadda yadda. Which I know is bull$h!t but from the viewpoint of the courts I figured they could argue it very easily. If anyone has experience with the MM act I would be very interested. I will also search for this later when I get off work, like a good newb

I'm not trying to start trouble for davesport or badmouth a product. The lighting off of fuel sounds spot on for killing my cat, especially with the NO2. I just thought I would share my experience.

 

You should at least speak with Davesport and see what they have to say

But I've been through that situation with the dealership over a clutch and then a trans, the bottom line is you're better off not going there if you can help it because just like those cases and yours they love to screw your pooch for every last cent.

 

Alright so I finally got the camera form my girlfriend.......

First Pic is of the cat itself inside all blown out.


This is the silencer I put in all clogged to hell with the cat material......


This is how it was welded in. The cat itself is just a little larger than 3" so they welded in a spacer on each side then welded it to the exhaust. They had to do this because you cant stretch stainless.



I did talk to dave at davesport. He reiterated the fact that it was caused by the fuel lighting off the cat. We spoke about the fact that when he runs it on rally cars they move it to the back of the exhaust and they last much longer. I suppose you could do this with a street car but you would have to make a new bung and harness for O2 sensor and use a proper wire so the resistance is the same to the sensor.

 

I'm in the stainless fabrication business, stainless can be stretched

if raw fuel hits the cat it will light off regardless of location

 

So how can this be avoided without moving the cat further back?

 

So does this mean that this cat is not usable on our cars? My car in stock form shot some pretty nasty fireballs out the rear with the turboxs exhaust. From what I gather all rx8's do this, and it is caused by unlit fuel.

I guess a properly tuned engine would be different, but then you would have to get a Cobb.

 

BINGO

Stock flash with nitrous throws big flames I bet. You had a blowtorch in your pipe. LOL

 

Raw fuel isn't the same as a rich fuel ratio

that said, there's a reason one product might cost X and another might cost 7.5X