TeamRX8

iTrader: (25)

if you had remembered correctly you would know to get your facts straight first

100 cpi means nothing in and of itself other than there are 100 holes every square inch, not their size, flow potential, total area, etc.

the Magnaflow is not a generic cat, it is a certified 49 state legal cat pipe replacement, and be advised that there is potential for STX to be revised in 2011 to meet this requirement which leaves you with this option or OE only that I'm aware of

http://www.magnaflow.com/02catalytic...irectfit=49150

Otherwise I simply stated that the HKS cat is a proven option. I not recommending it and could care less about anyone elses no-experience-using-it opinion or financial capability ...

bsteimel

iTrader: (5)

I was looking for equal or better performance, a better value then the OEM, and no CELs. We all know that performance exhaust systems for the rx8 don't really add up to much. Especially on NA systems

So the HKS doesn't work for me because of the value. The magnaflow doesn't look like it works at all. The RP supercat looks like it has terrible value because it only lasts about 10k. That only leaves the davesport with the rx7store, bhr midpipe, or weld it into the existing exhaust.
I'm leaning toward the bhr because it seems it is of better quality. The resonator sounds like its worth the money too. If it lasts more then 20k it would be a better value then going with the OEM which costs $1100 plus labor to weld it on. I could get the bolt on midpipe plus an extra davesport cat for equal or less then the cost of OEM!

I hope my reasoning is somewhat sound. Thanks for the help and information.

Edit: apparently the rx7store comes with the magnaflow cat not the davesport. I also have an email out to SRmotorsport to see who manufacters there hi flow cat. I did not know that SR was another option

Second edit: SRmotorsports uses the magnaflow catalytic converter.

IronTanuki

I had the Magnaflow cat (which afaik is what comes on the rx7store pipe w/ cat) which died for me pretty much immediately (< 200 miles) after going turbo. It lasted a total of maybe 1500-2000 miles. At the end of its life it was giving me approximately a 60-70g/s flow reduction on my peak airflow numbers vs a test pipe as well as reducing my manifold pressures by about 3psi from 5000RPM+. I posted pictures of it after dying in my build thread here.

It did not give me a CEL while NA on the stock tune.

bsteimel

iTrader: (5)

After doing my research I decided to add a little back to the community. Here is a thread that has a compiled list of all cats and cat included midpipes

https://www.rx8club.com/showthread.p...25#post3847125

Mr. Pockets

I still have the Davesport cat, but I usually take it out for the winter. First, my midpipe (with no resonator) is loud. Second, the cat doesn't work well on the car in the winter. During the warmer months I have no problem with codes. When it's colder I get a cat efficiency code some times.

If you live in a warm climate, the Davesport cat could probably work for you just fine year-round. But if it gets into the 30s, you're going to see a CE light some times.

I don't know how many miles I have on mine, but after two summers it's not a huge number. I don't drive a whole lot. My commute almost doesn't register on the odometer. At most I have about 5k on the thing. If it stopped working, I'd get another.

Mark, I hadn't heard about that proposed rule change. Interesting. I don't think I'll be in STX much longer, though.

TopGear8

iTrader: (3)

^Different car or going to a different class with it?

Mr. Pockets

You caught that quickly.

I think I'm going to be driving a different car this season. I won't muck up this thread any further with the story.

Suffice it to say the decision isn't because of the Davesport cat, which I am very happy with.

TeamRX8

iTrader: (25)

There's no proposed change other than the discussion about an ST re-org and the usual closed-minded complainers who think the ST rules should be identical throughout theentire cAtegory the same as all the other categories. Except they're not the same in all categories; Prepared and Modified. Just the same the bitchers and moaners seem to be getting all the consideration lately IMO. I don't see them opening up the rules in all the ST classes given a number of the latest rulings for that category. I doubt they will open up the cat rules for the lesser allowance classes. If anything they'll do another takeback or leave it alone. Another takeback wouldn't surprise me at all. That's why 2011 will likely be my last year in ST.

Jedi54

iTrader: (7)

which midpipe are you running? Also, what catback?

TeamRX8

iTrader: (25)

If it is EPA certified they are required to warranty it for many years/miles. It was never rated for turbo use. A cat converrter can be burnt up for many reasons. That doesn't mean there is anything wrong with the cat. The Davesport cat has been burnt up plenty on turbo apps. My personal recommentation for tirbo is the HJS cat. It has both the flow capacity and heat resistance a turbi requires. You can still burn it up with a bad tune too. That's just the reality of using a cat converter.

Mr. Pockets

I'm pretty sure the midpipe is form RX7Store. I have a Greddy SP2 catback. So far, I've been able to stay just under the sound limits at national autocross events.

Lvis

will this cat possibly pass inspection ( newyork)

paimon.soror

iTrader: (15)

yes.

As a side note, anyone know why BHR stopped using it?

alnielsen

iTrader: (4)

They were having problems with it burning out quickly. How quickly it does burn out likely depends on how (lean) your car is tuned.

TeamRX8

iTrader: (25)

rich with an air leak = blow torch

some people have run them successfully, but in general you get what you pay for. It's a single rolled winding design and is susceptible to telescoping out the back end