Im looking into getting a high-flow cat. any recomendatoins?

 

People seem to like the bonez cat from rx7.com

 

https://www.rx7club.com/showthread.p...&highlight=cat
+1 for Bonez, and Rotary Performance also sells them.

 

Rotory Performance and RX7.com are the same people.

 

+1 more for Bonez cat and dp.

 

I love my rx7store.net HFC 325$ wasn't bad either. Welds were very nice.

 

Thanks. I thought I'd read that before but wasn't sure.

 

There is at least one more Rotary Performance around (which is on the east coast somewhere) that is different from RX7.com. That's probably the one you were thinking of...

 

http://rx7.com/contact.html
This is the one I have bookmarked.

 

I have had my Bonez cat for about 3 years, love it.

 

I've got a Pettit version that I have not put on yet. Seems like a quality unit.

 

How much more power would a reonated midpide give over a good high-flow cat? I don't need to pass emissions in Florida, but I was just thinking about leaving the car close to stock and not getting excess fumes, backfiring, etc. If a midpipe is much better though, I'll reconsider!

 

A resonator doesn't help with those problems. A resonator just helps with muffling the sound a little more.

 

I have the Pettit. Good quality, it has the air inlet pipe if you still run the air pump, and I've never had a problem passing emissions tests in GA.

 

Thanks Mahjik...I'm aware that the resonator doesn't do much, my question was basically trying to figure out how much more power a midpipe can provide/allow over a high flow cat?

I currently have a midpipe in my garage from my previous FD and now that I have a totally stock FD, I'm questioning whether or not to put the midpipe or a high flow cat. If I can get a great deal more performance from the midpipe, I'll stick with it. If not, I may just buy a high flow cat & sell the midpipe.

Thanks,

Ian

 

Unfortunately it's just not that simple. You either:

a) don't want to deal with fumes and loudness
b) want more power

There's not really a middle ground. The closest middle ground would be a metallic substrate cat, but it's longevity on a rotary is in question.

As for the differences, there's never been a good test between the two; and the test results can be different depending on the type of cat used as well (so no one test would be conclusive for all hi-flo cats). There was a test done several years ago but the differences were such that it made it extremely hard to believe (and no test has really been done since).

 

Thanks Mahjik....If the fumes & loudness don't bother me, then I guess I'm probably better off using my midpipe & porting the wastgate.

Thanks again,

Ian

 

straight pipe FTW