Yes ofcourse I have read this thread. Why, what was wrong with what I posted? I am just posting on the HJS cats that teamrx8 was referring to, that they are also used in a cool twin turbo application.

anything else?

 

so you are bumping stuff not available in the usa or are you going to provide it?

and the cost is the issue.. 200 > 100. not in a good way.

bees

 

1. sorry to post something off topic and bump this thread.
2. If it is still made, anyone can get it even if its in another country.
3. cost is not an issue to some people.

When you say provide, do you mean HJS cats or Davesport cats?

Can't we all just get along?

 

How does this sound and now that BHR is offering it on there midpipe it must be interesting.

 

Sorry to raise the dead here but what options did everyone go with to mount this up?

That BHR offering looks pretty tempting (with a resonator even) http://blackhaloracing.com/products-...nated-midpipe/

But I wanted to see what else everyone chose?

Thanks for the input.

 

For 450 Bucks I could make 3 of them...Just get some piping, a 40$ Vibrant performance resonator. and the Davesport CAT...It won't look as pretty, but it will do the exact same thing...

 

Yes and no. The BHR resonator is not the vibrant unit they started with. The vibrant was failing so BHR found a different company who is making a custom resonator.

 

Which will only effect sound...Not performance...

 

and the fact that the Vibrant resonator can't handle the EGT's and will literally start tearing itself apart into your mufflers.
aside from that little detail...

 

The cat is not included for $450. The cat is bumping the price $175 (a little step considering you can buy one from davesport for about $100). Add $100 for polishing and another $25 for a second o2 bung. Tops out at $750 which is a little pricy. Great quality, service and warrenty but still $750. I have the Turboxs exhaust kit and I had my local exhaust ship wield in the davesport cat. Total cost for exhaust, cat and wielding was about $700.

 

Only an idiot would waste $100 to polish a rotary mid/cat pipe.

 

I took my midpipe off around the end of summer and my Vibrant resonator was still intact and not "tearing itself apart".

I guess YMMV on this one...

 

Your better off having a shop weld the cat to existing system and removing the CAT back

 

Allow me to explain;

1) We tried the same Vibrant resonator that everyone else uses for their cheap midpipes. Raspy sound and poor longevity because the interior packing burns away (they were not designed for use with rotary engines). The detrimental effects when this happens have been provided by our good friend, TeamRX8 with a link. Perhaps he will be so kind as to repost it here for everyone to learn about exhaust flow and what happens when devices designed to use packing no longer have the packing to attenuate certain frequency groupings......

2) We then tried the Moroso 94055 Race muffler. Although it has no interior packing, it also failed because Moroso took a patented design, reverse-engineered it, and used thinner gauge steel with shitty welds. The Renesis tore those things apart in 30 days of use.

3) We were then directed by a friend to the guy who holds the patent for the muffler/resonator and the rest of the story is posted on our website.

As for the DaveSport cats costing "only $100"; that is not what they are priced at on Dave's website. I buy them 6-8 at a time for more than that and at a discount that hardly makes offering them on our midpipes worth the hassle for me.

 

It's cheap, but you get what you pay for. 100 CPI is only part of the equation. The OD is considerably smaller than the OE cat. So it gains some flow area with 100 cpi but also gives some up with a lower total cross sectional area. I've never seen any temp data on it, but I suspect it can't take the heat long term.

The stainless mesh packing in my Coast Fab mufflers will never wear out. Ever.

 

I apologize I was incorrect on the price of the davesport cat. I think I paid about $120 plus shipping maybe $135 but that was over a year ago. Website price is about $138 (plus shipping) now.

FTR I think charging $175 for the cat is fair. You do need to make a profit to cover the extra work required for the install and for the buyer it would cost more to have it welded in. Win win for everyone.

 

At $175, BHR makes nothing after all is said and done because the DaveSport cat (although listed as a 3" inlet/outlet) actually turns out to be a bit bigger than that and a little pipe-strecthing becomes necessary. Another "value-add" on the midpipe. I am just glad offering the cat does not have to go the same way the fuel pump removal loaner tools did.

The reason I wanted the actual cost of the cat to be clarified is because people will always contact me bitching about the price we charge for stuff, and their complaints are often based on erroneous information. Then, we retailers get accused of charging too much.

 

Given that my front O2 sensor has been faulty for a few months and subjecting my own DaveSport cat to random max-rich situations, I am pretty sure when I next check the condition of the cat it will be all we need to say about whether or not the DaveSport works well on the Renesis. Especially since I have it mounted in the front half of the midpipe just before the first bend. I just re-installed my factory flash the other day and the 420 CEL still does not illuminate. N/A applications I think will be fine, and maybe street F/I'd applications, but heavily tracked/seriously boosted engines we haven't gathered any info/data about yet.

Of course, serious trackers can always use the HJS cat.

 

Ooooooooh-yeaaaaaah

 

I am always flattered by your obsession, Team.

 

ahh...

 

As I, yours

 

It seems that this is the only option to replacing the OEM cat. The RP super cats are dying within 10k.
What kind of longevity are you seeing with these cat's? Also it seems some people are getting P0420 codes is this true or is that because of other problems?

I was thinking of getting the BHR midpipe with the davesport cat to replace my bad OEM cat. At least with this setup the cat is cheap and can be cut out and replaced when it goes bad. $625 with the option to replace the cat for $138 plus welding seems better then spending $1100 for the OEM that seems to die on me every 40k. Unless it just comes out to a wash with lower longevity.

edit i also just found the rx7store replacement that apparently uses the davesport, only $345. apprently swoope has had this one on his car since 2006 with no problems. That might be my answer.

 

it's not the only option, there is the Magnaflow option (new and unknown) or the HKS racing cat option ($$$ but proven and ultimate flow potential)

 

If I remember correctly, the Magnaflow isn't a 100cpi cat and it can't handle the temps of the rotary. Your HKS may be a might fine and long lasting cat, but the price is just too high for most to justify.