^My thoughts exactly. People have been interchanging them in this thread and I was under the impression that PCD != HFPC...

 

The PCD's are made of 304 Stainless 2.25” tubing with 304 Stainless cast stainless flange sections and in essence free flowing with no obstruction. The HFPC's have the 304 Stainless cast stainless flange sections with 200 Cell metallic substrate Converters iside. Hence the HFPC's have a different (thicker/wider) size . The Converters have a warrenty through Magnaflow and Richie warrenties the castings and welds.

 

Thanks for clarification...so these are for people concerned with emissions?!?!? Rather than just deleting altogether?!

 

Yes... The HFPC's don't have O2 defoulers... They use the original O2 sensors

 

And for people who don't want rasp. I couldn't care less about emissions.

 

its called a $60 resonator

 

^

welded in a $59.99 resonator and it's night and day.

Morrissey, sounds great man. glad you got them installed!

 

Ok...so HFPC also reduce rasp?!?!

 

alright here it goes...

HFPC is for people that live in states where they sniff the exhaust gases for inspection, and people that dont want their exhaust smelling like gas from being catless. there is no rasp because there are still catalytic converters in the car. rasp comes from a car being catless. but that can be fixed with the addition of a resonator.

 

A $60 resonator, plus $75 labor if you can even find a competant TIG welder, a hacked up $1,000 exhaust, and a car that still stinks.


Hmmm....I think the extra $200 up front for the high flow cats is the smart choice.

 

Alright but there is still the fact about the power difference

 

Yeah, but the resonator you have to add to quell the rasp is going to negate the slight power advantage of the full deletes. In the end you're talking about a couple horsepower at best. I guess if you don't mind the smell then it's worth it to do the full deletes.

 

Well, I've decided...I'm stage III with dynomax as it is...with V3 jpipe...no smells to speak of, in a state where they don't care about emissions anymore and with gas prices lookin the way they do I find myself enjoying the deeper note of the exhaust at low RPM shifts and not punching it often. If I do punch it, I do notice a slight rasp when cold, but it's gone once warmed up. Car sounds like a beast IMO. I'm happy.

I think I'll stop where I'm at and not get into the PCD's OR HFPC's. I appreciate the input though.

 

Do u even know what a resonator is? How does it result in a loss of power. A resonator is a pipe with holes in it that is surrounded with packing.

 

He took on a "know it all" air...so I bowed out. I was just curious as to what the difference was.

I agree though...res is just a pass thru pipe with mesh to create slight turbulence to absorb resonance that comes off the motor and out the exhaust to sound fart canny. Maybe not explained the best, but I think that's what it does.

 

Yes, I do know what a resonator is and it's pretty common knowledge that they impede exhaust flow to some degree by decreasing exhaust velocity. Depending on the size of the resonator, it might be only 1-3 hp, but then again the full deletes are probably only making 3-4 more than the HFC's, so in the end it's really a wash.

Besides, let's show the op some respect and stop turning this into a high flow vs full cat delete thread.

 

yes, play nice gentlemen. ^^ But car sounds much deeper IMO. I have the Stock Pre Cats and the ATLP J-Pipe, Race Pipe, and also Base Catback and I think that the HFPC add a little bit of growl to it. I know he has stock after the J-pipe, but I would be interested to hear a sounds bite of the HFPC's with the ATLP combo. If anyone has that set up I would love to hear it.

Thanks guys.

 

Hows the drone while cruising with these?

 

Any DYNO for HFC with V3 j-pipe?

 

Probably wont see one for a while since it just came out

 

hows the smell right now?

 

I would go and DYNO my car for all of you... I just have no idea where to go and get that done

No smell whatsoever... I still love the HFPC's. Its great knowing that there is so much power there when I want it to be.

As for anybody curious about gas mileage, there is some improvement but nothing obvious. The car seems lighter still and it feels like it isn't working as hard while I'm cruising around.

As for the PCD vs. HFPC argument, my opinion is that the pcd's will give your car more "balls" but with that comes the rasp and the smell. If that trade off is okay with you and you don't have a problem getting around emissions, then by all means, get them

As for me, that trade off wasn't worth it. I wanted my car to breathe better and get some more power while being able to maintain the "class" that I associate with the TL... For me, the HFPC's accomplish this. Either way, PCD or HFPC's are a win!!!

 

anyknow what the cell count is on the base and type-S primary cats?

im going to get the HFPC but i would like to know for reference.

 

good to hear that you have no smell from the pcds

now i really am thinking about ordering them

 

I don't know what the stock count is for the base or type-s. I would be interested to know as well...


I don't have the PCD's...

I have the HFPC's. If you don't want smell or rasp then make sure you get the HFPC's

 

Found it:

HIGH-FLOW EXHAUST SYSTEM WITH CLOSE-COUPLED CATALYZERS

To reduce weight and move the engine's two primary catalytic converters as close as possible to the combustion chambers, the TL and TL Type-S exhaust manifolds are cast directly into the cylinder heads. A 900-cell per-square-inch (600-cell per-square-inch in TL Type-S) high efficiency catalytic converter mounts directly to the exhaust port of each cylinder head for extremely rapid converter light off after the engine starts. This unique mounting system has the added benefit of eliminating traditional exhaust header pipes for a significant weight savings.

To ensure optimum flow and reduce backpressure, a hydroformed 2-into-1 collector pipe carries spent exhaust gases down to a 350 cell per-square-inch secondary catalytic converter located under the passenger cabin.

After the catalytic converter, the TL Type-S exhaust flows through two underfloor mufflers and dual rear silencers to reduce backpressure.

The TL Type-S features a high-flow exhaust system with 14-percent better flow than the TL, with larger pipes through much of its length. Tuned for an aggressive sound befitting the high-performance image of the TL Type-S, the system also features exhaust tip with large quad outlets (two on each side).

 

How long does it take to install the hfpc?

 

^depends on your skill level....
I know morrissey tried once, and couldnt get a bolt, or stripped a bolt and had to take it to a shop.

I started around 11am and got done at 7pm on Saturday 5/14/11.
the easy part was clearing the engine bay of the fan/strut bar/anything else that impedes easy removal of the cats.

the hard part was taking the cats off, as it has large heat shields that you have to wiggle out with not much room to work with.

I did mine on jack stands, no lift required.

 

Any guesses on how long install would be with a lift and a "professional mechanic" ?

 

^^ with a lift and no issues to run into like rusted bolts, then it should take no longer than couple of hours (2-3hrs) give or take!

I did mine on a lift, but living in the northeast all my exhaust bolts were seized causing me to sit patient and heat up the bolts and remove them and had like 2 bolts where I had to actually cut the bolts out with a cutter or sawzall!!

 

The guy who did mine took about 4.5-5 hours. Granted, it was his first time working on the TL-S and if he did the install again, it wouldn't take nearly as long... Either way, the nice guy discount was great and I didn't have to bitch and moan while I installed myself.

My advise is, if you aren't at least 90% confident in your ability to do this mod on your own or with someone who is competent to do it with you, then take it to a professional.

 

went from v1 pcd to v3 pcd in 45 minutes.

first time took 2 hours

 

A gains graph would be nice, interested to see how much difference a 200 cell cat makes vs no cat.

 

Not enough to make any real difference. Maybe 2-3 whp, if that. You can drop 30lbs from the car to make up that marginal difference.

Here's a good article where a Civic gained 3 whp over baseline with a ceramic cat, 4 whp with a metallic cat, and then another whopping 1 whp with a straight pipe. This testing is right in line with the theory that a good high flow metallic cat will make ~ 80% of the power of a straight pipe.


http://www.importtuner.com/features/...val/index.html

 

anx, I would like to hear your review on teh HFC. you did install it righhhhT?

 

Yep, I like them a lot. I need to get some vids up; sounds great!

 

I really cannot wait to order my Jpipe, I am iffy on the HFPC's only because I am in So-Cal and passing emissions might be an issue, but I guess I could always just swap em back when it comes time to get a smog test eh


I really wish this was not "NORMAL" My truck sounds better then my TL at idle lol and by better I mean "quieter." Is there anything we can do to correct that?

 

Mods, could you please update the thread title to UPDATED 05/26: True Dual Exhaust, RV-6 HFPC, and V-3 J-pipe install with , pics and video. (or something like that)

Here are the newest videos with the RV-6 True Dual Exhaust. I only have 2 videos for now so that you could hear the exhaust note. My "videographer" is on her way over now to get some more film.

http://www.youtube.com/watch?v=1UfnXKRm8iA

http://www.youtube.com/watch?v=zsv9QCatxWM

 

Here are two more videos. The first on is an "In-Cabin" clip. Most of loudness of the exhaust is heard between 0 - 50 mph. After I hit the 50 mph mark the car seems to quiet down... but until then it is pretty loud. The "in cabin" clip will give you a little taste of what I am talking about.

http://www.youtube.com/watch?v=jrbod7u6vSM

The next video is for those who would like to hear a drive by or two. I tried to vary my driving each time... from aggressive driving to a normal cruise to a WOT 0 - 75 mph. Let me know what you think.

http://www.youtube.com/watch?v=jrbod7u6vSM

Let me know what you think. All C & C's are welcome. As for me, it is a little bit to loud for me. I guess that it will take some getting use to.

 

i should be getting mine on June 1st cause im in Cali.. I have a 6 speed manual so i will post some clips when i have it installed. I dont have the HFC though