Does the 06 benifit from aftermarket cat back?

[Acurasrule]

I have ordered the Injen CAI and will be putting it on this week. (I had an 03 rsx type s before my 06 tsx, and had and Injen CAI on it and it was great).

Anyway, have been debating between the comptech, tanabe mt, and the greddy evo 2. However, I got to thinking, I know the 06 got several modifications from the previous models. From honda corp:

Exhaust flow is critical to performance and figures heavily in the strong power characteristics of the TSX. Like its intake system, the TSX's stainless steel, high-flow exhaust system has been enhanced in 2006 to help provide an increase in horsepower. Targeted changes reduce backpressure and increase exhaust flow from 115 liters per second to 125 liters per second. Enhancements to the exhaust system include:

* Cell density of front catalyzer reduced from 900 to 400 cells
* Exhaust pipe diameter increased from 54mm to 57.2mm
* Diameter of rear exhaust pipes (leading to finishers) increased from 42.7mm to 45mm
* Muffler capacity increased from 52.1mm to 57.5mm

Being that the 06/07 tsx had had the exhaust system increased/bettered, is there any benifit at all to adding on an aftermarket catback? Or would it be purely for looks?

Also, is it possible that any of these aftermarket cat back systems, could actually DECREASE HP/Tq???


Just wondering if it is worth the money to install a cat back, when it looks like acura has made some nice increases on the stock setup?


Anybody who has any thoughts/facts anything please feel free to post!


Thanks!

[FuZzYknUckLeS]

Interesting questions. Sorry i don't have yer answer though.
Could ya post your source for the info?
What also got my interest there is where it says: "...Like its intake system, the TSX's stainless steel, high-flow exhaust system has been enhanced in 2006 to help provide an increase in horsepower...."
Any idea what changes they made to the intake system?

[Acurasrule]

Sure, I got that info from hondanews.com


Here is what it says' for intake:

"Tuned Intake

The TSX uses a single-stage intake manifold that for 2006 has been retuned to increase intake air flow from 95 liters per second to 110 liters per second and help add an additional five horsepower to the TSX's already powerful engine. Enhancements to the intake system for 2006 include:

* Intake radius increased from 70mm to 80mm
* Intake manifold bore enlarged from 60mm to 64mm
* Throttle body diameter increased from 60mm to 64mm

Fixed-length intake runners are tuned in length, size and shape to provide an optimal blend of low-rpm torque and high-rpm response, while supporting the advanced i-VTEC valve control system."

[chuson]

hm... what Acurasrule posted is true. I've also read that somewhere before. The 04/05 has 200HP while the 06 has 205HP SAE Standard. Therefore, I was wondering if changing mine to the 06 Intake Manifold/Throttle body will help. I already has other mod (see below), so I might take some advantage w/ a bigger IM and TB. Not sure if the 06 exhaust will help.

[EX ITR]

The upgrade on 06 is good for every day driving, balanced for low end torque and still give high end power. I'd read from this forum before that the aftermarket exhausts only give 1 or 2 whp. Also it depends on the size of the pipe. Some are made to prduce high end power and you get very little in low and mid range, so yes you'll feel there is less hp/ torque. As for me, I have always changed exhaust on every car I'd owned cause it sounds good and fast!(maybe not all of them)

[Tsx536]

If the exhaust was already optimized by Honda this last year, I'm guessing you will see minimal gains. Even in 04/05 an exhaust gave only 1 or 2 whp. An exhaust is mostly going to be for looks and sound in your situation.

[Cypher]

Hi,

Im quite sure there will be gains, but minimal. Like what others have said, its purpose would be more favoured towards looks as opposed to performance.

Please correct me if im wrong, but if you want to maximize gains from an aftermarket exhaust, you would have to ditch the dual muffler setup and go with a straight through single muffler system.

Cheers!

[Tsx536]

^^ Yep, and you could also remove the resonators and the cat before the exahust.

[Zeeshan]

ok first off.....there is no factory exhaust in any car that will be as good as a nice aftermarket. you will get SOME gains.

however o the 06, I would say when paired with headers is when you'll get optimum power out of your aftermerket exhaust. I would say it would be worth the money on the exhaust only if you also go with headers and cai.

even though the intake is improved for 06....look at the design....its no cold air. the cai will still give you great results. its improved to suck in more air...while the injen cai is designed to suck in more air and COOLER air.

[wylin]

Originally Posted by Zeeshan

ok first off.....there is no factory exhaust in any car that will be as good as a nice aftermarket. you will get SOME gains.

however o the 06, I would say when paired with headers is when you'll get optimum power out of your aftermerket exhaust. I would say it would be worth the money on the exhaust only if you also go with headers and cai.

even though the intake is improved for 06....look at the design....its no cold air. the cai will still give you great results. its improved to suck in more air...while the injen cai is designed to suck in more air and COOLER air.

thats incorrect, about exhaust (and aftermarket parts since not everyone dyno tests) a poorly designed aftermarket exhaust or part can decrease power in parts or all of the rev range. In our phase2 project Z we seen a loss of 5whp from an intake manifold spacer and on Z33/ S2000's dyno sheets i've seen loss of lowend-midend torque and hp from certain makers exhaust.

A good example is a friends company's imported jdm brand exhaust it makes 0 hp and 1-2ft/lb torque for a wonderous 1600$ msrp when paired w/ an intake on a AP2 S2000.

[StevenRFrancis]

Originally Posted by chuson

I've also read that somewhere before. The 04/05 has 200HP while the 06 has 205HP SAE Standard. Therefore, I was wondering if changing mine to the 06 Intake Manifold/Throttle body will help. I already has other mod (see below), so I might take some advantage w/ a bigger IM and TB. Not sure if the 06 exhaust will help.

I also read somewhere the the SAE standards changed this year and that the ACTUAL HP gain for the '06 from previous is 13 HP. Not absolutley sure though.

[Cyde]

Originally Posted by StevenRFrancis

I also read somewhere the the SAE standards changed this year and that the ACTUAL HP gain for the '06 from previous is 13 HP. Not absolutley sure though.

your correct, it's like 13 to 15 more hp , according to the dynos and research done at Hondata. the 06 tsx is 205 sae versus the previous 04/05 tsx was 200 crank

[psykotik maniak]

check the hondata website... they have a small section where they mention the increase intake tubing and exhaust flow