Ok so my current exhaust system is as follows:

*Mid muffler delete
*Resonator delete
*Dynomax resonator
*3rd Cat busted out the insides
*Stock Type-S mufflers and cats

Sounds great as it is and I felt a slight increase in the butt dyno after the mid muffler and resonator work was done, overall I love the sound. I also really prefer to keep the stock look and love the look of the Type-S mufflers.

As a mechanic I do understand that an engine needs back pressure to operate efficiently. My question is just how much back pressure do you guys think is produced by the type-S mufflers?

I want to most likely keep my engine N/A and I have a plethora of planned upgrades right now, I really want to break 300 whp N/A. Options as I see it for exhaust:

Option 1.
*Stock mufflers stay
*J-pipe
*Pro-cats

Option 2.
*Quad exhaust ATLP
*J-pipe
*Pro cats

What do you guys think?

 

Option 2 is similar to my setup, I guess don't make a decision till I get a post jpipe dyno

I dyno'd 269hp 220lbs tq

I will see if I can get another dyno done soon to see if the jpipe proved gains with the proicats

 

whether or not you do procats you need to get an exhaust, not a chopped up stock exhaust.

get ATLP jpipe/test pipe/exhuast

 

if yuo get the ATLP i take the stock off your hand that will help you with that hefty 1050....

 

I don't think you can get procats anymore. I'd go with the j pipe,test pipe,pre cat deletes and ATLP exhaust. I think that would bring you close to your goal of 300 WHP N/A.

 

Well I am not sure that I need an exhaust and I can assure you all my exhaust work is properly done, not simply "chopped up." The basis I have for not really jumping on a new exhaust system is that the Honda exhaust systems are usually quite efficient. I remember when I had my 00 Accord V-6 they dyno tested a car before and after with a megan exhaust and it gained .5 HP and lost 2lbs of torque. The comptech was the best exhaust for the accord and it barely had gains. Granted of course the Acura exhaust is a lil different and I have seen a couple dyno's but I am not sure if I want to give up the factory look in favor of a couple horsepower. Already have a test pipe also which I noted in my first post. I am thinking j-pipe and pre cat deletes sounds like the ticket I will probably go with. That way I can still go with the ATLP exhaust down the road if I choose to.

 

Not to rain on your parade, but if you want to get close to 300, you're going to need a full exhaust and J pipe. On a Type-S, you will gain a solid 10whp from a good cat back alone and maybe another 10 from the J pipe. I saw your other thread where you were at 261whp with your current mods. Was that with your third cat already gutted or not? Either way, I don't see 300 happening until someone can crack the ECU. Maybe ~285, which is nothing to sneeze at. You can also look into eliminating the primary cats.

 

Good to see you TLFourplay!

Agree with anx1300c 100%.

 

anx... don't jump the gun... I am at 269hp/220tq.... on an AUTO... you can figure he will be at 290

 

Well, 290 is kind of ~285, although I don't really understand what your 269hp has to do with his 261. So you think he'll get 29hp from exhaust mods?

 

Welcome back!

Glad to hear you're ready to do some more work on your car. You get it out of storage yet? How'd it hold up?

I say option 2 and think you need the fe HP a good catback will give you if you want to get to 300 WHP.

And as mentioned, ProCats now seem a questionable investment.

 

I am aware that you can't add up mods mathematically... but the op being 6speed... his car responds better to mods... since I dyno'd at 269... figure 10%-15% hp gains to that... know what I mean

 

I know what you're saying, but I think your car, along with Blackura's, may be factory power freaks. The only relevant figure here is 261, since that's what he dynoed with underhood bolt-ons and Stage 3 exhaust. Even if he does main cat deletes, I don't think he will surpass 285. I'd love to see someone break the 300 barrier, but without a re-flash, I don't see it happening.

 

tl four play... is god, don't sleep, I still show my buddys his 1/8th mile videos...

 

300whp N/A is very, very possible, but only with a 6MT

Like stated... me and stillhere have hit good numbers... hes got 269 (before his jpipe) and i've got 273 with jpipe, but no pro-cats.

I hit 273whp with ATLP JPipe, ATLP Exhaust, UR Pulley, AEM CAI, P2R TB Spacer, OE IM gaskets. now given the math ratio behind 6spd vs 5AT.. i would expect similar mods on the 6MT type-s to yield....hmmm... 285-290whp... easily.....

In regards to the OP... TLFourPlay WELCOME BACK!! ITS BEEN A WHILE!!

Yes, certain amounts of backpressure are always needed..... which is why i think its a BAD IDEA to do precat deletes, along with a test pipe.. now you have almost no restricition on your exhaust system, and you may (i repeat, MAY) lose power. you might not.

I think the best method for all of us, who are trying to climb to 300whp (N/A) would be to do pre-cat deletes, while retaining the 3rd cat.... (as a slight bottle neck for backpressure)

the addition of just a test pipe might yield 3whp or so... richie v6's precat deletes yielded about 15whp on an accord V6 (7th gen, similar to our TL).. but together, i think you are entering risky waters with backpressure issues... but again, I am no exhaust engineer..

just my

 

I am still in Iraq, been here since July 27th and I wont be back in Germany until the october time frame. I am taking R&R in july though and want to pull my car out then and do some work to it.

Thanks for the welcome back's and all, I havent had much time until recently to get on the internet much.

I understand what everyone is saying about power gains and the 6mt and all that stuff. The exhaust isnt the only route I am going though I have other things that I am planning on doing.... Although the general consensus is that everyone thinks the cat back will be the best route to go and no pro-cats. With the j-pipe of course. So I have seen a couple j-pipe's out there is the ATLP the better one? Is there clearance issues with it and the oil pan?

 

Sounds like you need a new mechanic if he's saying the motor needs backpressure You NEVER want backpressure, EVER. The key to naturally aspirated exhaust design is exhaust velocity and bigger pipes and higher flow is NOT always better. You need to match the exhaust flow to the exhaust pulses exiting the motor. The key is to keep the exhaust velocity high during all rpms, this includes keeping the exhaust hot. Adding too large of pipes will cause the exhaust gases to cool quickly and become turbulent in the pipes and will cause restriction or what many refer to as a loss of lower rpm torque.

 

mike fixed the clearance issue on the atlp jpipe... either route you go they will both provide more gains... although there is no dyno sheet on the richi v6 jpipe to show what gains they would give on a tl, you'll be set whichever way you go, but I do think the precatdeletes will definitely add some top end power

as far as the backpressure argument, it continues

 

300 wheel horsepower out of a normally aspirated TL? Sorry I am calling bullshit on that. Maybe on a very generous dyno when its -30 outside with zero humidity and 9,000 RPM. If you can increase your HP by almost 1/3 you should quit your day job and go work for a NASCAR team.

 

^ i pulled 273whp with my 5AT...and it was the same dyno that only showed 227whp on my 06 5AT... so the dyno isnt over generous

300whp is definitely possible with a 6MT.... jpipe and exhaust should bring his car over 280whp.... couple little things here and there, and he'll be able to get it...

we had 3.2L base TL 6MT's getting around 261whp with procats a while back...he pulled 261whp without any "REAL" exhaust work... i.e., jpipe, exhaust, some form of high flow cats/cat delete....

 

TLFourPlay... looks like in your sig, you dont have the P2R spacer... definitely worth it IMO over the OE TB gasket... should be good for at least another 4~ whp

 

I can't wait till his type s is out of storage

more autobahn vids

 

I'm not sure where you get 1/3 since stock 6MT's are ~250 whp stock. Works out to 1/5 with my math.

 

Yea. Stock 5ATs are good for like 235-240whp... .6MT should be around 245-250whp.... (TL Type S)

 

Ok cool man I was wondering about that, I was pleased with the OE version but I did see a couple pics and the p2r looks better. Thanks.

 

it also has a small bung for dry nitrous kit

 

getting to 300 WHP on a TL-S is doable, but there is a bit of work that is going to be involved.

You would need almost every mod available to the TL to get that power:
J Pipe
E-Shift Pro Cats
Cat-Back Exhaust
Cold Air intake
UR pulley
P2R Spacers
P2R intake Runners
Port and Polish on the motor
Port and Polish on the Throttle body
Heat Wrap CAI
Sea-foam cleansing
Lightweight Rims
Better Tires
Light-weight lugs
Lightweight brake rotors (2 pc rotors I think)
6 speed transmission as well

Also to handle that much HP in a TL, you would also need to upgrade a little bit of the suspension, such as getting a coilover setup and Rear sway bar.


Also question for you guys, can UR make any other lightweight pullies for our car, the weight reduction of the pullies help reduce the amount of time it takes for the motor to reach peak power, so getting faster to peak power would also help with having a better car for racing...