john50

Great news!

Chronic14

Interesting, how much are you going to be selling them? Maybe we can get a group buy?

wspy

What about the down pipe?? Whats the status with production??
Last we heard they were still waiting on the parts [downpipe,cat] to come in!!

batman

Is Import Tuner going to put the RDX in their pages?

SinCity

aznbo187

iTrader: (1)

Finally got word back from Import Tuner. They will be doing the review on Thursday, so I'll try to get some pictures up from that day along with hopefully some good dyno result news. =)

aznbo187

iTrader: (1)

Alright, they postponed it to next week Tuesday most likely. Guess we will just have to wait.

aznbo187

iTrader: (1)

And they have postponed it again till next week. This is ridiculous.

mzhao84

wow....

DC-RDX

So, anyone have the vegas odds on the review being ready tomorrow?

mzhao84

any updates??

aznbo187

iTrader: (1)

UPDATE!
Finally pics and some numbers!

So we had a chance to get the results from the K&N facility, along with the pics. They tested the ATLP Exhaust, along with the K&N ram intake and the Hondata Reflash at their indoor facility.

Here is the stock RDX up at the K&N dyno facilty.


Here it is with the ATLP Exhaust. It will still retain a very OE look, while giving off a sporty vibe to it. In person it makes the back end look a lot more masculine like the infininty FX rear end.



We tested the RDX with the K&N intake and Hondata reflash. Opposed to our first dyno session, this one had a Hondata reflash while the first one did not. The gains after the chip were 7-10 whp/tq starting from about 1.5k - 6k. There was a solid increase mainly in low-mid range power, giving us a lot of added volume underneath the curve.

With the factory ECU, we had a higher peak gain where as the Hondata Ecu gave us a broader mid-range to play with. Both options provided a much better daily power band.

Interior noise is almost non-existant, especially compared to the intake. It's very non obtrusive. Outside, it has a very mature growl, and should probably have came like this factory, instead of the hissy sound it makes stock. =)

These cat-back systems are being started in about 3-weeks and this will be a one time run. This will be a limited exhaust system. To make your pre-order now, visit us at www.acuratlparts.com and check out online.

Click here to pre-order now!

cwepruk

Looks very nice. Do you have the dyno graphs? I'm interested in both the Hondata and stock ECU graphs.

Nice work!

mzhao84

WOW!! IM SO HYPED!!! 3 weeks time... YES I WILL HAVE 939.00!! woot!!

So, hondata ecu reflash gains 26 whp + ATLP exhaust gains 10 whp = 36whp! means the RDX will have over 270HP! WOOT!

Great job guys! Any new videos of the RDX on the dyno? new videos of the RDX with production ATLP exhaust? This isn't with the downpipe right?

GOTTSPD

That's not how it works. Each performance mod does not lead to a cumulative effect of increasing the HP #s. I'd be suprised to see much more than a 28-30hp gain (which is impressive, but is really just coming from the revised ECU). Now, the DP, that seems like it could be a big #!

mzhao84

hmmm... I never understand how HP calculation is calculated when it comes to added modifications. I just visited ATLP's site again and noticed they said +10 WHP and + 10 ft lb in torque with hondata ECU.

So does that mean the RDX only made such minute gains (exhaust gains + ecu gains)?


Looks like we're running into a similar problem as CPE CAI + Hondata ECU again... When combined, gains were minimal.

Another question, wouldn't having a Midpipe and downpipe with Hondata ECU reflash make minimal gains vs MP + DP w/o hondata?

If that's the case, why do we need the reflash since that seems to be unit that'll lower gains?

Maybe Hondata should reprogram their ECU to make more gains when combined with ATLP exhaust, dP, MP, and Cpe cai...

cwepruk

I'm guessing the +10 is over the Hondata baseline.

aznbo187

iTrader: (1)

The dyno was without the mid-pipe. We had a few difficulties with getting the mid-pipe ready, as we still needed to do a few touch ups on it and our initial prototype vehicle wasn't available. It's hard to do these parts because the people that want to work with us are dime a dozen with this chassis.

Anyway, to address your question as far as gains. The Hondata chip gives you about 26 whp over stock, without an exhaust. When you have an exhaust along with the Hondata reflash, you gain an additional 10whp/tq all across the band, except at/near the redline. This is due to the ecu, most likely the reflash over compensating a bit to keep it safe.

Either way, you will gain a rich power increase throughout the entire curve. This isn't to say don't get the reflash because the reflash will gain you the 26 whp as a starting block that you wouldn't have it you only had the exhaust.

Exactly. As you can see instead of adding 17whp on the Hondata's reflash, it gained 10whp. But as mentioned, it's not that straight forward as one plus one. The ecu reflash adjusts the maps differently than stock, thus it results in a different power curve with different mods.

I'll upload the video tonight for the dyno run. I don't have the dyno results printed as it's not supposed to be released until the magazine is out. As well as any pictures of the K&N products.

wspy

How is the production of the down-pipe progressing?
The majority of the power to be made from the aftermarket exhaust system on the RDX is found with the implementation of a larger diameter, less restrictive down-pipe!!

Hows that coming along...... or is it?

aznbo187

iTrader: (1)

The DP and Midpipe will have to wait. We don't have the test car on hand at the moment. But I will start a separate thread for that once I can fit it in.

TheWrench116

iTrader: (1)

so its 939. for a cat back?!?!? the early pics look like the second cat gets removed but the pic on this page it looks like its just an axle back. did i mis somthing?

aznbo187

iTrader: (1)

It's a complete cat-back. I only posted the the axle back section to showcase the new canister construction. The first one we were planning to use was a magnaflow muffler, but I decided it would be a better idea to have Stromung design a fully tailored one to the RDX to get a bit more flow and sound.

The cat-deletes as mentioned will be designed down the road. =)

cwepruk

Can you post a stock vs your exhaust comparison (side by side)

I would even think selling just an axle back might be worth a few $$$'s. Just thinking out loud.

legendkurado

+1

john50

Please clarify... Does the system eliminate the secondary cat converter? So many versions have been talked about, I'm unclear.

aznbo187

iTrader: (1)

The cat-back version does not delete any of the catalytic converters. =)

SinCity

I'm a little lost in reading this. Is this just a rear muffler section or does it include the mid-pipe from the furthest (second) CAT?

SinCity

EDIT: NM. I see Aznbo's 9/25 post.

007Acura

this looks nice, did anyone install one yet on their rdx?


this system reminds me of the prototype, acura basically sells the other accessories to make it look like that (19-inch wheels, rear diffuser, front spoiler)

SICKRDX

Does anybody know if this is still going to happen or has it been S-canned. I am going to go down to Labree Motorsports in Canoga park, CA and have them do a full Turbo Back.

SICKRDX

john50

This one seems to have gone dead. I really like Church Automotive's system, that appears to be a turbo-back (or at least apparently includes three muffler canisters). I talked with Church, and they're quite helpful, but I'm 2000 miles away from So Cal, and I'm a little uneasy spending that much money, to try and install it myself (Church reports it's an exact replacement for the OEM equipment, all made up on a jig, etc. so it SHOULD be easy), but what a hassle if I get the stock system off, and can't get the Church system, or any other long distance supplier exhaust system installed).

Church did advise to install the Hondata reflash first, otherwise the vehicle will run too lean. I respected him for telling me that. No one else has, and Church gets really high compliments from his local So Cal customers. Wish I still lived in Orange County instead of Texas.

wspy

www.AcuraTLParts.com is where you get the cat back!! Its available for $939.00.
There is a write-up in Jan '09 issue of Import Tuner Magazine!

MMike1981

- Pre Data: Horsepower 179 Hp at 5250 rev/min. Torque 193 Tq at 4350 rev/min.
- Post Data: Horsepower 196 Hp at 5500 rev/min. Torque 205 Tq at 4400 rev/min.

Serious with that HP increase? Just by a catback...?

john50

Couldn't find it on their website. Has anyone already bought a system, and done the installation themselves?

wspy

http://www.acuratlparts.com/products/3/

cwepruk

I have been waiting for some reviews/videos before thinking about this. I've had way to many loud/crude cars in my life, so I would like something fairly quiet. I know they seem to have done a quality job on this exhaust, but I just want to see some first hand reports first.

superpowers

i have this on pre-order...and i'm hoping it will ship soon...or atleast be in production.

then i'll be more than happy to give you geeks a review of how they are

john50

Explains why I couldn't find it. I was looking at the CP-E website.

I thought ATLP was taking orders and going to make a one-time production run last fall some time.

Has anyone one gotten the RDX exhaust system from ATLP? If so, can you help us with how easy it was to install, how loud it is, etc?

superpowers

any updates??? been awile!

aznbo187

iTrader: (1)

It's been a slow project, as we were waiting for enough people to start the initial run.

Sorry, yes we are currently producing these. Waiting for a few more components and these should almost be done. Hopefully you can write a 3rd person review.