Who was the person that I spoke to with an interest in prototyping the initial design and R&D? It was a while back and my PM's were all erased.

Please contact me, or anyone that lives in/near the O.C. (Westminster), CA.


Thanks,

Mike
acuratlparts.com

 

Shot you an email Mike. We can do the prototyping ASAP! Lets get these members an exhaust !!!!!!!

 

We Want A DP!

 

im in the oc. fountain valley.

 

i think we just all want what is more or less essssential tuning parts for a turbo engine!!!

im getting antsy, may just do a custom exhaust with an E cutout. search youtube for it if not familiar.

 

I really don't really understand what you guys are talking about, but count me in for an exhaust system! LOL

 

hey mike so sorry, i just gave my RDX to my dad and i got a 2008 TL type S... im still interested in one of your exhausts for the TLs... but i just wanted to know if its allowed because the TL is on a lease!

 

as long as the modification is reversible (you keep all your stock exhaust components) you can do whatever you want to a lease.

day before you turn the car back in, switch exhausts, and put the stocker back on!

 

just as i hoped! thanks for clarifying man

 

1. '08 RDX PMM
2. JMJ3rd
3. RDXJohnny
4. BleuM&M
5. neo1738
6. mau108
7. RENARELLO
8. lilcasino
9. gsxterboy
10. mzhao84
11. MMike1981
12. JJog21
13. DreamRDX
14. sasair
15. chyllintsx
16. VeNeNo
17.hyspeed808
18.blued157
19. slykrdx
20. scottRDX
21.missjennieb

Alright guys. We are looking to get the prototype started in 2 weeks.

This will be for a cat-back system only right now. A down-pipe is always an option after we are done with this project depending on how the results go.

The system will highlight the following:

Dual 3.5 inch tips, double walled, polished stainless steel. (Slash cut or straight).
Most likely 2.75" piping, and a resonator along the mid-section. (This will keep drone to a minimum and should provide for a perfect balance between power and sound)
Solid flanges, mandrel bends, all hardware/gaskets included, and stainless steel piping as well.
Custom tuned muffler, straight through application, european exhaust packing, all stainless steel internals and externals.

Once the prototype is done, we will post some nice eye candy for you guys to look at and then deposits for this batch will open up.

Thanks,

Mike

 

uhhh dun think i can make this one..

 

Hopefully u guys post vids/sound....dont think id hop into buying without seeing and hearing it in motion

 

Of course not! If you would, let me show you this new magic black snake oil that I'm also selling... hehe.

Yes, of course we will be making the prototype, with pictures and a sound clip prior to anything.

 

Man Aznbo187. I give you props on the trial and error you did with your TL. I know the exhaust for the RDX is going to be awsome!! Can't wait to see and hear the prototype.

 

Coming from an Audi 2.0T and going through 3 exhausts, I have some experience in exhausts for boosted engines. Suffice it to say that turbo's like backpressure to enable low-end torque. I had a large diameter cat-back aftermarket and noticeably lost low-end torque, went with a same-as-stock diameter catback pipe (w/ a small resonator) and really noticed a difference.

Check out the exhausts from these guys, including their write-ups and dyno graphs for the 2.0T:

http://www.awe-tuning.com

 

I'd be interested...am I too late?

As long as it doesn't decrease low-end torque or increase turbo-lag, I'm in. Thanks!

 

That will def. be taken into consideration. It will be tested to retain and improve daily driveability, which will be the main focus point especially since this isn't really a drag car. I know a lot of people have been asking for a 3.0 especially since that's what Church automotive has done, I honestly think a smaller application will suit just much better for the demographic of users this exhaust is for.

A small recap of our goals:

Retain & Improve low/mid-range.
Improve driveability - better power curve all around.
Fully compatible with Hondata.
Minimal interior noise, throatier and full spectrum of rich sound!

Replaced you with chyllintsx (15) since he got a TL-S.

1. '08 RDX PMM
2. JMJ3rd
3. RDXJohnny
4. BleuM&M
5. neo1738
6. mau108
7. RENARELLO
8. lilcasino
9. gsxterboy
10. mzhao84
11. MMike1981
12. JJog21
13. DreamRDX
14. sasair
15. KraZy007
16. VeNeNo
17.hyspeed808
18.blued157
19. slykrdx
20. scottRDX
21.missjennieb

 

I think 2 1/2-2 3/4 is more than big enough

 

you can put me on the list, too, btw!


fwiw, Subaru's 2.0T excelled with a 2.75" pipe...3" was a little too much...but we have bigger engines, so I'd think either diameter would work very well.

 

Turbo's do not like backpressure, though at our power levels, 2.5 or 3" doesn't really matter.

 

not entirely true ... they don't like bottlenecks.

turbos, (more importantly) turbo seals, require atleast a decent amount of backpressure.

most turbo applications, you will find true 3" ID aftermarket exhaust. Most stock turbo backs (TBE) are between 2.5 - 2.75" ID.

 

How do you think backpressure occurs? with bottlenecks.

Turbo seals do not work on backpressure. No one slaps on an exhaust and starts burning oil. Most stock turbo backs are under 2.5" as well. stock exhausts are always a comprimise.

There is a reason why pretty much the entire aftermarket community that deals with performance related turbo engines standardizes on 3" exhausts. Visit an Subaru or SRT-4 board and see what the vendors offer and have dynoed.

http://www.tprmag.com/issue/5/5_turbo_exhausts.shtml

 

Cut n pasted:

"Unlike an all-motor exhaust system, a turbo exhaust system suffers no ill effects from going as big as possible. Bigger is better in this case. The bigger or larger diameter exhaust pipes allow the back pressure to be significantly less than the factory exhausts system. As a result, the difference in exhaust pressure before and after the turbocharger is increased. The increase in the magnitude of the pressure difference allows the turbocharger to reach higher shaft speeds at lower engine operating rpms. As a result, boost response increases and boost pressures increase. More boost pressure at the intake manifold results more power at the wheels. Can a turbo exhaust be too big? A turbo exhaust is too big if it drags on the ground or is too large to provide adequate sound suppression. For peak performance, most aftermarket turbo exhaust manufacturers will use the largest diameter tubing that can be properly routed underneath the vehicle. A muffler will be matched that allows an adequate amount of sound suppression. "

 

backpressure does not automatically mean bottlenecks ... going from 3" ID to a 2.5" is a bottleneck. Running cats/resonators/mufflers will also provide decent backpressure and is not the defintion of bottleneck.

bro, i came from an SRT-4 and a MazdaSpeed3. Many MS3's with a Full TBE have horrible smoke and oil blow by? You're not necessarily burning oil per say, however, it does indeed leak past the turbo seals.

Many in the industry stand by a 3" ID or 3" OD with a 2.85" ID. I'm not denying that, i am just simply stating that some backpressure is indeed needed and NOT ALWAYS a bad thing

the end ...

 

or it could just be that MAZDAS SUCK.

just playin.

 

The smoke/burning oil is usually from the PCV system since a pressurized crankcase under boost usually drives some oil into the vacuum lines and the oil gets sucked back in under vacuum and burnt. Throw on a TBE which usually removes 1 or more of the cats and you get more smoke.

Most of the DISI engines oil burning seems to be a startup issue, not when under boost.

So a cat/resonator/muffler isn't a bottleneck? 6 and half dozen man.

 

Since for some reason I can't edit, I'll just add, some backpressure isn't a big deal. I had my share of 3" catless exhausts that were too darn loud and would gladly sacrifice a few ponies for sane noise reduction.

 

Agreed, this has to be something I can live with on an everyday basis. A loud, droning exhaust will get old real fast.

 

alright, if you say so ... lol

I have had my fair share of open DP's, cutouts, NA and FI cars with everything in between. Boost spike is NOT a happy medium this day in age.

I have never had an FI car with a 3+" exhaust not have issues with smoke and boost spiking ...

 

Probably true for peak HP and Torque.

However, if you are trying to retain or even increase low end torque at a slight cost of ultimate HP and Torque, you want the turbo to spool faster, which requires some back pressure (same or slightly more than stock).

 

That is one of the main focuses. We will be testing different sizes and setups, but taking into consideration with the light amount of boost and mods almost everyone is planning to run in this car. A 3" diameter setup will most likely be pushing it, not in terms of power gains but in retaining all around drive-ability.

It's undeniable that with a larger pipe diameter, more drone and noise is induced. The only way to reduce that added noise is by adding longer resonators which to a certain degree will reduce flow and power. Now we're back to square one.

Although a 2.5"ID exhaust pipe is physically limited to a set amount volume that it's able to support at one point in comparison to a 3.0"ID, which is obviously not as much. But we CAN maximize the efficiency in a smaller diameter tubing by retaining the exhaust pulse velocity throughout the entire exhaust system so that the 2.5" pipe will maximize its efficiency not from the volume, but from maintaining the exhaust velocity (speed). This isn't the only way and it will come down to the actual testing that will tell us which setup the engine will favor.

 

What are you driving? I've never had a boost spike or smoking issue in anything I've driven from 80's turbo dodge to modern STI's.

There is simply no correlation between exhaust size and engine smoking.


Sorry, read the article. And seriously, simple physics, the less backpressure you have the quicker a turbo spools. And turbo engine is a dog off boost. Where are you getting your info.

Increasing Delta P over any restriction increases flow. I do this everyday in my job calculating flows and pressure drops. You increase the pressure drop, you increase flow.

 

boost spike issues with cars and a full TBE
2007 Mazdaspeed3, 2005 SRT4, 1997 Eclipse GSX, 1998 Fully Built FI Prelude.

All 4 FI Cars has plumes of smoke with a TBE installed ... Several i even ran open dp, and it smoke and smelled like ass...

i do agree, i have never seen an FI car have a "smoking engine" but i have seen HUNDREDS of FI cars with "smoking turbos"

EDIT: The World of Smokin Turbos ....

 

Smoking turbos or just the usual 10:1 OEM AFR pushing out black smoke (which is enhanced by a TBE and cat removal).

 

I also came from the 2.0T ('07 GTI) and concur that a 3" system is definately overkill for us. The 2.75" as proposed is a good compromise. I am also glad Azn decided to incorporate a center resonator (as I requested many times ). Will it be an 18" SS perforated core one? I still certainly hope that he decides to make a DP to complete the system.

 

yo cash...u seem to be referring to smoking turbos....is that just a result of your mazda or your other turbo vehicles as well. Mazda's have documented problems with garbage turbos, especially the unit on the CX-7, which was a modified Mazdaspeed turbo. blown seals, busted out turbos, and bad smoke, especially on the cx-7 & speed6. so...i guess my question is, is your experience with the smoke just from the mazda or every other car uve referred to.

IMO, the mazda is junk. youtube has a bunch of vids of people filming the "smoke" coming out of their exhaust so they can prove to the dealer itsa problem and they can "replicate it". so claiming its a result of the specifc exhaust im not really sold on since the pic you have is of the mazda with those specific problems.

 

both the cx7 and ms3/6 all have the same turbo, therefore, carry the same issues as far as smoking turbos. however, its only happened on cars with a 3" TBE. you won't find a smoking turbo on a stock TBE.

Agree with you there. Cat removal does indeed enhance the smoke...


I am not disagreeing with anyone in this thread. only trying to prove my point that some back pressure is need on FI applications. Complete lack of backpressure can have issues, that standard NA cars will never see. Thats all...

 

yea u will find a smoking turbo with stock exhaust. check the mazda boards, they are all over the place; mine would smoke all the time.

 

trust me, i'm on the mazda boards like white on rice ... lol ... search cashmere on www.mazda3forums.com or www.mazdas247.com

never saw a stock ms3 with a smoking turbo but I never really researched it thoroughly... either way, i trust ya ...

 

We are still looking for a test car in the O.C/LA area. This project is ready to go!