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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Finally! Riss Racing Downpipes for 335.. Amazing Power Gains and Info Inside!



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      06-29-2007, 11:08 PM   #1
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Exclamation Finally! Riss Racing Downpipes for 335.. Amazing Power Gains and Info Inside!

Guys, I have not been this excited since PROcede came out and I am more than excited to share this information with you.

For the passed month I have been working with Riss Racing to help Develop products for the 335. (been droping hints all over the forum, but didnt want to release anything yet) The first idea that came to mind (well a lot came to mind) was to develope downpipes. We all know how restrictive the stock downpipes are having 2 huge cats on them as well as the small piping and crushed bends restricting exhaust flow! This I'm sure you all know that stock downpipes restrict our turbos and cause a lot of back pressure...etc

The passed couple weeks have been crazy spending night and day fabricating the downpipes for the 335, taking them off and on, off and on to make sure fitment is perfect!

As of now there is only one company to offer downpipes for the 335 and they currently sell them for 2800 dollars. Our idea was to make a product that is going to make more power and be cheaper to all BMW enthusiasts! I mean just because we have a BMW doesn't mean we should pay ridiculous prices!

We have Successfully Developed a perfect Prototype and it is ready for Mass Production.

Specs:
-Catless... These Downpipes REMOVE FACTORY CATS
-304 Stainless Steal
-Complete Mandrel Bend piping throughout downpipe
-3inch diameter Piping which tappers to 2.75inch at the end and has machined welded 2.5 universal flange to bolt to the stock/aftermarket exhaust systems.
-3 inch machined welded laser cut flanges to bolt to stock turbo and utilize stock band.
-Machine welded 02 sensor bungs for both pre and post 02 sensors
-3rd machine welded 02 sensor bung for anyone that would like to run a wide band...there is a bolt that plugs this if you do not want to use the 3rd bung.

Answers to questions that I know will come up... That I can help with
Is there a Check Engine Light?.... NO! Weeks of testing and no check engine light, both with and without PROcede.

Does 3 inch fit? Yes, we have successfully made 3 inches fit with no rubbing, touching, etc. Clearance is perfect, and to be honest there is more room now than there was with stock (having their bends and cats)! Also keep in mind at the end of the downpipe they tapper to 2.75 inches for perfect fitment to stock exhaust system

And the Real Question!!!
HOW MUCH POWER DO THEY MAKE OVER STOCK!?? Well this is the exciting part!

Here are all the Details on Before and After Dyno with just our first set prototype downpipes.

STOCK car STOCK DOWNPIPES secondary cats removed.
I DYNO my car STOCK with ZERO modifications on a DYNOJET.
Run Conditions: 69.9F Humidity: 42%
SAE with 1.0 CF and smoothing 5
76 pump gas
Max Power: 269.74 WHP
Max Torque: 279.33WTQ
Do not mind the PROcede DYNO over the stock graph!


STOCK car with Riss Racing 3inch Downpipes and NO PROCEDE on DYNOJET... We wanted to show true gains over stock!
Run Conditions: 89.4F Humidity: 26%
SAE with 1.0 CF and smoothing 5
76 pump gas
Max Power: 296.94- 26.7 Wheel HP increase OVER STOCK!
Max Torque: PEAK 328.68- 49.3 Wheel TQ increase OVER STOCK!

Again this is without PROcede or any other "chip".


We have 3 graphs to show everyone so there is no skepticism on it being SAE, STD, or uncorrected. WE are going to post all three so there is no controversy on the numbers being inflated...but for now to let you know STD was 304.05whp and 336.54wtq... and Uncorrected was 297.89whp and 329.72wtq.

Here is the STD graph


Here is uncorrected graph


We saw consistently 296whp SAE on all pulls and TQ started to drop a bit when car was getting heat soaked and hotter.

We Video Taped Every DYNO pull and showed the computer after the pull to show numbers and it being SAE, STD, and uncorrected... as well as showing the car with NO procede.... you'll actually see me holding PROcede in my hand in front of the camera after the pulls

IT would be great if Shiv can develope a map to really take advantage of these downpipes and make more power!! Shiv let us know what you think?

They will be posting the DYNO Graphs,Pictures and Videos ASAP as well as releasing information on time frame and Pricing (OK, I cant resist, they are being released very soon and for damn cheap!!)... I'm sorry I can not post them, They are going to post those themselves as they are new to the FORUM and want to show everyone what they are capable of offering the BMW Community for reasonable prices!

Remember these Gains are just with the Prototype and with the production piece we should see a bit better flow which might potentially make more power! We will know soon when the first batch comes

Enjoy, and please feel free to ask any questions or post comments!

Last edited by CASHBY; 08-08-2007 at 12:02 PM. Reason: typo
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      06-29-2007, 11:12 PM   #2
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Just spoke with them. They are going to be posting all videos, pictures, and graphs Tomorrow. Taking a well needed night off!
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      06-29-2007, 11:15 PM   #3
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Wow, very nice work CEA. I want to see how much they are going to charge for them, and a DIY to see what a PITA this will be without a lift.
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      06-29-2007, 11:19 PM   #4
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Solid.
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      06-29-2007, 11:19 PM   #5
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.........Wow....This is so f'n sick. Just....Wow.....
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      06-29-2007, 11:20 PM   #6
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So the Downpipe dyno was with the Stock Cat-Back correct?
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      06-29-2007, 11:21 PM   #7
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Its fairly easy to install doesn't take long. Its plug and play. For those of you in So Cal we will install.
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      06-29-2007, 11:23 PM   #8
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Quote:
Originally Posted by CanadianTSi View Post
So the Downpipe dyno was with the Stock Cat-Back correct?
Good question reminded me of something I forgot. This is with secondary cats removed as well.

However my stock dyno had secondary cats removed as well.
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      06-29-2007, 11:25 PM   #9
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CEA do you think just the DP's will work with the 135i? I'm first on the list for the 135i but I would buy these for my 335i and then switch them. We definately need Shiv to do a tune though, I would think just dp's deleting cats right next to the turbo's would be a better gain then an entire catback itself.
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      06-29-2007, 11:27 PM   #10
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Quote:
Originally Posted by CEA 3 View Post
Good question reminded me of something I forgot. This is with secondary cats removed as well.

However my stock dyno had secondary cats removed as well.
Ok so then the Downpipes where the only change. It was even 20 degree's hotter when they were dyno'd !!
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      06-29-2007, 11:30 PM   #11
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Sweet

Quote:
Originally Posted by CEA 3 View Post
Its fairly easy to install doesn't take long. Its plug and play. For those of you in So Cal we will install.
Wow stats look great.
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      06-29-2007, 11:32 PM   #12
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Quote:
Originally Posted by Cornhusker View Post
CEA do you think just the DP's will work with the 135i? I'm first on the list for the 135i but I would buy these for my 335i and then switch them. We definately need Shiv to do a tune though, I would think just dp's deleting cats right next to the turbo's would be a better gain then an entire catback itself.
u getting the 135i in the states??
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      06-29-2007, 11:36 PM   #13
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Quote:
Originally Posted by CanadianTSi View Post
Ok so then the Downpipes where the only change. It was even 20 degree's hotter when they were dyno'd !!
Stock DYNO, and DYNO with our Downpipe both have secondary cats removed.

But yes it was 20 degree's hoter which can make a huge difference...but we are happy with the results!
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      06-29-2007, 11:36 PM   #14
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I was expecting these results, but damn, very very impressive. No CEL either. I remember you dropping hints on the forums and asking some locals near you if you if they had an AT. Will there be any fitment issues with the AT? Also, I am assuming you are on 91 octane being in Cali, correct?

Lastly, did you make a dyno pull with the PROcede and current map? I'd would have been hard not to hook it up and make a few pulls

Judging from your mods on the Audis, its good to have someone like you eager to help get products out for the BMWs
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      06-29-2007, 11:36 PM   #15
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This is going to be a SICK setup. Maybe a Vishnu stage 2? And remember it would just be bolt-on's.
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      06-29-2007, 11:37 PM   #16
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Quote:
Originally Posted by Cornhusker View Post
CEA do you think just the DP's will work with the 135i? I'm first on the list for the 135i but I would buy these for my 335i and then switch them. We definately need Shiv to do a tune though, I would think just dp's deleting cats right next to the turbo's would be a better gain then an entire catback itself.
Hmm, great question. This is something we have not looked into.

We will be making them for the 535 as well.. the 135 is going to be hard to get our hands on, but if someone has one we would love to use it to develop a set for it.... so anyone in socal let me know and you will get a free set for compensation!
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      06-29-2007, 11:39 PM   #17
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Quote:
Originally Posted by CEA 3 View Post
Its fairly easy to install doesn't take long. Its plug and play. For those of you in So Cal we will install.
Wow I can't wait to get these!!! When will they be ready? Any idea on price yet? Do they bolt to the stock exhaust or do I need to weld them up?
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      06-29-2007, 11:40 PM   #18
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SICK!
and i'm in socal!! haha. i'm most definitely interested. BUT i'll need my car to get here first. lol. can't wait for dyno/video/price info.
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      06-29-2007, 11:40 PM   #19
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Quote:
Originally Posted by catm3 View Post
I was expecting these results, but damn, very very impressive. No CEL either. I remember you dropping hints on the forums and asking some locals near you if you if they had an AT. Will there be any fitment issues with the AT? Also, I am assuming you are on 91 octane being in Cali, correct?

Lastly, did you make a dyno pull with the PROcede and current map? I'd would have been hard not to hook it up and make a few pulls

Judging from your mods on the Audis, its good to have someone like you eager to help get products out for the BMWs
No pulls on PROcede sorry! we wanted to show gains over stock, but yes with v2.0 this car will make 400whp or more im guessing!!! I will dyno the first day i get V2.0 and let everyone know, but by then you should all have set of these DP's as well.

ADHD...great question. Fitment is for all 335, both manual and auto, sedan and coupe! Sorry another point I forgot to mention! Also yes NO CEL whatsoever!
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      06-29-2007, 11:41 PM   #20
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Quote:
Originally Posted by Terry335 View Post
Wow I can't wait to get these!!! When will they be ready? Any idea on price yet?
Terry, for sure you will get a set from the first batch... you actually inspired us to make the 3rd 02 sensor bung for people who want to run a wideband!

Thanks for the idea brotha!

timeframe I will let them go over as well as price.... god I just want to tell everyone right now, but I will say its going to be more reasonalbe then you can imagine!
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      06-29-2007, 11:43 PM   #21
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Quote:
Originally Posted by CEA 3 View Post
Stock DYNO, and DYNO with our Downpipe both have secondary cats removed.

But yes it was 20 degree's hoter which can make a huge difference...but we are happy with the results!
I'd say so, there aren't many cars out there that pick up 50lb/ft AT THE WHEELS!! with only Downpipe. Purely incredible gains.
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      06-29-2007, 11:44 PM   #22
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Quote:
Originally Posted by CEA 3 View Post
Terry, for sure you will get a set from the first batch... you actually inspired us to make the 3rd 02 sensor bung for people who want to run a wideband!

Thanks for the idea brotha!

timeframe I will let them go over as well as price.... god I just want to tell everyone right now, but I will say its going to be more reasonalbe then you can imagine!
Sweet!! You can borrow my dynoscan software and wideband to screw around with if you need. Just let me know.
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