velocity stacks

[ms372]

does anyone make them for the s65? and would there be any power increase ? im sure the car will sound amazing

[joeszM3]

I would only use ones that have filters. Are you planning to use open stacks? That could be tricky.

[tdott]

[regular guy]

Keep in mind, the FluidMotion stacks seen above required a tune JUST TO EQUAL stock power output. In other words, they lost power all on their own.

[Eminenceo3]

Yeah, but thats pretty cool.

[Harry Da Hamster]

Originally Posted by regular guy

Keep in mind, the FluidMotion stacks seen above required a tune JUST TO EQUAL stock power output. In other words, they lost power all on their own.

Where did you get this information from?

[joeszM3]

Originally Posted by regular guy

Keep in mind, the FluidMotion stacks seen above required a tune JUST TO EQUAL stock power output. In other words, they lost power all on their own.

Makes sense. If you are sucking in more air, the ECU needs to account for that with a more optimal AF ratio. A stock ECU is probably confused by the leaner mixture and as a result pulls back timing as a safety precaution.

[Ging]

The stock intake plenum and velocity stacks are tuned to the s65. Removing the plenum not the best idea for power Here's a good read

[regular guy]

Originally Posted by FNG

Where did you get this information from?

This isn't the first time these have been discussed...or the second...or the third...

http://www.m3post.com/forums/showthread.php?t=550899
http://www.m3post.com/forums/showpos...5&postcount=13
http://www.m3post.com/forums/showthread.php?t=748346
http://www.m3post.com/forums/showthread.php?t=611522

[joeszM3]

So to sum up, if OP wants a slower car that sounds wicked, install velocity stacks.

[regular guy]

Originally Posted by joeszM3

So to sum up, if OP wants a slower car that sounds wicked, install velocity stacks.

+1

And runs the risk of ingesting dirt, rocks, and sand into the engine while running. Such an amazingly great idea.

[Harry Da Hamster]

Originally Posted by regular guy

This isn't the first time these have been discussed...or the second...or the third...

http://www.m3post.com/forums/showthread.php?t=550899
http://www.m3post.com/forums/showpos...5&postcount=13
http://www.m3post.com/forums/showthread.php?t=748346
http://www.m3post.com/forums/showthread.php?t=611522

First of all i did search the forum and i did do my research. The links you posted were mostly garbage...

Your second link is a single post with a picture and a link. No information at all.

Your third link is completely heresay as there's absolutely no first hand information and only guesses. No real information here.

Your fourth link has absolutely no information at all besides a link.

So do your research before you flame or you'll just end up looking like an idiot.

The first link has a guestimate from FMU with an estimated horsepower increase of 5-20 horsepower. Though the horsepower estimate doesn't seem much, it proves that your first post in this thread is horseshit and you have absolutely no clue what you're talking about.

[regular guy]

Originally Posted by FNG

First of all i did search the forum and i did do my research. The links you posted were mostly garbage...

Your second link is a single post with a picture and a link. No information at all.

Your third link is completely heresay as there's absolutely no first hand information and only guesses. No real information here.

Your fourth link has absolutely no information at all besides a link.

So do your research before you flame or you'll just end up looking like an idiot.

The first link has a guestimate from FMU with an estimated horsepower increase of 5-20 horsepower. Though the horsepower estimate doesn't seem much, it proves that your first post in this thread is horseshit and you have absolutely no clue what you're talking about.

LMAO. Actual dyno results have been discussed somewhere at some time. I posted what I remembered. Take it or leave it. Sounds like you want to leave it. BTW, the way I read the 5-20whp guestimate was based on a generation-1 design...so not exactly a guestimate from what I was thinking.

Not sure how you thought I was flaming you...but whatever.

Just a quick question for you...if the dyno results were good and better than what they posted, then don't you think there'd be an update?

[joeszM3]

So do they make power or not? This discussion is all over the place. 5-20HP is also a pretty broad range.

[s85e90]

Originally Posted by regular guy

+1

And runs the risk of ingesting dirt, rocks, and sand into the engine while running. Such an amazingly great idea.

You could run filters on em

[regular guy]

Here's exactly what they said in the earlier post:

Originally Posted by FluidMotorUnion

Given our previous setups, and the previous setups on this specific engine, I'll give you the very wide and not-ballparkish-at-all range of 5-20whp. Once we get 'er on the dyno, we'll see.

We know they hit the dyno because there's at least three different videos of the dynos on youtube -- all without showing any data. Here's one of the videos:

I searched their web site for dyno charts and couldn't find any -- even though they post dyno charts for virtually every other project I saw. In response to questions in the youtube video above, FMU claimed to make 30whp when used in conjunction with a tune. Now keep in mind these are not only velocity stacks, but offer methanol injection as well. Here's exactly what they said:

Originally Posted by FluidMotorUnion

We developed an alpha-n tune specifically for these stacks, and we found gains at or around the 30 whp mark.

To understand what this means in perspective, here's a dyno chart showing a baseline + meth injection on an NA S65. This dyno chart shows NO TUNE, and is METH injection only. In this dyno, the meth injection added 28whp.



Next look what happens when you add tune+meth. The following dyno chart shows a 42whp gain. There is the additional 2nd CAT delete in this chart. But the 2nd CAT delete has been dyno'd a few times separately and shown no real gains. The 42whp gain seems reasonable for tune+meth because S65 tunes typically add somewhere near 15whp-20whp (provided the tuner isn't manipulating the results).



So now let's not bullshit ourselves and call each other liars about these results. 30whp results with tune+meth means they lost power with the stacks. You do the math. If Vishnu gained 42whp from tune+meth, and FMU gained 30whp from tune+meth+stacks, you're either going to conclude FMU is the lamest tuners on the planet or their velocity stacks lost power -- lost about 15whp of power.

In my experience when somebody says they will post the dyno results as soon as they are available, then drops off the face of the earth without ever posting again...it usually means the results sucked (especially when you find videos of the car on the dyno). I realize it's all conjecture, but it's not rocket science to figure out why they left and never came back without posting the results.

Originally Posted by FNG

Though the horsepower estimate doesn't seem much, it proves that your first post in this thread is horseshit and you have absolutely no clue what you're talking about.

Really? Want to repeat that now?

[Richbot]

I would be much more interested in a tunnel ram intake for the M3.

[Sered]

Originally Posted by joeszM3

Makes sense. If you are sucking in more air, the ECU needs to account for that with a more optimal AF ratio. A stock ECU is probably confused by the leaner mixture and as a result pulls back timing as a safety precaution.

Maybe if the ECU was designed in 1995 Modern ECUs run closed loop and are more than capable of handling increases in airflow.

What probably hurt it was loss of intake velocity and excess intake air temperatures.

[Sebringjetta]

Originally Posted by regular guy

Keep in mind, the FluidMotion stacks seen above required a tune JUST TO EQUAL stock power output. In other words, they lost power all on their own.

[coloradoe92m3]

Not surprising as the OEM ones seem much better in design given they are curved to create max velocity vs simply a straight table. Perhaps a supercharged or striker may see results with this

[MFL]

This is hilarious. Please call out probably the most researched guy on the board some more. Tell me how that works? Oh wait, it didn't..

[coloradoe92m3]

While I agree its hard to argue a point with someone having the accepted most knowledge in any situation, I'm sure you can see per the worlds history that blindly following without questioning is not good. So I woulnr have called anyone our, it did lead to done nice posted info and learning. As well as the supreme being is forced to explain and catch any flawed thinking on their part. Checks and balances