A day on the flow bench

**SloRice** · 02-15-2009 04:19 AM

well...now you all know who didn't get laid tonight....

Let me know if this works David. I can modify it as necessary for you.

**blackout** · 02-15-2009 10:31 AM

Thx for taking one for the team man! lol

Question for you Dave?
I know the V2 outperformed the ams manifold and now the ported stocker beat out the V2 up to 8000 rpm. On a 42r would it be beneficial to get rid of the ams manifold and go with the ported manifold and TB? I realize it would lose power up top over 8000 but shouldn't it help spool and midrange? just wanted your thoughts on it. thx

**David Buschur** · 02-15-2009 12:09 PM

Yes Slorice, you did NOT get layed last night! haha. Thank you for the graphs. What I want to really do though is take three screen shots from the AEM and put them over top of each other. I don't think it is possible.

On the GT42r, I agree the stock intake would give it more low end but with a GT42r you are really looking at power in the HIGH RPM and I don't think a stock style intake is ideal for that.

**SloRice** · 02-15-2009 02:51 PM

That will be difficult to overlay the logs. I can dump all of that info into one log for ya.....will just be a big mess though.

**David Buschur** · 02-15-2009 03:12 PM

What I'd like to do is open each of the three logs in AEMLog and then zoom in from 3,000 rpm to 8,000 rpm, precisely. Then take a screen shot of it, do that to each one and somehow put them right on top of each other. This would show how close they really are. Does that make sense?

**SS Laser** · 02-15-2009 04:36 PM

Here is dyno info and flow bench info for another modified stock Evo manifold.

http://www.mitsustyle.com/forums/showthread.php?t=22227

Thanks for all the work Dave.

**David Buschur** · 02-15-2009 04:50 PM

The flow bench numbers look to be inline with the same thing I found from end to end, a little lower than this bench flowed but we don't know at how many inches the other bench was run or the type of bench. Looks right to me though.

The dyno numbers on the other hand do not jive with what I am seeing or what I'd expect to see. Gaining that much over the stock intake at low/mid range isn't anything I have seen on any intake or port job. All that port work and the intakes made no more power at high rpm over the stock intake makes it seem even stranger to me. Everything I have done and seen are the exact opposite.

No bad mouthing the testing, just stating it is different than what I've seen.

**SS Laser** · 02-15-2009 06:35 PM

"No bad mouthing the testing, just stating it is different than what I've seen"

That is why I posted it. Just so you could see it.

I would still love to see how the flow changed with your half and half manifold on the flow bench. I need to go back and look at the intake testing thread to see how the power was effected by the plenum change.

Take care.

**vwjeff** · 02-15-2009 06:52 PM

To me its amazing that David does a manifold test and someone else goes and does the samething 1 week later

**SS Laser** · 02-16-2009 12:48 AM

This guy is from the same "board" that did the DSM manifold flow bench testing. So I guess it all ties together?

**1fast99** · 02-16-2009 08:22 AM

slo rice please empty your pm's thanks.....

**David Buschur** · 02-16-2009 10:38 AM

Is the guy doing the flow bench testing's screen name IROC?

**David Buschur** · 02-16-2009 04:33 PM

Back on the flow bench today.

I cut the runners and plenum off one of the stock intakes that we had been porting on. I needed a flange to start testing with.

We got our runner material in today and I cut a short section of the tubing and had Trent weld it to the head flange. The runner is rectangle shaped very similar to the stock head port.

I then placed the head flange with this runner on the flow bench and flowed that runner.
298 CFM.

Very interesting that it flows that low. That is inline with the stock #1 runner on the stock intake with no porting and the plenum intact.

I then placed the velocity stack we plan to use on top of the runner and holy crap did the flow pick up.
382 CFM.

That is a huge increase. As I have been studying the design of the stock intake it all makes more and more sense as time goes by. If you take a look in the plenum of a stock intake you will see that the plenum itself acts like a funnel on the top and back side of the runners. It directs the air right into the runners.

When I started really thinking about all of this a few weeks ago the one thing that did not make sense to me in all the designs I was seeing was the plenum/velocity stacks. All the plenums have a big flat floor in them by the runners and they all have the velocity stacks raised up from the floor. I am no engineer and probably won't even get to play one on TV (haha) but to me, it doesn't make sense. If you put that in the bottom of a bucket and filled it with water the water would not flow out of the bucket as good as it would if the velocity stack was on the bottom flush and it would never empty the bucket. Now that right there is some redneck fluid dynamics for you!!! (I'm hilarious today! hahahahahaha)

Anyway, I drew up a picture (with my daughters Crayola's-told you I was funny) of what I wanted and was mentioning it to someone else in the industry and he knew where I could buy exactly what I was looking for. This is making the project go much quicker than I had originally expected. When I'm done if it works I'll let everyone know where you can buy the stuff if you are interested.

I'm not getting my hopes up to high on anything since the flow bench has basically lied to me so far but that is by far the highest flow of any port we have had on the bench yet. It seems promising even if it ends up for super high RPM only.

Thanks for reading.

**vwjeff** · 02-16-2009 05:51 PM

David what you said above is what I was trying to say in post 36

**David Buschur** · 02-16-2009 06:21 PM

Let me know next time you need help saying something Jeff, I am border line genius! haha

I have the plenum cut, inlets machined into it and the velocity stacks test fit. Tomorrow I will have our head flange and from there it's a matter of assembling it all.

Going to try a few things on the flow bench just for the hell of it. I want to know what we see on this compared to the others so I can get even more confused!

BTW, Jeff you signature needs edited. Someone doesn't want to be your friend anymore

**blackout** · 02-16-2009 06:24 PM

I can't wait to see how this performs! Hopefully very well!

**SloRice** · 02-16-2009 06:52 PM

Originally Posted by 1fast99

slo rice please empty your pm's thanks.....

cleaned out...send it on!

**SS Laser** · 02-16-2009 07:07 PM

Originally Posted by David

Is the guy doing the flow bench testing's screen name IROC?

I think you are asking me Dave? It is not IROC_G. It is Kracka on that same forum. He has a qoute from IROC_G in his sig. So take it as you will.
I am done defending another test. I was just making a point to Jeff. I do not what to clutter this thread. Keep up the testing!

**vwjeff** · 02-16-2009 11:09 PM

Originally Posted by David

Let me know next time you need help saying something Jeff, I am border line genius! haha

I have the plenum cut, inlets machined into it and the velocity stacks test fit. Tomorrow I will have our head flange and from there it's a matter of assembling it all.

Going to try a few things on the flow bench just for the hell of it. I want to know what we see on this compared to the others so I can get even more confused!

BTW, Jeff you signature needs edited. Someone doesn't want to be your friend anymore

What in the HELL did I do to the guy

I fixed that sig, thanks buddy for looking out!

I will get ahold of you next time I am having troubles with my wording oh great one

**celica2evo** · 02-17-2009 12:25 AM

Its easy Jeff, he has his panties in a bunch against anyone affiliated with Buschur.

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