OK who's making these?

[Shane@DBPerformance]

Why would velocity stacks be more beneficial in an NA environment, besides the fact that NA guys are often trying to squeak out every last HP.

[npaulseth]

Originally Posted by ecoli

Why would velocity stacks be more beneficial in an NA environment, besides the fact that NA guys are often trying to squeak out every last HP.

In every document I have read, they did not have seperate sections for FI and NA intake manifolds. I have done a bit of research on the subject, and basically have read that velocity stacks are good for NA and FI manifolds all the same. I have given JET the same reading material for his design on KA24DE manifolds that he was thinking about making a while back on NABR. I'll post up the link when I get home to the PDF I am siting.

[Shane@DBPerformance]

If they make power on an NA application, shouldn't they make power on a boosted application? Do they add power on an NA application?

[niterydr]

Originally Posted by ecoli

If they make power on an NA application, shouldn't they make power on a boosted application? Do they add power on an NA application?

I am thinking they are acting as a restriction on the turbo applications.
All I know, is all the digging I've done, I have yet to find concrete proof as far as a turbo'd application is concerned. Alot of the intake manifold design has been taken from N/A applications. In N/A applications, they have been proven to open up the rpm range and add power in some instances. I haven't seen anyone do back to back research on a FI setup.
To me, someone saying that you MUST have velocity stacks on a intake manifold (on a turbo car) just annoys the piss out of me.

[Shane@DBPerformance]

Originally Posted by niterydr

I am thinking they are acting as a restriction on the turbo applications.
All I know, is all the digging I've done, I have yet to find concrete proof as far as a turbo'd application is concerned. Alot of the intake manifold design has been taken from N/A applications. In N/A applications, they have been proven to open up the rpm range and add power in some instances. I haven't seen anyone do back to back research on a FI setup.

It shouldn't matter too much if it's FI versus NA. At WOT in an NA application, you aren't at a perfect vacuum, you are really usually at ~14.7psi absolute. Just because we as humans don't feel the pressure, doesn't mean it isn't there. So, I don't see why at 30psi or whatever absolute pressure, it should be any different.

Velocity stacks are definately not necessary. You can make just about any design for a sheetmetal intake on a DSM and see significant gains in the upper RPMs.

[97GSXAWD]

Heck I'd even donate some dyno time if someone wanted to test them.*

I am more than game if you want to do some testing on my car once it is running. It would be nice to see actual results from a dyno.

[AJ]

Can we just stick to the discussion and have some people stop trying to get under others skin over and over? The answer to this thread was solved on page one. And several other valid points where made otherwise. If someone want to continue the discussion, make a tech thread for that reason. If someone doesn't want to take part in that discussion then feel free to ignore it.