I'm looking for a Prototype Racing aluminium 3" velocity stack, I tried to contact them at joe@prototyperacing.com but nobody answered me.

where can i buy one of this velocity stack?

Thanks.

 

Do a search for DDD here on honda tech he will hook you up or email him at shiftaaa@yahoo.com

 

Thank you brewer15650 !!

 

that setup brewer posted is not taking near full advantage of the stack. its a very bad representation. i would fix that

 

dont IPS have the prototype stacks for $70, this excludes the pipe and silicone connector though

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote">that setup brewer posted is not taking near full advantage of the stack. its a very bad representation. i would fix that </TD></TR></TABLE>

Please explain ... I am very curious to where your are going to take this.

 

yeah the point of stacks is to gather air around the base of the lip. his filter blocks that option off

ill email you a paint drawing.

 

Actually ... Prototype Racing designed it to have a filter, so I ll kind of agree on your flow statement but your 1st statement is untrue of the purpose of the original design

 

its not untrue since i said FULL advantage. im sure its helping. but taking the filter off cant be argued as a loss in power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote"> but taking the filter off cant be argued as a loss in power.</TD></TR></TABLE>

No loss no gain .. I dynoed it 1st hand on our Dynojet... BTW you are still getting air from the 6" portion as the filter is clamped on the land of the stack. The full radius of the stack is exposed inside the filter and the filter is so large that it flows enough air volume as not to starve any run of the mill NA motor. Even high HP motors won’t be starved by the filter. So use it and save your motor ... enough said!



Modified by DDD at 8:11 PM 12/14/2005

 

youre still not getting the air from behind the lip. not 100% at least.
sorry

 

Quote, originally posted by brewer15650 »
DDD personaly dynoed his car with and with out the K&N Filter using the prototype racing V stack and there was no lose in power anywhere. Check it out here last post https://honda-tech.com/zerothread?id=1018645&page=3

BryanPendleton
I've gone through that thread. I have run 6 more analysis's using 3 different v.stack configurations. I am also using a more "complex" model which I feel better models the application. I am finding that the cone filter does influence flow rates, but the gains or losses are realistically probably negligible. The 3 configs I studied only differed by 1% at most. As I suspected though the designs better suited for a filter lost flow rate without a filter the design better suited for no filter lost when I added the filter. Reasoning for this, I discuss above somewhere, but basically it comes down to trying to "steer" the pressure gradient towards the air supply.

But again the differences are very very small.

dfoxengr you can read more about it here https://honda-tech.com/zerothread?id=1450472&page=3