# BP Initiatives flow stack makes 5hp on the roadster

**URL:** https://forums.speedlife.net/t/bp-initiatives-flow-stack-makes-5hp-on-the-roadster/112812
**Category:** SON240sx Automotive
**Created:** [January 30, 2008, 12:19pm UTC](https://forums.speedlife.net/t/bp-initiatives-flow-stack-makes-5hp-on-the-roadster/112812 "2008-01-30T12:19:14Z")
**Posts on this page:** 1
**Showing post:** 11

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### Author: ![BAS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bas/32/5540_2.png) [@BAS](https://forums.speedlife.net/u/BAS)
#### Post date: [January 30, 2008, 11:49pm UTC](https://forums.speedlife.net/t/bp-initiatives-flow-stack-makes-5hp-on-the-roadster/112812/11 "2008-01-30T23:49:53Z")

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um… wow… comp. eff. is based on the shape of the compressor impeller and rotation speed of the compressor impeller… any gains in flow eff. would be measured in .001 bar range… and the first bend in the CAI to the compressor inlet negates any gain potential by a factor of 10… you have better gains in flow by using more advance compressor housings then any other ‘cold air’ side add on.

and there are many companies out there with ‘horn’ entrance profiles, HKS, Apexi, Blitz, tonnes of ebay knock offs even.

> [@Black turbo Camaro SS \> me](https://forums.speedlife.net/t/black-turbo-camaro-ss-me/15731/16):
>
> turbo cars will see it more as increased compressor efficiency, as the inlet pressure on the turbo will now be higher, the difference between inlet and outlet pressures are smaller, thus the temperature gain is smaller
> 
> intake air temps will therefore be lower. also in theory the turbo would spool faster, however it would be hard to notice in real life

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