# Possible to build a 400whp sr that spools by 2000-3000rpm? **URL:** \ **Category:** SON240sx Automotive\ **Created:** [June 30, 2007, 7:19am UTC](https://forums.speedlife.net/t/possible-to-build-a-400whp-sr-that-spools-by-2000-3000rpm/107276 "2007-06-30T07:19:10Z")\ **Posts on this page:** 1\ **Showing post:** 62
**Author:** ![TM1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tm1/32/5517_2.png) [@TM1](https://forums.speedlife.net/u/TM1)\ **Post date:** [July 11, 2007, 5:11pm UTC](https://forums.speedlife.net/t/possible-to-build-a-400whp-sr-that-spools-by-2000-3000rpm/107276/62 "2007-07-11T17:11:19Z")
> [@YAAAAA!!!!I get to spend a lot of money on...](https://forums.speedlife.net/t/yaaaaa-i-get-to-spend-a-lot-of-money-on/13230/7): > > as a scoobie owner IHI twin scrolls are NOT cheap and the header you’d need would not be a cheap fab for a I4… a VF22 which is an older JDM STi turbo is a non BB IHI turbo, it’s good for ~350AWHP ( on a 30% driveline loss) with a spool at ~ 35-3800rpm. THE VF39 BB is also an option but it’s more then a VF22 (~$ and designed to make 300ish on a 2.5L at ~3200). > > other options, other then garrett are the Td05-20G or a Holstet HX35 > > nothing beats a built rotory baby!! True, not cheap, but certainly a viable option to dreaming about variable vane technology that most people wont be able to find for a 2 liter… 🙂 --- _[View the full topic](https://forums.speedlife.net/t/possible-to-build-a-400whp-sr-that-spools-by-2000-3000rpm/107276)._