# Rankins 1.8t DD build

**URL:** <https://forums.speedlife.net/t/rankins-1-8t-dd-build/243192>\
**Category:** Builds\
**Created:** [March 31, 2009, 8:47am UTC](https://forums.speedlife.net/t/rankins-1-8t-dd-build/243192 "2009-03-31T08:47:22Z")\
**Posts on this page:** 1\
**Showing post:** 61

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**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\
**Post date:** [April 1, 2009, 4:03pm UTC](https://forums.speedlife.net/t/rankins-1-8t-dd-build/243192/61 "2009-04-01T16:03:18Z")

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> [@so i've been inspired by track day](https://forums.speedlife.net/t/so-ive-been-inspired-by-track-day/16543/29):
>
> You do not understand the difference between flow, and mass flow.
> 
> If you were to hook up your manifold to a pressure regulator with unlimited flow, your Hp would be directly proportional to pressure. This is all i am saying.
> 
> All of your turbo statements have a lot more involved than just pressure. Obviously bigger turbos make more power.
> 
> other variables you are not accounting for.
> 
> -heat  
> -the area under pressure vs flow graph  
> -back pressure  
> -turbine acceleration  
> -compressor maps  
> -turbine efficiency  
> -windage losses
> 
> It is the combination of those 7 things and more that make your engine perform better than a K03 car.

youre arguing that a k03 will make 250AWHP though. youre crazy. it wont happen. its impossible, all the turbo is good for is a quick kick in the pants from the torque onset and a little midrange power. the turbine simply cannot keep up with the engines exhaust flow at higher rpms, the wheels and the housings are just too small.

-a k03 has no turbine efficiency when boosted beyond the stock settings(or compressor for that matter)  
-the compressor map puts everything to the far left and down towards the bottom(which is great for low end grunt)

- heat. thats all the turbo produces at higher boost levels
- back pressure. thank the stock 1.97" mk4 downpipe and the 2.17" b5 downpipe, along with the terrible housing design KKK/BW uses for that turbo in all configurations

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