So I decided to create a turbocharger calculator. Unfortunately, I can't get to any google docs or the like to link the excel file to you (stupid websense). If anyone wants the actual spreadsheet before I post it up here, then PM me or drop a message here with your email and your version of Excel, and I'll shoot it to you. Also if anyone knows how to share an actual Excel file instead of converting it into something like Google Docs let me know.

It all started as me doing calculations for the data points for compressor map plotting by hand and getting fed up with it. I then decided to create a wonderful little calculator, but started thinking about a bunch of different inputs that would affect the numbers.

So I added them. All of them that I could think of.

Then I added BMEP and injector sizing for the hell of it, to tell what would be good/bad for a certain engine and if you need some rotating assembly work.

I understand that the general way of going about sizing turbos around here is talking to people who've done it before, but I figured this would be good for those weird, rare, interesting ideas that people sometimes come up with where there's no one to tell you what to get.

Thoughts? Ideas? Think I'm a retard for spending my time on this? Give me your input!

I should probably let it be known that the left-hand column values are the only cells that are editable, for ease of use and protection from piracy/copying.

 

I see you have target flywheel HP. how much HP do you lose trying to get the power to the wheels

 

There are a bunch of rules of thumb about drivetrain loss, but it depends a lot on the length / rotating radius / weight / CG of all the drivetrain components, so I figured it's not really in the scope of this calculator to try and compute it. I'm trying to be as accurate as possible, so I guess I leave it to whomever uses it to decide what kind of drivetrain loss they're getting.

...but the general rule of thumb is about 15-25% if you're looking for a number. Least for FWD, middle of the road RWD, most for AWD.

 

Finally figured out that I don't have to convert it into google docs to upload it to google docs >.<

Excel 2007:
https://docs.google.com/leaf?id=0B3d...MTFmODY4&hl=en

Excel 2003:
https://docs.google.com/leaf?id=0B3d...YzhiZTA0&hl=en