compound questions

[fspGTD]

Guys, you can size the outer turbo of a multiple stage turbo using methods and equations as given in hugh mckinnes book. "turbochargers". (the chapter that's all about multiple stages turbos may be called "diesels" or "diesel tractor pulls" or something like that.)  I used to have this book but unfortunately now it's missing...   :cry:  must have been "borrowed" by one of my friends who hasn't returned it.  But I clearly remember an entire chapter showing an example of how to size multiple-staged turbos.  They even work through how to size 2-stages of turbos on an example engine.  You basically work from the inside turbo outwards as you do the sizing, IIRC.  Bell's book doesn't cover multiple stages.

[web]

You basically work from the inside turbo outwards as you do the sizing, IIRC.

Ah, right... sounds "easy", ahem...

About the K24... well, it's roughly 1.5 times bigger (in flow) than a K03 judging by some flowmaps that you can find on the web.

IF I have an understanding of this now, the K24 will start helping along really soon and limit the K03 through backpressure. Likely the K24 will end up doing a large share of the work, but 30 psi of boost should still be easy, with the K24 supplying 15 (2:1 PR) and the K03 the rest (1.5:1 PR). The K24 may be nearing its useful limit at that point, effectively feeding a 1.5 times bigger engine than usual. As if you'd put it on a D24 volvo.

30 psi of boost could make like 140 hp even on a 1.6 though Imagine that... and if the engine has not exploded yet, you could get a bigger outer turbo, or move the K24 inwards and get a REALLY big outer turbo...

Marcel

[fspGTD]

I used to have this book but unfortunately now it's missing...   :cry:

Well what do ya know... my brother was in town, staying at our mom's house and he said he found a really neat book over there that he started reading called "Turbochargers"... I guess it turned up!