jet pipe

[richardm]

Anyone has an idea about the jet nozzle exit area in relation to either the compressor inducer or the turbine exaucer of a turbocharger.

Think I saw something like 90 % to a 100% of the compressor inducer area should work fine, but that was a long time ago, so I kind go forget and it looks like black magic to me, no real explanation for those numbers...

[racket]

You could try 90% of the inducer area , but keep a close eye on your turbine temperatures , if they start getting too high , shut her down and open up the nozzle a tad more , if temps are low , reduce the nozzle size.

There are a huge number of variables which influence nozzle sizing , so it generally ends up a trial and error exercise getting just the right size whilst keeping temps at your design level .

[richardm]

Thanks!
As you said trials and errors.. There are tons of equations on the subject. Most I can resolve or get some help with. But one still has to get the right numbers to start with.

Black magic.. Or Pure F... Magic..

[racket]

Yep , with good comp and turb maps for a turbo its possible to design the jetnozzle sizing , but without them its trial and error