Heeelp! - first time build. Have I stuffed up?

[brent]

Hey guys

Have started my build using a turbo with a 2” compressor inducer and have based my combustion chamber off the 2xD for the flame tube diameter and 6xD for the length...

Have just found some information that for a turbo of my size I should have made my combustion chamber 3xD...

So my flame tube is 4”dia x 12”
And my outer housing is 6”dia x 12”

Want to confirm if it’s actually going to work or not?

Thanks,
Brent.

[racket]

Hi Brent

If using propane fuelling then your 4 inch flametube diameter will be OK

Cheers
John

[brent]

Nov 23, 2018 22:37:47 GMT -5 racket said:

Hi Brent

If using propane fuelling then your 4 inch flametube diameter will be OK

Cheers
John

Hmm was hoping to use diesel/kero... what would be the largest inducer size the 3xD rule apply to?

[racket]

Hi

I think with your 2" inducer you'll get away with the 4" FT even with diesel/kero as long as your atomisation is good , so get the fuel pressure up as high as you can

Cheers
John

[miuge]

Our bike had a 2.2" inducer turbo with a 4.5" x 13" FT, worked quite OK with kero/diesel too.
As John mentioned, high pressure for a simplex nozzle is highly recommended, EFI pump will barely do.. I'd say 4 to 5bar over P2 will make a good atomization on a typical burner nozzle.
With an evaporator type combustor you'll be good with less fuel pressure, also pump flow requirements are fairly low for the size of comp.