Thread: 4BD1T Turbo Sizing and Performance Prediction.

I found this map for a TD04H-19T 6cm turbine with:
Compressor: 46mm, 58mm
Turbine: 41mm, 47mm

I overlaid your 4bd1 No IC graph.




Edit: The turbine on the ebay Kinugawa is a bit bigger at 45.6mm / 52 mm. Not sure how different that would make it?

Originally Posted by Judo

I found this map for a TD04H-19T 6cm turbine with:
Compressor: 46mm, 58mm
Turbine: 41mm, 47mm

I overlaid your 4bd1 No IC graph.




Edit: The turbine on the ebay Kinugawa is a bit bigger at 45.6mm / 52 mm. Not sure how different that would make it?

The 4BD1T intercooled graphs to 30psi still fit very nicely on that map. For turbines, the HE221 is a Holset special TD04HL-19T with a 60mm compressor. The HL turbine is slightly bigger than the H turbine and users report excellent spool on our size diesels.

Be aware that before you plot PR and air flow onto a compressor map, you first need to correct the air flow for the inlet conditions, pressure and temperature, used to create the map. Also the air flow needs to be converted to the same units.

With that map, i see the inlet temperature is 20C, but can't see the inlet pressure, and the air flow is m^3/sec.

To correct for inlet conditions, where:
Pin and Tin are your inlet pressure and temperature
Pref and Tref are the inlet pressure and temperature used for the map

Then corrected mass flow is:
Mcorr = Mcalc x (Pref / Pin) x sqroot (Tin / Tref)

Obviously Tin and Tref are same units, and Pin and Pref are same units. For example Garrett use 28.4 inches of mercury for reference pressure and 545R for reference temperature.

I haven't tried to correct the inlet pressure on that graph but the 20C matches Dougal's 4bd1 PR vs flow graph, so that doesn't need correcting...right?

I found the conversion between m^3/s and lb/min and I'm confident (never 100%) I got that right when overlaying the graphs. However I tried to do the same with the IC graph and failed. The scales were all wrong or something. I will try again and post up results once I think it's correct.

I have plenty of motivation to fix these graphs now. I ordered one.

Kinugawa Turbocharger TD04HL-19T / T25 Flange / 6cm Oil-Cooled.

I did some google searching and learnt a few things:

1. The brand has mostly excellent reviews. As good as you would expect from random Internet reviews/forums.
2. It's possible they might be rebranded Kamak's? KAMAK DYNAMICS - Distributors - Asia
3. Kinugawa have Australian bank details if you prefer this to an ebay purchase...
4. You guys post on a lot of forums. Not sure if I'm the first on here to order a Kinugawa, but there looks to be a lot of recent purchases on 4btswaps for trials as well. Can't wait to see how it goes!

That looks about right. I do have that same turbo plotted out on that map on my worksheets.

Awesome news Judo. Would be good to have a 4bd1t convention one day and see how the different setups go IRL.

Following with great intrest. I was about to order one as well, but plans have been put back a few months to do repairs and brake upgrade after the CSR.
Keep the updates coming.

Originally Posted by flagg

Awesome news Judo. Would be good to have a 4bd1t convention one day and see how the different setups go IRL.

Definitely, we'll have to organise an event northern VIC / southern NSW.....once I get some number plates that is.