Check out the GT2871 48trim. The T28 may be a little slow in a traditional set-up, but in my compound setup I hit 15 psi out of the inlet turbo by ~3250 RPM (3rd Gear). This is a <$200 JB Churbo.

The TD04L-13t plot looks a lot like my virtualdyno log but on the 1.8 better spool and higher whp. But i recognize the same things, fast spool and high midrange torque but after 6000rpm it tapers down.

Good job!

A t3 50 trim has these specs, or at least my specific chinacharger clone...
Comp 43.20 / 60.41 - Turbine 45.74 / 62.86 .48AR turbine housing

If you do the math, it ends up being around 48 trim on the compressor.

You can't buy a 50 trim t3 from garrett, it's an OEM turbo off some thunderbirds and like two years of volvos, oh and a metric fuckshitton of diesel power plants over in europe. That's why they are all over ebay for cheep.

Throwing a curve ball, EFR 5951. Whenever BW releases information on it.

Guessing that GT2871 will spool just a tad slower then a potato, which I have done a calculation on in my old thread. https://www.miataturbo.net/diy-turbo...4/#post1376987

Thats a nice thing to hear, thanks for confirmation!

Looks very close to Brain's T3. Although not totally the same. Want me to add this to the list?

Yess! Just saw this on the interwebs, looking forward to this one. 95% of the capacity of the 6258 but 30% less rotational inertia :D Definitely adding this to my list once there is more data available.

Regards

Does the data consider EBC or waste gate?

That is Brian's T3, at least the ebay 50 trim he ran.

That's a pretty stupid question. Yes, getting anywhere near this data requires something other than just wastegate 99% of the time.

Want me to add the 50 trim T3 to the list sooner or later?

And yes these graphs pretty much use ALLOFIT when it comes to spool/wastegating.

That's a pretty stupid question. Yes, getting anywhere near this data requires something other than just wastegate 99% of the time.[/QUOTE]

It's not a stupid question at all. Consider all this information and not once is it mentioned. For future readers and especially noob sake it needs to be said.

I'm talking about some t3/t4 thing:

turbine 60mm/49mm
.48 a/r

compressor 48.50mm/64mm
.60 a/r


I think it's a turbonetics wheel. no clue really. I found it one day, and thought it might make an nice alternative to the china 50 trim t3 if someone wanted a little better top-end performance for under $200.



otherwise, when i look it up, i only find 76mm compressor wheels, which I assume this map relates to:

http://www.motorgeek.com/portal/bloc...57&map=t04e-50

It's not a stupid question at all. Consider all this information and not once is it mentioned. For future readers and especially noob sake it needs to be said.[/QUOTE]

This data is based off compressor maps. So assuming you are using the turbo to its full efficiency. Its not real world data.

As mentioned in the first post: '' Please remember these are all calculations, this is not real world tested and there is no real confirmation that these numbers are 100% right. Please do not buy any parts based off these calculations alone but do more research first. These calculations are based on a 89-93 Mazda Miata with the stock 115HP 1.6L engine. In these calculations I have inserted corrections for a stock head, intake manifold and throttle body. When changing these things (head port/custom IM/bigger TB) these calculations are not correct. This can affect it by a pretty big margin in some areas. I am also not responsible for any damage done if following these graphs. ''

As said above, these are all calculations, with both theoretical data (compressor maps etc) and hard data (dynos and 4th gear spool data etc). I am showing you the best possible situation that is theoretically possible. I am not talking specific setups or anything. Just the stock 1.6L and a said turbocharger.

I am also not here to spoon-feed the noobs. If they don't know how to get these power goals then they should visit other threads first.

Will look into this, thanks Brain.

Full capability* :bigtu:

Both theoretical data (compressor maps etc) and hard data (dynos and 4th gear spool data etc). Mixing in the real word data makes the graphs a bit more precise.

Regards

Coming back to this from a few years in the future, I have data from my 1.6 with TD04L-13t and a street tune of dubious quality and a virtual dyno run.

https://www.miataturbo.net/attachmen...1&d=1599519978