Garrett GT2056 turbo

[vanagonturbo]

Yeah, I saw that as well. at some point during my searching, I seem to recall it was a 2052. Not sure which version though..

[RabbitJockey]

yeah i could find people discussing a 2052, but they were never specific on which one, and whether or not that was the on that came in the kit

[vanagonturbo]

I bet its the 2052-3

[vanagonturbo]

Alcaid, do you have an opinion on the 2052-3?

[vanagonturbo]

A little more poking around on squirrelperf and I got this:



This is with inputs of 70% efficiency across the board, max hp 200, sea level, max rpm 6k, 1.6l, target AF 19, bsfc .35, max boost at 3800 and min boost at 3000. Does anyone see anything wrong with my numbers?

[vanagonturbo]

For reference, here is the same criteria plotted with the 2056.



This seems congruent with my findings. Feel free to add any corrections..

[RadoTD]

The only number that seems funky to me there is the min boost at 3000rpm... you should be well spooled by then. It probably doesn't make much of a difference, I think it just means you'll be further into surging territory at moderate rpm levels

With the K14 map, however, it hasn't plotted everything because you're WAY above the map's pressure ratio. The top of the K14 map is about 2.6, but with the numbers you gave returned a pressure ratio of about 3.2, or 32psi. Too much for a K14. The annoying thing is that the flow (~.15m^3/s) is just about right.

[Alcaid]

Alcaid, do you have an opinion on the 2052-3?

20lb/min of air is too wimpy

[vanagonturbo]

The only number that seems funky to me there is the min boost at 3000rpm... you should be well spooled by then. It probably doesn't make much of a difference, I think it just means you'll be further into surging territory at moderate rpm levels

With the K14 map, however, it hasn't plotted everything because you're WAY above the map's pressure ratio. The top of the K14 map is about 2.6, but with the numbers you gave returned a pressure ratio of about 3.2, or 32psi. Too much for a K14. The annoying thing is that the flow (~.15m^3/s) is just about right.

gotcha! thanks for pointing that out. Stupid me wasnt actually looking at the PR numbers, just the graph..

[vanagonturbo]

Alcaid, do you have an opinion on the 2052-3?

20lb/min of air is too wimpy

Agreed! Is this the part where we come to the conclusion that the efficiency of the motor does not allow for 35+psi on one turbo without going into surge, getting out of the efficiency range of the turbo, or going over the choke line?

One would think it would be possible... but its not looking so optimistic at this point.

[RabbitJockey]

i've read over this a few times its 6 years old, passenger performance went on to build the 190whp car that surged like a ***, but they basically conclude the same things, these engines are too small, to flow alot of air that way, have too small and not enough valves to flow alot of air that way, and don't rev high enough to flow a lot of air that way, we're stuck in a little box.  its almost like u need an aaz and to rev the *** out of it in order to make any real power.  or just compound turbos...

[vanagonturbo]

Ok, well I guess for now, I will put an MBC on the 2056 and work on a compound setup.. I have not really been capable of WOT pulls as the 2056 spools pretty quickly and I have to let off the throttle when I see it nearing 20psi. I have read that thread many times. One thing that I keep finding in this forum are threads that start off with fantastic builds and big numbers, but one click to the last page always results in engine failure of one sort or another...

[Powered by Spearco]

Hey, I've got no failures yet or to speak of.  . That might change at the dyno on Saturday though.

[vanagonturbo]

I've been watching your thread. fingers crossed for no bad things you are using N20 though, so....

[Powered by Spearco]

Well, once at the dyno. Hopefully, if they have time, being that there is over twenty trucks participating, they will let me run the first with just the pump to get a baseline pull, then use the N02 with an .024 jet and the third pull let me change it out for the .042 jet.