RST4ever

As the title says, are there any direct bolt.on options to replace the Fiesta RS Garret T2?

I don't want to do a T3 conversion, but would like to know what other options are out there, as the T2 are nowadays hard to source if you have cracked housings.

Thanks for any help

stevieturbo

I think they were a T25 ?

On that basis, there should be dozens of potential options, but would likely require some fabrication in terms of pipes and downpipe etc.

If you search for T25, GT28 etc, you should come up with lots of results. Size for your power goals etc, but something more modern should spool better than the old Garrett stuff, and perform better or the same up top

RST4ever

Thanks Stevie

I have seen different names for it, T2 T02 and T025, gets a bit confusing. I wanted to avoid fabrication as much as possible, first because I want to keep the car original looking and second because MOT where I live is the closest thing to hell this side of a bad divorce, and the smallest modification they find will mean not passing. The main issue finding a suitable turbo replacement is that unless you can have them in your hands to compare and measure, you are basically buying blind,which is not a good idea on such expensive items. I'm not really looking for big power, just a better running car that is reliable and makes you smile when you give it the beans. 150 HP would be more than enough for me, as I want to keep the original wheels, and the car is already dangerous enough as it is now

stevieturbo

This gives you the dimensions of the turbine inlet flange, which is where the T2, T3 etc comes from

https://www.sincocustoms.com/identifing-turbo-flanges/

You could probably contact a turbo specialist, and they could..might be able to fit a new core to your existing housings, that would be more modern and better than the old unit.
They'd be more familiar with what might interchange, or what turbine wheels etc might fit into your existing turbine housing

RST4ever

Funnily enough the inlet flange seems to be triangular shaped on the FRST?

stevieturbo

Manufacturers often do silly things to make it awkward from more generic items.
But the core turbine wheel will still be the same T2/T25/T28 family

So if you bought a suitable turbo core, it should fit into your turbine housing.

Or as said, just buy a complete unit/hybrid/whatever from a reputable turbo company. Many options.

RST4ever

The core was never the issue, the main problem is the stupid specific inlet and outlet from the Ford headers (triangular shaped) and outlet (5 bolts but not a standard Garrett) to the adapter routing it all to the normal circular Ford downpipe.

Here is a good read about the available combos from Garrett, however none matches the Fiesta RS inlet/outlet flanges, hence fabrication is needed.

https://www.garrettmotion.com/news/n...t-performance/

stevieturbo

No big deal, just make whatever fit.

RST4ever

I'm thinking, theoretically you could get a generic T25 turbine housing and mate it to the Fiesta T2 cool side and center. Using an ERST header with a T2 adapter and then routing the exit again to the standard Fiesta exhaust with another adapter. The only thing to take care of would be that the turbine wheel in the Fiesta matches well the T25 housing width. Or, maybe replace the turbine wheel if needed with the correct sized one.

RST4ever

So I got confirmation from a reputable source that the FRST Garrett T2 is a specific one of a kind unit both in the inlet and outlet flange, and nothing else will fit there. Replacing it with anything else equivalent in size/performance to keep a "standardish" output and install will require modifying the header outlet and mid section flanges to whatever you put in there. For the header, easiest option is to get an Escort RS Turbo one and add a T3 to T2 adapter, as the ERST flange is a standard T3 one.

I will now try to have an idea of what modern thing can be equivalent in size and performance to the original T2, be it Garret, Holset or whatever, and has the inlets/outlets at the same side, to avoid having to do extra piping to/from filter and intercooler.

Any suggestions/feedback is welcomed.

For the record, standard Garret T2 compressor A/R is 48, Turbine A/R is 47 (Stamped on the casting). I have no data about the wheels.

stevieturbo

Again, what are you trying to achieve here, or what do you need ?

The turbo will not be unique, even if the turbine housing is bespoke.

eg, a quick google for fiesta rs turbo hybrid brings up this, which is undoubtedly just a generic core replacement.

https://www.turborebuild.co.uk/enhan...tridge-stage-1

or this ( same seller )

https://www.ebay.co.uk/itm/322378593255

or this

https://www.burtonpower.com/hybrid-t...urbotsf13.html

There will always be options.

Or just adapt a T3 or T25 flange to your manifold which should be pretty easy

RST4ever

What I am trying to achieve is:

1) See if there is any bolt-on alternative if you have a cracked turbine housing. It's confirmed that there isn't now. Anything you want to put there which is not original, will need adapting.
2) Given that adaptation of a different unit (Housing or full turbo) is the only option, what is the least labor/adaptation/surgery intensive option.

I am aware of the many equivalent o improved T2 CHRAs available around, but again I'm talking here about the frequent cracked turbine housing problem. My own turbine housing is so far OK, with the usual minor hairline cracks, but should it die completely or would I wish to bolt in something that provides more power reliably and with available spares, I want to know what options are out there that require less hassle. That is my goal right now.

stevieturbo

Unless the crack is absolutely massive....it will unlikely ever be a real problem in any of our lifetimes.

And again, not exactly difficult to adapt a new flange onto the manifold etc