Turbo talk - what, which and where to go when they die

[rider]

The turbos for the Supra seem to be a confused discussion area of CT12's or CT20's or were the 20's just on Aristo's. I have a spare set of turbos that I haven't got around to either selling on or having reconditioned ready for when the ones on my car die, but I probably should. 

Turbo rebuilds haven't been discussed on this site for years. That must mean that your turbo's either failed after 15 years or so or they go on forever? Probably unlikely but my originals have done 25 years, spooled over 110,000 miles aided by a Blitz throat clearing dump valve and are working well. So maybe they will go on forever with their regular oil change service history over 25 years and now, due to limited road use,  the oil gets changed every 500 miles or so.

With my spare set sat in the garage, how can I tell if they are Supra Turbos and I haven't been passed off with a set of Aristo blowers instead? I have read that the Aristo turbos are larger, truck type, turbo's than those that were fitted to the Supra which are a smaller faster spooling design. I don't want to get my spare set rebuilt and then if I do come to have to use them, find that they aren't actually Supra turbos. 

Who do people go to these days for rebuild work. I had Doug Sport of Stourbridge recommended to me by fuzzly (of Car SOS and drum banging fame) but it seems most here over the years have used CR Turbos? 

How many of us are still running with the original turbos on 100k+ miles hoping they last forever?

Edited July 9, 2021 by rider (see edit history)

[JordanC]

Hadn't really given much thought to it, always assumed I'd just send mine off to get rebuilt somewhere if they went pop, currently on 112k miles with the stock j specs

[m12aak]

That's a fair point. My turbos are currently on 76k and show no signs of failure yet, and at stock power, I doubt they will with regular servicing. I do want to buy a spare set and have them rebuilt with metal turbine wheels, just for peace of mind, and so I can go through and replace all the VSV's and hoses at the same time – but that's only preventative. 

I believe the JDM Supra and Aristo turbos are both CT20's, but there are distinct differences so they're not a straight swap, where you'll need to use some of the Supra bits if they're Aristo items that you have. I've done a quick google and this thread mentions the wastegate actuator is different so that may be something you can use to confirm which ones you have?

I remember speaking to Keron about turbo rebuilds and I'm pretty sure he mentioned Midland Turbo, but I'd get in touch with him to confirm.

[jim_supra]

I've got a couple of sets of turbo's lying around in the garage, one set from a non-VVTi J-Spec Supra and one set from a VVTi Aristo, if I get chance this weekend I'll dig them out and see what differences I can see between the two.

[m12aak]

2 minutes ago, jim_supra said:

I've got a couple of sets of turbo's lying around in the garage, one set from a non-VVTi J-Spec Supra and one set from a VVTi Aristo, if I get chance this weekend I'll dig them out and see what differences I can see between the two.

That'd be great, it'd definitely be useful to have a confirmed list of differences and photos to refer back to 

[Swampy442]

I dont know where you got you info from re Aristo turbos, or indeed truck type but theyre exactly the same as Supra ones, even share the same part number. The Supra and Aristo engines are basically the same.