CT20b for Rebuild

Re: (Admin)

Sun, 28 Jan 2018 10:41:39 GMT

I run a modified ct26 in my race car. It delivers good results. I'm going to put it into my ST205.

Re: CT20b for Rebuild (Guest)

Wed, 17 Jan 2018 23:56:00 GMT

Please update me if things have changed, cause this is about community knowledge sharing,

CT2x housings sell for around $200 or more.

GCG as well as many other turbo shops will upgrade the ct2x core and bore out the housing for anywhere between $700-$1500+
$700 mark is a journal bearing inducer side only - $1500 ball bearing wheel / exducer side mods. Spent $1,700.

Or... You can try buying an eBay core $200-$700. Arrives with a damaged wheel because of international freight. The seller only will replace if you return registered post, but the cost is as much as the item and they will only send in the same packaging to arrive damaged again (or they are cheaply made). Wasted money. Spent too much nothing to show.

Or... Turbo suppliers like Falcon Creations (from twisted motion) sell an upgraded ct2x series with upgraded 16g wheel for about $800 or less delivered. Spent $800

None of the above mods will perform like the actual gtx3071r referred to. Ct2x housing has an ar of .3x-.4x compare to .6x housing of a gt3071r, not to mention other aspects.

Upgrade the ct2x turbo has always been a goal, to show my age, I have had back in the day the original t04e upgrade by GCG (in Sydney, if we are referring to the same shop). Journal bearings don't last, try a rebuild but not within spec/doesn't last.

I have recently thrown away two ct2x housings, given one away to a forum member. Over time wasted a lot of money to learn about turbos. I still have a ceramic coated, ported, ct2x housing sitting on the shelf to remind me never try re-coring a ct2x ~ causse it's not cost effective to get a core/modidpfy vs outcomes/products in comparison, unless someone knows something more...

Re: CT20b for Rebuild (dasic1)

Wed, 17 Jan 2018 22:39:52 GMT

Seams like it is a CT20

Re: CT20b for Rebuild (MCT_MR2)

Wed, 17 Jan 2018 20:45:08 GMT

Call gcg mate. They have offered the service for over 5 years.

Re: CT20b for Rebuild (Guest)

Wed, 17 Jan 2018 07:25:12 GMT

My comment is my opinion of based on my knowledge of cost vs outcome. If you want to share details of recommended purchase price of a ct20 donor, your supplier of gtx3071r cores (ball-bearing or journal copies) and costs, including machining the core, that might help everyone gain the "best and cheapest ways to get a good turbo on an sw20"

Re: CT20b for Rebuild (MCT_MR2)

Tue, 16 Jan 2018 22:27:14 GMT

Tony, very helpful information. I think you missed the bit where internals will be discarded. Ct20b's are good donor housings for full gtx3071r cores and wheels, without having to run rubbish flange adapters. A bit of porting for the wastgate entry and opening up of the wastegate ports is required, but it is one of the best and cheapest ways to get a good turbo on an sw20.

Re: CT20b for Rebuild (Guest)

Tue, 16 Jan 2018 21:37:09 GMT

How to know what it is ct26 or ct20 etc, Exhaust housing has the model code stamped on it, 740XX the XX tells you what turbo it is.

74010 for single entry ST165 All-trac
74020 for twin entry Ceramic CT26
74030 for twin entry Inconel CT26
74040 for twin entry Ceramic CT20B
74080 for twin entry the steel shaft CT20B from the ST205 WRC
42010 for singe entry Supra CT26

All 90s junk not worth the time of touching IMO.

Re: CT20b for Rebuild (stuka)

Tue, 16 Jan 2018 21:25:16 GMT

ok thanks

Re: CT20b for Rebuild (dasic1)

Tue, 16 Jan 2018 20:12:16 GMT

Ok I’ll go check but pretty sure it’s it

Re: CT20b for Rebuild (stuka)

Tue, 16 Jan 2018 20:04:53 GMT

The comp housing has toyota written on it (as opposed to toyota ct26) and the dump pipe side flange has 7 holes rather than 6 on the ct26

Re: CT20b for Rebuild (dasic1)

Tue, 16 Jan 2018 20:01:43 GMT

How do you tell the difference between them, I can’t remember been to long since I’ve played with them.
I have a turbo on a spare gen3 that’s got a pit of shaft play

CT20b for Rebuild (stuka)

Tue, 16 Jan 2018 07:34:20 GMT

Im looking for a rooted CT20b for rebuild, condition doesnt matter. Internals will be discarded so if its missing a wheel or anything it doesnt matter. Anyone got one?