New turbo option

[joeshmoe44883]

As many of you know, several years back I discovered garrett made a good, modern replacement turbo for the c223's, the gt1548. They discontinued it, leaving a void of a good replacement.
A month ago, garrett released a new line of turbos, their gbc line. I was the first to order them, among them is a 14 frame size (factory is 15) that checks almost all the boxes for a good replacement. ONLY downside is that it is not t25 flanged. Other than that it should be perfect and should out perform even the gt1548.
Factory turbo has a .63 a/r turbine housing, which is the main reason it spooled up slow. New one has a .45 housing and a slightly smaller turbine wheel, coupled with the full bladed wheel will mean a nice and early spool.
I'm working on a way to bolt it up to the factory manifold, it's going on the 3rd gen engine im building, so I will have results, and video, soon.

Oh yeah, and it's priced at $689, which is not bad for a brand new turbo. Rebuilds are usually 500-ish.

[JoeIsuzu]

If I ever get around to having my C223-T rebuilt, this would be SWEET! I agree, the original spooled up way too slowly. I suspect that contributed to the high rate of rod failures, too.

Jack

[joeshmoe44883]

Jack,

It's unfortunate it isn't an exact drop in like the 1548 was, the downpipe elbow won't fit, and I believe the turbo inlet is a 1/4" bigger.

The next turbo up,the gbc17, will drop right in 100%. It would probably be similar in performance to the factory gt15, but I wanted something better. Here's some pics of the 14 and 17 next to each other.

[acer]

Hello,have you been able to mount the 14 turbo to the c223t manifold yet? I might try to make or find the adaptors someday soon.

[joeshmoe44883]

I haven't yet, been trying to find main bearings, which I just bought some from Jerry.

I'm thinking instead of adapting a turbo manifold, I'll either build a new one or adapt the na manifold. Going to try the na manifold route first, it's been done before by others.

Once bearings get here, the rebuild will be quick, I'll have turbo pics up by next weekend or so.

[joeshmoe44883]

Rebuilding a customer's c223t turbo, or rather, replacing it with a new center section because it blew up into a few pieces.

We went over several options, a few being new replacements like I originally posted here. I decided to do some digging to see what we could do with the stock turbo.

I knew the 1986 Renault 2.1L turbo diesel used an almost identical turbo, I did some digging in turbomaster catalogs to see what I could find.

The Renault 2.1L used a Garrett tb0203 turbo with a .35 a/r turbine housing.
The Isuzu c223t uses a tb0209 turbo with a .63a/r housing. The bigger the number, the bigger the housing and the laggier the spool.
The reason the gt1548 spooled as good as it did was because it had a .35a/r housing.
With this info I tracked down a .35 housing and purchased it from the uk. It arrived today and I checked it with the c223 turbo, it's a perfect fit.

Finally the laggy factory turbo will be fixed, it should be a much quicker reacting turbo and will remain 100% bolt in. Unlike the gt14 turbo that I'll be using.

[JoeIsuzu]

Sounds like a great option!

Jack

[joeshmoe44883]

Here is the link, when I have more time I'll post the housings part number as well as turbo models it comes on from factory. It will definitely be a good bang for the buck mod, and help breathe some life back into the engine.

https://www.ebay.com/itm/323973734447?h ... SwhY1dxZRI

[JoeIsuzu]

I've only driven one factory turbo diesel, and that was a brand new P'up that I test-drove in 1986. My one complaint was the lag, which I thought pretty much neutralized any benefit of the turbo in around town driving.

Jack

[Halden]

I've only driven one factory turbo diesel, and that was a brand new P'up that I test-drove in 1986. My one complaint was the lag, which I thought pretty much neutralized any benefit of the turbo in around town driving.

Jack

Just keep your engine speed above 2200 and shift at redline