I made a strange discovery yesterday while pulling two spare ct-26 turbos out to look at them...

1st difference:
The stamping inside the housing. 1st turbo has the number "2" stamped in it, the second turbo has the number "4". (From here on out, the number 2 turbo is always on the left.)
"What are the difference in housing other than the housing to w/g nipple?"[/I



2nd difference:
The nipple that leaves the housing and goes to the wg is in two different places, albeit, very close to each other. (I placed a small bolt where the nipple would normally be found in the first pic below.)
[I]"I wonder, which one is better if there's a difference?"
(See pics below)

3rd difference (and most notable):
The intake (compressor) wheels are completely different. One is the 5fin design (with large gaps between 1st and secondary fins) and the other is an 8fin design with very little space between 1st and secondary fins.
"Of course this last difference really needs digging into."




There are a few other minute differences. For example, there is a slight difference in size between the oil inlets and outlets, slight variations in w/g arm design, different wheel fastening nuts, and very small cosmetic difference on the exhaust housings. I have pics of these, as well, if need be.

Now, I know there are actually quite a few ct-26 housings and wheels. But both of these supposedly came off 100% stock 7m's. One an 89 and one a 90 that I owned. I'm not sure anymore which one came from which. Though, I think the 5fin (with the "2" stamp) is from my early '89. Are both these turbos truly stock? Is one a rebuilt ct-26 hybrids, different versions, what? I don't know. Maybe one of them has the ceramic wheels? I don't know yet. I've tried digging for info like crazy and have come up empty-handed. There doesn't appear to be any porting and the compressor wheels both appear to be the same diameter or at least the viewable portion.

And info would be great!

Never seen a stock CT-26 with a compressor wheel like the one on the right before. Not from a MKIII, although I've never seen a CT-26 from a MKIII newer than '89. Could've been an update.

By the way, if it's upgraded the inner diameter of the compressor wheel could be different (larger), you could pull the housing off each and see what else is different.

Oh and looking at a CT-26 I have sitting here I noticed something I don't recall ever seeing on a CT-26. On the compressor housing there's a number written on it. It looks like someone scratched a number into the mold as it looks scratched into the housing, but the numbers are raised. The numbers are 035... is this common?

here is my 92 ct26
http://navy770.tripod.com/SUPRA/index.album/92-ct26?i=2&s=1

stock ct, upgrade ct60-1, sp61gt.
http://navy770.tripod.com/SUPRA/index.album/img_0143?i=0&s=1

quote:

Originally posted by CRE:
Oh and looking at a CT-26 I have sitting here I noticed something I don't recall ever seeing on a CT-26. On the compressor housing there's a number written on it. It looks like someone scratched a number into the mold as it looks scratched into the housing, but the numbers are raised. The numbers are 035... is this common?

Yes, both my turbos have it and I'm sure the one currently on the car has the numbers etched in, too. Not sure what those etched numbers mean.

I've decided the numbers were carved into the mold by some angsty little Japanese fabricator as his only way of pretty much peeing his name in the proverbial snow...


There, so now you know.