GTR T28 and CA18DET fitting

Discuss topics related to the CA18DE and CA18DET series engines.
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flohtingPoint
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I did a search and could not find any results. I was wondering if anyone has tried to put one of the GTR T28 turbos on a CA18 yet and how the fitting went. Is there anything special that would need to be done and what type of extention would need to come off the T28. I know of folks who have done them on SR's but never a CA. Reason being, is I have someone that is willing to part with one of them and I have a turbo issue with my current T25 getting shaft play.


cadet
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I'm the one selling one, and I know that they can fit an sr20 with the stock downpipe because I bought one of my 02 housings from a guy in virginia whose sr20 front clip was shipped with a GTR turbo, that exact 02 housing, and a greddy sr downpipe. So I'm thinking an sr downpipe should be all is needed to make it work. As for clocking, I'm unsure, I haven't seen the turbos side by side. Oil outlets won't be a problem because I am including the turbo toy billet ones, but does anyone know about the inlet? it appears to be a flare fitting on the GTR inlet.

NeedCAforS13
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ickkkkk.... gtr turbos are pretty crappy by themselves. I would get an SR t25g 100x before buying a gtr "t28". And there a pain to fit properly from what I've heard. Different outlet on the compressor too, so if for some reason you do decide to use it, make sure you get the compressor outlet (to the hotpipe). If you can grab the lines it might be easier as well.

Sean

cadet
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they have about the same turbine as the ca18det but a larger compressor, if memory serves correctly. Not much of an upgrade, but a suitable replacement.

NeedCAforS13
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cadet wrote:they have about the same turbine as the ca18det but a larger compressor, if memory serves correctly. Not much of an upgrade, but a suitable replacement.
A GT-R T28 has a crappy 0.48 A/R on the turbine compared to a 0.64 on an S14/S15 T28 turbine. That's why the GT-R T28 is rated 15-20 LESS max HP than even a stock S13 T25g. Also, Skyline turbos didn't go ball bearing until the BNR34 so its not even a BB turbo! Another thing to consider is that the skyline turbos use ceramic turbine wheels, which don't like higher boost much (don't try pushing a ceramic turbo to 14 psi).

You might improve the spoolup response (not really very much), but I'd still consider it a downgrade from an SR20 T25g. (still better than a CA18 T25 though I suppose, but you can get a good condition SR t25g for under $200).

As for the flanges, the turbine inlet flange is still standard T2 flange same as stock T25. Outlet flanges would be different so figure that into your total cost analysis

Sean

cadet
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the flanges are all the same except for the turbine outlet, and I'm including the dump pipe and an hks gasket so thats moot.Anyway I never said it was an improvement, I'm not gonna act like one of the guys on ebay that says you will make 600 hp on this turbo. But I'm not asking too much money for them, they are in good shape, and they are equal to or better than what is on a stock ca (especially if yours is blown).the stock GTR turbos should support up to 14.7 psi without much trouble, beyond 15 psi they start to disintegrate. Anyway forgive me if I'm too strongly advocating for them (as I'm selling them) but I'm just trying to set some of the facts straight.

NeedCAforS13
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cadet wrote:the flanges are all the same except for the turbine outlet, and I'm including the dump pipe and an hks gasket so thats moot.
this isn't the same as the CA turbo (compressor outlet, the 2 bolt flange) stock CA is a 3 bolt flange (as is stock SR)... where is he going to find something to bolt on here?

and he'll need something to bolt on here as well seeing that the CA uses a slip fit intake pipe...granted he's gonna need one of these if he uses any SR turbo too.

and I'm not sure if these oil lines can come off and you can use your old ones, but this doesn't look like it'll work either.

and unless you're selling them for under $100, I would stear clear. I know you're trying to push your stuff for sale, but its not exactly a bolt on deal, and its kind of a crappy turbo. My advice, don't get it. It's not worth the trouble of trying to fit it, especially since there are other turbos that bolt right on!

BTW, Here's one for $50 if you're set on buying one.http://cgi.ebay.com/ebaymotors...&rd=1

Sean

cadet
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mine doesn't look like that and I have inlet and outlet for the compressor (2.5 and 2.25)I didn't know that the ca18det did not use the nissan 2 bolt compressor elbows. keep in mind I still don't have my ca yet.

NeedCAforS13
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cadet wrote:I have inlet and outlet for the compressor (2.5 and 2.25)
I suppose this helps the deal a good bit then if the compressor inlet and outlet are included it should be pretty easy to install it. Still not a great turbo, but having that stuff makes it easier. What do the oil line connections look like?

How much are you asking for them just out of curiosity?

Sean

cadet
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I am asking 175 each for them, they have 28,000 km on them (from the shop that sold me them anyway, supposedly taken from a low mileage R32 GTR to upgrade to garrett GT's).The inlets I made myself, the outlets are ford turbo coupe (but they work). The extensions (turbine outlets) I have 3 of, two off R32's and one off an R33 GTR (so that I have 2 of the same kind, because the 2 off the same car are substantially different). The oil inlets are bpt I believe, look like a flare fitting. I think the stock GTR uses hard line with a flare fitting there but I'm not sure. The outlets are standard T25 fare, so whatever works on just about any T25 (sr20 included) will work there, but if he gets it from me he decided to get one of my "tuner toys billet return flanges" that I was going to use to run stainless lines.

NeedCAforS13
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Thats not a bad price for a turbo with only 28k kms on it... ehh, I suppose if you're looking for a stock replacement you might be well off getting these

Sean


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