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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-05-2012, 12:00 PM   #21
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Quote:
Originally Posted by blaen99 View Post
Old post, bumping for one reason, to give my 2c on the cxracing turbos:

The CXracing turbos are terrible. Ended up getting my hands on one, it hasn't even reached full boost (14-15psi) by 5000rpm. And yet, it's supposedly between a 2554 and 2560.

My old T25G was way, way better.
oh that's crazy. did you measure stuff before you put it in? i know Levnubhin got a turbo once he though was a 2860 size and ended up being like a 2876.

I made sure the turbo i got had all the wheel size specs so i knew what I'd be getting my hands on. I confirmed the measurements once i got it.
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Old 05-05-2012, 12:06 PM   #22
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oh that's crazy. did you measure stuff before you put it in? i know Levnubhin got a turbo once he though was a 2860 size and ended up being like a 2876.

I made sure the turbo i got had all the wheel size specs so i knew what I'd be getting my hands on. I confirmed the measurements once i got it.
The comp wheel is smaller than a 2560, I compared a 2560 wheel to the CXracing wheel, didn't measure - cxracing was "taller" than the genuine 2560, but the 2560 was "wider" than the cxracing. It's the same turbo as has been discussed in this thread, however.

It's ***** awful spool-wise though, I've only reached 10psi by ~4500ish rpm. TERRIBLE turbos. It spools like it's a 30xx turbo, not a 25xx - and yet, it only has the power of a 25xx turbo.

Last edited by blaen99; 05-05-2012 at 12:47 PM.
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Old 05-05-2012, 12:59 PM   #23
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I never installed this. It had a weird downpipe flange. I think a t3 but not sure, 5 bolts but not t25. Anyway if anyone wants to buy it let me know. It has a bigger compresion wheel than the t25 for sure and the wasted gate seems well designed but other than that I dont know
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Old 05-05-2012, 01:12 PM   #24
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Quote:
Originally Posted by blaen99 View Post
The comp wheel is smaller than a 2560, I compared a 2560 wheel to the CXracing wheel, didn't measure - cxracing was "taller" than the genuine 2560, but the 2560 was "wider" than the cxracing. It's the same turbo as has been discussed in this thread, however.

It's ***** awful spool-wise though, I've only reached 10psi by ~4500ish rpm. TERRIBLE turbos. It spools like it's a 30xx turbo, not a 25xx - and yet, it only has the power of a 25xx turbo.
While I'm on this....

It's removing fuel from the T25G-cells in autotune/running richer. This means it is producing less power on the same cells, correct Brainy?
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Old 05-05-2012, 01:33 PM   #25
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yep.
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Old 05-05-2012, 01:35 PM   #26
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Well, ---- me. So it's a power-downgrade in the same cells, and it takes for ------- ever to spool up then.
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Old 05-05-2012, 01:43 PM   #27
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what about top end? did you have to add fuel?

which one specifically did you get?
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Old 05-05-2012, 01:45 PM   #28
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The item in the OP, http://www.ebay.com/itm/New-Design-T...item3f0441846f

As for the top end, it's removing fuel from the top-end as well, but the top-end is way higher psi than the T25G ever ran, so it was still running your basemap.

I'm just going to pick up a 2560 in the future and go full ArTech, it's not worth this headache imo.
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Old 05-05-2012, 02:21 PM   #29
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What did u have before? .86 a/r turbine is why its slow. Can not swap turbine housing if same?
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Old 05-05-2012, 02:24 PM   #30
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Turbine Housing isn't possible to swap.

I'd have to get ahold of a turbine -and- turbine housing from a standard T25 or something in order for it to even have a chance of working sadly. The turbine has little to do with any T25 turbine.
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Old 05-05-2012, 03:24 PM   #31
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Huh, sounds like a dodged a bullet. I ended up loosing $40 on this thing with shippIng charges, and Abe wasnt impressed with it's build quality. The flange it came with looked down right shitty.

And now I have a turbo thats at least at 5psi well under 3000 rpm see my build thread for what you're missing.
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Old 05-05-2012, 03:25 PM   #32
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Cuurrllly...Yeah, I'm just going 2560 later. This'll work for now.
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Old 05-05-2012, 03:57 PM   #33
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I was wrong, full boost by 2700rpm, 5ish psi as low as 2380rpm. Found a old Greddy log and I was hitting the same 150 map pressure by 3000, so I gained 300. This is a much better downpipe and wastegate setup.
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Old 05-05-2012, 04:06 PM   #34
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Wow, and that's journal bearing?

(Edit) You sonofabitch, that's a T25G you are running?

Yeah, I'll just go 2560.
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Old 05-05-2012, 04:21 PM   #35
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Fawk you Curly.

E-mail sent to Abe. 2560 and ArTech downpipe/exhaust incoming in the next few months.

You talked me into spending more money I didn't want to spend on the Miata Cuuurrrrlyyyyyyyyyy!
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Old 05-05-2012, 04:25 PM   #36
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Eh? It's an SR20 T25, whatever that means.

Edit: Lol. The power of MLV.
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Old 05-05-2012, 04:26 PM   #37
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Yeah, got rid of my previous T25G Curly thinking this Chinacharger was an upgrade. It wasn't.
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Old 05-05-2012, 04:40 PM   #38
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How about the Shanghai ones Begi uses? It seems not all chinachargers are built the same?
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Old 05-05-2012, 04:41 PM   #39
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This chinacharger is turbo #3 for me. I'm just buying OEM new garrett, some people have luck with these used turbos and chinachargers, I'm not one of them.
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Old 05-05-2012, 04:57 PM   #40
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A Chinacharger performing more poorly than originally expected? Color me unsurprised.
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