Chinacharger GT2870 vs Garrett GT2554 with Dynochart - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 12-15-2010, 12:42 PM   #21
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If it is wheel design that makes the difference.....Maybe the next person should by a chhurbo from the same manufacturer as Brain.

Brain: Where did you buy yours? Mine is an emotor usa, same as levnubin. Maybe some churbo manufacturers do a little more R&D when ripping off an design.
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Old 12-15-2010, 12:46 PM   #22
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Quote:
Originally Posted by djp0623 View Post
If it is wheel design that makes the difference.....Maybe the next person should by a chhurbo from the same manufacturer as Brain.

Brain: Where did you buy yours? Mine is an emotor usa, same as levnubin. Maybe some churbo manufacturers do a little more R&D when ripping off an design.
I highly doubt ebay brand chinacharger companies do any r/d as that would cost money and ultimately drive the prices up close to the authentic stuff.
Which defeats the whole purpose of a chinacharger.
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Old 12-15-2010, 12:49 PM   #23
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Quote:
Originally Posted by 18psi View Post
I highly doubt ebay brand chinacharger companies do any r/d as that would cost money and ultimately drive the prices up close to the authentic stuff.
Which defeats the whole purpose of a chinacharger.
Yup, you are right. Having said that, the guy whom i bought the chinacharger from does not even have a clue on what he was selling.
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Old 12-15-2010, 12:50 PM   #24
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I've found like 10 vendors that sell the same one as mine. and it has the same stupid stamping on the compressor housing.
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Old 12-15-2010, 12:52 PM   #25
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I dug up this pic:

DSCN7789.jpg?t=1239121340

this is supposed to be a Chinacharger GT2860 comparable turbo. Source: https://www.miataturbo.net/showthrea...hlight=measure

The above does not have the turbine design of a true Garrett GT2860. It has the turbine of a GT25 series.

It should look more like this:

Name:  P1010303.jpg
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Size:  115.2 KB

less blades and greater spacing.


However, 45.5mm turbine inducer suggests a turbine smaller than a GT2052... get what im getting at now?




and FWIW, that compressor wheel in his post looks to be identical to mine...and it should NOT be. A real Garrett GT2560 or 2860 have a 60 trim compressor wheel... his measurements suggest a 50 trim wheel like mine.
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Old 12-15-2010, 01:00 PM   #26
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How does that work? Still ain't going to fix everything past 5000RPM.
I was thinking in the mid range where he lost 40hp.
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Old 12-28-2010, 12:27 PM   #27
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Quote:
Originally Posted by djp0623 View Post
If it is wheel design that makes the difference.....Maybe the next person should by a chhurbo from the same manufacturer as Brain.

Brain: Where did you buy yours? Mine is an emotor usa, same as levnubin. Maybe some churbo manufacturers do a little more R&D when ripping off an design.
i bought the same turbo brain has and its sitting in my room waiting until i can install it. brains is emusa, mine has the stamp where the "serial number" is
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Old 12-28-2010, 02:59 PM   #28
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I'd imagine 95% of the churbos are made in the same 2 sweat shops. Maybe the 8 year old assembling the one used by the OP didn't get his 2 tbsp of rice that day and did a shitty job?
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Old 12-29-2010, 12:09 PM   #29
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I would like to see the comparison between an actual 2871 curve and this. Some of the difference is related to the overall larger turbo. I am not impressed with that 2554 boost line. I have a pea shooter exhaust as well and my churbo has better boost threshold than the said 2554 line. So... Someone mail me a 2554. I will go make sexy dynos and we will settle this. Truth is, I am not convinced by "This larger turbo has a worse boost threshold and it is because it is chinese." I know there is a difference, but it is doubtful that it is that large.
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Old 01-04-2011, 01:13 PM   #30
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My Garrett GT2560R will be here next week. I will post a new chart after installation and tuning.
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Old 01-04-2011, 01:24 PM   #31
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Originally Posted by nismo502 View Post
My Garrett GT2560R will be here next week. I will post a new chart after installation and tuning.
You will love it.
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