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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 06-01-2007, 05:46 PM   #1
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Default Ebay turbo ??

Ok new forums and to miatas. I was a VW guy and im picking up my 91 miata next week. I for sure want to turbo the car that is why im buying one. Iím also pretty sure i want to us MSPNP. I think im going to buy a greddy kit but im not sure. Does any one know what the deal is with this kit.

http://cgi.ebay.com/ebaymotors/mazda...QQcmdZViewItem

Is there another low price kit I should conceder?

Thanks Guys
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Old 06-01-2007, 05:53 PM   #2
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This kit contains NO fuel management, or ACU. Consider buying a Bipes and a Vortec FMU or BEGi
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Old 06-01-2007, 05:56 PM   #3
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What if i buy the ebay kit and MSPNP would that be ok with upgrade injecters?
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Old 06-01-2007, 06:07 PM   #4
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Problem with the Ebay kits is the knockoff Chinese GT turbos. They are junk. And some of them aren't even 'authentic' Chinese GT turbos, they're knockoffs of a knockoff and are even worse.

Since the bulk of what you're paying for is a turbo that should go right in the trash, I'd avoid it and piece the kit together- all that stuff can be bought off ebay individually and then you can get a real MHI 16G, Big 16G or Evo 16G for under $600 from any legitimate turbo vendor. You may spend a bit more doing that, and your manifold is still going to be questionable, but who wants to R&R their new turbo after 500 miles?
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Old 06-01-2007, 06:09 PM   #5
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Ok so what about the greddy kit vs building one for my self?
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Old 06-01-2007, 06:13 PM   #6
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What year is your car? Greddy is decent and can be had cheap used. But for the best bang for your buck i'd go DIY. I'm piecing a DIY for my 94 and I'm at 1400 and i have all my parts. I will be pushing 10-12psi and making ~200 WHP.
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Old 06-01-2007, 06:15 PM   #7
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Did you start this same thread on m.net just recently?

The bad thing about the greddy is there are known problems. The good thing is they are known and can be dealt with.

Make sure you change out the mounting hardware, tighten the wastgate actuator arm and do the relief cuts.

The problem with the kit you show is that the problems aren't known, so difficult to avoid.
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Old 06-01-2007, 06:18 PM   #8
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Quote:
Originally Posted by Dow.tom View Post
What year is your car? Greddy is decent and can be had cheap used. But for the best bang for your buck i'd go DIY. I'm piecing a DIY for my 94 and I'm at 1400 and i have all my parts. I will be pushing 10-12psi and making ~200 WHP.
$1400 and you have a questionable turbo that needs a rebuild. I bought my greddy kit used (only 7000miles on the setup), 100% ready to run 8psi with a bipes, vortech (sold to by a BEGI, made $15) boostgauge, I/C and piping. Was able to bolt it all in. I paid about $1600 for it. I've since upgraded a lot of it.

Used greddy is the best bang for the buck if you are a 90-93
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Old 06-01-2007, 07:44 PM   #9
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Everyone bashes on these "chinese" turbos, yet has anyone actually had any first hand experience with them? I say this as my friend bought one off ebay for $200 brand new. He has had it on his car for about 8 months now with 0 problems, boosts fine, seems to make some decent power. Its a T3/T4 Hybrid so lag is apparent, but the turbo itself is fine. For the price, you could go through 2 chinese turbos for the price for a "real" turbo.
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Old 06-01-2007, 07:56 PM   #10
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Quote:
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They are junk. And some of them aren't even 'authentic' Chinese GT turbos, they're knockoffs of a knockoff and are even worse.
LOL dude you killed me LOL

For the matter just buy something authentic, it’s not that expensive.
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Old 06-01-2007, 07:59 PM   #11
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I'm speaking specifically of the 'GT' copy of the MHI EVO 16G, I have no idea about Garrett clones but the GT 16G has been proven to be junk time and again. Not only that, the GT 16G retail isn't cheaper than the real thing, it's the same, they offer it as already having a ported turbine and with a 34mm flapper, that's supposed to be the selling point over the real thing. The knock offs of the GT 16G are worse, they are sold by SSAutochrome and some others, these ones are about half the price.

People have taken apart Chinese copies and found them to be inferior in many ways, including compressor blades being different widths- I'm not sure I'd trust a compressor wheel like that at over 100,000rpms- maybe you would. A real MHI turbo will last more than 150k miles. I know, I've done it.

Again, I know nothing of the Garrett stuff but I wouldn't trust it after what I've seen of the MHI copies. Could be different factories 3000 miles apart, maybe one has better QC than the other but when we're talking about my money and time I'm not going to **** with it.
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Old 06-01-2007, 08:36 PM   #12
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Quote:
Originally Posted by jayc72 View Post
$1400 and you have a questionable turbo that needs a rebuild. I bought my greddy kit used (only 7000miles on the setup), 100% ready to run 8psi with a bipes, vortech (sold to by a BEGI, made $15) boostgauge, I/C and piping. Was able to bolt it all in. I paid about $1600 for it. I've since upgraded a lot of it.

Used greddy is the best bang for the buck if you are a 90-93

I'm running a 1994, IE, Greddy doesnt fit.
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Old 06-01-2007, 08:47 PM   #13
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what's your budget?
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Old 06-01-2007, 09:01 PM   #14
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The manifolds etc are good even coupling it with a real mitsu 16g for 500-550$ my setup cost me 1500 dollars including ebay clutch not bad for 200 whp. Get this with MSPNP and you will be fine. GL man. Also dont forget your clutch is weaksauce.
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Old 06-01-2007, 11:21 PM   #15
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First i have not asked this question any where else. Just to the guys that would know (you guys) Second there is no buget limits i want to do it right the frist time and not cut any corners. My first thought was greddy kit with a IC kit from some where and autozone rx7 550cc injectors which are 48 buck each along with the MSPNP with the AFM removed. I want to pu the stock motor at the most it can handle. Which seems to be around 250 hp and 250 lbs.
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Old 06-01-2007, 11:37 PM   #16
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skip the greddy kit...to make your goal you'll replace everything.

invest the most into the manifold/dp/turbo. the rest is easy.
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Old 06-01-2007, 11:44 PM   #17
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Well that is bad news for me because i have no clue what to buy then :( I mean which turbo.
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Old 06-02-2007, 09:24 AM   #18
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If you dont have to many budget constriants buy a kit from Begi, or FM preferably Begi. Talk to Corky and he can walk you through what you want. The ebay kits are great i run a version of one but they are more for the budget concius than the no holds barred do it once and be done setup. Stock motors have been known to run 300 whp for a pretty good time. the rear and the tranny is a different matter.
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Old 06-06-2007, 10:54 AM   #19
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Quote:
Originally Posted by jwarriner View Post
I'm speaking specifically of the 'GT' copy of the MHI EVO 16G, I have no idea about Garrett clones but the GT 16G has been proven to be junk time and again. Not only that, the GT 16G retail isn't cheaper than the real thing, it's the same, they offer it as already having a ported turbine and with a 34mm flapper, that's supposed to be the selling point over the real thing. The knock offs of the GT 16G are worse, they are sold by SSAutochrome and some others, these ones are about half the price.

People have taken apart Chinese copies and found them to be inferior in many ways, including compressor blades being different widths- I'm not sure I'd trust a compressor wheel like that at over 100,000rpms- maybe you would. A real MHI turbo will last more than 150k miles. I know, I've done it.

Again, I know nothing of the Garrett stuff but I wouldn't trust it after what I've seen of the MHI copies. Could be different factories 3000 miles apart, maybe one has better QC than the other but when we're talking about my money and time I'm not going to **** with it.
There is obviously a great deal of variation in the chinese turbo market. The T3/T4 clones that I have used seem pretty damn good and despite being "inferior" hold up well to abuse. YMWV. It's a crap shoot, but I liked my little $200 Ebay turbo.

Mark
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Old 03-29-2008, 10:34 PM   #20
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ebay ecarp lol
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